{"query":{"parameter":"total suspended","place":"US-SD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-SD","US"],"parameter_keys":["name:total suspended","name:residue: non-filterable","name:solids - total suspended","name:total suspended solids","name:total suspended sediment or turbidity","name:tss"],"names_matched":[["total suspended","name:total suspended"],["residue non filterable total suspended solids","name:residue: non-filterable"],["solids total suspended tss","name:solids - total suspended"],["total suspended matter","name:total suspended solids"],["total suspended sediment or turbidity","name:total suspended sediment or turbidity"],["total suspended sediments excluding growing algae","name:total suspended solids"],["total suspended solids","name:total suspended solids"],["total suspended solids","name:tss"],["total suspended solids tss","name:total suspended solids"],["total suspended solids tss or non filterable solids","name:total suspended solids"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":2976,"names":["TSS","Suspended solids","SS"],"says":"2976 rows share a parameter key with a longer name holding \"total suspended\" but are printed under names without these words (that key is wider than the name): not sent. Ask for one by its name or CAS number."}},"total":872,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"10fc285dbd22f3e4","parameter":"Total Suspended Solids","value":"< 30","value_num":30,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of coldwater permanent fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:45","page":23,"quote":"Total Suspended Solids < 30 mg/L 30-day average"}},{"id":"7c43df87c57c1007","parameter":"Total Suspended Solids","value":"< 53","value_num":53,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of coldwater permanent fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:45","page":23,"quote":"< 53 mg/L daily maximum"}},{"id":"733f5ca7f006e708","parameter":"Total Suspended Solids","value":"< 90","value_num":90,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of coldwater marginal fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:46","page":24,"quote":"Total Suspended Solids < 90 mg/L 30-day average"}},{"id":"6a1e501ed1cf9ae5","parameter":"Total Suspended Solids","value":"< 158","value_num":158,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of coldwater marginal fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:46","page":24,"quote":"< 158 mg/L daily maximum"}},{"id":"4411f888c3eb79c2","parameter":"Total Suspended Solids","value":"< 90","value_num":90,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of warmwater permanent fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:47","page":25,"quote":"Total Suspended Solids < 90 mg/L 30-day average"}},{"id":"d47534a1129b1168","parameter":"Total Suspended Solids","value":"< 158","value_num":158,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of warmwater permanent fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:47","page":25,"quote":"< 158 mg/L daily maximum"}},{"id":"c423673c9edf2fb9","parameter":"Total Suspended Solids","value":"< 90","value_num":90,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of warmwater semipermanent fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:48","page":26,"quote":"Total Suspended Solids < 90 mg/L 30-day average"}},{"id":"c1b29c511537181e","parameter":"Total Suspended Solids","value":"< 158","value_num":158,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of warmwater semipermanent fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:48","page":26,"quote":"< 158 mg/L daily maximum"}},{"id":"117472906c541053","parameter":"Total Suspended Solids","value":"< 4,525","value_num":4525,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of semipermanent fish life propagation waters: the White River from the Nebraska-South Dakota border to its confluence with the Missouri River (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)","White River from the Nebraska- South Dakota border to its confluence with Willow Creek"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:48.01","page":26,"quote":"White River from the Nebraska- South Dakota border to its confluence with Willow Creek < 4,525 mg/L daily maximum"}},{"id":"c3d591d2ec15f41b","parameter":"Total Suspended Solids","value":"< 24,300","value_num":24300,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of semipermanent fish life propagation waters: the White River from the Nebraska-South Dakota border to its confluence with the Missouri River (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)","White River from its confluence with Willow Creek to its confluence with the Little White River"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:48.01","page":26,"quote":"White River from its confluence with Willow Creek to its confluence with the Little White River < 24,300 mg/L daily maximum"}},{"id":"779be406ecaff0c7","parameter":"Total Suspended Solids","value":"< 21,550","value_num":21550,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of semipermanent fish life propagation waters: the White River from the Nebraska-South Dakota border to its confluence with the Missouri River (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)","White River from its confluence with the Little White River to its confluence with the Missouri River"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:48.01","page":26,"quote":"White River from its confluence with the Little White River to its confluence with the Missouri River < 21,550 mg/L daily maximum"}},{"id":"c417d4c7c2bb8e25","parameter":"Total Suspended Solids","value":"< 1,733","value_num":1733,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of semipermanent fish life propagation waters: the Little White River from its confluence with Rosebud Creek to its confluence with the White River (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:48.02","page":27,"quote":"Total Suspended solids < 1,733 mg/L daily maximum"}},{"id":"617c1799a9c9c1a6","parameter":"Total Suspended Solids","value":"< 150","value_num":150,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of warmwater marginal fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:49","page":27,"quote":"Total Suspended Solids < 150 mg/L 30-day average"}},{"id":"4987fb11c76bf451","parameter":"Total Suspended Solids","value":"< 263","value_num":263,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total suspended solids","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of warmwater marginal fish life propagation waters (a water's uses: chapters 74:51:02 lakes and 74:51:03 streams)"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","section":"ARSD 74:51:01:49","page":27,"quote":"< 263 mg/L daily maximum"}},{"id":"c282031defbed230","parameter":"Total suspended","value":"8,795.000","value_num":8795,"unit":"mg/kg (pounds per million pounds) of beryllium carbonate produced as beryllium","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:total suspended","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart O—Primary Beryllium Subcategory","existing sources (BPT)","(c) Beryllium Carbonate Filtrate.","table: BPT Limitations for the Primary Beryllium Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.152 (BPT)","page":null,"quote":"Total suspended 8,795.000 4,183.000"}},{"id":"d31251a9f4582c6c","parameter":"Total suspended","value":"4,183.000","value_num":4183,"unit":"mg/kg (pounds per million pounds) of beryllium carbonate produced as beryllium","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:total