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City of Atlanta

Sewage treatment plant, major discharger, Atlanta, Georgia. NPDES permit GA0039012, in force until Dec 31, 2028. Last 12 months: over a limit 43 times (last May 2026), 3 of 60 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall CLAY form 1 monthly (51 values), outfall CLAY form 2 monthly (2 values), outfall SORV form 1 monthly (50 values), outfall SUM form 1 monthly (6 values), outfall UTOY form 1 monthly (50 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
47 values over a limit, 0 required values missing, 2 of 60 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 43 values over a limit
Period endingOutfallParameterReportedLimitOver by
November 2025CLAYPhosphorus, total [as P], monthly average.7 mg/L≤ .5 mg/L40%
November 2025CLAYPhosphorus, total [as P], weekly average1.15 mg/L≤ .75 mg/L53%
November 2025SUMPhosphorus, total [as P], monthly average484 lb/d≤ 472 lb/d3%
November 2025SUMPhosphorus, total [as P], weekly average747 lb/d≤ 590 lb/d27%
December 2025CLAYPhosphorus, total [as P], monthly average.67 mg/L≤ .5 mg/L34%
December 2025CLAYPhosphorus, total [as P], weekly average1.97 mg/L≤ .75 mg/L163%
December 2025SORVChemical Oxygen Demand [COD], monthly average19149 lb/d≤ 18014 lb/d6%
December 2025SORVChemical Oxygen Demand [COD], monthly average99 mg/L≤ 45 mg/L120%
December 2025SUMPhosphorus, total [as P], monthly average492 lb/d≤ 472 lb/d4%
December 2025SUMPhosphorus, total [as P], weekly average1367 lb/d≤ 590 lb/d132%
January 2026CLAYNitrogen, ammonia total [as N], monthly average3.61 mg/L≤ 1.8 mg/L101%
January 2026CLAYNitrogen, ammonia total [as N], weekly average9.06 mg/L≤ 2.7 mg/L236%
January 2026CLAYPhosphorus, total [as P], monthly average.56 mg/L≤ .5 mg/L12%
January 2026CLAYPhosphorus, total [as P], weekly average1.35 mg/L≤ .75 mg/L80%
January 2026SORVChemical Oxygen Demand [COD], weekly average420 mg/L≤ 67.5 mg/L522%
January 2026SORVChemical Oxygen Demand [COD], weekly average79198 lb/d≤ 22518 lb/d252%
January 2026SORVOxygen, dissolved [DO], minimum5 mg/L≥ 6 mg/L17%
January 2026SUMNitrogen, ammonia total [as N], monthly average2611 lb/d≤ 1565 lb/d67%
January 2026SUMNitrogen, ammonia total [as N], weekly average6190 lb/d≤ 1956 lb/d216%
January 2026SUMPhosphorus, total [as P], weekly average928 lb/d≤ 590 lb/d57%
February 2026CLAYNitrogen, ammonia total [as N], monthly average2.34 mg/L≤ 1.8 mg/L30%
February 2026CLAYNitrogen, ammonia total [as N], weekly average7.15 mg/L≤ 2.7 mg/L165%
February 2026CLAYPhosphorus, total [as P], monthly average.57 mg/L≤ .5 mg/L14%
February 2026CLAYPhosphorus, total [as P], weekly average1.12 mg/L≤ .75 mg/L49%
February 2026CLAYSolids, total suspended, monthly average10.3 mg/L≤ 10 mg/L3%
February 2026CLAYSolids, total suspended, monthly average10202 lb/d≤ 8340 lb/d22%
February 2026CLAYSolids, total suspended, weekly average34.7 mg/L≤ 15 mg/L131%
February 2026CLAYSolids, total suspended, weekly average36840 lb/d≤ 10425 lb/d253%
February 2026SUMNitrogen, ammonia total [as N], monthly average1735 lb/d≤ 1565 lb/d11%
February 2026SUMNitrogen, ammonia total [as N], weekly average4736 lb/d≤ 1956 lb/d142%
February 2026SUMPhosphorus, total [as P], monthly average554 lb/d≤ 472 lb/d17%
February 2026SUMPhosphorus, total [as P], weekly average1267 lb/d≤ 590 lb/d115%
March 2026CLAYNitrogen, ammonia total [as N], weekly average3.84 mg/L≤ 2.7 mg/L42%
March 2026SORVNitrogen, ammonia total [as N], weekly average3.47 mg/L≤ 2.7 mg/L29%
March 2026SORVPhosphorus, total [as P], weekly average1 mg/L≤ .75 mg/L33%
March 2026SORVSolids, total suspended, weekly average20 mg/L≤ 15 mg/L33%
March 2026SORVSolids, total suspended, weekly average5885 lb/d≤ 5004 lb/d18%
March 2026SORVpH, maximum10.7 SU≤ 9 SU—
March 2026SUMNitrogen, ammonia total [as N], weekly average2767 lb/d≤ 1460 lb/d90%
