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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	PA1150098
PWS Name	AQUA PA WEST CHESTER
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	48600
County Served	Chester

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	2403936	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	2403910	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	2403909	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	2403935	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	2403937	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	2403933	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	2403932	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	2403931	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	2403930	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	2403929	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	2403934	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	2403928	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	2403927	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	2403926	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	2403925	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	2403924	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	2403923	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	2403922	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	2403921	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	2403920	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	2403919	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	2403918	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	2403917	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	2403916	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	2403915	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	2403914	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	2403913	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	2403912	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	2403911	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	2403908	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	2016885	Returned to Compliance	01-JAN-2020	31-MAR-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2016883	Returned to Compliance	01-JAN-2020	31-MAR-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	2016884	Returned to Compliance	01-JAN-2020	31-MAR-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	2016886	Returned to Compliance	01-JAN-2020	31-MAR-2020	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1729679	Returned to Compliance	01-JUL-2017	31-JUL-2017	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1729678	Returned to Compliance	01-JUL-2017	30-SEP-2017	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	1729680	Returned to Compliance	01-JUL-2017	31-JUL-2017	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	0725871	Returned to Compliance	01-AUG-2007	31-AUG-2007	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	0134026	Returned to Compliance	01-AUG-2001	31-AUG-2001	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	0133136	Returned to Compliance	01-JUL-2001	31-JUL-2001	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	01V0001	Returned to Compliance	01-JUL-2001	13-AUG-2001	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	0102953	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	0102952	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	9512703	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	9512684	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	9512702	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	9512701	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	9512700	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	9512699	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	9512698	Returned to Compliance	01-OCT-1994	31-DEC-1994	No

1 - 50 of 96

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
240390886002	2403917	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403936	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403935	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403934	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403933	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403932	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403931	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403930	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403929	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403928	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403908	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403909	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403910	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403911	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403912	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403913	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403914	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403915	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403916	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403937	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403918	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403919	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403920	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403921	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403922	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403923	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403924	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403925	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403926	SOX	State Compliance achieved	14-FEB-2024	State	-
240390886002	2403927	SOX	State Compliance achieved	14-FEB-2024	State	-
211688563001	2016886	SIF	State Public Notification received	28-MAY-2021	State	-
211688563001	2016885	SIF	State Public Notification received	28-MAY-2021	State	-
201688362001	2016883	SOX	State Compliance achieved	21-SEP-2020	State	-
201688362001	2016884	SOX	State Compliance achieved	21-SEP-2020	State	-
182967945001	1729679	SOX	State Compliance achieved	13-JUN-2018	State	-
172967844001	1729680	SOX	State Compliance achieved	29-AUG-2017	State	-
172967844001	1729678	SOX	State Compliance achieved	29-AUG-2017	State	-
072587173031	0725871	SOX	State Compliance achieved	26-SEP-2007	State	-
01E0006	0134026	SOX	State Compliance achieved	20-NOV-2001	State	-
01E0004	0133136	SOX	State Compliance achieved	25-SEP-2001	State	-
0100085	01V0001	EOX	Federal Compliance achieved	13-AUG-2001	ODSWeb	-
01E0002	0102952	SOX	State Compliance achieved	06-MAR-2001	State	-
01E0002	0102953	SOX	State Compliance achieved	06-MAR-2001	State	-
95E0001	9512684	SOX	State Compliance achieved	04-MAY-1995	State	-
95E0001	9512698	SOX	State Compliance achieved	04-MAY-1995	State	-
95E0001	9512699	SOX	State Compliance achieved	04-MAY-1995	State	-
95E0001	9512700	SOX	State Compliance achieved	04-MAY-1995	State	-
95E0001	9512697	SOX	State Compliance achieved	04-MAY-1995	State	-
95E0001	9512696	SOX	State Compliance achieved	04-MAY-1995	State	-
95E0001	9512695	SOX	State Compliance achieved	04-MAY-1995	State	-

