{"permit":"MD0020150","name":"DEPARTMENT OF THE NAVY - NAS P","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/MD0020150"},"about":[{"label":"What it is","text":"Federal facility · National Security (EPA's industry listing)"},{"label":"Where","text":"Naval Air Station Patuxent River, Maryland","href":"https://www.openstreetmap.org/?mlat=38.286666&mlon=-76.441945#map=14/38.286666/-76.441945"},{"label":"Last 12 months","text":"Over a limit once, last in December 2025 (Oil & Grease). 5 required values not reported. 1 of 3 reports filed late"},{"label":"Permit","text":"In force until Jan 31, 2027"}],"renewal_due":{"date":"2026-08-04","when":"Aug 4, 2026, overdue","urgent":true},"renewal_check":{"offered_because":"application_overdue","application_due":"2026-08-04","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/MD0020150#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":"MD","sic":"97","permits":8,"list":"https://passage-data.com/api/v1/permits?state=MD&sic=97","page":"https://passage-data.com/dmr/s/MD/97"},"limits_from_version":null,"record":{"last_filed":"2026-06-30","over":1,"over_by":[["Oil & Grease",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Oil & Grease","times":1,"find_limits":{"parameter":"oil grease","place":"US-MD","medium":"water_discharge"},"get":"https://passage-data.com/api/v1/limits?parameter=oil+grease&place=US-MD&medium=water_discharge"}],"limits":[{"outfall":"009","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6.5","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6.5","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"8.5","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"8.5","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"Oil & Grease","parameter_code":"00556","statistic":"daily maximum","qualifier":"<=","value":"15","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"Oil & Grease","parameter_code":"00556","statistic":"daily maximum","qualifier":"<=","value":"15","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"monthly average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"19-DP-2518"},{"outfall":"009","parameter":"Flow, in conduit or thru treatment plant","parameter_code":"50050","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"19-DP-2518"}],"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":"97"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=MD&sic=97","url":"https://passage-data.com/api/v1/permits?state=MD&sic=97","page":"https://passage-data.com/dmr/s/MD/97"},{"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":"oil grease","place":"US-MD","medium":"water_discharge"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=oil+grease&place=US-MD&medium=water_discharge","url":"https://passage-data.com/api/v1/limits?parameter=oil+grease&place=US-MD&medium=water_discharge","page":"https://passage-data.com/limits/US-MD/oil-grease"},{"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":"MD0020150"},"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=MD0020150"},{"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":"MD0020150"},"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=MD0020150"}]}