Cobb County Water System

NPDES permit GA0046761 · Major POTW · effective, expires 2027-12-31 · 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

3values over a limit
0required values missing, on 0 form(s)
3of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (3).

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 (51)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 5 mg/L all year
001Solids, total suspendedWKLY AVG <= 7.5 mg/L all year
001Solids, total suspendedMO AVG <= 500 lb/d all year
001Solids, total suspendedWKLY AVG <= 625 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, total [as N]MO AVG report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= .6 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= .9 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG <= 60 lb/d all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 75.1 lb/d all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG <= .16 mg/L all year
001Phosphorus, total [as P]WKLY AVG <= .2 mg/L all year
001Phosphorus, total [as P]MO AVG <= 16 lb/d all year
001Phosphorus, total [as P]WKLY AVG <= 20 lb/d all year
001Phosphate, ortho [as P]MO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG <= 12 MGD all year
001Flow, in conduit or thru treatment plantWKLY AVG <= 15 MGD all year
001Chlorine, total residualMAXIMUM <= .02 mg/L all year
001E. coliMOAV GEO <= 126 #/100mL all year
001E. coliWE <= 410 #/100mL all year
001Solids, sludge, total, dry weightMO TOTAL report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 3 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 4.5 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 300 lb/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 375 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, carbonaceous, percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiaMINIMUM report only all year
001Noel Statre 7Day Chronic PimephalesMINIMUM report only all year
002TurbidityMAXIMUM <= 3 NTU all year
002pHMINIMUM > 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 5 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantWKLY AVG report only all year
002E. coliMOAV GEO <= 20 #/100mL all year
002E. coliMAXIMUM <= 75 #/100mL all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 5 mg/L 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