Tapcensus

Heptachlor violations in Rhode Island

9 active public water systems in Rhode Island had a Heptachlor violation in the past three years. What Heptachlor is and why it matters.

Health effects: Chronic exposure to heptachlor is associated with liver damage and increased cancer risk. EPA classifies it as a probable human carcinogen (Group B2). Animal studies show liver tumors at elevated doses. The general population faces chronic risk from legacy soil contamination; children are most vulnerable to cumulative organochlorine exposure.

Systems with a Heptachlor violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Quonset Business Park
North Kingstown · Washington County 		13,000 6 0
Block Island Water Company
New Shoreham · Washington County 		9,999 1 0
Kingston Water District
South Kingstown · Washington County 		3,968 3 0
Prudence Island Water District
Portsmouth · Newport County 		1,500 4 0
Quonochontaug East Beach Water Associati
Charlestown · Washington County 		300 2 0
Bethel Village Water Assn
Hopkinton · Washington County 		180 11 1
Hillsdale Housing Cooperative, Inc.
South Kingstown · Washington County 		170 2 0
Nasonville Water District
Burrillville · Providence County 		150 2 0
Dean Warehouse Services
Hopkinton · Washington County 		25 1 0
About this data

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