BRYN MAWR, PA · Chester County
AQUA PA WILLOWDALE Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of January 1, 2019. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in Chester County, PA.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Pennsylvania’s official records. Always confirm current status with Pennsylvania before making decisions based on this information.
System facts
- System ID (PWSID)
- PA1150205
- System type
- Community Water System
- Population served
- 1,300
- Service connections
- 779
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
AQUA PA WILLOWDALE is one of 757 community water systems in Pennsylvania in the 501 to 3,300 people size category, formerly serving 1,300 people from surface water.
EPA's federal records list this system as inactive in 2019; the record below is historical.
As of August 1, 2026, its federal record holds 19 entries between 1995 and 2012, all of which EPA lists as closed. Nothing has been added since 2012.
All 19 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves inorganic chemicals, synthetic organic chemicals, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.
Violation history
Monitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
July 1, 2012 – September 30, 2012
ResolvedMonitoring and Reporting (DBP)
—TTHM
July 1, 2012 – September 30, 2012
ResolvedMonitoring, Regular
—2,4,5-TP
July 1, 2011 – September 30, 2011
ResolvedMonitoring, Regular
—Chromium
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—CYANIDE
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Fluoride
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Mercury
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Nickel
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Selenium
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Antimony, Total
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Beryllium, Total
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Thallium, Total
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Arsenic
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Barium
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Cadmium
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
April 1, 1998 – April 2, 1998
ResolvedMonitoring, Regular
—Picloram
October 1, 1995 – December 31, 1995
ResolvedMonitoring, Regular
—2,4-D
October 1, 1995 – December 31, 1995
ResolvedMonitoring, Regular
—Pentachlorophenol
October 1, 1995 – December 31, 1995
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2012 – September 30, 2012 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| July 1, 2012 – September 30, 2012 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| July 1, 2011 – September 30, 2011 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Chromium | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | CYANIDE | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Fluoride | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Mercury | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Nickel | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Selenium | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Antimony, Total | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Beryllium, Total | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Thallium, Total | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Barium | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Cadmium | — | Resolved |
| April 1, 1998 – April 2, 1998 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| October 1, 1995 – December 31, 1995 | Monitoring, Regular | Picloram | — | Resolved |
| October 1, 1995 – December 31, 1995 | Monitoring, Regular | 2,4-D | — | Resolved |
| October 1, 1995 – December 31, 1995 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- April 22, 2014State Violation/Reminder Notice2 linked violations
- April 22, 2014State Compliance achieved2 linked violations
- December 20, 2011State Violation/Reminder Notice1 linked violation
- December 20, 2011State Compliance achieved1 linked violation
Last known contact on file (system is inactive)
AQUA PA WILLOWDALE
610-645-1122
BRYN MAWR, PA 19010