{"query":{"parameter":"tds","place":"US-TN","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-TN","US"],"parameter_keys":["name:tds","name:total dissolved solids"],"names_matched":[["tds","name:tds"],["tds","name:total dissolved solids"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":17,"offset":0,"returned":17,"next_offset":null,"rows":[{"id":"1f2c90224efd1885","parameter":"Total dissolved solids","value":"(d) Total Dissolved Solids - The total dissolved solids shall at no time exceed 500 mg/l.","value_num":500,"unit":"mg/L","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total dissolved solids","place":["US-TN"],"conditions":["receiving_water is freshwater","waters designated for domestic water supply (Rule 0400-40-03-.03(1))"],"cite":{"instrument":"us_tn_wqs","title":"Tennessee Rule 0400-40-03-.03 Criteria for Water Uses (Chapter 0400-40-03 General Water Quality Criteria): domestic water supply, fish and aquatic life (CMC/CCC) and recreation human health criteria; TDS, dissolved oxygen and pH","issuer":"State of Tennessee, Department of Environment and Conservation (Board of Water Quality, Oil, and Gas)","edition":"Chapter 0400-40-03 as revised March 2024 (amendments filed December 18, 2023, effective March 17, 2024), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/system/files/documents/2024-07/tn_wqs_0011_062024.pdf","source_sha256":"4c9ee91b2941f44106d7cbb5009fe40f470c0c530b183b399370ce4567242717","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Rule 0400-40-03-.03(1)(d)","page":4,"quote":"(d) Total Dissolved Solids - The total dissolved solids shall at no time exceed 500 mg/l."}},{"id":"fba6136c724c573f","parameter":"Total dissolved solids","value":"(d) Total Dissolved Solids - The total dissolved solids shall at no time exceed 500 mg/l.","value_num":500,"unit":"mg/L","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:total dissolved solids","place":["US-TN"],"conditions":["receiving_water is freshwater","waters designated for industrial water supply (Rule 0400-40-03-.03(2))"],"cite":{"instrument":"us_tn_wqs","title":"Tennessee Rule 0400-40-03-.03 Criteria for Water Uses (Chapter 0400-40-03 General Water Quality Criteria): domestic water supply, fish and aquatic life (CMC/CCC) and recreation human health criteria; TDS, dissolved oxygen and pH","issuer":"State of Tennessee, Department of Environment and Conservation (Board of Water Quality, Oil, and Gas)","edition":"Chapter 0400-40-03 as revised March 2024 (amendments filed December 18, 2023, effective March 17, 2024), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/system/files/documents/2024-07/tn_wqs_0011_062024.pdf","source_sha256":"4c9ee91b2941f44106d7cbb5009fe40f470c0c530b183b399370ce4567242717","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Rule 0400-40-03-.03(2)(d)","page":6,"quote":"(d) Total Dissolved Solids - The total dissolved solids shall at no time exceed 500 mg/l."}},{"id":"7fcbc703e544b3d7","parameter":"TDS","value":"306","value_num":306,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tds","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(3) Voluntary incentives plan. (i) For dischargers who voluntarily choose to meet the effluent limitations for FGD wastewater in this paragraph (g)(3)(i), the quantity of pollutants in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in table 7 to this paragraph (g)(3)(i). Dischargers who choose to meet the effluent…","table: Table 7 to Paragraph ( g )(3)( i )"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"TDS (mg/L) 306 149"}},{"id":"0847ec7b9bcedc86","parameter":"TDS","value":"149","value_num":149,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tds","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(3) Voluntary incentives plan. (i) For dischargers who voluntarily choose to meet the effluent limitations for FGD wastewater in this paragraph (g)(3)(i), the quantity of pollutants in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in table 7 to this paragraph (g)(3)(i). Dischargers who choose to meet the effluent…","table: Table 7 to Paragraph ( g )(3)( i )"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"TDS (mg/L) 306 149"}},{"id":"1d4d5c4590b179b7","parameter":"TDS","value":"50","value_num":50,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tds","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","new sources (NSPS)","(13) FGD wastewater. The quantity of pollutants discharged in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.15 (NSPS)","page":null,"quote":"TDS (mg/L) 50 24"}},{"id":"9947e7acf5baa2bb","parameter":"TDS","value":"24","value_num":24,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:tds","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","new sources (NSPS)","(13) FGD wastewater. The quantity of pollutants discharged in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.15 (NSPS)","page":null,"quote":"TDS (mg/L) 50 24"}},{"id":"f52e728b40e5a558","parameter":"TDS","value":"50","value_num":50,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:tds","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","new sources (PSNS)","(6) FGD wastewater. The quantity of pollutants discharged in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.17 (PSNS)","page":null,"quote":"TDS (mg/L) 50 24"}},{"id":"81512f5088f616a6","parameter":"TDS","value":"24","value_num":24,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:tds","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","new