BYRN MAWR, PA · Chester County
PSW LARESERVE Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of October 25, 2000. 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 July 4, 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)
- PA1150180
- System type
- Community Water System
- Population served
- 210
- Service connections
- 70
- Ownership
- privately owned
- Water source
- groundwater (wells)
Violation history
Monitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—ETHYLENE DIBROMIDE
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Benzo(a)pyrene
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—LASSO
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Simazine
January 1, 1996 – December 31, 1996
ResolvedOCCT/SOWT Study/Recommendation
Health-basedLead and Copper Rule
January 1, 1995 – January 28, 1998
ResolvedMonitoring, Regular
—Arsenic
June 24, 1988 – June 23, 1991
ArchivedMonitoring, Regular
—Selenium
June 24, 1988 – June 23, 1991
ArchivedMonitoring, Regular
—Nitrate
June 24, 1988 – June 23, 1991
ArchivedMonitoring, Regular
—Mercury
June 24, 1988 – June 23, 1991
ArchivedMonitoring, Regular
—Fluoride
June 24, 1988 – June 23, 1991
ArchivedMonitoring, Regular
—Chromium
June 24, 1988 – June 23, 1991
ArchivedMonitoring, Regular
—Cadmium
June 24, 1988 – June 23, 1991
ArchivedMonitoring, Regular
—Barium
June 24, 1988 – June 23, 1991
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | ETHYLENE DIBROMIDE | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | LASSO | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Simazine | — | Resolved |
| January 1, 1995 – January 28, 1998 | OCCT/SOWT Study/Recommendation | Lead and Copper Rule | Health-based | Resolved |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Arsenic | — | Archived |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Selenium | — | Archived |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Nitrate | — | Archived |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Mercury | — | Archived |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Fluoride | — | Archived |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Chromium | — | Archived |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Cadmium | — | Archived |
| June 24, 1988 – June 23, 1991 | Monitoring, Regular | Barium | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- August 15, 1991State Formal Notice of Violation issued8 linked violations
- July 6, 1987State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
Last known contact on file (system is inactive)
Not on record
610-525-1400
BYRN MAWR, PA 190103489