City of Huntsville Water Pollution Control

NPDES permit AL0058394 · Major POTW · effective, expires 2027-02-28 · 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

1values over a limit
0required values missing, on 0 form(s)
0of 15 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, carb-5 day, 20 deg C, percent removal (1).

Reporting

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

Limits in force (78)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 10258 lb/d all year
001Solids, total suspendedWKLY AVG <= 15387 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 20 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 30 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG <= 6838 lb/d all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 10258 lb/d all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]WKLY AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]WKLY AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]WKLY AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]WKLY AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]WKLY AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]WKLY AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= 1 mg/L all year
001E. coliMO AVG <= 250 #/100mL May, Jun, Jul, Aug, Sep, Oct
001E. coliMO AVG <= 1050 #/100mL Jan, Feb, Mar, Apr, Nov, Dec
001E. coliDAILY MX <= 970 #/100mL May, Jun, Jul, Aug, Sep, Oct
001E. coliDAILY MX <= 5000 #/100mL Jan, Feb, Mar, Apr, Nov, Dec
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP <= 0 pass=0;fail=1 Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP <= 0 pass=0;fail=1 Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 37.5 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 8548 lb/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 12822 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
001BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
005pHDAILY MN report only all year
005pHDAILY MX report only all year
005Solids, total suspendedDAILY MX report only all year
005Oil & GreaseDAILY MX <= 15 mg/L all year
005Nitrogen, ammonia total [as N]DAILY MX report only all year
005Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
005Nitrite + Nitrate total [as N]DAILY MX report only all year
005Phosphorus, total [as P]DAILY MX report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005E. coliDAILY MX report only all year
005BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
006pHDAILY MN report only all year
006pHDAILY MX report only all year
006Solids, total suspendedDAILY MX report only all year
006Oil & GreaseDAILY MX <= 15 mg/L all year
006Nitrogen, ammonia total [as N]DAILY MX report only all year
006Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
006Nitrite + Nitrate total [as N]DAILY MX report only all year
006Phosphorus, total [as P]DAILY MX report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006E. coliDAILY MX report only all year
006BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
007pHDAILY MN report only all year
007pHDAILY MX report only all year
007Solids, total suspendedDAILY MX report only all year
007Oil & GreaseDAILY MX <= 15 mg/L all year
007Nitrogen, ammonia total [as N]DAILY MX report only all year
007Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
007Nitrite + Nitrate total [as N]DAILY MX report only all year
007Phosphorus, total [as P]DAILY MX report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007E. coliDAILY MX report only all year
007BOD, carbonaceous [5 day, 20 C]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