{"permit":"MI0037486","name":"Kent County Department of Public Works","state":"MI","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/MI0037486"},"about":[{"label":"What it is","text":"Refuse Systems (EPA's industry listing)"},{"label":"Where","text":"Rockford, Michigan","href":"https://www.openstreetmap.org/?mlat=43.1144263&mlon=-85.595213#map=14/43.1144263/-85.595213"},{"label":"Last 12 months","text":"Over a limit once, last in July 2026 (Oxygen, dissolved [DO])"},{"label":"Permit","text":"In force until Oct 1, 2029"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"MI","sic":"4953","permits":13,"list":"https://passage-data.com/api/v1/permits?state=MI&sic=4953","page":"https://passage-data.com/dmr/s/MI/4953"},"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":1,"over_by":[["Oxygen, dissolved [DO]",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Oxygen, 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this state in one call, each with its page and its get_permit address; `get` is the address to fetch.","arguments":{"state":"MI","sic":"4953"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=MI&sic=4953","url":"https://passage-data.com/api/v1/permits?state=MI&sic=4953","page":"https://passage-data.com/dmr/s/MI/4953"},{"tool":"find_limits","says":"What do the rules say about what it went over on? find_limits gives the cited 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":"dissolved oxygen","place":"US-MI","medium":"surface_water"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=dissolved+oxygen&place=US-MI&medium=surface_water","url":"https://passage-data.com/api/v1/limits?parameter=dissolved+oxygen&place=US-MI&medium=surface_water","page":"https://passage-data.com/limits/US-MI/dissolved-oxygen"},{"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":"MI0037486"},"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=MI0037486"},{"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":"MI0037486"},"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 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