NORWICH (C) WATER SYSTEM

NPDES permit NY0021423 · Major POTW · effective, expires 2029-02-28 · 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

4values over a limit
0required values missing, on 0 form(s)
1of 18 forms filed late

Last period with anything received: 2026-08-31. Most often over: Phosphorus, total [as P] (4).

Reporting

Reports are due about 59 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (68)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001Oxygen demand, ultimateMO AVG report only May, Jun, Jul, Aug, Sep, Oct
001Oxygen demand, ultimateMO AVG <= 770 lb/d May, Jun, Jul, Aug, Sep, Oct
001Oxygen, dissolved [DO]DAILY MN >= 6 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. C7 DA AVG <= 45 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 630 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. C7 DA AVG <= 940 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. C7 DA AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. C7 DA AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHDAILY MN report only all year
001pHDAILY MX report only all year
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMO AVG <= 30 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspended7 DA AVG <= 45 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspended7 DA AVG <= 45 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 630 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMO AVG <= 550 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspended7 DA AVG <= 940 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspended7 DA AVG <= 830 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG report only all year
001Solids, total suspended7 DA AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspended7 DA AVG report only all year
001Solids, settleableDAILY MX <= .3 mL/L all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]12 <= 177000 lb/yr all year
001Nitrogen, total [as N]12 <= 214000 lb/yr all year
001Nitrogen, ammonia total [as N]MO AVG <= 10 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, nitrite total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Phosphorus, total [as P]12 <= 3610 lb/yr all year
001Flow, in conduit or thru treatment plantMO AVG <= 2.5 MGD Jan, Feb, Mar, Apr, Nov, Dec
001Flow, in conduit or thru treatment plantMO AVG <= 2.2 MGD May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= .5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 3.3 tox acute (alert) May, Jun, Jul, Aug, Sep, Oct
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 5.7 tox acute (alert) Jan, Feb, Mar, Apr, Nov, Dec
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 12 tox chronic (alert) May, Jun, Jul, Aug, Sep, Oct
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 24 tox chronic (alert) Jan, Feb, Mar, Apr, Nov, Dec
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 3.3 tox acute (alert) May, Jun, Jul, Aug, Sep, Oct
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 5.7 tox acute (alert) Jan, Feb, Mar, Apr, Nov, Dec
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 12 tox chronic (alert) May, Jun, Jul, Aug, Sep, Oct
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 24 tox chronic (alert) Jan, Feb, Mar, Apr, Nov, Dec
001Mercury, total [as Hg]DAILY MX <= 50 ng/L all year
001Coliform, fecal general30DA GEO <= 200 #/100mL May, Jun, Jul, Aug, Sep, Oct
001Coliform, fecal general7 DA GEO <= 400 #/100mL May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 460 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 730 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG report only May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG report only May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG report only May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG report only May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, percent removalMO AV MN >= 85 % Jan, Feb, Mar, Apr, Nov, Dec
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Carbonaceous oxygen demand, % removalMO AV MN >= 85 % May, Jun, Jul, Aug, Sep, Oct

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