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Highway Materials LLC

Industrial or other facility, Flourtown, Pennsylvania. NPDES permit PA0012904, in force until Jun 18, 2027. Last 12 months: over a limit 3 times (last January 2026), 60 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (10 values), outfall 002 form A quarterly (10 values), outfall 001 form Y yearly, outfall 002 form Y yearly
Renewal application due
Dec 20, 2026 · 180 days before expiry; your permit may set another date
Last report on file
March 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 26 reports late

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

Period endingParameterReportedLimitOver by
January 2026Solids, total suspended, daily maximum148.4 mg/L≤ 70 mg/L112%
January 2026Solids, total suspended, instantaneous maximum255 mg/L≤ 90 mg/L183%
January 2026Solids, total suspended, monthly average57.7 mg/L≤ 35 mg/L65%

Limits in force (22)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year001
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 35 mg/Lall year001
Solids, total suspendeddaily maximum≤ 70 mg/Lall year001
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year001
Oil & Greaseinstantaneous maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly average≤ 10.08 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ 10.08 MGDall year001
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year001
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Alkalinity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year002
Acidity, total [as CaCO3]instantaneous maximumreport only (mg/L)all year002
Solids, total suspendedmonthly average≤ 35 mg/Lall year002
Solids, total suspendeddaily maximum≤ 70 mg/Lall year002
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year002
Oil & Greaseinstantaneous maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly average≤ 10.08 MGDall year002
Flow, in conduit or thru treatment plantdaily maximum≤ 10.08 MGDall year002
Alkalinity - Acidity [as CaCO3]instantaneous minimum≥ 0 mg/Lall year002

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/PA0012904 · MCP: https://passage-data.com/mcp