{"permit":"TN0064041","name":"Metro Nashville Airport Authority","state":"TN","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/TN0064041"},"about":[{"label":"What it is","text":"Airports, Flying Fields, & Services (EPA's industry listing)"},{"label":"Where","text":"Nashville, Tennessee","href":"https://www.openstreetmap.org/?mlat=36.134569&mlon=-86.674603#map=14/36.134569/-86.674603"},{"label":"Last 12 months","text":"No values over a limit. 4 required values not reported. 7 of 42 reports filed late"},{"label":"Permit","text":"In force until Jul 31, 2030"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"TN","sic":"45","permits":3,"list":"https://passage-data.com/api/v1/permits?state=TN&sic=45","page":"https://passage-data.com/dmr/s/TN/45"},"limits_from_version":null,"record":{"last_filed":"2026-09-30","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"002","parameter":"Temperature, water deg. centigrade","parameter_code":"00010","statistic":"daily maximum","qualifier":null,"value":null,"unit":"deg C","report_only":true,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 002"},{"outfall":"002","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"minimum","qualifier":">=","value":"6","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"Monthly Reporting for Outfall 002"},{"outfall":"002","parameter":"pH","parameter_code":"00400","statistic":"daily 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