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Unified Government of Athens-Clarke County

Sewage treatment plant, major discharger, Athens, Georgia. NPDES permit GA0021733, in force until Jan 31, 2031. Last 12 months: no values over a limit, 4 required values missing, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form 1 monthly (40 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 834 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 1043 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 1668 lb/dall year
Solids, total suspendedweekly average≤ 2085 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 167 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 209 lb/dall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]weekly average≤ 1.5 mg/Lall year
Phosphorus, total [as P]monthly average≤ 83 lb/dall year
Phosphorus, total [as P]weekly average≤ 104 lb/dall year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 10 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ 12.5 MGDall year
Chlorine, total residualmaximum≤ .03 mg/Lall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. coliweekly geometric mean≤ 410 #/100mLall year
Solids, sludge, total, dry weightmonthly totalreport only (dry ton)all year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year

New limits from Feb 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Phosphorus, total [as P], monthly average0.5 mg/Ltighter0.255 mg/L (12 values)0.51×
Phosphorus, total [as P], monthly average42 lb/dtighter6.155 lb/d (12 values)0.147×
Phosphorus, total [as P], weekly average0.75 mg/Ltighter0.425 mg/L (12 values)0.567×
Phosphorus, total [as P], weekly average52 lb/dtighter10.16 lb/d (12 values)0.195×

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/GA0021733 · MCP: https://passage-data.com/mcp