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DeKalb County

Sewage treatment plant, major discharger, Lithonia, Georgia. NPDES permit GA0026816, in force until Mar 31, 2029. Last 12 months: over a limit 3 times (last November 2025), 14 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form 1 monthly (44 values), outfall FLO form FL monthly (1 value)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 21 of 30 reports late

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

Period endingParameterReportedLimitOver by
October 2025Phosphorus, total [as P], monthly average.31 mg/L≤ .3 mg/L3%
October 2025Phosphorus, total [as P], weekly average.5 mg/L≤ .45 mg/L11%
November 2025Phosphorus, total [as P], weekly average.46 mg/L≤ .45 mg/L2%

Limits in force (69)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LJan–Mar001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/LApr, May, Jun, Oct, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LJul–Sep001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/LOct–Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 37.5 mg/LJan–Mar001
BOD, 5-day, 20 deg. Cweekly average≤ 22.5 mg/LApr, May, Jun, Oct, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LJul–Sep001
BOD, 5-day, 20 deg. Cweekly average≤ 22.5 mg/LOct–Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 4170 lb/dJan–Mar001
BOD, 5-day, 20 deg. Cmonthly average≤ 2502 lb/dApr, May, Jun, Oct, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 1668 lb/dJul–Sep001
BOD, 5-day, 20 deg. Cmonthly average≤ 2502 lb/dOct–Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 5213 lb/dJan–Mar001
BOD, 5-day, 20 deg. Cweekly average≤ 3128 lb/dApr, May, Jun, Oct, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 2085 lb/dJul–Sep001
BOD, 5-day, 20 deg. Cweekly average≤ 3128 lb/dOct–Dec001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)all year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Solids, total suspendedweekly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 3336 lb/dall year001
Solids, total suspendedweekly average≤ 4170 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Solids, total suspendedweekly averagereport only (lb/d)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LJul–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LOct–Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LApr–Jun001
Nitrogen, ammonia total [as N]monthly average≤ 6.7 mg/LJan–Mar001
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LJul–Sep001
Nitrogen, ammonia total [as N]weekly average≤ 2.7 mg/LOct–Dec001
Nitrogen, ammonia total [as N]weekly average≤ 3.3 mg/LApr–Jun001
Nitrogen, ammonia total [as N]weekly average≤ 10.1 mg/LJan–Mar001
Nitrogen, ammonia total [as N]monthly average≤ 217 lb/dJul–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 300 lb/dOct–Dec001
Nitrogen, ammonia total [as N]monthly average≤ 367 lb/dApr–Jun001
Nitrogen, ammonia total [as N]monthly average≤ 1118 lb/dJan–Mar001
Nitrogen, ammonia total [as N]weekly average≤ 271 lb/dJul–Sep001
Nitrogen, ammonia total [as N]weekly average≤ 375 lb/dOct–Dec001
Nitrogen, ammonia total [as N]weekly average≤ 459 lb/dApr–Jun001
Nitrogen, ammonia total [as N]weekly average≤ 1397 lb/dJan–Mar001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ .3 mg/Lall year001
Phosphorus, total [as P]weekly average≤ .45 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 50 lb/dall year001
Phosphorus, total [as P]weekly average≤ 63 lb/dall year001
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly average≤ 20 MGDall year001
Flow, in conduit or thru treatment plantweekly average≤ 25 MGDall year001
Chlorine, total residualmaximum≤ .01 mg/Lall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. coliweekly geometric mean≤ 410 #/100mLall year001
Solids, sludge, total, dry weightmonthly totalreport only (dry ton)all year001
BOD, 5-day, percent removalminimum≥ 85 %all year001
Solids, suspended percent removalminimum≥ 85 %all year001
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year001
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year001
Flow, in conduit or thru treatment plantmonthly average≤ 56 MGDall yearFLO

How strict are these limits?

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

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