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Lehigh County, Pennsylvania — public water systems

At a glance

197 active public water systems are filed under Lehigh County, Pennsylvania in EPA's SDWIS records, together reporting 292,806 people served. The largest is Lca Allentown Division, which reports serving 118,000 people. 40 are community water systems serving people where they live; the other 157 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

197

Population served

292.8K

Community systems

40

Groundwater share

94.4%

How does Lehigh County compare with other Pennsylvania counties?

Lehigh County has the 11th-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 292,806 people served in total, the 12th-largest county figure in the state and 2.3% of the statewide total. The average system here reports serving 1,486 people, about 15% 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 Lehigh County's drinking water come from?

By primary water source, Lehigh County's active systems draw on groundwater (185, 94%), purchased surface water (9, 4.6%), surface water (2, 1%) and purchased groundwater (1, 0.5%). Overall, 94% rely mainly on groundwater (including purchased groundwater) and 5.6% 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, Lca Allentown Division, draws primarily on surface water.

What kinds of water systems operate in Lehigh County?

Lehigh County's active systems break down as 40 community systems (20%), 28 non-transient non-community systems (14%) and 129 transient non-community systems (65%). 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 (75%), local government (15%), public/private partnership (9.6%) and state government (0.5%).

The 50 largest water systems in Lehigh County

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Active public water systems in Lehigh County, Pennsylvania
#Water systemCountyPopulation servedTypeSource
1Lca Allentown DivisionLehigh118,000CommunitySurface water
2Lca Wlsa Central DivisionLehigh47,693CommunityPurchased surface water
3Swt Main SystemLehigh14,500CommunityPurchased surface water
4Emmaus Borough Public WaterLehigh14,000CommunityGroundwater
5Whitehall Twp AuthorityLehigh13,063CommunityGroundwater
6Salisbury Twp Water SystemLehigh8,522CommunityPurchased surface water
7Lv Hospital Cedar CrestLehigh8,425Non-transient non-communityPurchased surface water
8Upper Saucon Twp Water SupplyLehigh7,300CommunityPurchased surface water
9Catasauqua Mun Water WorksLehigh6,598CommunityGroundwater
10Slatington Borough Water SysLehigh4,450CommunitySurface water
11Macungie Borough AuthorityLehigh3,039CommunityGroundwater
12Lca North Whitehall DivisionLehigh2,910CommunityPurchased surface water
13Coopersburg Mun Water AuthLehigh2,570CommunityGroundwater
14Lehigh Carbon Community CollegLehigh2,500Non-transient non-communityGroundwater
15Lehigh Career & Technical InstLehigh2,400Non-transient non-communityGroundwater
16Alburtis Borough AuthorityLehigh2,117CommunityGroundwater
17Desales UniversityLehigh2,000CommunityGroundwater
18Lca Arcadia West DivisionLehigh1,392CommunityGroundwater
19Swt Allentown Cons SystemLehigh1,300CommunityPurchased surface water
20Lca Emmaus Consecutive DivLehigh1,046CommunityPurchased groundwater
21Lca Washington Township DivLehigh965CommunityPurchased surface water
22Nwlsd High SchoolLehigh821Non-transient non-communityGroundwater
23Kernsville Elementary SchoolLehigh750Non-transient non-communityGroundwater
24Nwlsd Middle SchoolLehigh681Non-transient non-communityGroundwater
25Aqua Pa Springhouse FarmsLehigh645CommunityGroundwater
26Kidspeace - Orchard Hills CampLehigh640Non-transient non-communityGroundwater
27Nestle Purina Petcare CoLehigh640Non-transient non-communityGroundwater
28Lil Wolf MHPLehigh600CommunityGroundwater
29Nwlsd Elementary SchoolLehigh582Non-transient non-communityGroundwater
30Glencrest Mobile Home ParkLehigh570CommunityGroundwater
31Hanover Township Lehigh CountyLehigh520CommunityPurchased surface water
32Lca Heidelberg Heights DivLehigh509CommunityGroundwater
33Lehigh Cc Club House SystemLehigh500Transient non-communityGroundwater
34Ken-Man Water CoLehigh475CommunityGroundwater
35Hometown Breakfast Bar & GrillLehigh450Transient non-communityGroundwater
36Peters Elementary SchoolLehigh426Non-transient non-communityGroundwater
37Yoccos SouthLehigh400Transient non-communityGroundwater
38Big WoodysLehigh400Transient non-communityGroundwater
39Shankweilers Drive in TheaterLehigh400Transient non-communityGroundwater
40Jordan United Church of ChristLehigh350Transient non-communityGroundwater
41Allentown Lehigh Valley KoaLehigh340Transient non-communityGroundwater
42Milford Bible CampLehigh300Transient non-communityGroundwater
43St Pauls Ucc of TrexlertownLehigh300Transient non-communityGroundwater
44Lca Madison North DivisionLehigh290CommunityGroundwater
45Aqua Pa Country Club GardensLehigh268CommunityGroundwater
46Lca Upper Milford Central DivLehigh256CommunityGroundwater
47Star PlazaLehigh250Non-transient non-communityGroundwater
48St Michaels Archangel SchoolLehigh250Non-transient non-communityGroundwater
49Trivet Family Restaurant ILehigh250Transient non-communityGroundwater
50Lehigh Valley ZooLehigh250Transient non-communityGroundwater

All other water systems in Lehigh County (147)

The remaining active systems filed under Lehigh County, largest first, with the population each reports serving.

Lehigh County water systems: frequently asked questions

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

EPA's SDWIS records file 197 active public water systems under Lehigh County, Pennsylvania: 40 community systems (20%), 28 non-transient non-community systems (14%) and 129 transient non-community systems (65%).

Who supplies drinking water in Lehigh County, PA?

The largest community water systems filed under Lehigh County are Lca Allentown Division (118,000 people served), Lca Wlsa Central Division (47,693 people served) and Swt Main System (14,500 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 Lehigh County's drinking water come from groundwater or surface water?

Of the 197 active public water systems in Lehigh County, 94% draw mainly on groundwater and 5.6% on surface water, counting purchased supplies. The largest system, Lca Allentown Division, uses surface water.

Where can I find a water quality report for Lehigh 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. 40 community systems are filed under Lehigh 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 Lehigh 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 Lehigh County, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/lehigh (data as of October 1, 2026).