Columbus Water Works

NPDES permit GA0020516 · Major POTW · effective, expires 2031-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
0required values missing, on 0 form(s)
0of 12 forms filed late

Last period with anything received: 2026-08-31. Most often over: Solids, suspended percent removal (1).

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among GA permits in EPA's filings — check your permit).

Limits in force (41)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 2 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 10508 lb/d all year
001Solids, total suspendedWKLY AVG <= 13136 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 16 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= 17.4 mg/L Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 24 mg/L Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= 26.1 mg/L Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 5604 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]MO AVG <= 6095 lb/d Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 7006 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= 7619 lb/d Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphate, ortho [as P]MO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantWKLY AVG report only all year
001Chlorine, total residualMAXIMUM <= .21 mg/L all year
001E. coliMOAV GEO <= 126 #/100mL all year
001E. coliWE <= 410 #/100mL all year
001Solids, sludge, total, dry weightMO TOTAL report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 8757 lb/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 10946 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
001BOD, carbonaceous, percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM report only all year
001NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasMINIMUM report only all year
001NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM report only all year
001NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMINIMUM report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states