Public water system · PA5650080
ActiveLigonier Twp Muni Auth
At a glance
Ligonier Twp Muni Auth (PWSID PA5650080) is an active community water system in Westmoreland County, Pennsylvania. It reports serving 3,293 people through 1,757 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, none is health-based, and the most recent began in August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,293
Service connections
1,757
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Ligonier Twp Muni Auth compare with other water systems in Westmoreland County?
By EPA's size categories, Ligonier Twp Muni Auth is a small system (501 to 3,300 people). Westmoreland County has 74 active public water systems, and Ligonier Twp Muni Auth is the 6th-largest of them by population served. Its population served is roughly in line with the county average of 3,544 people per system, and accounts for 1.3% of the 262,253 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 Ligonier Twp Muni Auth is about half of 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 Ligonier Twp Muni Auth?
EPA lists Ligonier Twp Muni Auth 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. 11 of the 74 active systems in Westmoreland County (15%) are also owned by a local government.
Does Ligonier Twp Muni Auth have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2025. The violations listed here began between January 2025 and August 2025. By type: 10 public notice, recordkeeping or other and 2 monitoring and reporting. The contaminant or rule involved most often is Public Notice (10 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 |
|---|---|---|---|---|
| 2025-08-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2025-08-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | 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.
Ligonier Twp Muni Auth: frequently asked questions
Who runs Ligonier Twp Muni Auth?
Ligonier Twp Muni Auth (PWSID PA5650080) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Ligonier Twp Muni Auth serve?
Ligonier Twp Muni Auth reports serving 3,293 people through 1,757 service connections in Westmoreland County, Pennsylvania.
Where does Ligonier Twp Muni Auth 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 Ligonier Twp Muni Auth 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 August 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 Ligonier Twp Muni Auth'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 August 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 Ligonier Twp Muni Auth's water quality report?
As a community water system, Ligonier Twp Muni Auth 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 Westmoreland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mawc Sweeney Plant | Westmoreland | 143,000 | Community | Surface water |
| New Kensington Muni Auth | Westmoreland | 47,800 | Community | Surface water |
| Latrobe Muni Auth | Westmoreland | 30,000 | Community | Surface water |
| Highridge Water Auth | Westmoreland | 16,000 | Community | Surface water |
| Derry Boro Muni Auth | Westmoreland | 6,500 | Community | Surface water |
| Mawc Furnace Run | Westmoreland | 3,100 | 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, “Ligonier Twp Muni Auth, PWSID PA5650080, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/ligonier-twp-muni-auth-pa5650080 (data as of October 1, 2026).