Donaldsons Crossrds STP
Canonsburg, PA · Washington County · Publicly Owned Treatment Works
- Average flow
- 0.35 MGD
- Design flow
- 1.2 MGD
- NPDES permit
- PA0028703
- Expired
- Permit expires
- August 2025
- Population served
- 5,110
- CWNS 2022
Donaldsons Crossrds STP is a publicly owned wastewater treatment works in Canonsburg, Washington County, Pennsylvania treating an average of 0.35 million gallons per day against a permitted design capacity of 1.2 MGD, serving about 5,110 residents. Treatment on site includes clarifiers. It discharges under NPDES permit PA0028703 (expired), which expires in August 2025, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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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 Donaldsons Crossrds STP.
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Nearby wastewater treatment plants in Pennsylvania
Canonsburg · 2 mi away
0.89 MGD
Bridgeville · 3 mi away
0.02 MGD
Canonsburg · 5 mi away
0.06 MGD
Cecil · 5 mi away
0.12 MGD
Eighty Four · 6 mi away
0.01 MGD
Pittsburgh · 8 mi away
3.22 MGD
Washington · 8 mi away
4.51 MGD
Clairton · 9 mi away
1.83 MGD
Donaldsons Crossrds 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 February 27, 2025.