May 2026CLAYNitrogen, ammonia total [as N], monthly average2.48 mg/L≤ 1.8 mg/L38%
May 2026CLAYNitrogen, ammonia total [as N], weekly average5.04 mg/L≤ 2.7 mg/L87%
May 2026SUMNitrogen, ammonia total [as N], monthly average1591 lb/d≤ 1168 lb/d36%
May 2026SUMNitrogen, ammonia total [as N], weekly average3029 lb/d≤ 1460 lb/d107%

Limits in force (171)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitaveragereport only (deg F)all yearCLAY
Temperature, water deg. fahrenheitaveragereport only (deg F)all yearCLAY
Temperature, water deg. fahrenheitaveragereport only (deg F)all yearCLAY
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall yearCLAY
pHminimum≥ 6 SUall yearCLAY
pHmaximum≤ 9 SUall yearCLAY
Solids, total suspendedmonthly average≤ 10 mg/Lall yearCLAY
Solids, total suspendedweekly average≤ 15 mg/Lall yearCLAY
Solids, total suspendedmonthly average≤ 8340 lb/dall yearCLAY
Solids, total suspendedweekly average≤ 10425 lb/dall yearCLAY
Solids, total suspendedmonthly averagereport only (mg/L)all yearCLAY
Solids, total suspendedweekly averagereport only (mg/L)all yearCLAY
Solids, total suspendedmonthly averagereport only (lb/d)all yearCLAY
Solids, total suspendedweekly averagereport only (lb/d)all yearCLAY
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearCLAY
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all yearCLAY
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/Lall yearCLAY
Nitrogen, ammonia total [as N]weekly average≤ 2.7 mg/Lall yearCLAY
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all yearCLAY
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)all yearCLAY
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearCLAY
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearCLAY
Phosphorus, total [as P]monthly average≤ .5 mg/Lall yearCLAY
Phosphorus, total [as P]weekly average≤ .75 mg/Lall yearCLAY
Phosphorus, total [as P]monthly averagereport only (lb/d)all yearCLAY
Phosphorus, total [as P]weekly averagereport only (lb/d)all yearCLAY
Phosphate, ortho [as P]monthly averagereport only (mg/L)all yearCLAY
Flow, in conduit or thru treatment plantmonthly average≤ 100 MGDall yearCLAY
Flow, in conduit or thru treatment plantweekly average≤ 125 MGDall yearCLAY
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearCLAY
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all yearCLAY
Chlorine, total residualmaximum≤ .06 mg/Lall yearCLAY
E. colimonthly geometric mean≤ 126 #/100mLall yearCLAY
E. coliweekly geometric mean≤ 410 #/100mLall yearCLAY
Solids, sludge, total, dry weightmonthly totalreport only (dry ton)all yearCLAY
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.2 mg/Lall yearCLAY
BOD, carbonaceous [5 day, 20 C]weekly average≤ 12.3 mg/Lall yearCLAY
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all yearCLAY
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all yearCLAY
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearCLAY
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all yearCLAY
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all yearCLAY
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all yearCLAY
BOD, carbonaceous, percent removalminimum≥ 85 %all yearCLAY
Solids, suspended percent removalminimum≥ 85 %all yearCLAY
Chemical Oxygen Demand [COD]monthly average≤ 45 mg/Lall yearCLAY
Chemical Oxygen Demand [COD]weekly average≤ 67.5 mg/Lall yearCLAY
Chemical Oxygen Demand [COD]monthly average≤ 37530 lb/dall yearCLAY
Chemical Oxygen Demand [COD]weekly average≤ 46913 lb/dall yearCLAY
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all yearCLAY
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all yearCLAY
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all yearCLAY
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all yearCLAY
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall yearSORV
