City of Watertown

NPDES permit TN0025488 · Minor POTW · effective, expires 2029-07-31 · EPA's file as of 2026-09-19

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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 25 forms filed late

Last period with anything received: 2026-07-31. Most often over: SSO, Wet Weather (1).

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 (85)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 6 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 <= 40 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 68 lb/d all year
001Solids, total suspendedWKLY AVG <= 90 lb/d all year
001Solids, settleableDAILY MX <= 1 mL/L all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]ROLL AVG <= 22134 lb/yr all year
001Nitrogen, ammonia total [as N]MO AVG <= .5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= .9 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= .7 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 1.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2.2 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 4.5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1.1 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 2.1 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 1.7 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.2 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]ROLL AVG <= 2865 lb/yr 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
001E. coliMO GEOMN <= 126 #/100mL all year
001E. coliDAILY MX <= 410 #/100mL all year
001SSO, Dry WeatherMO TOTAL <= 0 occur/mo all year
001SSO, Wet WeatherMO TOTAL <= 0 occur/mo all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 15 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 35 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 56 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 23 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 68 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 34 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous, percent removalDAILY MN > 40 % all year
001BOD, carbonaceous, percent removalMO AV MN > 85 % all year
001Solids, suspended percent removalDAILY MN > 40 % all year
001Solids, suspended percent removalMO AV MN > 85 % all year
001IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 100 % all year
001IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMINIMUM > 100 % all year
DNSTTemperature, water deg. centigradeVALUE report only all year
DNSTConductivityVALUE report only all year
DNSTOxygen, dissolved [DO]VALUE report only all year
DNSTpHVALUE report only all year
DNSTNitrogen, ammonia total [as N]VALUE report only all year
DNSTNitrogen, Kjeldahl, total [as N]VALUE report only all year
DNSTNitrite + Nitrate total [as N]VALUE report only all year
DNSTPhosphate, ortho [as PO4]VALUE report only all year
DNSTPhosphorus, total [as P]VALUE report only all year
DNSTE. coliGEO MEAN report only all year
IMP1Temperature, water deg. centigradeVALUE report only all year
IMP1ConductivityVALUE report only all year
IMP1Oxygen, dissolved [DO]VALUE report only all year
IMP1pHVALUE report only all year
IMP1Nitrogen, ammonia total [as N]VALUE report only all year
IMP1Nitrogen, Kjeldahl, total [as N]VALUE report only all year
IMP1Nitrite + Nitrate total [as N]VALUE report only all year
IMP1Phosphate, ortho [as PO4]VALUE report only all year
IMP1Phosphorus, total [as P]VALUE report only all year
IMP1E. coliGEO MEAN 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
UPSTTemperature, water deg. centigradeVALUE report only all year
UPSTConductivityVALUE report only all year
UPSTOxygen, dissolved [DO]VALUE report only all year
UPSTpHVALUE report only all year
UPSTNitrogen, ammonia total [as N]VALUE report only all year
UPSTNitrogen, Kjeldahl, total [as N]VALUE report only all year
UPSTNitrite + Nitrate total [as N]VALUE report only all year
UPSTPhosphate, ortho [as PO4]VALUE report only all year
UPSTPhosphorus, total [as P]VALUE report only all year
UPSTE. coliGEO MEAN 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