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Newington Power Facility

Electric Services, major discharger, Newington, New Hampshire. NPDES permit NH0023361 expired Dec 31, 2017; its limits still apply. Last 12 months: over a limit 3 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (18 values), outfall 001 form B quarterly (15 values), outfall 004 form A monthly (4 values), outfall 004 form B quarterly (2 values), outfall 005 form A monthly (4 values), outfall 005 form B quarterly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 4 of 48 reports late

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

Period endingParameterReportedLimitOver by
December 2025Priority Pollutants, daily maximum.0057 mg/L≤ 0 mg/L—
December 2025Priority Pollutants, monthly average.0047 mg/L≤ 0 mg/L—
September 2026LC50 Static 48Hr Acute Menidia, daily minimum45.6 %≥ 50 %9%

Limits in force (47)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximum≤ 95 deg Fall year001
Flow rateinstantaneous minimum≥ 451 gal/minall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Salinitymonthly averagereport only (ppm)all year001
Salinitydaily maximum≤ 66000 ppmall year001
Salinitydaily maximumreport only (mg/L)all year001
Solids, totaldaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]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
Copper, total [as Cu]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
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Zinc, total recoverablemonthly average≤ 1 mg/Lall year001
Zinc, total recoverabledaily maximum≤ 1 mg/Lall year001
Chromium, total recoverablemonthly average≤ .2 mg/Lall year001
Chromium, total recoverabledaily maximum≤ .2 mg/Lall year001
Oxidants, total residualmonthly average≤ 0 mg/Lall year001
Oxidants, total residualdaily maximum≤ 0 mg/Lall year001
Oxidants, total residualdaily maximumreport only (mg/L)all year001
Priority Pollutantsmonthly average≤ 0 mg/LOct–Dec001
Priority Pollutantsdaily maximum≤ 0 mg/LOct–Dec001
Flow, in conduit or thru treatment plantmonthly average≤ 4 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ 4 MGDall year001
Chlorine, free availablemonthly average≤ .2 mg/Lall year001
Chlorine, free availabledaily maximum≤ .5 mg/Lall year001
LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)daily minimum≥ 50 %all year001
LC50 Static 48Hr Acute Menidiadaily minimum≥ 50 %all year001
Noael Static 48Hr Acute Mysid. Bahiadaily minimumreport only (%)all year001
NOAEL Static 48Hr Acute Menidia sp.daily minimumreport only (%)all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year004
Solids, total suspendeddaily maximum≤ 100 mg/Lall year004
Oil & Greasemonthly average≤ 15 mg/Lall year004
Oil & Greasedaily maximum≤ 20 mg/Lall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year004
Solids, total suspendedmonthly average≤ 30 mg/Lall year005
Solids, total suspendeddaily maximum≤ 100 mg/Lall year005
Oil & Greasemonthly average≤ 15 mg/Lall year005
Oil & Greasedaily maximum≤ 20 mg/Lall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year005

How strict are these limits?

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

Same industry: the 6 Electric Services permits in New Hampshire.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NH0023361 · MCP: https://passage-data.com/mcp