BRYN MAWR, PA · Chester County

AQUA PA WEST CHESTER Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

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): PA1150098
System type: Community Water System
Population served: 48,600
Service connections: 13,412
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Regular
—
Chlordane
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Dinoseb
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Carbofuran
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Heptachlor epoxide
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
2,4,5-TP
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Endrin
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
BHC-GAMMA
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Methoxychlor
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Toxaphene
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Dalapon
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Endothall
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Simazine
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2020 – March 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2020 – March 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2020 – March 31, 2020
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
January 1, 2020 – March 31, 2020
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2017 – July 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2017 – August 29, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2017 – July 31, 2017
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2007 – August 31, 2007
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2001 – August 31, 2001
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2001 – July 31, 2001
Resolved
Monitoring, Regular
—
Styrene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Xylenes, Total
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Carbon tetrachloride
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Trichloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Tetrachloroethylene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
CHLOROBENZENE
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Benzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Toluene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Ethylbenzene
October 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Benzene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 1992 – March 31, 1992
Archived
Monitoring, Regular
—
Benzene
January 1, 1992 – March 31, 1992
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 1992 – March 31, 1992
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 1992 – March 31, 1992
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1992 – March 31, 1992
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1992 – March 31, 1992
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 1992 – March 31, 1992
Archived
Monitoring, Regular
—
Trichloroethylene
October 1, 1991 – December 31, 1991
Archived
Monitoring, Regular
—
Benzene
October 1, 1991 – December 31, 1991
Archived
Monitoring, Regular
—
p-Dichlorobenzene
October 1, 1991 – December 31, 1991
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 1991 – December 31, 1991
Archived
Monitoring, Regular
—
Carbon tetrachloride
October 1, 1991 – December 31, 1991
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 1991 – March 31, 1991
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 1991 – January 31, 1991
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 1990 – December 31, 1990
Archived
Monitoring, Regular
—
Carbon tetrachloride
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Benzene
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Trichloroethylene
April 1, 1988 – 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
October 1, 2023 – December 31, 2023	Monitoring, Regular	Chlordane	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Dinoseb	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Carbofuran	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Heptachlor epoxide	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	2,4,5-TP	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Endrin	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	BHC-GAMMA	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Methoxychlor	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Toxaphene	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Dalapon	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Endothall	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Simazine	—	Resolved
January 1, 2020 – March 31, 2020	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2020 – March 31, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2020 – March 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2020 – March 31, 2020	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2017 – August 29, 2017	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2007 – August 31, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2001 – August 31, 2001	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2001 – July 31, 2001	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Styrene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Xylenes, Total	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Carbon tetrachloride	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Trichloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Tetrachloroethylene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	CHLOROBENZENE	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Benzene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Toluene	—	Resolved
October 1, 1994 – December 31, 1994	Monitoring, Regular	Ethylbenzene	—	Resolved
October 1, 1992 – December 31, 1992	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Benzene	—	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	Benzene	—	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	Carbon tetrachloride	—	Archived
October 1, 1991 – December 31, 1991	Monitoring, Regular	Trichloroethylene	—	Archived
October 1, 1991 – December 31, 1991	Monitoring, Regular	Benzene	—	Archived
October 1, 1991 – December 31, 1991	Monitoring, Regular	p-Dichlorobenzene	—	Archived
October 1, 1991 – December 31, 1991	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
October 1, 1991 – December 31, 1991	Monitoring, Regular	Carbon tetrachloride	—	Archived
March 1, 1991 – March 31, 1991	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
January 1, 1991 – January 31, 1991	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
December 1, 1990 – December 31, 1990	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Carbon tetrachloride	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Benzene	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	p-Dichlorobenzene	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	1,2-Dichloroethane	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Trichloroethylene	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

February 14, 2024State Compliance achieved30 linked violations
February 2, 2024State Violation/Reminder Notice29 linked violations
February 1, 2024State Violation/Reminder Notice1 linked violation
May 28, 2021State Public Notification received2 linked violations
October 6, 2020State Compliance achieved2 linked violations
October 6, 2020State Public Notification requested2 linked violations
September 21, 2020State Compliance achieved2 linked violations
May 20, 2020State Violation/Reminder Notice2 linked violations
May 19, 2020State Violation/Reminder Notice2 linked violations
May 19, 2020State Violation/Reminder Notice2 linked violations
June 13, 2018State Compliance achieved1 linked violation
June 13, 2018State Public Notification received1 linked violation
June 13, 2018State Public Notification requested1 linked violation
August 29, 2017State Compliance achieved2 linked violations
August 23, 2017State Violation/Reminder Notice1 linked violation
August 23, 2017State Violation/Reminder Notice3 linked violations
September 26, 2007State Violation/Reminder Notice1 linked violation
September 26, 2007State Compliance achieved1 linked violation
April 29, 1987State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record

Contact

AQUA PA WEST CHESTER

610-645-1122

BRYN MAWR, PA 19010