Colonial Jt Sew Auth - Grindstone STP
Grindstone, PA · Fayette County · Publicly Owned Treatment Works
- Average flow
- 0.04 MGD
- Design flow
- 0.16 MGD
- NPDES permit
- PA0219266
- Expired
- Permit expires
- April 2025
- Population served
- —
- CWNS 2022
Colonial Jt Sew Auth - Grindstone STP is a publicly owned wastewater treatment works in Grindstone, Fayette County, Pennsylvania treating an average of 0.04 million gallons per day against a permitted design capacity of 0.16 MGD. It discharges under NPDES permit PA0219266 (expired), which expires in April 2025, with 18 recorded violations 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
- 18
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Colonial Jt Sew Auth - Grindstone STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Pennsylvania
Smock · 3 mi away
0.03 MGD
Grindstone · 3 mi away
0.15 MGD
California · 5 mi away
0.44 MGD
Newell · 5 mi away
0.04 MGD
Smock · 6 mi away
0.05 MGD
Daisytown · 6 mi away
0.02 MGD
New Salem · 6 mi away
0.05 MGD
Allenport · 6 mi away
0.17 MGD
Colonial Jt Sew Auth - Grindstone 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 October 2, 2025.