Simazine violations in Iowa
15 active public water systems in Iowa had a Simazine violation in the past three years. What Simazine is and why it matters.
Systems with a Simazine violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
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 | |
|
Equistar Chemicals LP Clinton · Clinton County |
715 | 2 | 0 | |
|
Hazleton Water Supply Hazleton · Buchanan County |
713 | 4 | 1 | |
|
Sabula Water Supply Sabula · Jackson County |
506 | 1 | 0 | |
|
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 | |
|
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 Simazine, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Simazine 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. Retrieved from ECHO on Oct 11, 2026.