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City of Savannah

Sewage treatment plant, major discharger, Savannah, Georgia. NPDES permit GA0020427 expired Apr 30, 2024; its limits still apply. Last 12 months: over a limit 3 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 46 days after each period: form B1 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

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, ammonia total [as N], monthly average7.64 mg/L≤ 4 mg/L91%
December 2025Nitrogen, ammonia total [as N], weekly average132.4 kg/d≤ 78.5 kg/d69%
December 2025Nitrogen, ammonia total [as N], weekly average20.37 mg/L≤ 6 mg/L240%

Limits in force (45)

ParameterStatisticLimitMonths
Oxygen demand, ultimatemonthly average≤ 2043 lb/dMar–Oct
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedweekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 152 kg/dall year
Solids, total suspendedweekly average≤ 190 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≤ 4 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 6 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 3 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 60.6 kg/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 30.3 kg/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 78.5 kg/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 37.9 kg/dMar–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≤ .5 mg/Lall year
Phosphorus, total [as P]weekly average≤ .75 mg/Lall year
Phosphorus, total [as P]monthly average≤ 7.6 kg/dall year
Phosphorus, total [as P]weekly average≤ 9.5 kg/dall year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 4 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ 5 MGDall 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, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 151.6 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 189.5 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (kg/d)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (kg/d)all year
BOD, carbonaceous, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
LC50 Static 96Hr Acute Mysid. Bahiaminimumreport only (%)all year
LC50 Static 96Hr Acute Menidiaminimumreport 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/GA0020427 · MCP: https://passage-data.com/mcp