{"query":{"parameter":"conductivity at 25 c","place":"US-SD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-SD","US"],"parameter_keys":["name:conductivity at 25 °c"],"names_matched":[["conductivity at 25 c","name:conductivity at 25 °c"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":4,"offset":0,"returned":4,"next_offset":null,"rows":[{"id":"bb0e44f3b79edd34","parameter":"Conductivity at 25 °C","value":"< 4,000","value_num":4000,"unit":"µS/cm","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:conductivity at 25 °c","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of fish and wildlife propagation, recreation, and stock watering 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","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"ARSD 74:51:01:52","page":29,"quote":"Conductivity at 25C < 4,000 micromhos/cm 30-day average"}},{"id":"cc943c846557b2bb","parameter":"Conductivity at 25 °C","value":"< 7,000","value_num":7000,"unit":"µS/cm","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:conductivity at 25 °c","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of fish and wildlife propagation, recreation, and stock watering 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","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"ARSD 74:51:01:52","page":29,"quote":"< 7,000 micromhos/cm daily maximum"}},{"id":"a5d2a90aa7a7b65d","parameter":"Conductivity at 25 °C","value":"< 2,500","value_num":2500,"unit":"µS/cm","statistic":"monthly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:conductivity at 25 °c","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of irrigation waters (April 1 - October 31 only) (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","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"ARSD 74:51:01:53","page":30,"quote":"Conductivity at 25C < 2,500 micromhos/cm 30-day average"}},{"id":"e1e6da9045d9afc5","parameter":"Conductivity at 25 °C","value":"< 4,375","value_num":4375,"unit":"µS/cm","statistic":"daily_max","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:conductivity at 25 °c","place":["US-SD"],"conditions":["receiving_water is freshwater","waters assigned the beneficial use of irrigation waters (April 1 - October 31 only) (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","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"ARSD 74:51:01:53","page":30,"quote":"< 4,375 micromhos/cm daily maximum"}}],"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-SD"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"conductivity at 25 c\", 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-SD"},"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"}]}