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Somerset W P C F

Sewage treatment plant, major discharger, Somerset, Massachusetts. NPDES permit MA0100676, in force until May 31, 2029. Last 12 months: over a limit 14 times (last September 2026), 31 required values missing, 7 of 32 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (32 values), outfall 001 form T quarterly (10 values), outfall 001 form TA quarterly (10 values), outfall PFAS form E quarterly (41 values), outfall PFAS form IF quarterly (41 values), outfall PFAS form SL quarterly (40 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
24 values over a limit, 63 required values missing, 9 of 29 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 14 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, total [as N], rolling average193.2 lb/d≤ 175 lb/d10%
November 2025Enterococci, daily maximum132 CFU/100mL≤ 104 CFU/100mL27%
November 2025Enterococci, daily maximum132 CFU/100mL≤ 104 CFU/100mL27%
December 2025Chlorine, total residual, daily maximum.42 mg/L≤ .21 mg/L100%
January 2026Chlorine, total residual, daily maximum.89 mg/L≤ .21 mg/L324%
January 2026Chlorine, total residual, monthly average.26 mg/L≤ .12 mg/L117%
February 2026Chlorine, total residual, daily maximum.46 mg/L≤ .21 mg/L119%
March 2026BOD, 5-day, percent removal, monthly average minimum84 %≥ 85 %7%
March 2026Chlorine, total residual, daily maximum.57 mg/L≤ .21 mg/L171%
March 2026Chlorine, total residual, monthly average.14 mg/L≤ .12 mg/L17%
May 2026Nitrogen, total [as N], rolling average246.1 lb/d≤ 175 lb/d41%
July 2026Nitrogen, total [as N], rolling average314 lb/d≤ 175 lb/d79%
August 2026Nitrogen, total [as N], rolling average303.8 lb/d≤ 175 lb/d74%
September 2026Chlorine, total residual, daily maximum.55 mg/L≤ .21 mg/L162%

Limits in force (180)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 1051 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 1576 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
pHdaily maximumreport only (SU)all year001
Salinitydaily maximumreport only (ppt)all year001
Salinitydaily maximumreport only (ppt)all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 1051 lb/dall year001
Solids, total suspendedweekly average≤ 1576 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, total [as N]daily maximumreport only (mg/L)May–Oct001
Nitrogen, total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, total [as N]rolling average≤ 175 lb/dMay–Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)May–Oct001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)May–Oct001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year001
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year001
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Lead, total [as Pb]daily maximumreport only (mg/L)all year001
Lead, total [as Pb]daily maximumreport only (mg/L)all year001
Nickel, total [as Ni]daily maximumreport only (mg/L)all year001
Nickel, total [as Ni]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantrolling average≤ 4.2 MGDall year001
Chlorine, total residualmonthly average≤ .12 mg/Lall year001
Chlorine, total residualdaily maximum≤ .21 mg/Lall year001
Enterococcimonthly geometric mean≤ 35 CFU/100mLall year001
Enterococcidaily maximum≤ 104 CFU/100mLall year001
Coliform, fecal generalmonthly geometric mean≤ 88 MPN/100mLall year001
Coliform, fecal generaldaily maximum≤ 260 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
LC50 Static 48Hr Acute Menidiamonthly average minimum≥ 100 %all year001
NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimum≥ 6 %all year001
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all yearPFAS
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all yearPFAS
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/g)all yearPFAS
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all yearPFAS
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all yearPFAS
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/g)all yearPFAS
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all yearPFAS
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all yearPFAS
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/g)all yearPFAS
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all yearPFAS
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all yearPFAS
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/g)all yearPFAS
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all yearPFAS
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all yearPFAS
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/g)all yearPFAS
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all yearPFAS
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all yearPFAS
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/g)all yearPFAS
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all yearPFAS
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all yearPFAS
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/g)all yearPFAS
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all yearPFAS
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all yearPFAS
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/g)all yearPFAS
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all yearPFAS
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all yearPFAS
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/g)all yearPFAS
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all yearPFAS
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all yearPFAS
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/g)all yearPFAS
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all yearPFAS
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all yearPFAS
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/g)all yearPFAS
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all yearPFAS
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all yearPFAS
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/g)all yearPFAS
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all yearPFAS
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all yearPFAS
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/g)all yearPFAS
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all yearPFAS
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all yearPFAS
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/g)all yearPFAS
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all yearPFAS
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all yearPFAS
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/g)all yearPFAS
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all yearPFAS
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all yearPFAS
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/g)all yearPFAS
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all yearPFAS
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all yearPFAS
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/g)all yearPFAS
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all yearPFAS
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all yearPFAS
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/g)all yearPFAS
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all yearPFAS
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all yearPFAS
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/g)all yearPFAS
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all yearPFAS
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all yearPFAS
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/g)all yearPFAS
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all yearPFAS
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all yearPFAS
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/g)all yearPFAS
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all yearPFAS
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all yearPFAS
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/g)all yearPFAS
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all yearPFAS
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all yearPFAS
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/g)all yearPFAS
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all yearPFAS
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all yearPFAS
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/g)all yearPFAS
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all yearPFAS
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all yearPFAS
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/g)all yearPFAS
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all yearPFAS
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all yearPFAS
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/g)all yearPFAS
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all yearPFAS
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all yearPFAS
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/g)all yearPFAS
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all yearPFAS
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all yearPFAS
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/g)all yearPFAS
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all yearPFAS
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all yearPFAS
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/g)all yearPFAS
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all yearPFAS
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all yearPFAS
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/g)all yearPFAS
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all yearPFAS
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all yearPFAS
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/g)all yearPFAS
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all yearPFAS
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all yearPFAS
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/g)all yearPFAS
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all yearPFAS
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all yearPFAS
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/g)all yearPFAS
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all yearPFAS
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all yearPFAS
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/g)all yearPFAS
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all yearPFAS
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all yearPFAS
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/g)all yearPFAS
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all yearPFAS
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all yearPFAS
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/g)all yearPFAS
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all yearPFAS
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all yearPFAS
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/g)all yearPFAS
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all yearPFAS
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all yearPFAS
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/g)all yearPFAS
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all yearPFAS
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all yearPFAS
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/g)all yearPFAS
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all yearPFAS
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all yearPFAS
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/g)all yearPFAS
Fluorine, adsorbable organicdaily maximumreport only (ng/L)all yearPFAS
Fluorine, adsorbable organicdaily maximumreport only (ng/L)all yearPFAS

How strict are these limits?

Cited limits by parameter: Massachusetts's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MA0100676 · MCP: https://passage-data.com/mcp