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
601–625 of 812Aqua Pa Perkiomen Woods
PA1460068 · 1,100 served
Chicora Boro Water Supply
PA5100029 · 1,100 served
Portland Boro Authority
PA3480059 · 1,100 served
Sandy Lake Boro
PA6430052 · 1,100 served
The Escape
PA2520036 · 1,100 served
Bessemer Borough Water Dept
PA6370003 · 1,100 served
Christiana Muni Water Auth
PA7360007 · 1,100 served
Aqua Pa Water Co Waymart
PA2640032 · 1,100 served
Pa Amer Water Co Indian Rocks
PA2640047 · 1,100 served
York Springs Muni Water
PA7010030 · 1,095 served
Royalton Boro
PA7220045 · 1,083 served
Zullinger Water System Wtma
PA7280044 · 1,080 served
Sheffield Twp Municipal Auth
PA6620031 · 1,075 served
Polk Center
PA6610010 · 1,058 served
Highland Est Mhp
PA3060043 · 1,050 served
Pawc Marcel Lakes
PA2520035 · 1,048 served
Mckean Twp Waterworks
PA6250096 · 1,048 served
Lca Emmaus Consecutive Div
PA3390075 · 1,046 served
Grantville Mhp
PA7220057 · 1,040 served
East Brady Water System
PA6160003 · 1,040 served
Southwest Warren Co Mun Auth
PA6620032 · 1,040 served
Bendersville Muni Auth
PA7010002 · 1,039 served
Mahoning Township
PA6370054 · 1,032 served
Hca Delano Park Place
PA2408007 · 1,017 served
Bernville Borough
PA3060085 · 1,010 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