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City of Madison

Sewage treatment plant, Madison, Georgia. NPDES permit GA0023141, in force until Nov 30, 2029. Last 12 months: over a limit 4 times (last September 2026), 6 required values missing, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 46 days after each period: form B1 monthly (37 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
15 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025pH, minimum5.8 SU≥ 6 SU—
July 2026Chlorine, total residual, daily maximum.03 mg/L≤ .013 mg/L131%
August 2026Chlorine, total residual, daily maximum.02 mg/L≤ .013 mg/L54%
September 2026Chlorine, total residual, daily maximum.02 mg/L≤ .013 mg/L54%

Limits in force (37)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 37.5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 138 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 172 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
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 110 lb/dall year
Solids, total suspendedweekly average≤ 138 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)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≤ 2.5 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 3.8 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 17 lb/dall year
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .66 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ .83 MGDall year
Chlorine, total residualdaily maximum≤ .013 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

New limits from Dec 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Phosphorus, total [as P], monthly average0.76 mg/Lnew3.8 mg/L (11 values)5×
Phosphorus, total [as P], monthly average4.2 lb/dnew——
Phosphorus, total [as P], weekly average1.1 mg/Lnew——
Phosphorus, total [as P], weekly average5.2 lb/dnew——

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/GA0023141 · MCP: https://passage-data.com/mcp