ROCKY HILL WPCF

NPDES permit CT0100480 · Major POTW · effective, expires 2026-11-30 · 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

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 (88)

OutfallParameterStatisticLimitMonths
001Flow rateMO AVG report only all year
001Flow rateDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/g all year
001BOD, 5-day, 20 deg. CDAILY MX <= 50 mg/g 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
001BOD, 5-day, 20 deg. CDAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
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 Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Solids, total suspendedDAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Mar, Jun, Sep, Dec
001Nitrogen, nitrite total [as N]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
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
001Nitrogen, nitrate total [as N]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only Mar, Jun, Sep, Dec
001Phosphorus, total [as P]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Cyanide, total [as CN]DAILY MX report only Mar, Jun, Sep, Dec
001Cyanide, total [as CN]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Cyanide, free [amenable to chlorination]DAILY MX report only Mar, Jun, Sep, Dec
001Cyanide, free [amenable to chlorination]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Arsenic, total [as As]DAILY MX report only Mar, Jun, Sep, Dec
001Arsenic, total [as As]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Beryllium, total [as Be]DAILY MX report only Mar, Jun, Sep, Dec
001Beryllium, total [as Be]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Cadmium, total [as Cd]DAILY MX report only Mar, Jun, Sep, Dec
001Cadmium, total [as Cd]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Chromium, hexavalent [as Cr]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Chromium, hexavalent [as Cr]DAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total [as Cr]DAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total [as Cr]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Copper, total [as Cu]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Copper, total [as Cu]DAILY MX report only Mar, Jun, Sep, Dec
001Iron, total [as Fe]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Iron, total [as Fe]DAILY MX report only Mar, Jun, Sep, Dec
001Lead, total [as Pb]DAILY MX report only Mar, Jun, Sep, Dec
001Lead, total [as Pb]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Thallium, total [as Tl]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Thallium, total [as Tl]DAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total [as Ni]DAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total [as Ni]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Silver, total [as Ag]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Silver, total [as Ag]DAILY MX report only Mar, Jun, Sep, Dec
001Zinc, total [as Zn]DAILY MX report only Mar, Jun, Sep, Dec
001Zinc, total [as Zn]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Antimony, total [as Sb]DAILY MX report only Mar, Jun, Sep, Dec
001Antimony, total [as Sb]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Aluminum, total [as Al]DAILY MX report only Mar, Jun, Sep, Dec
001Aluminum, total [as Al]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Selenium, total [as Se]DAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
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
001PhenolsDAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Chlorine, total residualINST MIN >= .2 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualINST MAX <= 1.5 mg/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualDAILY MX report only Mar, Jun, Sep, Dec
001Chlorine, total residualDAILY MX report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001Enterococci30DA GEO <= 35 #/100mL all year
001EnterococciMAXIMUM <= 500 #/100mL all year
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
001Solids, total, percentINST MIN report only Feb, Apr, Jun, Aug, Oct, Dec
001Solids, fixed, % of total solidsINST MAX 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 Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
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, carbonaceous [5 day, 5 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 5 C]DAILY MX report only all year
001Solids, suspended percent removalMN % RMV >= 85 % all year
001Carbonaceous oxygen demand, % removalMN % RMV >= 85 % all year
001NOAEL Static 48Hr Acute D. pulexINST MIN >= 90 % survival Mar, Jun, Sep, Dec
001NOAEL Static 48Hr Acute D. pulexINST MIN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001NOAEL Static 48Hr Acute Pimephales promelasINST MIN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001NOAEL Static 48Hr Acute Pimephales promelasINST MIN >= 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