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Blair County, Pennsylvania — public water systems

At a glance

50 active public water systems are filed under Blair County, Pennsylvania in EPA's SDWIS records, together reporting 101,604 people served. The largest is Altoona Water Authority, which reports serving 62,500 people. 24 are community water systems serving people where they live; the other 26 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

50

Population served

101.6K

Community systems

24

Groundwater share

86%

How does Blair County compare with other Pennsylvania counties?

Blair County has the 45th-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 101,604 people served in total, the 26th-largest county figure in the state and 0.8% of the statewide total. The average system here reports serving 2,032 people, about 17% above 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 Blair County's drinking water come from?

By primary water source, Blair County's active systems draw on groundwater (42, 84%), purchased surface water (5, 10%), surface water (2, 4%) and purchased groundwater (1, 2%). Overall, 86% rely mainly on groundwater (including purchased groundwater) and 14% 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, Altoona Water Authority, draws primarily on surface water.

What kinds of water systems operate in Blair County?

Blair County's active systems break down as 24 community systems (48%), 1 non-transient non-community systems (2%) and 25 transient non-community systems (50%). 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 (60%), local government (28%), public/private partnership (10%) and state government (2%).

Water systems in Blair County

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Active public water systems in Blair County, Pennsylvania
#Water systemCountyPopulation servedTypeSource
1Altoona Water AuthorityBlair62,500CommunitySurface water
2Hollidaysburg Muni AuthBlair8,523CommunityPurchased surface water
3Tyrone Boro Water AuthBlair6,500CommunitySurface water
4Roaring Spring Muni Water AuthBlair3,182CommunityGroundwater
5Bellwood Boro AuthBlair3,162CommunityPurchased surface water
6Martinsburg Muni AuthBlair3,160CommunityGroundwater
7Blair Twp Water & Sewer AuthBlair2,550CommunityPurchased surface water
8Greenfield Twp Muni AuthBlair2,500CommunityGroundwater
9Duncansville Muni Water AuthBlair2,350CommunityGroundwater
10Williamsburg Munic AuthBlair1,800CommunityGroundwater
11Freedom Twp Water & SewerBlair1,400CommunityPurchased surface water
12Juniata Gap Elem SchBlair620Non-transient non-communityGroundwater
13Hillcrest Communities LpBlair350CommunityGroundwater
14Southern Blair Senior CenterBlair350Transient non-communityGroundwater
15Geeseytown Vol Fire CoBlair304Transient non-communityGroundwater
16Fredericksburg Water AssnBlair300CommunityGroundwater
17Blair MHPBlair185CommunityGroundwater
18Sproul Water AssnBlair180CommunityGroundwater
19Henrietta Mutual Water AssnBlair165CommunityGroundwater
20Vfw Post No 8724Blair100Transient non-communityGroundwater
21Canoe Creek St ParkBlair100Transient non-communityGroundwater
22Fort RoberdeauBlair100Transient non-communityGroundwater
23Vail Water AssnBlair98CommunityGroundwater
24East Sharpsburg Water AssnBlair95CommunityGroundwater
25Westwood Park Water CoBlair95CommunityGroundwater
26Curryville Water AuthBlair85CommunityPurchased groundwater
27Ore Hill Water AssnBlair80CommunityGroundwater
28Camp Anderson Boy ScoutsBlair75Transient non-communityGroundwater
29Heidelberg CcBlair60Transient non-communityGroundwater
30Smith Corner Mennonite ChBlair60Transient non-communityGroundwater
31Mckee TavernBlair50Transient non-communityGroundwater
32Bel Air Park AptsBlair44CommunityGroundwater
33Leightys MktBlair40Transient non-communityGroundwater
34Ridge View Personal Care HomeBlair35CommunityGroundwater
35Apple Blossom Lane MHPBlair31CommunityGroundwater
36H2o To Go Save A LotBlair25Transient non-communityPurchased surface water
37Sheetz Store 169 MckeeBlair25Transient non-communityGroundwater
38Sinking Valley CcBlair25Transient non-communityGroundwater
39Relax InnBlair25Transient non-communityGroundwater
40Getgo #3701Blair25Transient non-communityGroundwater
41Conys KitchenBlair25Transient non-communityGroundwater
42Williamsburg C&Ma ChurchBlair25Transient non-communityGroundwater
43Sandys Cs LLCBlair25Transient non-communityGroundwater
44Milky Way Drive inBlair25Transient non-communityGroundwater
45Scotch Valley CcBlair25Transient non-communityGroundwater
46Gearharts MeatsBlair25Transient non-communityGroundwater
47Marzoni S GreenwoodBlair25Transient non-communityGroundwater
48Greenwood Steak HouseBlair25Transient non-communityGroundwater
49Wrights Orchard Sta CpgrdBlair25Transient non-communityGroundwater
50Best Way PizzaBlair25Transient non-communityGroundwater

Blair County water systems: frequently asked questions

How many public water systems are in Blair County, Pennsylvania?

EPA's SDWIS records file 50 active public water systems under Blair County, Pennsylvania: 24 community systems (48%), 1 non-transient non-community systems (2%) and 25 transient non-community systems (50%).

Who supplies drinking water in Blair County, PA?

The largest community water systems filed under Blair County are Altoona Water Authority (62,500 people served), Hollidaysburg Muni Auth (8,523 people served) and Tyrone Boro Water Auth (6,500 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 Blair County's drinking water come from groundwater or surface water?

Of the 50 active public water systems in Blair County, 86% draw mainly on groundwater and 14% on surface water, counting purchased supplies. The largest system, Altoona Water Authority, uses surface water.

Where can I find a water quality report for Blair 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. 24 community systems are filed under Blair 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 Blair 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

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 Blair County, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/blair (data as of October 1, 2026).