Metro Nashville Airport Authority

NPDES permit TN0064041 · Minor NON-POTW · effective, expires 2030-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
4required values missing, on 2 form(s)
7of 39 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (57)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. centigradeDAILY MX report only all year
002Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
002pHDAILY MN >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX report only all year
002Nitrogen, ammonia total [as N]MO AVG <= .9 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 1.7 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 2 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Oil and greaseMO AVG <= 10 mg/L all year
002Oil and greaseDAILY MX <= 15 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 3 mg/L May, Jun, Jul, Aug, Sep, Oct
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 37.5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 4.5 mg/L May, Jun, Jul, Aug, Sep, Oct
002Chemical Oxygen Demand [COD]DAILY MX report only all year
002LC50 Static 48Hr Acute Ceriodaphnia dubiaMINIMUM > 100 % Jan, Feb, Mar, Apr, Oct, Nov, Dec
002LC50 Static 48Hr Acute Pimephales promelasMINIMUM > 100 % Jan, Feb, Mar, Apr, Oct, Nov, Dec
003ApHDAILY MN >= 6 SU all year
003ApHMAXIMUM <= 9 SU all year
003ASolids, total suspendedDAILY MX <= 40 mg/L all year
003AOil and greaseDAILY MX <= 15 mg/L all year
003AFlow, in conduit or thru treatment plantMO AVG report only all year
003AFlow, in conduit or thru treatment plantDAILY MX report only all year
003ATotal Petroleum Hydrocarbons - DieselDAILY MX report only all year
003AChemical Oxygen Demand [COD]DAILY MX report only all year
003AXylene [mix of m+o+p]DAILY MX report only all year
003AOil and grease visualMO TOTAL report only all year
003ALC50 Static 48Hr Acute Ceriodaphnia dubiaMINIMUM > 100 % all year
003ALC50 Static 48Hr Acute Pimephales promelasMINIMUM > 100 % all year
004pHMAXIMUM report only all year
004Solids, total suspendedDAILY MX report only all year
004Oil and greaseDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
004Chemical Oxygen Demand [COD]DAILY MX report only all year
SW1BOD, 5-day, 20 deg. CDAILY MX report only all year
SW1pHMAXIMUM report only all year
SW1Solids, total suspendedDAILY MX report only all year
SW1Oil and greaseDAILY MX report only all year
SW1Flow, in conduit or thru treatment plantDAILY MX report only all year
SW1Chemical Oxygen Demand [COD]DAILY MX report only all year
SW2BOD, 5-day, 20 deg. CDAILY MX report only all year
SW2pHMAXIMUM report only all year
SW2Solids, total suspendedDAILY MX report only all year
SW2Oil and greaseDAILY MX report only all year
SW2Flow, in conduit or thru treatment plantDAILY MX report only all year
SW2Chemical Oxygen Demand [COD]DAILY MX report only all year
SW7BOD, 5-day, 20 deg. CDAILY MX report only all year
SW7pHMAXIMUM report only all year
SW7Solids, total suspendedDAILY MX report only all year
SW7Oil and greaseDAILY MX report only all year
SW7Flow, in conduit or thru treatment plantDAILY MX report only all year
SW7Chemical Oxygen Demand [COD]DAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states