Public water system · PA1150106

Active

Pa American Coatesville

At a glance

Pa American Coatesville (PWSID PA1150106) is an active community water system in Chester County, Pennsylvania. It reports serving 36,960 people through 14,541 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in August 2023.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

36,960

Service connections

14,541

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDPA1150106

System typeCommunity water system

Activity statusActive

Population served36,960

Service connections14,541

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyPA state drinking water program

City served—

StatePennsylvania

ZIP—

CountyChester County

How does Pa American Coatesville compare with other water systems in Chester County?

By EPA's size categories, Pa American Coatesville is a large system (10,001 to 100,000 people). Chester County has 254 active public water systems, and Pa American Coatesville is the 3rd-largest of them by population served. Its population served is about 32 times the county average of 1,167 people per system, and accounts for 12% of the 296,348 people reported by systems filed under the county. Across Pennsylvania, the 7,217 active systems average 1,741 people each. Nationally, the average active community water system reports serving 6,703 people, so Pa American Coatesville is about 5.5 times that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Pennsylvania has 1,762 active community water systems, 24% of the state's 7,217 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 246 Pennsylvania systems (3.4%) list surface water as their primary source.

Who owns and regulates Pa American Coatesville?

EPA lists Pa American Coatesville as owned by a local government. The PA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 24 of the 254 active systems in Chester County (9.4%) are also owned by a local government.

Does Pa American Coatesville have drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in August 2023. The violations listed here began between October 2002 and August 2023. By type: 5 monitoring and reporting, 2 contaminant level above the legal limit, 2 public notice, recordkeeping or other, 2 required treatment not met and 1 reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.

Began	Violation	Contaminant or rule	Health-based	Status
2023-08-01	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2023-08-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2023-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorine dioxidecode 1008	No	Resolved
2023-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chloritecode 1009	No	Resolved
2012-08-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2012-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2010-08-10	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2010-05-11	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2010-04-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2010-01-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2003-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
2002-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved

The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Pa American Coatesville: frequently asked questions

Who runs Pa American Coatesville?

Pa American Coatesville (PWSID PA1150106) is a community water system owned by a local government. It is regulated by the PA state drinking water program.

How many people does Pa American Coatesville serve?

Pa American Coatesville reports serving 36,960 people through 14,541 service connections in Chester County, Pennsylvania.

Where does Pa American Coatesville get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does Pa American Coatesville have any drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in August 2023. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Pa American Coatesville's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in August 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the PA state drinking water program.

Where can I find Pa American Coatesville's water quality report?

As a community water system, Pa American Coatesville must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Chester County

Water system	County	Population served	Type	Source
Pa American Royersford	Chester	49,508	Community	Surface water
Aqua Pa West Chester	Chester	48,600	Community	Surface water
Aqua Pa Uwchlan	Chester	35,518	Community	Purchased surface water
Phoenixville Water Dept	Chester	16,599	Community	Surface water
Downingtown Water Authority	Chester	9,900	Community	Surface water
Aqua Pa Friendship	Chester	8,800	Community	Groundwater

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Pa American Coatesville, PWSID PA1150106, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/pa-american-coatesville-pa1150106 (data as of October 1, 2026).