Tapcensus

Combined Uranium violations in Illinois

3 active public water systems in Illinois had a Combined Uranium violation in the past three years. What Combined Uranium is and why it matters.

Health effects: Uranium poses both radiological and chemical health risks. Chronic exposure is primarily associated with kidney damage due to its chemical toxicity as a heavy metal. The radiological risk — increased cancer probability — is also present but secondary to the nephrotoxic concern at drinking water concentrations. There is no safe threshold for radiation exposure.

Systems with a Combined Uranium violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Steeleville
Steeleville · Randolph County 		1,960 5 2
South Wilmington
South Wilmington · Grundy County 		710 4 2
Country Acres MHP (la Salle County)
LaSalle County 		222 1 0
About this data

A system is counted once if any of its violations in the past three years involved Combined Uranium, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Combined Uranium 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 Illinois 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. Retrieved from ECHO on Oct 11, 2026.