1 - 50 of 89

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CHESTER WATER AUTH	014	Yes	Consecutive Connection	Surface water	Emergency	Active
WILOWDALE WELL #6	013	Yes	Well	Ground water	Permanent	Active
EMBREEVILLE WELL #2	020	Yes	Well	Ground water	Other	Inactive
POMONA PARK 2	008	Yes	Well	Ground water	Other	Inactive
WILOWDALE WELL #02	012	Yes	Well	Ground water	Interim	Active
POMONA PARK 1	007	Yes	Well	Ground water	Interim	Active
WHITE WELL# 5	005	Yes	Well	Ground water	Interim	Active
WHITE WELL# 4	004	Yes	Well	Ground water	Interim	Active
WHITE WELL# 2	003	Yes	Well	Ground water	Interim	Active
WHITE WELL#1	002	Yes	Well	Ground water	Interim	Active
AQUA PA MAIN	010	Yes	Consecutive Connection	Surface water	Other	Inactive
AQUA PA MAIN	011	Yes	Consecutive Connection	Surface water	Other	Inactive
AQUA PA MAIN	009	Yes	Consecutive Connection	Surface water	Permanent	Active
FERN HILL RESERVOIR	006	Yes	Intake	Surface water	Other	Inactive
E BR BRANDYWINE CK	001	Yes	Intake	Surface water	Permanent	Active
INGRAMS MILL PLANT	101	No	Sampling Station	-	-	Active
WHITE WELL	102	No	Sampling Station	-	-	Active
POMONA PARK	104	No	Sampling Station	-	-	Active
WILLOWDALE	105	No	Sampling Station	-	-	Active
CWA POCOPSON	106	No	Sampling Station	-	-	Active
AQ MAIN OAKBOURNE	107	No	Sampling Station	-	-	Active
AQ MAIN FARREN LN	108	No	Sampling Station	-	-	Active
AQ MAIN BRMHNGHM RD	109	No	Sampling Station	-	-	Active
FERN HILL WTP	103	No	Sampling Station	-	-	Inactive
INGRAM'S MILL	300	No	Treatment Plant	-	-	Active
WHITE WELLS	301	No	Treatment Plant	-	-	Active
POMONA PARK	303	No	Treatment Plant	-	-	Active
WILLOWDALE PLANT	304	No	Treatment Plant	-	-	Active
UNIONVILLE BOOSTER	305	No	Treatment Plant	-	-	Active
FERN HILL	302	No	Treatment Plant	-	-	Inactive

1 - 30 of 30

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
INGRAM'S MILL	300	Gaseous Chlorination, Post	Disinfection
INGRAM'S MILL	300	Coagulation	Particulate removal
INGRAM'S MILL	300	Rapid Mix	Particulate removal
INGRAM'S MILL	300	Flocculation	Particulate removal
INGRAM'S MILL	300	Sedimentation	Particulate removal
INGRAM'S MILL	300	Fluoridation	Other
INGRAM'S MILL	300	Inhibitor, Orthophosphate	Corrosion control
INGRAM'S MILL	300	Filtration, Rapid Sand	Particulate removal
INGRAM'S MILL	300	Innovative	Other
INGRAM'S MILL	300	pH Adjustment	Corrosion control
INGRAM'S MILL	300	pH Adjustment, Post	Corrosion control
INGRAM'S MILL	300	Activated Carbon, Granular	Taste / odor control
INGRAM'S MILL	300	Permanganate	Iron removal
WHITE WELLS	301	Hypochlorination, Pre	Disinfection
WHITE WELLS	301	Inhibitor, Orthophosphate	Corrosion control
FERN HILL	302	Hypochlorination, Post	Disinfection
FERN HILL	302	pH Adjustment, Pre	Particulate removal
FERN HILL	302	pH Adjustment, Post	Corrosion control
FERN HILL	302	pH Adjustment, Pre	Particulate removal
FERN HILL	302	Permanganate	Iron removal
FERN HILL	302	Innovative	Other
POMONA PARK	303	Hypochlorination, Pre	Disinfection
POMONA PARK	303	pH Adjustment, Post	Corrosion control
POMONA PARK	303	Inhibitor, Bimetallic Phospate	Corrosion control
WILLOWDALE PLANT	304	Hypochlorination, Post	Disinfection
WILLOWDALE PLANT	304	Inhibitor, Orthophosphate	Corrosion control
WILLOWDALE PLANT	304	4-Log Treatment of Viruses	Disinfection
UNIONVILLE BOOSTER	305	Hypochlorination, Post	Disinfection

1 - 28 of 28

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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