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Columbia County Water Utility

Sewage treatment plant, major discharger, Martinez, Georgia. NPDES permit GA0031992, in force until Mar 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 46 days after each period: outfall 001 form B1 monthly (42 values), outfall 002 form B2 monthly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (43)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 384 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 480 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Solids, total suspendedweekly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 767 lb/dall year001
Solids, total suspendedweekly average≤ 959 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/Lall year001
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 38.4 lb/dall year001
Nitrogen, ammonia total [as N]weekly average≤ 48 lb/dall year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Copper, total recoverablemonthly average≤ 12.3 ug/Lall year001
Copper, total recoverableweekly average≤ 16.9 ug/Lall year001
Copper, total recoverablemonthly average≤ .47 lb/dall year001
Copper, total recoverableweekly average≤ .65 lb/dall year001
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly average≤ 4.6 MGDall year001
Flow, in conduit or thru treatment plantweekly average≤ 5.8 MGDall year001
Chlorine, total residualmaximum≤ .01 mg/Lall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. coliweekly geometric mean≤ 410 #/100mLall year001
Solids, sludge, total, dry weightmonthly totalreport only (dry ton)all year001
BOD, 5-day, percent removalminimum≥ 85 %all year001
Solids, suspended percent removalminimum≥ 85 %all year001
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year001
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year001
Hardness, total [as CaCO3]monthly minimumreport only (mg/L)all year002

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/GA0031992 · MCP: https://passage-data.com/mcp