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PCC Structurals Inc

Aluminum Foundries, major discharger, Northfield, New Hampshire. NPDES permit NH0001023 expired Sep 30, 2023; its limits still apply. Last 12 months: over a limit 2 times (last August 2026), 2 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (8 values), form T quarterly (20 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 3 of 16 reports late

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

Period endingParameterReportedLimitOver by
July 2026Temperature, water deg. fahrenheit, instantaneous maximum91.6 deg F≤ 90 deg F2%
August 2026Temperature, water deg. fahrenheit, instantaneous maximum90.3 deg F≤ 90 deg F0%

Limits in force (28)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Temperature, water deg. fahrenheitinstantaneous maximum≤ 90 deg Fall year
Temperature, water deg. fahrenheitmaximumreport only (deg F)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8 SUall year
pHmaximumreport only (SU)all year
Ammonia, unionizeddaily maximumreport only (mg/L)all year
Ammonia, unionizeddaily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Lead, total [as Pb]daily maximumreport only (mg/L)all year
Lead, total [as Pb]daily maximumreport only (mg/L)all year
Nickel, total [as Ni]daily maximumreport only (mg/L)all year
Nickel, total [as Ni]daily maximumreport only (mg/L)all year
Zinc, total [as Zn]daily maximumreport only (mg/L)all year
Zinc, total [as Zn]daily maximumreport only (mg/L)all year
Aluminum, total [as Al]daily maximumreport only (mg/L)all year
Aluminum, total [as Al]daily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximum≤ .22 MGDall year
Number of Eventsmonthly totalreport only (# exceed)all year
Number of Eventsmonthly totalreport only (# exceed)all year
NOEC Static Renewal 7Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year
NOEC Static Renewal 7Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year

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/NH0001023 · MCP: https://passage-data.com/mcp