{"permit":"LA0043974","name":"MER ROUGE, VILLAGE OF","state":"LA","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/LA0043974"},"about":[{"label":"What it is","text":"Sewage treatment plant"},{"label":"Where","text":"Mer Rouge, Louisiana","href":"https://www.openstreetmap.org/?mlat=32.794444&mlon=-91.810833#map=14/32.794444/-91.810833"},{"label":"Last 12 months","text":"Over a limit 2 times, last in February 2026 (Solids, total suspended)"},{"label":"Permit","text":"In force until Sep 14, 2028"}],"renewal_due":null,"renewal_check":{"offered_because":"application_due_within_18_months","application_due":"2028-03-18","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/LA0043974#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":"2026-07-31","over":2,"over_by":[["Solids, total suspended",2]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Solids, total suspended","times":2,"find_limits":{"parameter":"total suspended solids","place":"US-LA","medium":"water_discharge"},"get":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-LA&medium=water_discharge"}],"upcoming":[{"parameter":"Nitrogen, ammonia total [as N]","outfall":"01A","limit":1.8,"unit":"mg/L","statistic":"monthly average","statistic_code":"MK","begin":"2028-09-14","kind":"tighter","now":{"median":1.53,"n":10,"below_detection":2},"times_limit":0.85},{"parameter":"Nitrogen, ammonia total [as N]","outfall":"01A","limit":7.6,"unit":"lb/d","statistic":"monthly 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state and federal limits for it, each with its rule; `get` is the address to fetch, and `over_limits` holds one for each parameter.","arguments":{"parameter":"total suspended solids","place":"US-LA","medium":"water_discharge"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-LA&medium=water_discharge","url":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-LA&medium=water_discharge","page":"https://passage-data.com/limits/US-LA/total-suspended-solids"},{"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":"LA0043974"},"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=LA0043974"},{"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":"LA0043974"},"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=LA0043974"}]}