Public water system · PA6430036
ActiveFredonia Boro
At a glance
Fredonia Boro (PWSID PA6430036) is an active community water system in Mercer County, Pennsylvania. It reports serving 443 people through 254 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
443
Service connections
254
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Fredonia Boro compare with other water systems in Mercer County?
By EPA's size categories, Fredonia Boro is a very small system (500 people or fewer). Mercer County has 124 active public water systems. Its population served is about 42% below the county average of 769 people per system, and accounts for 0.5% of the 95,322 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 Fredonia Boro 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,632 Pennsylvania systems (92%) list groundwater as their primary source.
Who owns and regulates Fredonia Boro?
EPA lists Fredonia Boro 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. 14 of the 124 active systems in Mercer County (11%) are also owned by a local government.
Does Fredonia Boro have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2025. The violations listed here began between September 2023 and November 2025. By type: 8 monitoring and reporting, 2 required treatment not met and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Groundwater Rule (8 of them). EPA lists 10 as resolved and 2 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-11-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2025-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2025-07-25 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-07-25 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2025-03-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2024-10-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2024-08-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2024-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2023-09-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | 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.
Fredonia Boro: frequently asked questions
Who runs Fredonia Boro?
Fredonia Boro (PWSID PA6430036) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Fredonia Boro serve?
Fredonia Boro reports serving 443 people through 254 service connections in Mercer County, Pennsylvania.
Where does Fredonia Boro get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Fredonia Boro have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 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 Fredonia Boro'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, 2 are health-based, and the most recent began in November 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 Fredonia Boro's water quality report?
As a community water system, Fredonia Boro 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 Mercer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Aqua Pa Shenango Valley WTP | Mercer | 48,000 | Community | Surface water |
| Aqua Pa Greenville | Mercer | 8,600 | Community | Surface water |
| Grove City Boro Water Dept | Mercer | 7,871 | Community | Groundwater |
| Sharpsville Boro Water Co | Mercer | 5,029 | Community | Purchased surface water |
| Pine Twp Water Distr System | Mercer | 3,082 | Community | Purchased groundwater |
| Reynolds Water Company | Mercer | 2,370 | Community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Fredonia Boro, PWSID PA6430036, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/fredonia-boro-pa6430036 (data as of October 1, 2026).