{"permit":"IA0052975","name":"DES MOINES WATER WORKS","state":"IA","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/IA0052975"},"about":[{"label":"What it is","text":"Water Supply (EPA's industry listing)"},{"label":"Where","text":"Des Moines, Iowa","href":"https://www.openstreetmap.org/?mlat=41.52521&mlon=-93.69422#map=14/41.52521/-93.69422"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"Expired Apr 30, 2024; its limits still apply until a new permit is issued, and EPA still expects the reports"}],"renewal_due":null,"renewal_check":{"offered_because":"permit_expired","application_due":"2023-11-02","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/IA0052975#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":{"state":"IA","sic":"4941","permits":48,"list":"https://passage-data.com/api/v1/permits?state=IA&sic=4941","page":"https://passage-data.com/dmr/s/IA/4941"},"limits_from_version":null,"record":{"last_filed":"2026-09-30","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily minimum","qualifier":">=","value":"6.5","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, nitrate total [as N]","parameter_code":"00620","statistic":"daily maximum","qualifier":"<=","value":"9.5","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Cadmium, total [as Cd]","parameter_code":"01027","statistic":"30-day average","qualifier":"<=","value":".00045","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Cadmium, total [as Cd]","parameter_code":"01027","statistic":"daily maximum","qualifier":"<=","value":".0043","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Cadmium, total [as Cd]","parameter_code":"01027","statistic":"30-day average","qualifier":"<=","value":".0019","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Cadmium, total [as Cd]","parameter_code":"01027","statistic":"daily maximum","qualifier":"<=","value":".018","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"30-day average","qualifier":"<=","value":".011","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"daily maximum","qualifier":"<=","value":".019","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"30-day average","qualifier":"<=","value":".046","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"daily maximum","qualifier":"<=","value":".079","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"}],"next":[{"tool":"list_permits","says":"Screening this industry? list_permits lists every permit of it in this state in one call, each with its page and its get_permit address; `get` is the address to fetch.","arguments":{"state":"IA","sic":"4941"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=IA&sic=4941","url":"https://passage-data.com/api/v1/permits?state=IA&sic=4941","page":"https://passage-data.com/dmr/s/IA/4941"},{"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":"IA0052975"},"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=IA0052975"},{"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":"IA0052975"},"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=IA0052975"}]}