Clean Water Act discharge permit · NPDES PA0594148
HEIDLEBERG MATERIALS NE DOWNINGTOWN QUARRY, Exton, PA: NPDES PA0594148 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
HEIDLEBERG MATERIALS NE DOWNINGTOWN QUARRY, held by HEIDELBERG MATERIALS NE LLC, holds NPDES permit PA0594148, which discharges to Valley Creek. EPA’s file records it issued April 18, 2024 and expiring April 18, 2029. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | HEIDLEBERG MATERIALS NE DOWNINGTOWN QUARRY |
|---|---|
| Permittee as filed | HEIDELBERG MATERIALS NE LLC |
| NPDES ID | PA0594148 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 18, 2024 |
| Expiration date | April 18, 2029 |
| Issuing agency | State Environmental Organization |
| Address | Exton, PA 19341 |
| Receiving water | Valley Creek |
| Subwatershed | Valley Creek (HUC 020402050104) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 7Pollutants on file
- 6Under a numeric limit
- 7With a violation of any kind
- 3With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 2 | 65 | 22 | December 31, 2025 | 101% over the limit |
| Solids, total suspended | 3 | 53 | 2 | July 31, 2022 | 31% over the limit |
| Alkalinity - Acidity [as CaCO3] | 1 | 6 | 1 | June 30, 2024 | 2,147,483,650% over the limit |
| pH | 2 | 34 | 0 | ||
| Turbidity | 0 | 9 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 5 | 0 | ||
| Acidity, total [as CaCO3] | 1 | 5 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES PA0594148.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID PA0594148 there.
Nearby on the register
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- Every permit record in Exton, A to Z
- Discharge permits in Pennsylvania
- Every permit record in Pennsylvania, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.