{"permit":"IA0061972","name":"GERDAU","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/IA0061972"},"about":[{"label":"What it is","text":"Blast Furnaces And Steel Mills (EPA's industry listing)"},{"label":"Where","text":"Wilton, Iowa","href":"https://www.openstreetmap.org/?mlat=41.58787&mlon=-91.04051#map=14/41.58787/-91.04051"},{"label":"Last 12 months","text":"Over a limit 8 times, last in August 2026 (Copper, total [as Cu]; Iron, total [as Fe])"},{"label":"Permit","text":"In force until Feb 29, 2028"}],"renewal_due":null,"renewal_check":{"offered_because":"application_due_within_18_months","application_due":"2027-09-02","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/IA0061972#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":"33","permits":7,"list":"https://passage-data.com/api/v1/permits?state=IA&sic=33","page":"https://passage-data.com/dmr/s/IA/33"},"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":8,"over_by":[["Copper, total [as Cu]",6],["Iron, total [as Fe]",2]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Copper, total [as Cu]","times":6,"find_limits":{"parameter":"copper","place":"US-IA","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-IA&medium=surface_water"},{"parameter":"Iron, total [as Fe]","times":2,"find_limits":{"parameter":"iron","place":"US-IA","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=iron&place=US-IA&medium=surface_water"}],"upcoming":[{"parameter":"Copper, total [as Cu]","outfall":"001","limit":0.0303,"unit":"mg/L","statistic":"30-day average","statistic_code":"3C","begin":"2028-02-01","kind":"tighter","now":{"median":0.02218,"n":11},"times_limit":0.732},{"parameter":"Copper, total [as Cu]","outfall":"001","limit":0.1768,"unit":"lb/d","statistic":"30-day average","statistic_code":"3C","begin":"2028-02-01","kind":"tighter","now":{"median":0.01695,"n":11},"times_limit":0.0958},{"parameter":"Copper, total [as Cu]","outfall":"001","limit":0.0303,"unit":"mg/L","statistic":"daily maximum","statistic_code":"DD","begin":"2028-02-01","kind":"tighter","now":{"median":0.038,"n":11},"times_limit":1.25},{"parameter":"Copper, total [as Cu]","outfall":"001","limit":0.2273,"unit":"lb/d","statistic":"daily maximum","statistic_code":"DD","begin":"2028-02-01","kind":"tighter","now":{"median":0.02615,"n":11},"times_limit":0.115}],"limits":[{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily 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`over_limits` holds one for each parameter.","arguments":{"parameter":"copper","place":"US-IA","medium":"surface_water"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-IA&medium=surface_water","url":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-IA&medium=surface_water","page":"https://passage-data.com/limits/US-IA/copper"},{"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":"IA0061972"},"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=IA0061972"},{"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":"IA0061972"},"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=IA0061972"}]}