{"permit":"MD0002658","name":"GenOn Chalk Point, LLC","state":"MD","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/MD0002658"},"about":[{"label":"What it is","text":"Electric Services (EPA's industry listing) · rated a major discharger by EPA"},{"label":"Where","text":"Aquasco, Maryland","href":"https://www.openstreetmap.org/?mlat=38.543851&mlon=-76.685719#map=14/38.543851/-76.685719"},{"label":"Last 12 months","text":"Over a limit 2 times, last in March 2026 (Solids, total suspended). 4 of 22 reports filed late"},{"label":"Permit","text":"In force until Feb 28, 2030"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"MD","sic":"4911","permits":8,"list":"https://passage-data.com/api/v1/permits?state=MD&sic=4911","page":"https://passage-data.com/dmr/s/MD/4911"},"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":2,"over_by":[["Solids, total 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F]","parameter_code":"74027","statistic":"daily maximum","qualifier":null,"value":null,"unit":"deg F","report_only":true,"enforceable":true,"months":"all","limit_set":"23-DP-0627"}],"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":"MD","sic":"4911"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=MD&sic=4911","url":"https://passage-data.com/api/v1/permits?state=MD&sic=4911","page":"https://passage-data.com/dmr/s/MD/4911"},{"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":"total suspended solids","place":"US-MD","medium":"water_discharge"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-MD&medium=water_discharge","url":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-MD&medium=water_discharge","page":"https://passage-data.com/limits/US-MD/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":"MD0002658"},"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=MD0002658"},{"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":"MD0002658"},"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=MD0002658"}]}