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Madison, City of

Sewage treatment plant, major discharger, Madison, Georgia. NPDES permit GA0038741, in force until Nov 30, 2029. Last 12 months: over a limit 11 times (last August 2026), 12 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 (52 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
17 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
November 2025Nitrogen, ammonia total [as N], weekly average5.3 mg/L≤ 4.8 mg/L10%
March 2026Nitrogen, ammonia total [as N], weekly average16.9 mg/L≤ 4.8 mg/L252%
March 2026Solids, suspended percent removal, minimum84 %≥ 85 %7%
April 2026Nitrogen, ammonia total [as N], monthly average3.49 mg/L≤ 3.2 mg/L9%
April 2026Nitrogen, ammonia total [as N], weekly average13.37 mg/L≤ 4.8 mg/L179%
May 2026Copper, total recoverable, monthly average11 ug/L≤ 7.4 ug/L49%
May 2026Copper, total recoverable, weekly average11 ug/L≤ 9.7 ug/L13%
July 2026E. coli, weekly geometric mean> 250 #/100mL≤ 410 #/100mL—
July 2026Phosphorus, total [as P], weekly average2.7 mg/L≤ 1.5 mg/L80%
August 2026Phosphorus, total [as P], monthly average1.1 mg/L≤ 1 mg/L10%
August 2026Phosphorus, total [as P], weekly average2.4 mg/L≤ 1.5 mg/L60%

Limits in force (64)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 3.6 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 5.4 mg/LMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 30 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 83 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 38 lb/dMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 104 lb/dJan, Feb, Mar, Apr, Nov, Dec
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/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 20 mg/LMay–Oct
Solids, total suspendedweekly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 30 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 167 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 83 lb/dMay–Oct
Solids, total suspendedweekly average≤ 209 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 104 lb/dMay–Oct
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≤ 3.2 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 4.8 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 27 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 8.3 lb/dMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 33 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 10 lb/dMay–Oct
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≤ 8.3 lb/dall year
Phosphorus, total [as P]weekly average≤ 10.4 lb/dall year
Zinc, total recoverablemonthly average≤ 114.8 ug/Lall year
Zinc, total recoverableweekly average≤ 114.8 ug/Lall year
Zinc, total recoverablemonthly average≤ .957 lb/dall year
Zinc, total recoverableweekly average≤ .957 lb/dall year
Copper, total recoverablemonthly average≤ 7.4 ug/Lall year
Copper, total recoverableweekly average≤ 9.7 ug/Lall year
Copper, total recoverablemonthly average≤ .062 lb/dall year
Copper, total recoverableweekly average≤ .081 lb/dall year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 1 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ 1.25 MGDall year
Chlorine, total residualmaximum≤ .01 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 Dec 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Phosphorus, total [as P], monthly average0.5 mg/Ltighter0.55 mg/L (12 values)1.1×
Phosphorus, total [as P], weekly average0.75 mg/Ltighter0.9 mg/L (12 values)1.2×
Phosphorus, total [as P], monthly average4.2 lb/dtighter0.95 lb/d (12 values)0.226×
Phosphorus, total [as P], weekly average5.2 lb/dtighter1.305 lb/d (12 values)0.251×

How strict are these limits?

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

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