BRYN MAWR, PA · Chester County

AQUA PA UWCHLAN 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): PA1150035
System type: Community Water System
Population served: 35,518
Service connections: 16,600
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
September 1, 2020 – September 30, 2020
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2017 – September 30, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2017 – September 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2017 – September 30, 2017
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Pentachlorophenol
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Fluoride
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Toxaphene
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
2,4-D
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
2,4,5-TP
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Arsenic
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Barium
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Cadmium
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Chromium
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Fluoride
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Mercury
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Nitrate
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Selenium
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Endrin
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
BHC-GAMMA
June 24, 1985 – June 23, 1988
Archived
Monitoring, Regular
—
Methoxychlor
June 24, 1985 – June 23, 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
September 1, 2020 – September 30, 2020	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
September 1, 2017 – September 30, 2017	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2017 – September 30, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	CYANIDE	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Fluoride	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
June 24, 1985 – June 23, 1988	Monitoring, Regular	Toxaphene	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	2,4-D	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	2,4,5-TP	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Arsenic	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Barium	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Cadmium	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Chromium	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Fluoride	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Mercury	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Nitrate	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Selenium	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Endrin	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	BHC-GAMMA	—	Archived
June 24, 1985 – June 23, 1988	Monitoring, Regular	Methoxychlor	—	Archived

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

Enforcement actions

February 3, 2021State Compliance achieved1 linked violation
June 13, 2018State Public Notification requested3 linked violations
June 13, 2018State Public Notification received3 linked violations
June 13, 2018State Compliance achieved3 linked violations
December 7, 2017State Violation/Reminder Notice3 linked violations
May 14, 1991State Formal Notice of Violation issued30 linked violations
February 12, 1991State Formal Notice of Violation issued30 linked violations
September 30, 1988State Formal Notice of Violation issued14 linked violations

Contact

AQUA PA UWCHLAN

610-645-1122

BRYN MAWR, PA 19010