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Unified Government of Athens-Clarke County

Sewage treatment plant, major discharger, Athens, Georgia. NPDES permit GA0021725, in force until Jan 31, 2031. Last 12 months: over a limit 4 times (last February 2026), 4 required values missing, 1 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form 01 monthly (41 values), outfall 003 form 03 monthly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
February 2026Phosphorus, total [as P], weekly average1.86 mg/L≤ 1.5 mg/L24%
February 2026Solids, total suspended, monthly average11 mg/L≤ 10 mg/L10%
February 2026Solids, total suspended, weekly average3351 lb/d≤ 1460 lb/d130%
February 2026Solids, total suspended, weekly average42 mg/L≤ 15 mg/L180%

Limits in force (42)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 8 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 12 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 934 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 1168 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 10 mg/Lall year001
Solids, total suspendedweekly average≤ 15 mg/Lall year001
Solids, total suspendedmonthly average≤ 1168 lb/dall year001
Solids, total suspendedweekly average≤ 1460 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)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≤ 2 mg/Lall year001
Nitrogen, ammonia total [as N]weekly average≤ 3 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 234 lb/dall year001
Nitrogen, ammonia total [as N]weekly average≤ 292 lb/dall year001
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≤ 1 mg/Lall year001
Phosphorus, total [as P]weekly average≤ 1.5 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 117 lb/dall year001
Phosphorus, total [as P]weekly average≤ 146 lb/dall year001
Copper, total recoverablemonthly averagereport only (ug/L)all year001
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly average≤ 14 MGDall year001
Flow, in conduit or thru treatment plantweekly average≤ 17.5 MGDall year001
Chlorine, total residualmaximum≤ .03 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
Hardness, total [as CaCO3]monthly minimumreport only (mg/L)all year003

New limits from Feb 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Phosphorus, total [as P], monthly average0.5 mg/Ltighter0.145 mg/L (12 values)0.29×
Phosphorus, total [as P], monthly average58.4 lb/dtighter7.342 lb/d (12 values)0.126×
Phosphorus, total [as P], weekly average73 lb/dtighter16.95 lb/d (12 values)0.232×
Phosphorus, total [as P], weekly average0.75 mg/Ltighter0.3 mg/L (12 values)0.4×

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/GA0021725 · MCP: https://passage-data.com/mcp