Public water system · PA4600007
ActiveLimestone Twp Mun Auth
At a glance
Limestone Twp Mun Auth (PWSID PA4600007) is an active community water system in Union County, Pennsylvania. It reports serving 200 people through 33 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; none is health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
33
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Limestone Twp Mun Auth compare with other water systems in Union County?
By EPA's size categories, Limestone Twp Mun Auth is a very small system (500 people or fewer). Union County has 37 active public water systems. Its population served is about 16% below the county average of 238 people per system, and accounts for 2.3% of the 8,788 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 Limestone Twp Mun Auth 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 244 Pennsylvania systems (3.4%) list purchased surface water as their primary source.
Who owns and regulates Limestone Twp Mun Auth?
EPA lists Limestone Twp Mun 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. 4 of the 37 active systems in Union County (11%) are also owned by a local government.
Does Limestone Twp Mun Auth have drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in October 2025. The violations listed here began between July 2024 and October 2025. By type: 7 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Public Notice (2 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2025-10-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-10-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2024-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2024-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2024-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2024-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
All 9 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.
Limestone Twp Mun Auth: frequently asked questions
Who runs Limestone Twp Mun Auth?
Limestone Twp Mun Auth (PWSID PA4600007) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Limestone Twp Mun Auth serve?
Limestone Twp Mun Auth reports serving 200 people through 33 service connections in Union County, Pennsylvania.
Where does Limestone Twp Mun Auth get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Limestone Twp Mun Auth have any drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in October 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 Limestone Twp Mun 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. EPA's records list 9 violations for this system; none is health-based, and the most recent began in October 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 Limestone Twp Mun Auth's water quality report?
As a community water system, Limestone Twp Mun 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 Union County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mifflinburg Boro Water Dept | Union | 3,690 | Community | Surface water |
| New Berlin Municipal Authority | Union | 990 | Community | Groundwater |
| Hidden Valley Camping Resort | Union | 600 | Transient non-community | Groundwater |
| Pine Valley Mobile Home Court | Union | 425 | Community | Groundwater |
| R B Winter State Park | Union | 400 | Transient non-community | Groundwater |
| Nittany Mountain Koa | Union | 350 | Transient non-community | Groundwater |
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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, “Limestone Twp Mun Auth, PWSID PA4600007, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/limestone-twp-mun-auth-pa4600007 (data as of October 1, 2026).