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Heidelberg Materials Northeast LLC

Industrial or other facility, Exton, Pennsylvania. NPDES permit PA0594148, in force until Mar 15, 2029. Last 12 months: over a limit 2 times (last December 2025), 39 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (26 values), form Y yearly
Last report on file
March 2026
Oct 2024 – Sep 2025
12 values over a limit, 10 required values missing, 4 of 13 reports late

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

Period endingParameterReportedLimitOver by
December 2025Flow, in conduit or thru treatment plant, daily maximum4.31 MGD≤ 4 MGD8%
December 2025Flow, in conduit or thru treatment plant, monthly average4.31 MGD≤ 4 MGD8%

Limits in force (27)

ParameterStatisticLimitMonths
Turbiditymonthly average≤ 40 NTUall year
Turbiditymonthly average≤ 40 NTUall year
Turbiditydaily maximum≤ 80 NTUall year
Turbiditydaily maximum≤ 80 NTUall year
Turbidityinstantaneous maximum≤ 100 NTUall year
Turbidityinstantaneous maximum≤ 100 NTUall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous maximum≤ 9 SUall year
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 35 mg/Lall year
Solids, total suspendedmonthly average≤ 35 mg/Lall year
Solids, total suspendeddaily maximum≤ 70 mg/Lall year
Solids, total suspendeddaily maximum≤ 70 mg/Lall year
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year
Oil & Greaseinstantaneous maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 4 MGDall year
Flow, in conduit or thru treatment plantmonthly average≤ 4 MGDall year
Flow, in conduit or thru treatment plantdaily maximum≤ 4 MGDall year
Flow, in conduit or thru treatment plantdaily maximum≤ 4 MGDall year
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year

Cited limits by parameter: Pennsylvania'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/PA0594148 · MCP: https://passage-data.com/mcp