Silver Spring Twp STP
Mechanicsburg, PA · Cumberland County · Publicly Owned Treatment Works
- Average flow
- 0.75 MGD
- Design flow
- 2.4 MGD
- NPDES permit
- PA0083593
- Administratively continued
- Permit expires
- June 2026
- Population served
- —
- CWNS 2022
Silver Spring Twp STP is a publicly owned wastewater treatment works in Mechanicsburg, Cumberland County, Pennsylvania treating an average of 0.75 million gallons per day against a permitted design capacity of 2.4 MGD. It discharges under NPDES permit PA0083593 (administratively continued), which expires in June 2026, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Silver Spring Twp STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Pennsylvania
Mechanicsburg · 2 mi away
2.79 MGD
Camp Hill · 5 mi away
1.35 MGD
Lemoyne · 7 mi away
0.22 MGD
Mechanicsburg · 7 mi away
0.67 MGD
Duncannon · 7 mi away
0.05 MGD
Carlisle · 7 mi away
2.28 MGD
New Cumberland · 7 mi away
4.33 MGD
Marysville · 8 mi away
0.19 MGD
Silver Spring Twp 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 September 11, 2026; facility record last updated November 28, 2025.