Aldicarb violations in Wisconsin
2 active public water systems in Wisconsin had a Aldicarb violation in the past three years. What Aldicarb is and why it matters.
Health effects: Aldicarb is highly acutely toxic through acetylcholinesterase inhibition, disrupting nerve signal transmission at synapses. Symptoms of acute poisoning include excessive salivation, muscle tremors, nausea, convulsions, and at high doses respiratory arrest. Even short-term exposure above the MCL poses significant risk; children and the elderly are most vulnerable.
Systems with a Aldicarb violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
West Bend Waterworks West Bend · Washington County |
32,149 | 5 | 0 | |
|
Middleton Waterworks Middleton · Dane County |
23,868 | 3 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Aldicarb, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Aldicarb 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 Wisconsin 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.