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Hooksett W W T F

Sewage treatment plant, major discharger, Hooksett, New Hampshire. NPDES permit NH0100129 expired Sep 30, 2018; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (27 values), form B quarterly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 14 reports late

Limits in force (38)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 275 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 460 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly average≤ 413 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendeddaily maximum≤ 50 mg/Lall year
Solids, total suspendedmonthly average≤ 275 lb/dall year
Solids, total suspendeddaily maximum≤ 460 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 413 lb/dall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Sep
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Apr–Sep
Arsenic, total recoverablemonthly averagereport only (mg/L)all year
Nickel, total recoverabledaily maximumreport only (mg/L)Apr–Sep
Zinc, total recoverabledaily maximumreport only (mg/L)Apr–Sep
Aluminum, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Aluminum, total recoverabledaily maximumreport only (mg/L)Apr–Sep
Cadmium, total recoverabledaily maximumreport only (mg/L)Apr–Sep
Lead, total recoverabledaily maximumreport only (mg/L)Apr–Sep
Chromium, total recoverabledaily maximumreport only (mg/L)Apr–Sep
Copper, total recoverabledaily maximumreport only (mg/L)Apr–Sep
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ 1 mg/Lall year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year
E. coli, colony forming units [CFU]monthly geometric mean≤ 126 CFU/100mLall year
E. coli, colony forming units [CFU]daily maximum≤ 406 CFU/100mLall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimum≥ 50 %Apr–Sep
LC50 Static 48Hr Acute Pimephales promelasdaily minimum≥ 50 %Apr–Sep

How strict are these limits?

Cited limits by parameter: New Hampshire'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/NH0100129 · MCP: https://passage-data.com/mcp