Tapcensus

Hexachlorobenzene violations in South Dakota

3 active public water systems in South Dakota had a Hexachlorobenzene violation in the past three years. What Hexachlorobenzene is and why it matters.

Health effects: Chronic exposure to hexachlorobenzene is associated with liver damage, skin lesions, and neurological effects. EPA classifies it as a probable human carcinogen (Group B2). It can be transferred to infants through breast milk. Reproductive and developmental toxicity have been observed in animal studies.

Systems with a Hexachlorobenzene violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Standing Rock Rural Water System
County 		6,839 4 1
Lower Brule Rural Water Supply System
County 		1,637 7 0
Big Bend Water System
County 		80 2 0
About this data

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