suspended","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart O—Primary Beryllium Subcategory","existing sources (BPT)","(c) Beryllium Carbonate Filtrate.","table: BPT Limitations for the Primary Beryllium Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.152 (BPT)","page":null,"quote":"Total suspended 8,795.000 4,183.000"}},{"id":"d8647ef13e92efcd","parameter":"Total Suspended solids","value":"3.0","value_num":3,"unit":"kg/kkg of product","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","existing sources (BPT)"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.22 (BPT)","page":null,"quote":"Total Suspended solids 3.0 1.5"}},{"id":"57718c8d62d871a7","parameter":"Total Suspended solids","value":"1.5","value_num":1.5,"unit":"kg/kkg of product","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","existing sources (BPT)"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.22 (BPT)","page":null,"quote":"Total Suspended solids 3.0 1.5"}},{"id":"05fcf642a7673a45","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of paste produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(a) Subpart B—Anode and Cathode Paste Plant Wet Air.","table: Pollution Control—NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"d4d4fd2c53ba54d5","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of paste produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(a) Subpart B—Anode and Cathode Paste Plant Wet Air.","table: Pollution Control—NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"d4182fb36821df30","parameter":"Total suspended solids","value":"3.135","value_num":3.135,"unit":"mg/kg (pound per million pounds) of anodes cast","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(b) Subpart B—Anode Contact Cooling and Briquette Quenching.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 3.135 2.508"}},{"id":"a1c74318d5a62b2a","parameter":"Total suspended solids","value":"2.508","value_num":2.508,"unit":"mg/kg (pound per million pounds) of anodes cast","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(b) Subpart B—Anode Contact Cooling and Briquette Quenching.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 3.135 2.508"}},{"id":"9a6df1f4c3129918","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of anodes baked","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(c) Subpart B—Anode Bake Plant Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"c9f566af6d613d12","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of anodes baked","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(c) Subpart B—Anode Bake Plant Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"14859aecbaebcc8d","parameter":"Total suspended solids","value":"2,172.000","value_num":2172,"unit":"mg/kg (pound per million pounds) of cryolite recovered","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(d) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Not Commingled With Other Process or Nonprocess Waters).","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 2,172.000 945.800"}},{"id":"8e5d8413569766ca","parameter":"Total suspended solids","value":"945.800","value_num":945.8,"unit":"mg/kg (pound per million pounds) of cryolite recovered","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(d) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Not Commingled With Other Process or Nonprocess Waters).","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 2,172.000 945.800"}},{"id":"6c4a55232ffae269","parameter":"Total suspended solids","value":"2,172.000","value_num":2172,"unit":"mg/kg (pound per million pounds) of cryolite recovered","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(e) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Commingled With Other Process or Nonprocess Waters).","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 2,172.000 945.800"}},{"id":"c349d935a910cadb","parameter":"Total suspended solids","value":"945.800","value_num":945.8,"unit":"mg/kg (pound per million pounds) of cryolite recovered","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(e) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Commingled With Other Process or Nonprocess Waters).","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 2,172.000 945.800"}},{"id":"e4e45452f7db5d85","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(f) Subpart B—Potline Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"662274a88eae52b6","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(f) Subpart B—Potline Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"19bd2180ef1af8cf","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(g) Subpart B—Potroom Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"65168425e7d29433","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(g) Subpart B—Potroom Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"901673fa3c713c40","parameter":"Total suspended solids","value":"20.120","value_num":20.12,"unit":"mg/kg (pound per million pounds) aluminum produced from electrolytic reduction","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(h) Subpart B—Potline SO 2 Emissions Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 20.120 16.090"}},{"id":"4bdf745c8ed198f2","parameter":"Total suspended solids","value":"16.090","value_num":16.09,"unit":"mg/kg (pound per million pounds) aluminum produced from electrolytic reduction","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(h) Subpart B—Potline SO 2 Emissions Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 20.120 16.090"}},{"id":"ccaf2a62bc611daf","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(i) Subpart B—Degassing Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"d875753ccbd58795","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(i) Subpart B—Degassing Wet Air Pollution Control.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"dfc0b15c4573485e","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(j) Subpart B—Pot Repair and Pot Soaking.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"a5c8b310555d2194","parameter":"Total suspended solids","value":".000","value_num":0,"unit":"mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(j) Subpart B—Pot Repair and Pot Soaking.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids .000 .000"}},{"id":"0d6a496e3a81e628","parameter":"Total suspended solids","value":"19.940","value_num":19.94,"unit":"mg/kg (pound per million pounds) of aluminum product from direct chill casting","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(k) Subpart B—Direct Chill Casting Contact Cooling.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 19.940 15.950"}},{"id":"0875485483c131fc","parameter":"Total suspended solids","value":"15.950","value_num":15.95,"unit":"mg/kg (pound per million pounds) of aluminum product from direct chill casting","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(k) Subpart B—Direct Chill Casting Contact Cooling.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","section":"40 CFR 421.24 (NSPS)","page":null,"quote":"Total suspended solids 19.940 15.950"}},{"id":"d0ef8bfe3e3aa343","parameter":"Total suspended solids","value":"1.560","value_num":1.56,"unit":"mg/kg (pound per million pounds) of aluminum product from rod casting","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tss","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart B—Primary Aluminum Smelting Subcategory","new sources (NSPS)","(l) Subpart B—Continuous Rod Casting Contact Cooling.","table: NSPS"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE 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