State Hub
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
776–800 of 812Springtown Water Authority
PA1090064 · 600 served
Dayton Muni Water Dept
PA5030002 · 600 served
Pawc Manwalamink Ns 1&2
PA2450099 · 600 served
Kittanning Plumcreek Watr Auth
PA5030013 · 600 served
Lcwsa Village Water
PA4410174 · 598 served
Knoxville Water Department
PA2590036 · 590 served
Jenner Twp Muni Auth
PA4560017 · 576 served
Mapleton Muni Water Auth
PA4310015 · 570 served
Glencrest Mobile Home Park
PA3390020 · 570 served
Aqua Pa Oneida
PA3540071 · 568 served
Meshoppen Borough Water Co
PA2660010 · 563 served
Oakland Borough Water Auth
PA2580025 · 563 served
Clintonville Boro Wtp
PA6610016 · 557 served
Aqua Pa Jefferson Heights
PA2350057 · 556 served
Aqua Pa Laurel Lakes
PA2400111 · 552 served
Haines Aaronsburg Mun Auth
PA4140108 · 550 served
Venango Water Co
PA6610014 · 550 served
Indian Run Village Mhp
PA1150051 · 550 served
Paradise Mhp
PA7500003 · 550 served
Quincy Twp Water System
PA7280074 · 530 served
Rouseville Mun Waterworks
PA6610028 · 523 served
Hanover Township Lehigh County
PA3390097 · 520 served
Newell Muni Auth
PA5260014 · 520 served
Lcwsa Halls Station
PA4410035 · 518 served
Lca Heidelberg Heights Div
PA3390047 · 509 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
Quick Links
Data source: Utility data from EPA SDWIS. 812 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-18