THE CITY OF WARWICK C/O WARWICK WASTEWATER TREATMENT FACILITY

NPDES permit RI0100234 · Major POTW · administratively continued, expires 2024-12-31 · 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.

This permit expired on 2024-12-31 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

2values over a limit
2required values missing, on 1 form(s)
1of 19 forms filed late

Last period with anything received: 2026-07-31. Most often over: LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia (1), NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia (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 (114)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L Jun, Jul, Aug, Sep, Oct
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 25 mg/L Jun, Oct
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Solids, total suspendedMO AVG <= 20 mg/L Jul, Aug, Sep
001Solids, total suspendedWKLY AVG <= 25 mg/L Jun, Oct
001Solids, total suspendedWKLY AVG <= 45 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Solids, total suspendedWKLY AVG <= 20 mg/L Jul, Aug, Sep
001Solids, total suspendedDAILY MX <= 30 mg/L Jun, Oct
001Solids, total suspendedDAILY MX <= 50 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Solids, total suspendedDAILY MX <= 30 mg/L Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 1605 lb/d Jun, Oct
001Solids, total suspendedMO AVG <= 1927 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001Solids, total suspendedMO AVG <= 1284 lb/d Jul, Aug, Sep
001Solids, total suspendedDAILY MX <= 1927 lb/d Jun, Oct
001Solids, total suspendedDAILY MX <= 3211 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001Solids, total suspendedDAILY MX <= 1927 lb/d Jul, Aug, Sep
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, settleableWKLY AVG report only all year
001Solids, settleableDAILY MX report only all year
001Nitrogen, total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, total [as N]MO AVG <= 8 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]DAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, total [as N]MO AVG <= 514 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 5.2 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 13.5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG report only May
001Nitrogen, ammonia total [as N]WKLY AVG <= 2 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 61 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 60.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, nitrite total [as N]MO AVG report only May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, nitrite total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, nitrite total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, nitrite total [as N]DAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, nitrate total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, nitrate total [as N]MO AVG report only May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, nitrate total [as N]DAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, nitrate total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, Kjeldahl, total [as N]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MO AVG report only May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG <= .1 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG <= 1 mg/L Jan, Feb, Mar, Nov, Dec
001Phosphorus, total [as P]DAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]DAILY MX report only Jan, Feb, Mar, Nov, Dec
001Cadmium, total [as Cd]MO AVG report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Chromium, hexavalent [as Cr]MO AVG report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Iron, total [as Fe]MO AVG <= 1520 ug/L all year
001Iron, total [as Fe]DAILY MX report only all year
001Lead, total [as Pb]MO AVG <= 3 ug/L all year
001Lead, total [as Pb]DAILY MX <= 8.7 ug/L all year
001Nickel, total [as Ni]MO AVG report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Aluminum, total [as Al]MO AVG <= 125 ug/L all year
001Aluminum, total [as Al]MO AVG <= 684 ug/L all year
001Aluminum, total [as Al]DAILY MX <= 1080 ug/L all year
001Aluminum, total [as Al]DAILY MX <= 1031 ug/L all year
001ChloroformMO AVG <= 46 ug/L all year
001ChloroformDAILY MX <= 2081 ug/L all year
001Flow, in conduit or thru treatment plantMO AVG <= 7.7 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG <= 20 ug/L all year
001Chlorine, total residualDAILY MX <= 34 ug/L all year
001Phosphorus, orthoMO AVG report only Jan, Feb, Mar, Nov, Dec
001Phosphorus, orthoDAILY MX report only Jan, Feb, Mar, Nov, Dec
001Cyanide, free availableMO AVG <= 10 ug/L all year
001Cyanide, free availableDAILY MX <= 32 ug/L all year
001EnterococciMO GEO <= 54 CFU/100mL all year
001EnterococciDAILY MX <= 175 CFU/100mL all year
001Coliform, fecal generalMO GEO report only all year
001Coliform, fecal generalWB report only all year
001Coliform, fecal generalDAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L Jun, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 15 mg/L Jun, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 10 mg/L Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 45 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L Jun, Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 15 mg/L Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 1605 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 963 lb/d Jun, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 642 lb/d Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 2890 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 1284 lb/d Jun, Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 963 lb/d Jul, Aug, Sep
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 [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001LC50 Static 48Hr Acute Pimephales promelasMINIMUM >= 100 % all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMINIMUM >= 100 % all year
001NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiaMINIMUM >= 50 % 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