{"permit":"SD0020010","name":"Madison, City of","state":"SD","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/SD0020010"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Madison, South Dakota","href":"https://www.openstreetmap.org/?mlat=43.990861&mlon=-97.092000#map=14/43.990861/-97.092000"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"In force until Jun 30, 2027"}],"renewal_due":{"date":"2027-01-01","when":"Jan 1, 2027 (in 58 days)","urgent":false},"renewal_check":{"offered_because":"application_due_within_18_months","application_due":"2027-01-01","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/SD0020010#renewal","says":"Each limit a renewal could tighten or add, from the state's water-quality standards and the federal rules for this kind of discharge, each cited to its rule, beside EPA's 12-month record; a rule we do not hold is named, never guessed. A person orders it on the permit's page with their email; it is sent by email within 5 business days."},"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-06-30","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"002","parameter":"Cyanide, weak acid, dissociable","parameter_code":"00718","statistic":"value","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Semiannual Influent Metals Monitoring"},{"outfall":"002","parameter":"Cyanide, total [as CN]","parameter_code":"00720","statistic":"value","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Semiannual Influent Metals Monitoring"},{"outfall":"002","parameter":"Hardness, total [as CaCO3]","parameter_code":"00900","statistic":"value","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Semiannual Influent Metals Monitoring"},{"outfall":"002","parameter":"Arsenic, total recoverable","parameter_code":"00978","statistic":"value","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Semiannual Influent Metals Monitoring"},{"outfall":"002","parameter":"Selenium, total recoverable","parameter_code":"00981","statistic":"value","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Semiannual Influent Metals Monitoring"},{"outfall":"002","parameter":"Thallium, total recoverable","parameter_code":"00982","statistic":"value","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Semiannual Influent Metals Monitoring"},{"outfall":"002","parameter":"Beryllium, total recoverable [as 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Monitoring"},{"outfall":"002","parameter":"Mercury, total recoverable","parameter_code":"71901","statistic":"value","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"Semiannual Influent Metals Monitoring"}],"next":[{"tool":"check_dmr","says":"Before your user files this permit's DMR: check_dmr sets each value beside the permit's limit for that period, with EPA's violation rule's verdict.","arguments":{"permit":"SD0020010"},"needs":{"period_end":"The reporting period: its month (2026-09).","values":"The period's values as your user will file them: [{outfall, parameter, statistic, value, unit}, ...]."},"post":"/api/v1/dmr/check","url":"https://passage-data.com/api/v1/dmr/check","page":"https://passage-data.com/dmr/?permit=SD0020010"},{"tool":"fill_dmr","says":"Has your user the plant's raw daily results? fill_dmr computes the period's DMR values from them, each with the rows it came from.","arguments":{"permit":"SD0020010"},"needs":{"period_end":"The reporting period: its month (2026-09).","rows":"The plant's results: [{date, parameter, value, unit, point}, ...]; or `table`, the lab's or plant's export as text."},"post":"/api/v1/dmr/fill","url":"https://passage-data.com/api/v1/dmr/fill","page":"https://passage-data.com/dmr/?permit=SD0020010"}]}