pHminimum≥ 6 SUall yearSORV
pHmaximum≤ 9 SUall yearSORV
Solids, total suspendedmonthly average≤ 10 mg/Lall yearSORV
Solids, total suspendedweekly average≤ 15 mg/Lall yearSORV
Solids, total suspendedmonthly average≤ 4003 lb/dall yearSORV
Solids, total suspendedweekly average≤ 5004 lb/dall yearSORV
Solids, total suspendedmonthly averagereport only (mg/L)all yearSORV
Solids, total suspendedweekly averagereport only (mg/L)all yearSORV
Solids, total suspendedmonthly averagereport only (lb/d)all yearSORV
Solids, total suspendedweekly averagereport only (lb/d)all yearSORV
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearSORV
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all yearSORV
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/Lall yearSORV
Nitrogen, ammonia total [as N]weekly average≤ 2.7 mg/Lall yearSORV
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all yearSORV
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)all yearSORV
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearSORV
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearSORV
Phosphorus, total [as P]monthly average≤ .5 mg/Lall yearSORV
Phosphorus, total [as P]weekly average≤ .75 mg/Lall yearSORV
Phosphorus, total [as P]monthly averagereport only (lb/d)all yearSORV
Phosphorus, total [as P]weekly averagereport only (lb/d)all yearSORV
Phosphate, ortho [as P]monthly averagereport only (mg/L)all yearSORV
Flow, in conduit or thru treatment plantmonthly average≤ 48 MGDall yearSORV
Flow, in conduit or thru treatment plantweekly average≤ 60 MGDall yearSORV
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSORV
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all yearSORV
Chlorine, total residualmaximum≤ .08 mg/Lall yearSORV
E. colimonthly geometric mean≤ 126 #/100mLall yearSORV
E. coliweekly geometric mean≤ 410 #/100mLall yearSORV
Solids, sludge, total, dry weightmonthly totalreport only (dry ton)all yearSORV
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.2 mg/Lall yearSORV
BOD, carbonaceous [5 day, 20 C]weekly average≤ 12.3 mg/Lall yearSORV
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all yearSORV
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all yearSORV
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearSORV
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all yearSORV
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all yearSORV
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all yearSORV
BOD, carbonaceous, percent removalminimum≥ 85 %all yearSORV
Solids, suspended percent removalminimum≥ 85 %all yearSORV
Chemical Oxygen Demand [COD]monthly average≤ 45 mg/Lall yearSORV
Chemical Oxygen Demand [COD]weekly average≤ 67.5 mg/Lall yearSORV
Chemical Oxygen Demand [COD]monthly average≤ 18014 lb/dall yearSORV
Chemical Oxygen Demand [COD]weekly average≤ 22518 lb/dall yearSORV
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all yearSORV
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all yearSORV
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all yearSORV
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all yearSORV
Nitrogen, ammonia total [as N]monthly average≤ 1565 lb/dJan, Feb, DecSUM
Nitrogen, ammonia total [as N]monthly average≤ 992 lb/dSep–NovSUM
Nitrogen, ammonia total [as N]monthly average≤ 771 lb/dJun–AugSUM
Nitrogen, ammonia total [as N]monthly average≤ 1168 lb/dMar–MaySUM
Nitrogen, ammonia total [as N]weekly average≤ 1956 lb/dJan, Feb, DecSUM
Nitrogen, ammonia total [as N]weekly average≤ 1240 lb/dSep–NovSUM
Nitrogen, ammonia total [as N]weekly average≤ 964 lb/dJun–AugSUM
Nitrogen, ammonia total [as N]weekly average≤ 1460 lb/dMar–MaySUM
Phosphorus, total [as P]monthly average≤ 472 lb/dall yearSUM
Phosphorus, total [as P]weekly average≤ 590 lb/dall yearSUM
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6105 lb/dSep–NovSUM
