Clayton County Water Authority

NPDES permit GA0038423 · Major POTW · administratively continued, expires 2026-02-28 · 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.

This permit expired on 2026-02-28 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
8of 98 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 (117)

OutfallParameterStatisticLimitMonths
000Temperature, water deg. fahrenheitMO MIN report only May, Jun, Jul, Aug, Sep, Oct
000Temperature, water deg. fahrenheitMO AVG report only May, Jun, Jul, Aug, Sep, Oct
000Temperature, water deg. fahrenheitMO MAX report only May, Jun, Jul, Aug, Sep, Oct
000Oxygen, dissolved [DO]DAILY MN report only May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY AVG report only all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY AVG report only 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
001Flow, in conduit or thru treatment plantMO AVG <= 24 MGD all year
001Flow, in conduit or thru treatment plantWKLY AVG <= 30 MGD all year
002BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 660 kg/d all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 825 kg/d all year
002Solids, total suspendedMO AVG <= 15 mg/L all year
002Solids, total suspendedWKLY AVG <= 22.5 mg/L all year
002Solids, total suspendedMO AVG <= 989 kg/d all year
002Solids, total suspendedWKLY AVG <= 1237 kg/d all year
002Nitrogen, organic total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]MO AVG <= 1.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]MO AVG <= .5 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]WKLY AVG <= 2.1 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]WKLY AVG <= .75 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 92.3 kg/d Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]MO AVG <= 33 kg/d May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]WKLY AVG <= 115.4 kg/d Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]WKLY AVG <= 41.2 kg/d May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
002Nitrite + Nitrate total [as N]MO AVG report only all year
002Phosphorus, total [as P]ANNL AVG <= .6 mg/L all year
002Phosphorus, total [as P]MO AVG <= .75 mg/L all year
002Phosphorus, total [as P]MO AVG <= .38 mg/L all year
002Phosphorus, total [as P]WKLY AVG <= 1.13 mg/L all year
002Phosphorus, total [as P]WKLY AVG <= .57 mg/L all year
002Phosphorus, total [as P]MO AVG <= 49 kg/d all year
002Phosphorus, total [as P]MO AVG <= 25 kg/d all year
002Phosphorus, total [as P]WKLY AVG <= 62 kg/d all year
002Phosphorus, total [as P]WKLY AVG <= 31 kg/d all year
002Phosphate, ortho [as P]MO AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG <= 17.4 MGD all year
002Flow, in conduit or thru treatment plantWKLY AVG <= 21.8 MGD all year
002Coliform, fecal generalMOAV GEO <= 100 #/100mL all year
002Coliform, fecal generalWE <= 200 #/100mL all year
002BOD, 5-day, percent removalMO MIN >= 85 % all year
002Solids, suspended percent removalMINIMUM >= 85 % all year
002NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiaMINIMUM report only all year
002Noel Statre 7Day Chronic PimephalesMINIMUM report only all year
003Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
003BOD, 5-day, 20 deg. CMO AVG <= 8 mg/L all year
003BOD, 5-day, 20 deg. CWKLY AVG <= 12 mg/L all year
003BOD, 5-day, 20 deg. CMO AVG <= 200 kg/d all year
003BOD, 5-day, 20 deg. CWKLY AVG <= 250 kg/d all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 8.5 SU all year
003Solids, total suspendedMO AVG <= 15 mg/L all year
003Solids, total suspendedWKLY AVG <= 23 mg/L all year
003Solids, total suspendedMO AVG <= 375 kg/d all year
003Solids, total suspendedWKLY AVG <= 469 kg/d all year
003Nitrogen, organic total [as N]MO AVG report only all year
003Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L all year
003Nitrogen, ammonia total [as N]WKLY AVG <= 3 mg/L all year
003Nitrogen, ammonia total [as N]MO AVG <= 50 kg/d all year
003Nitrogen, ammonia total [as N]WKLY AVG <= 63 kg/d all year
003Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
003Nitrite + Nitrate total [as N]MO AVG report only all year
003Phosphorus, total [as P]MO AVG <= .3 mg/L all year
003Phosphorus, total [as P]WKLY AVG <= .45 mg/L all year
003Phosphorus, total [as P]MO AVG <= 7.5 kg/d all year
003Phosphorus, total [as P]WKLY AVG <= 9.4 kg/d all year
003Phosphate, ortho [as P]MO AVG report only all year
003Flow, in conduit or thru treatment plantMO AVG <= 6.6 MGD all year
003Flow, in conduit or thru treatment plantWKLY AVG <= 8.3 MGD all year
003Chlorine, total residualDAILY MX <= .01 mg/L all year
003Coliform, fecal generalMOAV GEO <= 200 #/100mL all year
003Coliform, fecal generalWKLY AVG <= 400 #/100mL all year
003Solids, sludge, total, dry weightMO TOTAL report only all year
003BOD, 5-day, percent removalMINIMUM >= 85 % all year
003Solids, suspended percent removalMINIMUM >= 85 % all year
003NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiaMINIMUM report only all year
003Noel Statre 7Day Chronic PimephalesMINIMUM report only all year
004Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 8.5 SU all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantWKLY AVG report only all year
004Chlorine, total residualDAILY MX <= .011 mg/L all year
005Temperature, water deg. fahrenheitMINIMUM report only May, Jun, Jul, Aug, Sep, Oct
005Temperature, water deg. fahrenheitMAXIMUM report only May, Jun, Jul, Aug, Sep, Oct
005Oxygen, dissolved [DO]MINIMUM report only May, Jun, Jul, Aug, Sep, Oct
006Phosphorus, total [as P]MO MIN report only all year
006Phosphorus, total [as P]MO AVG report only all year
006Phosphorus, total [as P]MO MAX report only all year
006Flow, in conduit or thru treatment plantMO MIN report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantMO MAX report only all year
007Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
007pHMINIMUM >= 6 SU all year
007pHMAXIMUM <= 8.5 SU all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantWKLY AVG report only all year
007Chlorine, total residualDAILY MX <= .011 mg/L all year
008Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
008pHMINIMUM >= 6 SU all year
008pHMAXIMUM <= 8.5 SU all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantWKLY AVG report only all year
008Chlorine, total residualDAILY MX <= .011 mg/L all year
009Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
009pHMINIMUM >= 6 SU all year
009pHMAXIMUM <= 8.5 SU all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Flow, in conduit or thru treatment plantWKLY AVG report only all year
009Chlorine, total residualDAILY MX <= .011 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