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Cobb County Water System

Sewage treatment plant, major discharger, Smyrna, Georgia. NPDES permit GA0026140, in force until Feb 28, 2027. 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 B1 monthly (48 values)
Renewal application due
Sep 1, 2026 · 180 days before expiry; your permit may set another date
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 (48)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly minimumreport only (deg F)all year
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Temperature, water deg. fahrenheitmonthly maximumreport only (deg F)all year
Oxygen, dissolved [DO]minimum≥ 7 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 5 mg/Lall year
Solids, total suspendedweekly average≤ 7.5 mg/Lall year
Solids, total suspendedmonthly average≤ 2085 lb/dall year
Solids, total suspendedweekly average≤ 2606 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, organic total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ .5 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ .75 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 209 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 261 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≤ .3 mg/Lall year
Phosphorus, total [as P]weekly average≤ .45 mg/Lall year
Phosphorus, total [as P]monthly average≤ 125 lb/dall year
Phosphorus, total [as P]weekly average≤ 156 lb/dall year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 50 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ 62.5 MGDall year
Chlorine, total residualmaximum≤ .02 mg/Lall 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≤ 2.9 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 4.4 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1209 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1512 lb/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 (lb/d)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all year
Chemical oxygen demand, solublemonthly average≤ 45 mg/Lall year
Chemical oxygen demand, solubleweekly average≤ 67.5 mg/Lall year
Chemical oxygen demand, solublemonthly average≤ 18765 lb/dall year
Chemical oxygen demand, solubleweekly average≤ 23456 lb/dall year
BOD, carbonaceous, 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/GA0026140 · MCP: https://passage-data.com/mcp