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City of Mansfield

Sewage treatment plant, Mansfield, Georgia. NPDES permit GA0047759, in force until Dec 31, 2028. Last 12 months: over a limit 10 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 46 days after each period: form B1 monthly (40 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
February 2026BOD, 5-day, 20 deg. C, monthly average20.7 mg/L≤ 20 mg/L4%
February 2026BOD, 5-day, 20 deg. C, weekly average13.6 lb/d≤ 12.5 lb/d9%
February 2026BOD, 5-day, 20 deg. C, weekly average40.8 mg/L≤ 30 mg/L36%
February 2026Nitrogen, ammonia total [as N], monthly average10.3 mg/L≤ 8 mg/L29%
February 2026Nitrogen, ammonia total [as N], weekly average18.5 mg/L≤ 12 mg/L54%
February 2026Nitrogen, ammonia total [as N], weekly average6.2 lb/d≤ 5 lb/d24%
March 2026BOD, 5-day, 20 deg. C, weekly average36.3 mg/L≤ 30 mg/L21%
March 2026Nitrogen, ammonia total [as N], monthly average9.1 mg/L≤ 8 mg/L14%
March 2026Nitrogen, ammonia total [as N], weekly average20.9 mg/L≤ 12 mg/L74%
March 2026Nitrogen, ammonia total [as N], weekly average6.8 lb/d≤ 5 lb/d36%

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 12.5 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≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 15 lb/dall year
Solids, total suspendedweekly average≤ 18.8 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≤ 8 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 12 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 4 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 5 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≤ 5 mg/Lall year
Phosphorus, total [as P]weekly average≤ 7.5 mg/Lall year
Phosphorus, total [as P]monthly average≤ 2.5 lb/dall year
Phosphorus, total [as P]weekly average≤ 3.1 lb/dall year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .06 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ .075 MGDall year
Chlorine, total residualmaximum≤ .02 mg/Lall year
E. colimonthly geometric mean≤ 126 CFU/100mLall year
E. coliweekly geometric mean≤ 410 CFU/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

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/GA0047759 · MCP: https://passage-data.com/mcp