Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	PA1150026
PWS Name	DOWNINGTOWN WATER AUTHORITY
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	9900
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, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	2529233	Known	01-SEP-2025	30-SEP-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	2529486	Known	01-JUL-2025	30-SEP-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	2403885	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	2403884	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	2403883	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	2403902	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	2403901	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	2403900	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	2403899	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	2403898	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	2403897	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	2403896	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	2403895	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	2403894	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	2403893	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	2403892	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	2403891	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	2403890	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	2403889	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	2403888	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	2403887	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	2403886	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2225626	Returned to Compliance	01-APR-2022	30-JUN-2022	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	2200057	Returned to Compliance	01-OCT-2021	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1816175	Returned to Compliance	01-JAN-2018	31-MAR-2018	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1715323	Returned to Compliance	01-FEB-2017	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1716669	Returned to Compliance	01-JAN-2017	31-MAR-2017	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1620587	Returned to Compliance	01-JAN-2016	31-MAR-2016	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1611414	Returned to Compliance	01-OCT-2015	31-DEC-2015	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1525631	Returned to Compliance	01-AUG-2015	31-AUG-2015	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	1503033	Returned to Compliance	01-OCT-2014	31-DEC-2014	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	1500061	Returned to Compliance	01-OCT-2014	31-OCT-2014	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	1503035	Returned to Compliance	01-OCT-2014	31-DEC-2014	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	1503034	Returned to Compliance	01-OCT-2014	31-DEC-2014	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1424414	Returned to Compliance	10-AUG-2014	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1434270	Returned to Compliance	01-JUL-2014	30-SEP-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1424411	Returned to Compliance	01-APR-2014	30-JUN-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1424412	Returned to Compliance	01-APR-2014	30-JUN-2014	No
TT	Treatment Technique Precursor Removal	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1424413	Returned to Compliance	01-APR-2014	30-JUN-2014	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	1416643	Returned to Compliance	01-MAR-2014	31-MAR-2014	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1415860	Returned to Compliance	11-FEB-2014	-	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	1503030	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	1503024	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	1503029	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	1503028	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	1503027	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	1503026	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	1503025	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	1503023	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	1503022	Returned to Compliance	01-JAN-2014	31-DEC-2014	No

1 - 50 of 131

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
26294867	2529486	SFJ	State Formal Notice of Violation issued	12-NOV-2025	State	-
25292336	2529233	SIA	State Violation/Reminder Notice	25-SEP-2025	State	-
240388386003	2403883	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403902	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403885	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403886	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403887	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403888	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403889	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403890	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403891	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403892	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403893	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403894	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403895	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403896	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403897	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403898	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403899	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403900	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403901	SOX	State Compliance achieved	07-FEB-2024	State	-
240388386003	2403884	SOX	State Compliance achieved	07-FEB-2024	State	-
232562675001	2225626	SIF	State Public Notification received	02-JUN-2023	State	-
220005774001	2200057	SOX	State Compliance achieved	07-DEC-2021	State	-
181617551001	1816175	SOX	State Compliance achieved	02-JUL-2018	State	-
171666944005	1716669	SOX	State Compliance achieved	12-MAY-2017	State	-
171532344004	1715323	SOX	State Compliance achieved	08-MAY-2017	State	-
172058738001	1620587	SOX	State Compliance achieved	21-FEB-2017	State	-
161141437002	1611414	SOX	State Compliance achieved	27-SEP-2016	State	-
162563131001	1525631	SOX	State Compliance achieved	27-OCT-2015	State	-
150302232003	1503026	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503032	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503031	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503022	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503023	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503024	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503025	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503027	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503028	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503029	SOX	State Compliance achieved	09-APR-2015	State	-
150302232003	1503030	SOX	State Compliance achieved	09-APR-2015	State	-
150303332014	1503033	SOX	State Compliance achieved	20-FEB-2015	State	-
150303332014	1503035	SOX	State Compliance achieved	20-FEB-2015	State	-
150303332014	1503034	SOX	State Compliance achieved	20-FEB-2015	State	-
150006132001	1500061	SOX	State Compliance achieved	03-DEC-2014	State	-
153427026003	1434270	SOX	State Compliance achieved	13-NOV-2014	State	-
152441126001	1424414	SOX	State Compliance achieved	15-OCT-2014	State	-
152441126001	1424413	SOX	State Compliance achieved	15-OCT-2014	State	-
152441126001	1424411	SOX	State Compliance achieved	15-OCT-2014	State	-
142441226011	1424412	SOX	State Compliance achieved	26-SEP-2014	State	-

1 - 50 of 127

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
AQUA PA UWCHLAN INTC	004	Yes	Consecutive Connection	Ground water	Emergency	Active
WELL DPW 1	007	Yes	Well	Ground water	Permanent	Active
ROCK RAYMOND INTCNT	005	Yes	Consecutive Connection	Ground water	Other	Inactive
LLOYD AVENUE INTC	006	Yes	Consecutive Connection	Surface water	Other	Inactive
E BR BRANDYWINE CK	003	Yes	Intake	Surface water	Permanent	Active
POST CLEARWELL	101	No	Sampling Station	-	-	Active
RT 30 INTERCONNECT	102	No	Sampling Station	-	-	Active
DMWA WTP	301	No	Treatment Plant	-	-	Active
TREATMENT PLANT 302	302	No	Treatment Plant	-	-	Active

1 - 9 of 9

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
DMWA WTP	301	Permanganate	Manganese removal
DMWA WTP	301	Rapid Mix	Particulate removal
DMWA WTP	301	Coagulation	Particulate removal
DMWA WTP	301	Flocculation	Particulate removal
DMWA WTP	301	Sedimentation	Particulate removal
DMWA WTP	301	Gaseous Chlorination, Pre	Disinfection
DMWA WTP	301	Filtration, Rapid Sand	Particulate removal
DMWA WTP	301	pH Adjustment, Post	Corrosion control
DMWA WTP	301	Fluoridation	Other
DMWA WTP	301	Gaseous Chlorination, Post	Disinfection
DMWA WTP	301	Inhibitor, Orthophosphate	Corrosion control
DMWA WTP	301	Sludge Treatment	Particulate removal
DMWA WTP	301	Innovative	Other
TREATMENT PLANT 302	302	Fluoridation	Other
TREATMENT PLANT 302	302	Inhibitor, Orthophosphate	Corrosion control
TREATMENT PLANT 302	302	Gaseous Chlorination, Post	Disinfection

1 - 16 of 16

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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