SOMERSWORTH W P C F

NPDES permit NH0100277 · Major POTW · administratively continued, expires 2005-10-31 · 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 2005-10-31 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
0required values missing, on 0 form(s)
0of 14 forms filed late

Last period with anything received: 2026-08-31. Most often over: E. coli, thermotol, MF, MTEC (2).

Reporting

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

Limits in force (74)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 6.5 mg/L Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX <= 50 mg/L Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CDAILY MX <= 17 mg/L Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CDAILY MX <= 50 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 600 lb/d Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG <= 190 lb/d Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG <= 600 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX <= 1001 lb/d Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CDAILY MX <= 317 lb/d Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CDAILY MX <= 1001 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 901 lb/d Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CWKLY AVG <= 285 lb/d Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CWKLY AVG <= 901 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001pHMINIMUM >= 6.5 SU Jun, Jul, Aug, Sep
001pHMINIMUM >= 6 SU Jun, Jul, Aug, Sep
001pHMINIMUM >= 6.5 SU Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001pHMAXIMUM <= 8 SU Jun, Jul, Aug, Sep
001pHMAXIMUM <= 8.5 SU Jun, Jul, Aug, Sep
001pHMAXIMUM <= 8 SU Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspendedMO AVG <= 30 mg/L Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 10 mg/L Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspendedWKLY AVG <= 45 mg/L Jun, Jul, Aug, Sep
001Solids, total suspendedWKLY AVG <= 15 mg/L Jun, Jul, Aug, Sep
001Solids, total suspendedWKLY AVG <= 45 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspendedDAILY MX <= 50 mg/L Jun, Jul, Aug, Sep
001Solids, total suspendedDAILY MX <= 17 mg/L Jun, Jul, Aug, Sep
001Solids, total suspendedDAILY MX <= 50 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspendedMO AVG <= 600 lb/d Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 190 lb/d Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 600 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspendedDAILY MX <= 1001 lb/d Jun, Jul, Aug, Sep
001Solids, total suspendedDAILY MX <= 317 lb/d Jun, Jul, Aug, Sep
001Solids, total suspendedDAILY MX <= 1001 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG <= 901 lb/d Jun, Jul, Aug, Sep
001Solids, total suspendedWKLY AVG <= 285 lb/d Jun, Jul, Aug, Sep
001Solids, total suspendedWKLY AVG <= 901 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 13 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]WKLY AVG report only Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]WKLY AVG <= 143 lb/d Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]WKLY AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 264 lb/d Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Phosphorus, total [as P]MO AVG <= .75 mg/L May, Jun, Jul, Aug, Sep
001Phosphorus, total [as P]MO AVG <= 9.5 lb/d May, Jun, Jul, Aug, Sep
001Hardness, total [as CaCO3]DAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Nickel, total recoverableDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Zinc, total recoverableDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Aluminum, total recoverableDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Cadmium, total recoverableDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Lead, total recoverableDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Chromium, total recoverableDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Copper, total recoverableDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001E. coli, thermotol, MF, MTECMO GEO <= 126 #/100mL all year
001E. coli, thermotol, MF, MTECDAILY MX <= 406 #/100mL 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
001Chlorine, total residualMO AVG <= .08 mg/L all year
001Chlorine, total residualDAILY MX <= .14 mg/L all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaDAILY MN >= 100 % Apr, May, Jun, Jul, Aug, Sep
001LC50 Static Renewal 48Hr Acute Pimephales promelasDAILY MN >= 100 % Apr, May, Jun, Jul, Aug, Sep
001NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiaDAILY MN >= 13.6 % Apr, May, Jun, Jul, Aug, Sep
001Noel Statre 7Day Chronic PimephalesDAILY MN >= 13.6 % Apr, May, Jun, Jul, Aug, Sep

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