Public water system · PA4340002
ActiveMcalisterville Area Joint Auth
At a glance
Mcalisterville Area Joint Auth (PWSID PA4340002) is an active community water system in Juniata County, Pennsylvania. It reports serving 850 people through 425 service connections. Its primary water source is groundwater under influence of 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 April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
850
Service connections
425
Primary source
GU
Groundwater under influence of surface water
System type
CWS
Community water system
System record
How does Mcalisterville Area Joint Auth compare with other water systems in Juniata County?
By EPA's size categories, Mcalisterville Area Joint Auth is a small system (501 to 3,300 people). Juniata County has 38 active public water systems, and Mcalisterville Area Joint Auth is the 5th-largest of them by population served. Its population served is about 131% above the county average of 368 people per system, and accounts for 6.1% of the 13,989 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 Mcalisterville Area Joint 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. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 40 Pennsylvania systems (0.6%) list groundwater under influence of surface water as their primary source.
Who owns and regulates Mcalisterville Area Joint Auth?
EPA lists Mcalisterville Area Joint 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. 6 of the 38 active systems in Juniata County (16%) are also owned by a local government.
Does Mcalisterville Area Joint 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 April 2025. The violations listed here began between October 2021 and April 2025. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Groundwater Rule (4 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 |
|---|---|---|---|---|
| 2025-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2025-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2025-03-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2024-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2024-03-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2023-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2022-02-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2021-11-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2021-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | 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.
Mcalisterville Area Joint Auth: frequently asked questions
Who runs Mcalisterville Area Joint Auth?
Mcalisterville Area Joint Auth (PWSID PA4340002) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Mcalisterville Area Joint Auth serve?
Mcalisterville Area Joint Auth reports serving 850 people through 425 service connections in Juniata County, Pennsylvania.
Where does Mcalisterville Area Joint Auth get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does Mcalisterville Area Joint 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 April 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 Mcalisterville Area Joint 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 April 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 Mcalisterville Area Joint Auth's water quality report?
As a community water system, Mcalisterville Area Joint 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 Juniata County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mifflintown Muni Auth | Juniata | 4,450 | Community | Surface water |
| Richfield Area Joint Auth | Juniata | 1,000 | Community | Groundwater |
| Thompsontown Muni Auth | Juniata | 1,000 | Community | Groundwater |
| Port Royal Muni Auth | Juniata | 950 | Community | Groundwater |
| W E Schlegel Inc. | Juniata | 750 | Transient non-community | Groundwater |
| East Juniata High Sch | Juniata | 680 | Non-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, “Mcalisterville Area Joint Auth, PWSID PA4340002, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/mcalisterville-area-joint-auth-pa4340002 (data as of October 1, 2026).