sources (PSNS)","(6) FGD wastewater. The quantity of pollutants discharged in FGD wastewater shall not exceed the quantity determined by multiplying the flow of FGD wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.17 (PSNS)","page":null,"quote":"TDS (mg/L) 50 24"}},{"id":"a0a4aa5a390d294a","parameter":"Total dissolved solids","value":"38","value_num":38,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(j)(1)(i) Gasification wastewater. Except for those discharges to which paragraph (j)(2) of this section applies, the quantity of pollutants in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the table following this paragraph (j)(1)(i). Dischargers must meet the effluent limitations in this pa…"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"6a7ce9955ba7d21f","parameter":"Total dissolved solids","value":"22","value_num":22,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","existing sources (BAT)","(j)(1)(i) Gasification wastewater. Except for those discharges to which paragraph (j)(2) of this section applies, the quantity of pollutants in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the table following this paragraph (j)(1)(i). Dischargers must meet the effluent limitations in this pa…"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.13 (BAT)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"5f54419111d43303","parameter":"Total dissolved solids","value":"38","value_num":38,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","new sources (NSPS)","(15) Gasification wastewater. The quantity of pollutants discharged in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.15 (NSPS)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"741ded8be58fd821","parameter":"Total dissolved solids","value":"22","value_num":22,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is direct","cites is 40 CFR 423","new sources (NSPS)","(15) Gasification wastewater. The quantity of pollutants discharged in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.15 (NSPS)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"32291ca65c23db2a","parameter":"Total dissolved solids","value":"38","value_num":38,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","existing sources (PSES)","(i) Gasification wastewater. For any electric generating unit with a total nameplate generating capacity of more than 50 megawatts and that is not an oil-fired unit, the quantity of pollutants in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the table following this paragraph (i). Dischargers…"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.16 (PSES)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"6d1466c807c1fbfa","parameter":"Total dissolved solids","value":"22","value_num":22,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","existing sources (PSES)","(i) Gasification wastewater. For any electric generating unit with a total nameplate generating capacity of more than 50 megawatts and that is not an oil-fired unit, the quantity of pollutants in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the table following this paragraph (i). Dischargers…"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.16 (PSES)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"0c7335b1db7189d8","parameter":"Total dissolved solids","value":"38","value_num":38,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","new sources (PSNS)","(9) Gasification wastewater. The quantity of pollutants discharged in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.17 (PSNS)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"283f2e4073891ddd","parameter":"Total dissolved solids","value":"22","value_num":22,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["route is sewer","cites is 40 CFR 423","new sources (PSNS)","(9) Gasification wastewater. The quantity of pollutants discharged in gasification wastewater shall not exceed the quantity determined by multiplying the flow of gasification wastewater times the concentration listed in the following table:"],"cite":{"instrument":"us_40cfr423","title":"40 CFR Part 423 — PART 423—STEAM ELECTRIC POWER GENERATING 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=423","source_sha256":"60cadc14b8fc25c39238a9d55cede55743d6b349ca20c8f8158b0f7e5d98fd64","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 423.17 (PSNS)","page":null,"quote":"Total dissolved solids (mg/L) 38 22"}},{"id":"97602088892d6b04","parameter":"Total dissolved solids (TDS)","value":"500 mg/l","value_num":500,"direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"name:total dissolved solids","place":["US"],"conditions":["40 CFR 143.1: The regulations in this subpart are not Federally enforceable but are intended as guidelines for the States."],"cite":{"instrument":"us_nsdwr","title":"40 CFR Part 143 — National Secondary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=143","source_sha256":"a98e8b66948f546c71e119055eff012e6380857a255ec216a4247b658bcf040d","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"143.3","page":null,"quote":null,"column":"smcl"}}],"next":[{"tool":"check_values","says":"Has your user measured this? check_values sets each of their results beside every row held here, with a verdict and the row's cite.","arguments":{"place":"US-TN"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"tds\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"US-TN"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}