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Columbus Water Works

Sewage treatment plant, major discharger, Columbus, Georgia. NPDES permit GA0020516, in force until Jun 30, 2031. Last 12 months: over a limit once (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 46 days after each period: form 1 monthly (37 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
July 2026Solids, suspended percent removal, minimum79 %≥ 85 %40%

Limits in force (41)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 2 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 10508 lb/dall year
Solids, total suspendedweekly average≤ 13136 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)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≤ 16 mg/LJun–Aug
Nitrogen, ammonia total [as N]monthly average≤ 17.4 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 24 mg/LJun–Aug
Nitrogen, ammonia total [as N]weekly average≤ 26.1 mg/LJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5604 lb/dJun–Aug
Nitrogen, ammonia total [as N]monthly average≤ 6095 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 7006 lb/dJun–Aug
Nitrogen, ammonia total [as N]weekly average≤ 7619 lb/dJan, Feb, Mar, Apr, May, Sep, Oct, 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
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualmaximum≤ .21 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, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8757 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10946 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, 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

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/GA0020516 · MCP: https://passage-data.com/mcp