Public water system · PA4410173
ActiveWilliamsport Mun Water Auth
At a glance
Williamsport Mun Water Auth (PWSID PA4410173) is an active community water system in Lycoming County, Pennsylvania. It reports serving 51,000 people through 18,558 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 October 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
51,000
Service connections
18,558
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Williamsport Mun Water Auth compare with other water systems in Lycoming County?
By EPA's size categories, Williamsport Mun Water Auth is a large system (10,001 to 100,000 people). Lycoming County has 126 active public water systems, and Williamsport Mun Water Auth is the largest of them by population served. Its population served is about 73 times the county average of 702 people per system, and accounts for 58% of the 88,482 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 Williamsport Mun Water Auth is about 7.6 times 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 Williamsport Mun Water Auth?
EPA lists Williamsport Mun Water 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 126 active systems in Lycoming County (8.7%) are also owned by a local government.
Does Williamsport Mun Water 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 October 2018. The violations listed here began between October 2012 and October 2018. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (2 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 |
|---|---|---|---|---|
| 2018-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2018-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2018-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2018-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | 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.
Williamsport Mun Water Auth: frequently asked questions
Who runs Williamsport Mun Water Auth?
Williamsport Mun Water Auth (PWSID PA4410173) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Williamsport Mun Water Auth serve?
Williamsport Mun Water Auth reports serving 51,000 people through 18,558 service connections in Lycoming County, Pennsylvania.
Where does Williamsport Mun Water 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 Williamsport Mun Water 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 October 2018. 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 Williamsport Mun Water 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 October 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the PA state drinking water program.
Where can I find Williamsport Mun Water Auth's water quality report?
As a community water system, Williamsport Mun Water 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 Lycoming County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Jersey Shore Area Jnt Wat Auth | Lycoming | 6,600 | Community | Surface water |
| Montoursville Water Company | Lycoming | 4,983 | Community | Groundwater |
| Muncy Borough Water Company | Lycoming | 2,900 | Community | Groundwater |
| Hughesville Borough Water Auth | Lycoming | 2,800 | Community | Groundwater |
| Montgomery Water Authority | Lycoming | 2,700 | Community | Groundwater |
| Muncy State Correctional Inst | Lycoming | 2,050 | Community | Groundwater under influence of 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, “Williamsport Mun Water Auth, PWSID PA4410173, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/williamsport-mun-water-auth-pa4410173 (data as of October 1, 2026).