HATTTIESBURG LAUREL REGIONAL AIRPORT AUTHORITY

NPDES permit MS0031542 · Minor NON-POTW · effective, expires 2028-04-30 · 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

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

Last period with anything received: 2026-06-30. Most often over: BOD, 5-day, 20 deg. C (1), Nitrogen, ammonia total [as N] (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MS permits in EPA's filings — check your permit).

Limits in force (31)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001BOD, 5-day, 20 deg. CQRTR AVG <= 16 mg/L all year
001BOD, 5-day, 20 deg. CQB <= 24 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHQB <= 9 SU all year
001Solids, total suspendedQRTR AVG <= 30 mg/L all year
001Solids, total suspendedQB <= 45 mg/L all year
001Nitrogen, total [as N]QRTR AVG report only all year
001Nitrogen, total [as N]QB report only all year
001Nitrogen, total [as N]QRTR AVG report only all year
001Nitrogen, total [as N]QB report only all year
001Nitrogen, ammonia total [as N]QRTR AVG <= 1.37 mg/L all year
001Nitrogen, ammonia total [as N]QB <= 3 mg/L all year
001Nitrogen, Kjeldahl, total [as N]QRTR AVG report only all year
001Nitrogen, Kjeldahl, total [as N]QB report only all year
001Nitrogen, Kjeldahl, total [as N]QRTR AVG report only all year
001Nitrogen, Kjeldahl, total [as N]QB report only all year
001Nitrite + Nitrate total [as N]QRTR AVG report only all year
001Nitrite + Nitrate total [as N]QB report only all year
001Nitrite + Nitrate total [as N]QRTR AVG report only all year
001Nitrite + Nitrate total [as N]QB report only all year
001Phosphorus, total [as P]QRTR AVG report only all year
001Phosphorus, total [as P]QB report only all year
001Phosphorus, total [as P]QRTR AVG report only all year
001Phosphorus, total [as P]QB report only all year
001Flow, in conduit or thru treatment plantQRTR AVG <= .05 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualQRTR AVG <= .011 mg/L all year
001Chlorine, total residualQB <= .019 mg/L all year
001E. coliQRTR AVG <= 126 #/100mL all year
001E. coliQB <= 410 #/100mL 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