Public water system · PA5030021
ActiveCowanshannock Ma-Margaret Sys
At a glance
Cowanshannock Ma-Margaret Sys (PWSID PA5030021) is an active community water system in Armstrong County, Pennsylvania. It reports serving 95 people through 33 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, one is health-based, and the most recent began in October 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
95
Service connections
33
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cowanshannock Ma-Margaret Sys compare with other water systems in Armstrong County?
By EPA's size categories, Cowanshannock Ma-Margaret Sys is a very small system (500 people or fewer). Armstrong County has 42 active public water systems. Its population served is well below the county average of 1,129 people per system, and accounts for 0.2% of the 47,431 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 Cowanshannock Ma-Margaret Sys 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 Cowanshannock Ma-Margaret Sys?
EPA lists Cowanshannock Ma-Margaret Sys 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. 20 of the 42 active systems in Armstrong County (48%) are also owned by a local government.
Does Cowanshannock Ma-Margaret Sys have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2020. The violations listed here began between January 2016 and October 2020. By type: 8 monitoring and reporting, 2 public notice, recordkeeping or other, 1 required treatment not met and 1 reporting. The contaminants or rules involved are Consumer Confidence Rule, 2,3,7,8-TCDD (dioxin), Polychlorinated biphenyls (PCBs), total and Public Notice. 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 |
|---|---|---|---|---|
| 2020-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,3,7,8-TCDD (dioxin)code 2063 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Resolved |
| 2018-09-13 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2018-09-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2017-01-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2016-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endrincode 2005 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dibromo-3-chloropropane (DBCP)code 2931 | 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.
Cowanshannock Ma-Margaret Sys: frequently asked questions
Who runs Cowanshannock Ma-Margaret Sys?
Cowanshannock Ma-Margaret Sys (PWSID PA5030021) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Cowanshannock Ma-Margaret Sys serve?
Cowanshannock Ma-Margaret Sys reports serving 95 people through 33 service connections in Armstrong County, Pennsylvania.
Where does Cowanshannock Ma-Margaret Sys 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 Cowanshannock Ma-Margaret Sys have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2020. 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 Cowanshannock Ma-Margaret Sys' 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, one is health-based, and the most recent began in October 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the PA state drinking water program.
Where can I find Cowanshannock Ma-Margaret Sys' water quality report?
As a community water system, Cowanshannock Ma-Margaret Sys 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 Armstrong County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kittanning Suburb Jt Water Aut | Armstrong | 8,000 | Community | Surface water |
| Manor Twp Jt Muni Auth | Armstrong | 6,744 | Community | Groundwater |
| Buffalo Twp Mun Auth Freeport | Armstrong | 5,849 | Community | Surface water |
| Pa American Water Kittanning | Armstrong | 4,499 | Community | Surface water |
| Ford City Muni Water Works | Armstrong | 2,991 | Community | Groundwater |
| Parks Twp Muni Auth | Armstrong | 2,049 | 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, “Cowanshannock Ma-Margaret Sys, PWSID PA5030021, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/cowanshannock-ma-margaret-sys-pa5030021 (data as of October 1, 2026).