Clean Water Act discharge permit · NPDES PA0021245
DUNCANNON STP, Duncannon, PA: NPDES PA0021245 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 18Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
DUNCANNON STP, held by DUNCANNON BORO MUNI AUTH PERRY CNTY, holds NPDES permit PA0021245, which discharges to Susquehanna River. EPA’s file records it issued June 28, 2018 and expiring June 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | DUNCANNON STP |
|---|---|
| Permittee as filed | DUNCANNON BORO MUNI AUTH PERRY CNTY |
| NPDES ID | PA0021245 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 28, 2018 |
| Expiration date | June 30, 2023 |
| Issuing agency | State Environmental Organization |
| Address | Duncannon, PA 17020 |
| Receiving water | Susquehanna River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Cove Creek-Susquehanna River (HUC 020503051006) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 18Under a numeric limit
- 19With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 2 | 45 | 37 | February 28, 2026 | 138% over the limit |
| Solids, total suspended | 7 | 51 | 23 | March 31, 2024 | 146% over the limit |
| Coliform, fecal general | 4 | 30 | 22 | August 31, 2025 | 99,999% over the limit |
| Phosphorus, Total | 4 | 9 | 1 | September 30, 2024 | 24% over the limit |
| pH | 2 | 9 | 1 | July 31, 2015 | |
| Chlorine, total residual | 2 | 9 | 1 | December 31, 2021 | 40% over the limit |
| Oxygen, dissolved [DO] | 1 | 5 | 1 | March 31, 2012 | 20% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 16 | 0 | ||
| BOD, 5-day, 20 deg. C | 3 | 12 | 0 | ||
| Nitrogen, Total | 4 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 8 | 0 | ||
| Nitrogen, Ammonia Total | 2 | 6 | 0 | ||
| Nitrogen, total [as N] | 1 | 4 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 4 | 0 | ||
| Nitrogen, Kjeldahl Total | 1 | 4 | 0 | ||
| Nitrite Plus Nitrate Total | 1 | 4 | 0 | ||
| E. coli | 0 | 2 | 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 PA0021245.
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 PA0021245 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.