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City of St Marys

Sewage treatment plant, Saint Marys, Georgia. NPDES permit GA0037931 expired Jan 31, 2025; its limits still apply. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form 1 monthly (41 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 (45)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 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≤ 18.9 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 23.7 kg/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 (kg/d)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (kg/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 8 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 57 kg/dall year
Solids, total suspendedweekly average≤ 71 kg/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 (kg/d)all year
Solids, total suspendedweekly averagereport only (kg/d)all year
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ .5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ .75 mg/LMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .95 kg/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.9 kg/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 1.2 kg/dMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 2.4 kg/dJan, Feb, Mar, Apr, Nov, Dec
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 averagereport only (mg/L)all year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Nitrogen, total Kjeldahlmonthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .5 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ .625 MGDall year
Chlorine, total residualmaximum≤ .01 mg/Lall year
Mercury, total recoverablemonthly averagereport only (ug/L)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/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
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year
Noel Statre 7Day Chronic Pimephalesminimumreport only (%)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/GA0037931 · MCP: https://passage-data.com/mcp