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5488 lb/dJun–AugSUM
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6414 lb/dMar–MaySUM
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6899 lb/dJan, Feb, DecSUM
BOD, carbonaceous [5 day, 20 C]weekly average≤ 7631 lb/dSep–NovSUM
BOD, carbonaceous [5 day, 20 C]weekly average≤ 6860 lb/dJun–AugSUM
BOD, carbonaceous [5 day, 20 C]weekly average≤ 8017 lb/dMar–MaySUM
BOD, carbonaceous [5 day, 20 C]weekly average≤ 8623 lb/dJan, Feb, DecSUM
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall yearUTOY
pHminimum≥ 6 SUall yearUTOY
pHmaximum≤ 9 SUall yearUTOY
Solids, total suspendedmonthly average≤ 10 mg/Lall yearUTOY
Solids, total suspendedweekly average≤ 15 mg/Lall yearUTOY
Solids, total suspendedmonthly average≤ 3336 lb/dall yearUTOY
Solids, total suspendedweekly average≤ 4170 lb/dall yearUTOY
Solids, total suspendedmonthly averagereport only (mg/L)all yearUTOY
Solids, total suspendedweekly averagereport only (mg/L)all yearUTOY
Solids, total suspendedmonthly averagereport only (lb/d)all yearUTOY
Solids, total suspendedweekly averagereport only (lb/d)all yearUTOY
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearUTOY
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all yearUTOY
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/Lall yearUTOY
Nitrogen, ammonia total [as N]weekly average≤ 2.7 mg/Lall yearUTOY
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all yearUTOY
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)all yearUTOY
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearUTOY
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearUTOY
Phosphorus, total [as P]monthly average≤ .5 mg/Lall yearUTOY
Phosphorus, total [as P]weekly average≤ .75 mg/Lall yearUTOY
Phosphorus, total [as P]monthly averagereport only (lb/d)all yearUTOY
Phosphorus, total [as P]weekly averagereport only (lb/d)all yearUTOY
Phosphate, ortho [as P]monthly averagereport only (mg/L)all yearUTOY
Flow, in conduit or thru treatment plantmonthly average≤ 40 MGDall yearUTOY
Flow, in conduit or thru treatment plantweekly average≤ 50 MGDall yearUTOY
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearUTOY
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all yearUTOY
Chlorine, total residualmaximum≤ .08 mg/Lall yearUTOY
E. colimonthly geometric mean≤ 126 #/100mLall yearUTOY
E. coliweekly geometric mean≤ 410 #/100mLall yearUTOY
Solids, sludge, total, dry weightmonthly totalreport only (dry ton)all yearUTOY
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.2 mg/Lall yearUTOY
BOD, carbonaceous [5 day, 20 C]weekly average≤ 12.3 mg/Lall yearUTOY
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all yearUTOY
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all yearUTOY
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearUTOY
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all yearUTOY
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all yearUTOY
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all yearUTOY
BOD, carbonaceous, percent removalminimum≥ 85 %all yearUTOY
Solids, suspended percent removalminimum≥ 85 %all yearUTOY
Chemical Oxygen Demand [COD]monthly average≤ 45 mg/Lall yearUTOY
Chemical Oxygen Demand [COD]weekly average≤ 67.5 mg/Lall yearUTOY
Chemical Oxygen Demand [COD]monthly average≤ 15012 lb/dall yearUTOY
Chemical Oxygen Demand [COD]weekly average≤ 18765 lb/dall yearUTOY
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all yearUTOY
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all yearUTOY
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all yearUTOY
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all yearUTOY

How strict are these limits?

Cited limits by parameter: Georgia's rules and the federal ones.

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