Clean Water Act discharge permit · NPDES PA0053473
THORNBURY TOWNSHIP STP, Cheyney, PA: NPDES PA0053473 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
THORNBURY TOWNSHIP STP, held by THORNBURY TWP DELAWARE CNTY, holds NPDES permit PA0053473, which discharges to Chester Creek. EPA’s file records it issued November 3, 2020 and expiring November 30, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | THORNBURY TOWNSHIP STP |
|---|---|
| Permittee as filed | THORNBURY TWP DELAWARE CNTY |
| NPDES ID | PA0053473 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 3, 2020 |
| Expiration date | November 30, 2025 |
| Issuing agency | State Environmental Organization |
| Address | Cheyney, PA 19319 |
| Receiving water | Chester Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Chester Creek (HUC 020402020605) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 14Pollutants on file
- 13Under a numeric limit
- 14With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 2 | 10 | 6 | January 31, 2026 | 167% over the limit |
| Solids, total suspended | 6 | 14 | 2 | February 28, 2018 | 91% over the limit |
| Coliform, fecal general | 4 | 6 | 2 | June 30, 2019 | 142% over the limit |
| Phosphorus, total [as P] | 2 | 6 | 2 | January 31, 2019 | 25% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 13 | 1 | January 31, 2024 | 33% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 4 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 4 | 0 | ||
| pH | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Nitrogen, total [as N] | 1 | 3 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| Copper, total [as Cu] | 1 | 1 | 0 | ||
| Solids, total dissolved | 1 | 1 | 0 | ||
| E. coli | 0 | 1 | 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 PA0053473.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, PA0053473.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 PA0053473 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.