Tapcensus

Dalapon violations in Pennsylvania

203 active public water systems in Pennsylvania had a Dalapon violation in the past three years, 7 of them in the latest quarter of EPA's data. What Dalapon is and why it matters.

Health effects: Long-term exposure to dalapon is associated with liver and kidney effects in animal studies. EPA has not classified it as a human carcinogen based on available data. The general population is the primary concern for chronic low-level exposure through drinking water.

Systems with a Dalapon violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Sterling Business Park
Wayne County 		25 1 0
Westfall Water Company
Pike County 		25 2 0
White Haven Mountain Springs
Luzerne County 		25 6 2
About this data

A system is counted once if any of its violations in the past three years involved Dalapon, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Dalapon alone.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Pennsylvania records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.