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Amherst W W T P

Sewage treatment plant, major discharger, Hadley, Massachusetts. NPDES permit MA0100218, in force until Jan 31, 2029. Last 12 months: over a limit 12 times (last September 2026), 2 required values missing, 2 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (28 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
22 values over a limit, 2 required values missing, 6 of 28 reports late

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

Period endingParameterReportedLimitOver by
November 2025pH, minimum5.3 SU≥ 6 SU—
December 2025Nitrogen, total [as N], rolling average482.3 lb/d≤ 474 lb/d2%
December 2025pH, minimum5.77 SU≥ 6 SU—
March 2026Nitrogen, total [as N], rolling average475.6 lb/d≤ 474 lb/d0%
April 2026E. coli, thermotol, MF, MTEC, daily maximum461.1 CFU/100mL≤ 409 CFU/100mL13%
April 2026Nitrogen, total [as N], rolling average477.7 lb/d≤ 474 lb/d1%
May 2026Nitrogen, total [as N], rolling average476.7 lb/d≤ 474 lb/d1%
June 2026Chlorine, total residual, daily maximum1.04 mg/L≤ 1 mg/L4%
June 2026Nitrogen, total [as N], rolling average476.2 lb/d≤ 474 lb/d0%
July 2026Nitrogen, total [as N], rolling average484.6 lb/d≤ 474 lb/d2%
August 2026Nitrogen, total [as N], rolling average486.1 lb/d≤ 474 lb/d3%
September 2026Nitrogen, total [as N], rolling average481.4 lb/d≤ 474 lb/d2%

Limits in force (176)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)Apr, May, Jun, Oct, Nov, Dec001
pHminimum≥ 6 SUall year001
pHmaximum≤ 8.3 SUall year001
pHmaximumreport only (SU)Apr, May, Jun, Oct, Nov, Dec001
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≤ 1776 lb/dall year001
Solids, total suspendedweekly average≤ 2665 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, total [as N]rolling average≤ 474 lb/dall year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Apr–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Apr–Oct001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Apr–Oct001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Apr–Oct001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Copper, total [as Cu]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Copper, total [as Cu]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Lead, total [as Pb]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Lead, total [as Pb]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Nickel, total [as Ni]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Nickel, total [as Ni]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Zinc, total [as Zn]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Zinc, total [as Zn]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Aluminum, total [as Al]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
Aluminum, total [as Al]daily maximumreport only (mg/L)Apr, May, Jun, Oct, Nov, Dec001
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 126 CFU/100mLApr–Oct001
E. coli, thermotol, MF, MTECdaily maximum≤ 409 CFU/100mLApr–Oct001
Flow, in conduit or thru treatment plantmonthly average≤ 7.1 MGDall year001
Flow, in conduit or thru treatment plantrolling averagereport only (MGD)all year001
Chlorine, total residualdaily maximum≤ 1 mg/LApr–Oct001
Carbonaceous BOD, 5 day, 20 deg C filtrdmonthly average≤ 25 mg/Lall year001
Carbonaceous BOD, 5 day, 20 deg C filtrdweekly average≤ 40 mg/Lall year001
Carbonaceous BOD, 5 day, 20 deg C filtrddaily maximumreport only (mg/L)all year001
Carbonaceous BOD, 5 day, 20 deg C filtrdmonthly average≤ 1480 lb/dall year001
Carbonaceous BOD, 5 day, 20 deg C filtrdweekly average≤ 2369 lb/dall year001
Carbonaceous BOD, 5 day, 20 deg C filtrdmonthly averagereport only (mg/L)all year001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
LC50 Static Renewal 48Hr Acute Pimephales promelasminimum≥ 50 %Apr, May, Jun, Oct, Nov, Dec001
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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