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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
451–475 of 812St Correct Inst Huntingdon
PA4310028 · 2,200 served
Borough of Conway
PA5040022 · 2,176 served
Shoemakersville Boro Water Sys
PA3060100 · 2,150 served
Fairfield Muni Auth
PA7010005 · 2,150 served
Bally Muni Water Works
PA3060002 · 2,146 served
Alburtis Borough Authority
PA3390045 · 2,117 served
Neshaminy Manor Center
PA1090093 · 2,100 served
Pocono/jackson Water Authority
PA2450122 · 2,100 served
Corner Water Supply & Service
PA6160027 · 2,100 served
Bcwsa Solebury
PA1090129 · 2,100 served
Hastings Muni Auth
PA4110013 · 2,100 served
Saint Francis University
PA4110800 · 2,072 served
Newville Boro Water Auth
PA7210041 · 2,070 served
Topton Boro Water Supply
PA3060072 · 2,069 served
Muncy State Correctional Inst
PA4410176 · 2,050 served
Canton Borough Authority
PA2080003 · 2,050 served
Parks Twp Muni Auth
PA5030025 · 2,049 served
Everett Boro Muni Auth
PA4050012 · 2,048 served
Mcconnellsburg Boro Muni Auth
PA4290005 · 2,000 served
Vanport Twp Muni Auth
PA5040055 · 2,000 served
Glen Rock Water Auth
PA7670050 · 2,000 served
Duncannon Muni Water
PA7500019 · 2,000 served
Desales University
PA3390093 · 2,000 served
West Kittanning Muni Auth
PA5030045 · 2,000 served
Coatesville Veterans Adm Hosp
PA1150186 · 2,000 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