Tapcensus

Chlorobenzene violations in Iowa

14 active public water systems in Iowa had a Chlorobenzene violation in the past three years. What Chlorobenzene is and why it matters.

Health effects: Chronic exposure to chlorobenzene is associated with liver and kidney effects in animal studies. EPA has not classified it as a human carcinogen based on available data. Short-term exposure at high levels can cause nervous system depression. Long-term exposure above the MCL is the primary concern for public water system violations.

Systems with a Chlorobenzene violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Gilbert Water Supply
Gilbert · Story County
1,211 2 0
Camp Dodge Water Supply
Johnston · Polk County
1,169 4 0
Starmont Community School District
Strawberry Point · Clayton County
742 4 0
Hazleton Water Supply
Hazleton · Buchanan County
713 4 1
Plymouth Water Supply
Plymouth · Cerro Gordo County
378 5 1
Steamboat Rock Water Dept
Steamboat Rock · Hardin County
264 5 0
Lake Woods HOA
Shueyville · Johnson County
114 3 0
Valley View Estates #1 and #2
Muscatine · Muscatine County
89 2 0
New Cooperative, INC (roelyn)
Moorland · Webster County
80 4 0
Timber Valley Estates (third Addition)
Blue Grass · Scott County
73 2 0
US Nameplate Company INC
Mount Vernon · Linn County
65 8 1
Montipark LLC
Monticello · Jones County
60 10 4
Glenn Oaks Addition
Toddville · Linn County
58 6 2
North End Mobile Home Park
Dubuque · Dubuque County
40 4 0
About this data

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