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Exeter Town of

Sewage treatment plant, major discharger, Exeter, New Hampshire. NPDES permit NH0100871, in force until Oct 31, 2027. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (26 values), outfall 001 form T quarterly (11 values), outfall 001 form TA quarterly (12 values), outfall 003 form A monthly (3 values), outfall 003 form Q quarterly (3 values), outfall PFAS form E quarterly (4 values), and 3 more forms
Renewal application due
May 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 14 required values missing, 1 of 45 reports late

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

Period endingParameterReportedLimitOver by
December 2025Coliform, fecal - % samples exceeding limit, geometric mean12 %≤ 10 %20%

Limits in force (68)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)Apr–Sep001
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 maximum≤ 50 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 751 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 1251 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 1126 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8 SUall year001
pHdaily maximumreport only (SU)Apr–Sep001
Salinitydaily maximumreport only (ppt)Apr–Sep001
Salinitydaily maximumreport only (ppt)Apr–Sep001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendeddaily maximum≤ 50 mg/Lall year001
Solids, total suspendedmonthly average≤ 751 lb/dall year001
Solids, total suspendeddaily maximum≤ 1251 lb/dall year001
Solids, total suspendedweekly average≤ 1126 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Sep001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Sep001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Apr–Sep001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Apr–Sep001
Arsenic, Inorganicdaily maximumreport only (ug/L)Apr–Sep001
Arsenic, total [as As]daily maximumreport only (ug/L)Apr–Sep001
Arsenic, total [as As]daily maximumreport only (ug/L)Apr–Sep001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Apr–Sep001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Apr–Sep001
Copper, total [as Cu]daily maximumreport only (mg/L)Apr–Sep001
Copper, total [as Cu]daily maximumreport only (mg/L)Apr–Sep001
Lead, total [as Pb]daily maximumreport only (mg/L)Apr–Sep001
Lead, total [as Pb]daily maximumreport only (mg/L)Apr–Sep001
Nickel, total [as Ni]daily maximumreport only (mg/L)Apr–Sep001
Nickel, total [as Ni]daily maximumreport only (mg/L)Apr–Sep001
Zinc, total [as Zn]daily maximumreport only (mg/L)Apr–Sep001
Zinc, total [as Zn]daily maximumreport only (mg/L)Apr–Sep001
Coliform, fecal - % samples exceeding limitgeometric mean≤ 10 %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≤ 3 MGDall year001
Enterococcimonthly geometric mean≤ 35 #/100mLall year001
Enterococcidaily maximum≤ 104 #/100mLall year001
Coliform, fecal generalmonthly geometric mean≤ 14 #/100mLall year001
Coliform, fecal generaldaily maximumreport only (#/100mL)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)monthly average minimum≥ 100 %Apr–Sep001
LC50 Static 48Hr Acute Menidiamonthly average minimum≥ 100 %Apr–Sep001
Temperature, water deg. centigrademonthly totalreport only (deg C)all year003
Durationmonthly totalreport only (hr/mo)all year003
E. colimaximumreport only (k/100mL)all year003
Number of Eventsmonthly totalreport only (#)all year003
Flow, totalmonthly totalreport only (gal)all year003
Enterococcimonthly totalreport only (#/100mL)all year003
Coliform, fecal generalmonthly totalreport only (#/100mL)all year003
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
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
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

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NH0100871 · MCP: https://passage-data.com/mcp