BRYN MAWR, PA · Chester County
DEERFIELD KNOLL WATER COMPANY Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of June 1, 1995. 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)
- PA1150167
- System type
- Community Water System
- Population served
- 270
- Service connections
- 119
- Ownership
- public/private mix
- Water source
- groundwater (wells)
Violation history
Monitoring, Routine Major (TCR)
—Coliform (TCR)
May 1, 1995 – May 31, 1995
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 1991 – March 31, 1991
ArchivedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 1991 – March 31, 1991
ArchivedMonitoring, Regular
—Carbon tetrachloride
January 1, 1991 – March 31, 1991
ArchivedMonitoring, Regular
—Benzene
January 1, 1991 – March 31, 1991
ArchivedMonitoring, Regular
—Trichloroethylene
January 1, 1991 – March 31, 1991
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
July 1, 1988 – June 30, 1992
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
July 1, 1984 – June 30, 1988
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 |
|---|---|---|---|---|
| May 1, 1995 – May 31, 1995 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 1991 – March 31, 1991 | Monitoring, Regular | 1,1-Dichloroethylene | — | Archived |
| January 1, 1991 – March 31, 1991 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Archived |
| January 1, 1991 – March 31, 1991 | Monitoring, Regular | Carbon tetrachloride | — | Archived |
| January 1, 1991 – March 31, 1991 | Monitoring, Regular | Benzene | — | Archived |
| January 1, 1991 – March 31, 1991 | Monitoring, Regular | Trichloroethylene | — | Archived |
| July 1, 1988 – June 30, 1992 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| July 1, 1984 – June 30, 1988 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- September 30, 1988State Formal Notice of Violation issued1 linked violation
- February 11, 1988State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- August 17, 1987State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
- 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
BRYN MAWR, PA 19010