Dauphin STP
200 Church St., PO Box 487, Dauphin, PA 17018 · Dauphin County · Publicly Owned Treatment Works
- Average flow
- 0.09 MGD
- Design flow
- 0.2 MGD
- NPDES permit
- PA0024350
- Effective
- Permit expires
- June 2029
- Population served
- —
- CWNS 2022
Dauphin STP is a publicly owned wastewater treatment works in Dauphin, Dauphin County, Pennsylvania treating an average of 0.09 million gallons per day against a permitted design capacity of 0.2 MGD. It discharges under NPDES permit PA0024350 (effective), which expires in June 2029, with 4 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Dauphin STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Dauphin STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Pennsylvania
Marysville · 2 mi away
0.26 MGD
Duncannon · 3 mi away
0.05 MGD
Duncannon · 5 mi away
0.0081 MGD
Duncannon · 5 mi away
0.39 MGD
Halifax · 7 mi away
0.09 MGD
Camp Hill · 7 mi away
1.94 MGD
Mechanicsburg · 7 mi away
3.01 MGD
Mechanicsburg · 9 mi away
0.77 MGD
Dauphin STP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 12, 2026; facility record last updated January 23, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms