Union County, Pennsylvania — public water systems
At a glance
37 active public water systems are filed under Union County, Pennsylvania in EPA's SDWIS records, together reporting 8,788 people served. The largest is Mifflinburg Boro Water Dept, which reports serving 3,690 people. 6 are community water systems serving people where they live; the other 31 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
37
Population served
8.8K
Community systems
6
Groundwater share
91.9%
How does Union County compare with other Pennsylvania counties?
Union County has the 54th-most active public water systems among the 99 counties listed for active Pennsylvania systems in EPA records; among the 71 with 3 or more systems, the median has 76. Its systems report 8,788 people served in total, the 63rd-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 238 people, well below the Pennsylvania average of 1,741. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Union County's drinking water come from?
By primary water source, Union County's active systems draw on groundwater (34, 92%), purchased surface water (2, 5.4%) and surface water (1, 2.7%). Overall, 92% rely mainly on groundwater (including purchased groundwater) and 8.1% on surface water, compared with 93% and 6.8% across Pennsylvania. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Mifflinburg Boro Water Dept, draws primarily on surface water.
What kinds of water systems operate in Union County?
Union County's active systems break down as 6 community systems (16%), 4 non-transient non-community systems (11%) and 27 transient non-community systems (73%). 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. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (70%), public/private partnership (16%), local government (11%) and state government (2.7%).
Water systems in Union County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Mifflinburg Boro Water Dept | Union | 3,690 | Community | Surface water |
| 2 | New Berlin Municipal Authority | Union | 990 | Community | Groundwater |
| 3 | Hidden Valley Camping Resort | Union | 600 | Transient non-community | Groundwater |
| 4 | Pine Valley Mobile Home Court | Union | 425 | Community | Groundwater |
| 5 | R B Winter State Park | Union | 400 | Transient non-community | Groundwater |
| 6 | Nittany Mountain Koa | Union | 350 | Transient non-community | Groundwater |
| 7 | West Buffalo Twp Mun Auth | Union | 333 | Community | Purchased surface water |
| 8 | Chilly Willys | Union | 250 | Transient non-community | Groundwater |
| 9 | White Deer Run Treatment Centr | Union | 226 | Non-transient non-community | Groundwater |
| 10 | Limestone Twp Mun Auth | Union | 200 | Community | Purchased surface water |
| 11 | Camp Mount Luther | Union | 120 | Transient non-community | Groundwater |
| 12 | Creekside Mennonite School | Union | 100 | Non-transient non-community | Groundwater |
| 13 | River Edge Campground | Union | 100 | Transient non-community | Groundwater |
| 14 | Shady Grove Christian School | Union | 90 | Non-transient non-community | Groundwater |
| 15 | Wesley Forest Camp | Union | 75 | Transient non-community | Groundwater |
| 16 | Penns Creek Campground | Union | 75 | Transient non-community | Groundwater |
| 17 | Pik Rite | Union | 70 | Non-transient non-community | Groundwater |
| 18 | Rolling Hills Manor | Union | 64 | Community | Groundwater |
| 19 | Central Pa Wesleyan Campground | Union | 50 | Transient non-community | Groundwater |
| 20 | Forest House Hotel | Union | 50 | Transient non-community | Groundwater |
| 21 | Ards Market | Union | 50 | Transient non-community | Groundwater |
| 22 | Boomerangs Bar & Grille Inc. | Union | 50 | Transient non-community | Groundwater |
| 23 | Hidden Creek Campground | Union | 50 | Transient non-community | Groundwater |
| 24 | Dc Coffee and Tea Co | Union | 50 | Transient non-community | Groundwater |
| 25 | Union Co Sportsmens Club | Union | 30 | Transient non-community | Groundwater |
| 26 | Forest Hill General Store | Union | 25 | Transient non-community | Groundwater |
| 27 | The Purple Cow | Union | 25 | Transient non-community | Groundwater |
| 28 | Get and Go LLC | Union | 25 | Transient non-community | Groundwater |
| 29 | Harveys Food Mart | Union | 25 | Transient non-community | Groundwater |
| 30 | Old Saw Mill Campground | Union | 25 | Transient non-community | Groundwater |
| 31 | Camp Karoondinha B S A | Union | 25 | Transient non-community | Groundwater |
| 32 | Sunsational Family Camp | Union | 25 | Transient non-community | Groundwater |
| 33 | La Primavera | Union | 25 | Transient non-community | Groundwater |
| 34 | Buffalo Valley Sportsmens Assn | Union | 25 | Transient non-community | Groundwater |
| 35 | Harveys | Union | 25 | Transient non-community | Groundwater |
| 36 | Yoder Zimmerman Vfw Post 1964 | Union | 25 | Transient non-community | Groundwater |
| 37 | West End Social Club | Union | 25 | Transient non-community | Groundwater |
Union County water systems: frequently asked questions
How many public water systems are in Union County, Pennsylvania?
EPA's SDWIS records file 37 active public water systems under Union County, Pennsylvania: 6 community systems (16%), 4 non-transient non-community systems (11%) and 27 transient non-community systems (73%).
Who supplies drinking water in Union County, PA?
The largest community water systems filed under Union County are Mifflinburg Boro Water Dept (3,690 people served), New Berlin Municipal Authority (990 people served) and Pine Valley Mobile Home Court (425 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Union County's drinking water come from groundwater or surface water?
Of the 37 active public water systems in Union County, 92% draw mainly on groundwater and 8.1% on surface water, counting purchased supplies. The largest system, Mifflinburg Boro Water Dept, uses surface water.
Where can I find a water quality report for Union County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 6 community systems are filed under Union County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Union County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Pennsylvania water systems
- All Pennsylvania public water systems· 7,217 active
- Armstrong County· 42 systems
- Fayette County· 40 systems
- Juniata County· 38 systems
- Jefferson County· 38 systems
- Clearfield County· 36 systems
- Clinton County· 31 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
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, “Public water systems in Union County, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/union (data as of October 1, 2026).