WALLINGFORD WPCF

NPDES permit CT0100617 · Major POTW · expired, expires 2024-09-30 · 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.

This permit expired on 2024-09-30 and is expired: 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

0values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31.

Reporting

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

Limits in force (85)

OutfallParameterStatisticLimitMonths
001Flow rateMO AVG report only all year
001Flow rateDAILY MX report only all year
001Oxygen demand, ultimateMO AVG <= 36.2 mg/L Jun
001Oxygen demand, ultimateMO AVG <= 50 mg/L May
001Oxygen demand, ultimateMO AVG <= 31.7 mg/L Jul
001Oxygen demand, ultimateMO AVG <= 31.7 mg/L Aug
001Oxygen demand, ultimateMO AVG <= 31.7 mg/L Sep
001Oxygen demand, ultimateMO AVG <= 36.2 mg/L Oct
001Oxygen demand, ultimateDAILY MX report only Jul
001Oxygen demand, ultimateDAILY MX report only May
001Oxygen demand, ultimateDAILY MX report only Jun
001Oxygen demand, ultimateDAILY MX report only Aug
001Oxygen demand, ultimateDAILY MX report only Sep
001Oxygen demand, ultimateDAILY MX report only Oct
001Oxygen, dissolved [DO]INST MIN >= 7 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 50 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only Mar, Jun, Sep, Dec
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 50 mg/L all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 6 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Jun
001Nitrogen, ammonia total [as N]MO AVG <= 3 mg/L Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 9 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX report only May
001Nitrogen, ammonia total [as N]DAILY MX report only Jun
001Nitrogen, ammonia total [as N]DAILY MX report only Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX report only Apr
001Nitrogen, ammonia total [as N]DAILY MX report only Oct
001Nitrogen, nitrite total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, nitrate total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Phosphorus, total [as P]MO AVG <= .31 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]DAILY MX <= .62 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]DAILY MX report only Jan, Feb, Mar, Nov, Dec
001Phosphorus, total [as P]DAILY MX report only Mar, Jun, Sep, Dec
001Cyanide, total [as CN]DAILY MX report only Mar, Jun, Sep, Dec
001Cyanide, free [amenable to chlorination]DAILY MX report only Mar, Jun, Sep, Dec
001Arsenic, total [as As]DAILY MX report only Mar, Jun, Sep, Dec
001Beryllium, total [as Be]DAILY MX report only Mar, Jun, Sep, Dec
001Cadmium, total [as Cd]DAILY MX report only Mar, Jun, Sep, Dec
001Chromium, hexavalent [as Cr]DAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total [as Cr]DAILY MX report only Mar, Jun, Sep, Dec
001Copper, total [as Cu]DAILY MX report only Mar, Jun, Sep, Dec
001Iron, total [as Fe]DAILY MX report only Mar, Jun, Sep, Dec
001Lead, total [as Pb]DAILY MX report only Mar, Jun, Sep, Dec
001Thallium, total [as Tl]DAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total [as Ni]DAILY MX report only Mar, Jun, Sep, Dec
001Silver, total [as Ag]DAILY MX report only Mar, Jun, Sep, Dec
001Zinc, total [as Zn]DAILY MX report only Mar, Jun, Sep, Dec
001Antimony, total [as Sb]DAILY MX report only Mar, Jun, Sep, Dec
001Aluminum, total [as Al]DAILY MX report only all year
001Aluminum, total [as Al]MO AVG <= 7.9 kg/d all year
001Aluminum, total [as Al]DAILY MX <= 15.85 kg/d all year
001Aluminum, total [as Al]DAILY MX report only Mar, Jun, Sep, Dec
001Selenium, total [as Se]DAILY MX report only Mar, Jun, Sep, Dec
001Polychlorinated biphenyls [PCBs]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001PhenolsDAILY MX report only Mar, Jun, Sep, Dec
001E. coli30DA GEO <= 126 MPN/100mL May, Jun, Jul, Aug, Sep
001E. coliMAXIMUM <= 410 MPN/100mL May, Jun, Jul, Aug, Sep
001Phosphorus, Total [Avg Seasonal Load Cap]MO AVG <= 8.95 lb/d Sep
001Arsenic, sludge tot. dry wt [as As]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Beryllium, sludge, tot. dry wt [as Be]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Ultraviolet light dosageINST MIN >= 30 mW-sec/cm2 May, Jun, Jul, Aug, Sep
001Solids, total, percentINST MIN report only Feb, Apr, Jun, Aug, Oct, Dec
001Solids, fixed, % of total solidsINST MIN report only Feb, Apr, Jun, Aug, Oct, Dec
001Solids, volatile % of total solidsINST MIN report only Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total [as Hg]DAILY MX report only Mar, Jun, Sep, Dec
001Zinc, sludge, total, dry weight [as Zn]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Lead, sludge, total, dry weight [as Pb]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Nickel, sludge, total, dry weight [as Ni]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, sludge, total, dry weight [as Hg]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Chromium, sludge, total, dry weight [as Cr]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Copper, sludge, total, dry weight [as Cu]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001Cadmium, sludge, total, dry weight [as Cd]INST MAX report only Feb, Apr, Jun, Aug, Oct, Dec
001BOD, 5-day, percent removalMN % RMV >= 85 % all year
001Solids, suspended percent removalMN % RMV >= 85 % all year
001NOAEL Static 48Hr Acute D. pulexMINIMUM >= 90 % survival Mar, Jun, Sep, Dec
001NOAEL Static 48Hr Acute Pimephales promelasMINIMUM >= 90 % survival Mar, Jun, Sep, Dec

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