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Pennsylvania Water Quality
812
Utilities in database
11.3M
Residents served
30%
On private wells
3
Key contaminants tracked
Drinking Water in Pennsylvania
Pennsylvania has 812 community water systems serving approximately 11.3 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, lead, nitrates. 30% of Pennsylvania residents rely on private wells. DEP holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Pennsylvania
576–600 of 812Plumstead Twp Summer Hill Mead
PA1090157 · 1,284 served
Shinglehouse Boro Water Dept
PA6530013 · 1,250 served
Ellsworth Boro Water Dept
PA5630044 · 1,250 served
Rockwood Boro Muni Auth
PA4560020 · 1,250 served
Indian Lake Boro Waterworks
PA4560025 · 1,246 served
South Buffalo Twp Muni Auth
PA5030049 · 1,230 served
Aqua Pa Mifflin Township
PA4190016 · 1,220 served
Aqua Pa White Haven
PA2400108 · 1,200 served
Parkhouse Nursing & Rehab Ctr
PA1460008 · 1,200 served
Arendtsville Muni Water Sys
PA7010001 · 1,200 served
Fredericksburg Water Auth
PA7380035 · 1,200 served
Bainbridge Water Authority
PA7360003 · 1,200 served
Cowanshan Yatesboro Numine Sys
PA5030047 · 1,200 served
Lake of the Pines
PA2450015 · 1,200 served
Orbisonia Rockhill Jt Mun Auth
PA4310025 · 1,200 served
Tamiment Resort
PA2520070 · 1,200 served
Galeton Borough Authority
PA6530010 · 1,200 served
Springboro Area Water Auth
PA6200050 · 1,175 served
Bloomfield Boro Water Auth
PA7500012 · 1,170 served
Cochranton Boro Water Dept
PA6200008 · 1,136 served
Jay Twp Water Authority
PA6240005 · 1,131 served
Point Marion Boro
PA5260017 · 1,110 served
Borough of Avondale
PA1150005 · 1,108 served
Mill Creek Area Mun Auth
PA4310050 · 1,108 served
Pawc Manwalamink Ns 3
PA2450113 · 1,100 served
Key Contaminant Concerns in Pennsylvania
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing.
Nitrates
Nitrate (NO₃⁻) is a nitrogen-containing compound that forms naturally through the decomposition of organic matter. At elevated concentrations — almost always from human activity — nitrate interferes with the blood's ability to carry oxygen. The United States produces over 23 million tons of nitrogen fertilizer annually, making agricultural runoff the dominant source of nitrate contamination.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
Pennsylvania Water FAQs
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Data source: Utility data from EPA SDWIS. 812 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-18