BRYN MAWR, PA · Chester County

AQUA PA LOCUST KNOLL Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of June 30, 2005. 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): PA1150148
System type: Community Water System
Population served: 388
Service connections: 109
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring, Regular
—
Nitrate
April 1, 1996 – June 30, 1996
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1996 – January 1, 1997
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Xylenes, Total
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Styrene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Ethylbenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Toluene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Benzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
CHLOROBENZENE
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Tetrachloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Trichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Carbon tetrachloride
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Xylenes, Total
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Carbon tetrachloride
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Tetrachloroethylene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
CHLOROBENZENE
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Benzene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Toluene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Ethylbenzene
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Styrene
July 1, 1994 – September 30, 1994
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1994 – March 3, 1995
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Toluene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
Xylenes, Total
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
Carbon tetrachloride
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
Trichloroethylene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
Tetrachloroethylene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
CHLOROBENZENE
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
Benzene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 1994 – June 30, 1994
Resolved
Monitoring, Regular
—
Styrene
April 1, 1994 – June 30, 1994
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1994 – April 17, 1995
Resolved
Monitoring, Regular
—
Styrene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Toluene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Benzene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 1994 – March 31, 1994
Resolved
Monitoring, Regular
—
Arsenic
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Barium
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Cadmium
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Chromium
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Fluoride
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Mercury
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Nickel
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Selenium
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 1994 – December 31, 1994
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1993 – March 3, 1995
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1993 – December 31, 1993
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1980 – June 30, 1984
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
April 1, 1996 – June 30, 1996	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1996 – January 1, 1997	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Xylenes, Total	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Styrene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Ethylbenzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Toluene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Benzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	CHLOROBENZENE	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Tetrachloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Trichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Carbon tetrachloride	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
September 1, 1994 – September 30, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Xylenes, Total	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Carbon tetrachloride	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Tetrachloroethylene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Benzene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Toluene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	Styrene	—	Resolved
July 1, 1994 – March 3, 1995	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 1994 – September 30, 1994	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Toluene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Xylenes, Total	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Carbon tetrachloride	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Trichloroethylene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Tetrachloroethylene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	CHLOROBENZENE	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Benzene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 1994 – June 30, 1994	Monitoring, Regular	Styrene	—	Resolved
January 1, 1994 – April 17, 1995	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Styrene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Toluene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Benzene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Arsenic	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Barium	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Cadmium	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Chromium	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Fluoride	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Mercury	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Nickel	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Selenium	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Thallium, Total	—	Resolved
July 1, 1993 – March 3, 1995	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 1993 – December 31, 1993	Monitoring, Regular	Nitrate	—	Resolved
July 1, 1980 – June 30, 1984	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

May 4, 1984State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
April 6, 1984State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 30, 1984State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
May 13, 1983State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 22, 1983State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 29, 1982State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
September 30, 1982Federal issued Formal Notice of Violationgeneral compliance action — not tied to a specific violation on record
September 17, 1982State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
August 27, 1982State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
February 19, 1982State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 19, 1981State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
November 19, 1981State 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 190103489