California Boro STP
First & Mechanic Streets, California, PA 15419 · Washington County · Publicly Owned Treatment Works
- Average flow
- 0.53 MGD
- Design flow
- 1.2 MGD
- NPDES permit
- PA0022241
- Expired
- Permit expires
- April 2026
- Population served
- 7,983
- CWNS 2022
California Boro STP is a publicly owned wastewater treatment works in California, Washington County, Pennsylvania treating an average of 0.53 million gallons per day against a permitted design capacity of 1.2 MGD, serving about 7,983 residents. It discharges under NPDES permit PA0022241 (expired), which expires in April 2026, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at California Boro STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at California Boro STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Pennsylvania
Newell · 1 mi away
0.05 MGD
Daisytown · 2 mi away
0.02 MGD
Allenport · 4 mi away
0.34 MGD
Fayette City · 4 mi away
0.1 MGD
Belle Vernon · 4 mi away
0.49 MGD
Grindstone · 5 mi away
0.06 MGD
Richeyville · 5 mi away
0.12 MGD
Labelle · 6 mi away
0.18 MGD
California Boro 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 December 19, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms