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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
726–750 of 812Highland S & W Auth Lloydell
PA4110015 · 723 served
Warren State Hospital
PA6620034 · 721 served
W Stclair Pleasantville Muni
PA4050020 · 715 served
Plumstead Twp Durham Ridge
PA1090138 · 714 served
Hereford Est Mhp
PA3060037 · 710 served
Pa American Turbotville
PA4490016 · 705 served
Franklintown Boro Muni Auth
PA7670113 · 705 served
Nwwa Pine Run
PA1090098 · 700 served
Austin Borough Water
PA6530005 · 700 served
Marion Twp Water Sys
PA5040087 · 700 served
Wyalusing Municipal Authority
PA2080034 · 700 served
Oak Ridge Authority
PA4140119 · 700 served
Gray Area Watr Auth of Jen Twp
PA4560036 · 700 served
Millerstown Boro Water
PA7500021 · 700 served
Summerville Boro Mun Auth
PA6330012 · 700 served
Eldred Twp Munic Auth
PA6330840 · 700 served
Bradford County Sewer & Water
PA2080033 · 700 served
Lawrenceville Boro Water Dept
PA2590050 · 691 served
Aqua Pa Tanglwood North
PA2520066 · 690 served
Freeburg Municipal Authority
PA4550013 · 685 served
Sbwja Hampton Hills Opequon
PA4140131 · 684 served
Jamestown Boro Water Auth
PA6430043 · 680 served
Aqua Pa East Pikeland
PA1150006 · 675 served
Penn Township Municipal Auth
PA4550028 · 672 served
Gregg Township Water Authority
PA4140107 · 670 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.
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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