Public water system · PA4560021
ActiveCairnbrook Improvement Assn
At a glance
Cairnbrook Improvement Assn (PWSID PA4560021) is an active community water system in Somerset County, Pennsylvania. It reports serving 910 people through 246 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
910
Service connections
246
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cairnbrook Improvement Assn compare with other water systems in Somerset County?
By EPA's size categories, Cairnbrook Improvement Assn is a small system (501 to 3,300 people). Somerset County has 102 active public water systems. Its population served is about 37% above the county average of 665 people per system, and accounts for 1.3% of the 67,819 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 Cairnbrook Improvement Assn 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 Cairnbrook Improvement Assn?
EPA lists Cairnbrook Improvement Assn as privately owned. 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. 41 of the 102 active systems in Somerset County (40%) are also privately owned.
Does Cairnbrook Improvement Assn have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2025. The violations listed here began between January 2020 and November 2025. By type: 11 monitoring and reporting and 1 monitoring. The contaminants or rules involved are Groundwater Rule, Revised Total Coliform Rule, Tetrachloroethylene and Heptachlor epoxide. 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 |
|---|---|---|---|---|
| 2025-11-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2023-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Heptachlor epoxidecode 2067 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endrincode 2005 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toxaphenecode 2020 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Methoxychlorcode 2015 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorocyclopentadienecode 2042 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlordanecode 2959 | 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.
Cairnbrook Improvement Assn: frequently asked questions
Who runs Cairnbrook Improvement Assn?
Cairnbrook Improvement Assn (PWSID PA4560021) is a community water system privately owned. It is regulated by the PA state drinking water program.
How many people does Cairnbrook Improvement Assn serve?
Cairnbrook Improvement Assn reports serving 910 people through 246 service connections in Somerset County, Pennsylvania.
Where does Cairnbrook Improvement Assn 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 Cairnbrook Improvement Assn 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 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 Cairnbrook Improvement Assn'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 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 Cairnbrook Improvement Assn's water quality report?
As a community water system, Cairnbrook Improvement Assn 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 Somerset County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Windber Area Auth | Somerset | 9,463 | Community | Groundwater |
| Conemaugh Twp Muni Auth | Somerset | 7,800 | Community | Surface water |
| Somerset Boro Muni Water Auth | Somerset | 6,309 | Community | Purchased surface water |
| Somerset Twp Muni Auth Oakridg | Somerset | 3,800 | Community | Purchased surface water |
| Seven Springs Muni Auth | Somerset | 3,000 | Community | Groundwater under influence of surface water |
| Boswell Boro Muni Auth | Somerset | 2,900 | Community | Purchased 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, “Cairnbrook Improvement Assn, PWSID PA4560021, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/cairnbrook-improvement-assn-pa4560021 (data as of October 1, 2026).