Westtown-Chester Creek STP
904 Westtown Rd, Westchester, PA 19382 · Chester County · Publicly Owned Treatment Works
- Average flow
- 0.24 MGD
- Design flow
- 0.5 MGD
- NPDES permit
- PA0031771
- Effective
- Permit expires
- March 2031
- Population served
- 3,595
- CWNS 2022
Westtown-Chester Creek STP is a publicly owned wastewater treatment works in Westchester, Chester County, Pennsylvania treating an average of 0.24 million gallons per day against a permitted design capacity of 0.5 MGD, serving about 3,595 residents. It discharges under NPDES permit PA0031771 (effective), which expires in March 2031, with 3 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Westtown-Chester Creek STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Westtown-Chester Creek STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Westtown-Chester Creek STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Pennsylvania
West Chester · 1 mi away
3.35 MGD
West Chester · 2 mi away
0.84 MGD
Cheyney · 2 mi away
0.1 MGD
West Chester · 3 mi away
0.27 MGD
West Chester · 4 mi away
0.75 MGD
Glen Mills · 5 mi away
1.14 MGD
Chadds Ford · 6 mi away
0.11 MGD
Brookhaven · 10 mi away
0.15 MGD
Westtown-Chester Creek 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 November 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms