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NPDES permit MA0100439 · Major POTW · effective, expires 2026-11-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
1of 27 forms filed late

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

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 (109)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Oxygen, dissolved [DO]DAILY MN >= 6 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 10 mg/L Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CDAILY MX report only Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG <= 1500 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 500 lb/d Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CWKLY AVG <= 2250 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 500 lb/d Apr, May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.3 SU all year
001pHDAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 15 mg/L Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedWKLY AVG <= 15 mg/L Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedWKLY AVG <= 45 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedDAILY MX report only Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedDAILY MX report only Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedMO AVG <= 750 lb/d Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedMO AVG <= 1500 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedWKLY AVG <= 750 lb/d Apr, May, Jun, Jul, Aug, Sep
001Solids, total suspendedWKLY AVG <= 2250 lb/d Jan, Feb, Mar, Oct, Nov, Dec
001Solids, total suspendedMO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]ROLL AVG <= 400 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 7.1 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]WKLY AVG <= 10 mg/L Apr
001Nitrogen, ammonia total [as N]WKLY AVG <= 5 mg/L May
001Nitrogen, ammonia total [as N]WKLY AVG <= 2 mg/L Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 15 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG report only Apr
001Nitrogen, ammonia total [as N]MO AVG report only May
001Nitrogen, ammonia total [as N]MO AVG report only Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]WKLY AVG report only Apr
001Nitrogen, ammonia total [as N]WKLY AVG report only May
001Nitrogen, ammonia total [as N]WKLY AVG report only Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG <= .14 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]MO AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct
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
001Carbon, tot organic [TOC]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Carbon, tot organic [TOC]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Carbon, dissolved organic [as C]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Hardness, total [as CaCO3]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Hardness, total [as CaCO3]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Cadmium, total [as Cd]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Cadmium, total [as Cd]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Copper, total [as Cu]MO AVG <= 17.8 ug/L all year
001Copper, total [as Cu]DAILY MX <= 25.7 ug/L all year
001Copper, total [as Cu]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Copper, total [as Cu]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Lead, total [as Pb]MO AVG <= 5.1 ug/L all year
001Lead, total [as Pb]DAILY MX report only all year
001Lead, total [as Pb]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Lead, total [as Pb]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Nickel, total [as Ni]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Nickel, total [as Ni]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Zinc, total [as Zn]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Zinc, total [as Zn]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Aluminum, total [as Al]MO AVG <= 399 ug/L all year
001Aluminum, total [as Al]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Aluminum, total [as Al]DAILY MX report only all year
001Aluminum, total [as Al]DAILY MX report only Jan, Feb, Mar, Jul, Aug, Sep
001Flow, in conduit or thru treatment plantROLL AVG <= 6 MGD 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 <= 17.1 ug/L all year
001Chlorine, total residualDAILY MX <= 29.5 ug/L all year
001E. coliGEO MEAN <= 126 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coliDAILY MX <= 409 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001LC50 Static 48Hr Acute Ceriodaphnia dubiaMO AV MN >= 100 % Jan, Feb, Mar, Jul, Aug, Sep
001NOEL Static 7Day Chronic Ceriodaphnia dubiaMO AV MN >= 65 % Jan, Feb, Mar, Jul, Aug, Sep
PFASPerfluorooctanoic acid (PFOA)DAILY MX report only all year
PFASPerfluorooctanoic acid (PFOA)DAILY MX report only all year
PFASPerfluorooctanoic acid (PFOA)DAILY MX report only all year
PFASPerfluoroheptanoic acid (PFHpA)DAILY MX report only all year
PFASPerfluoroheptanoic acid (PFHpA)DAILY MX report only all year
PFASPerfluoroheptanoic acid (PFHpA)DAILY MX report only all year
PFASPerfluorononanoic acid (PFNA)DAILY MX report only all year
PFASPerfluorononanoic acid (PFNA)DAILY MX report only all year
PFASPerfluorononanoic acid (PFNA)DAILY MX report only all year
PFASPerfluorodecanoic acid (PFDA)DAILY MX report only all year
PFASPerfluorodecanoic acid (PFDA)DAILY MX report only all year
PFASPerfluorodecanoic acid (PFDA)DAILY MX report only all year
PFASPerfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
PFASPerfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
PFASPerfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
PFASPerfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
PFASPerfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
PFASPerfluorooctanesulfonic acid (PFOS)DAILY MX report only 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