City of Chattanooga

NPDES permit TN0024210 · Major POTW · administratively continued, expires 2024-10-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2024-10-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

16values over a limit
0required values missing, on 0 form(s)
0of 110 forms filed late

Last period with anything received: 2026-07-31. Most often over: SSO, Dry Weather (4), E. coli (3), SSO, Wet Weather (3).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (98)

OutfallParameterStatisticLimitMonths
001Rainfall durationMO TOTAL report only all year
001Oxygen, dissolved [DO]INST MIN >= 4 mg/L all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 40 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 32526 lb/d May, Sep
001Solids, total suspendedMO AVG <= 28523 lb/d Oct
001Solids, total suspendedMO AVG <= 35028 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMO AVG <= 25020 lb/d Jun, Jul, Aug
001Solids, settleableDAILY MX <= 1 mL/L all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 15 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 20 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG <= 16263 lb/d May, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 17514 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 14261 lb/d Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 21684 lb/d May, Sep
001Nitrogen, ammonia total [as N]WKLY AVG <= 23352 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 19015 lb/d Oct
001Nitrogen, ammonia total [as N]MO AVG <= 12510 lb/d Jun, Jul, Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= 16680 lb/d Jun, Jul, Aug
001Phosphorus, total [as P]DAILY MX report only all year
001RainfallMO TOTAL report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .68 mg/L May, Sep
001Chlorine, total residualDAILY MX <= .28 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Chlorine, total residualDAILY MX <= .34 mg/L Oct
001Chlorine, total residualDAILY MX <= 1.61 mg/L Jun, Jul, Aug
001E. coliGEO MEAN <= 126 #/100mL all year
001E. coliDAILY MX <= 487 #/100mL all year
001Rainfall eventsMO TOTAL report only all year
001Flow, dischargeMO AVG report only all year
001Flow, dischargeDAILY MX report only all year
001SSO, Dry WeatherMO TOTAL <= 0 occur/mo all year
001SSO, Wet WeatherMO TOTAL <= 0 occur/mo all year
001OverflowsMO TOTAL report only all year
001OverflowsMO 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 <= 35 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 27105 lb/d May, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 29190 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 23769 lb/d Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 20850 lb/d Jun, Jul, Aug
001Solids, suspended percent removalDAILY MN >= 40 % all year
001Solids, suspended percent removalWD >= 65 % all year
001Solids, suspended percent removalMO AV MN >= 80 % all year
001Carbonaceous oxygen demand, % removalDAILY MN >= 40 % all year
001Carbonaceous oxygen demand, % removalWD >= 65 % all year
001Carbonaceous oxygen demand, % removalMO AV MN >= 79 % all year
001Discharge event observation [Visual Monitoring]MO TOTAL report only all year
001IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 2.8 % May, Sep
001IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 6.7 % Jan, Feb, Mar, Apr, Nov, Dec
001IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 5.5 % Oct
001IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 1.2 % Jun, Jul, Aug
001IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 2.8 % May, Sep
001IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 6.7 % Jan, Feb, Mar, Apr, Nov, Dec
001IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 5.5 % Oct
001IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 1.2 % Jun, Jul, Aug
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Discharge event observation [Visual Monitoring]MO TOTAL report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Bypass of Treatment FacilityAVERAGE <= 1 occur/yr Oct
003Bypass of Treatment FacilityANNL MAX <= 3 occur/yr Dec
003Discharge event observation [Visual Monitoring]MO TOTAL report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Discharge event observation [Visual Monitoring]MO TOTAL report only all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Discharge event observation [Visual Monitoring]TOTAL report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Bypass of Treatment FacilityANNL MAX <= 12 occur/yr Dec
006Discharge event observation [Visual Monitoring]TOTAL report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Discharge event observation [Visual Monitoring]TOTAL report only all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
008Discharge event observation [Visual Monitoring]TOTAL report only all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
009Bypass of Treatment FacilityAVERAGE <= 4 occur/yr Oct
009Bypass of Treatment FacilityANNL MAX <= 6 occur/yr Dec
009Discharge event observation [Visual Monitoring]TOTAL report only all year
INF1Solids, total suspendedMO AVG report only all year
INF1Solids, total suspendedDAILY MX report only all year
INF1Flow, in conduit or thru treatment plantMO AVG report only all year
INF1Flow, in conduit or thru treatment plantDAILY MX report only all year
INF1BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
INF1BOD, carbonaceous [5 day, 20 C]DAILY MX 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