Public water system · PA5100033
ActiveEvans City Borough
At a glance
Evans City Borough (PWSID PA5100033) is an active community water system in Butler County, Pennsylvania. It reports serving 1,990 people through 874 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,990
Service connections
874
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Evans City Borough compare with other water systems in Butler County?
By EPA's size categories, Evans City Borough is a small system (501 to 3,300 people). Butler County has 155 active public water systems. Its population served is about twice the county average of 1,007 people per system, and accounts for 1.3% of the 156,059 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 Evans City Borough is well below 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 244 Pennsylvania systems (3.4%) list purchased surface water as their primary source.
Who owns and regulates Evans City Borough?
EPA lists Evans City Borough 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. 15 of the 155 active systems in Butler County (9.7%) are also owned by a local government.
Does Evans City Borough have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2025. The violations listed here began between April 2016 and October 2025. By type: 8 monitoring and reporting, 2 monitoring, 1 reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Revised Total Coliform Rule (4 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 |
|---|---|---|---|---|
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2022-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2018-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2018-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2017-05-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-04-01 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | 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.
Evans City Borough: frequently asked questions
Who runs Evans City Borough?
Evans City Borough (PWSID PA5100033) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Evans City Borough serve?
Evans City Borough reports serving 1,990 people through 874 service connections in Butler County, Pennsylvania.
Where does Evans City Borough get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Evans City Borough have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2025. 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 Evans City Borough'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, none is health-based, and the most recent began in October 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the PA state drinking water program.
Where can I find Evans City Borough's water quality report?
As a community water system, Evans City Borough 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 Butler County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pa American Water Co Butler | Butler | 43,286 | Community | Surface water |
| Cranberry Twp WTP | Butler | 42,000 | Community | Purchased surface water |
| Slippery Rock Muni Auth | Butler | 15,778 | Community | Groundwater |
| Municipal Water Auth Adams Twp | Butler | 8,700 | Community | Purchased surface water |
| Harmony Boro Water Auth | Butler | 6,669 | Community | Surface water |
| Zelienople Boro | Butler | 4,123 | Community | Purchased surface water |
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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, “Evans City Borough, PWSID PA5100033, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/evans-city-borough-pa5100033 (data as of October 1, 2026).