Total Haloacetic Acids (HAA5) violations in Iowa
71 active public water systems in Iowa had a Total Haloacetic Acids (HAA5) violation in the past three years, 1 of them in the latest quarter of EPA's data. What Total Haloacetic Acids (HAA5) is and why it matters.
Systems with a Total Haloacetic Acids (HAA5) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Woden Water Supply Woden · Hancock County |
188 | 3 | 0 | |
|
Little Sioux Water Department Little Sioux · Harrison County |
150 | 3 | 1 | |
|
Chester Water Supply Chester · Howard County |
139 | 1 | 0 | |
|
Rowan Muni Water Supply Rowan · Wright County |
124 | 1 | 0 | |
|
Dawson Water Works Dawson · Dallas County |
116 | 6 | 0 | |
|
Pathway Christian School Kalona · Washington County |
115 | 3 | 1 | |
|
Center Junction (eiruss) Center Junction · Jones County |
100 | 4 | 3 | |
|
Twin Valley Lakes Improvement Assn Solon · Johnson County |
100 | 1 | 0 | |
|
Lost Canyon MHP (peosta) Peosta · Dubuque County |
97 | 1 | 0 | |
|
Wiota Water Works Wiota · Cass County |
95 | 3 | 0 | |
|
Midway Water and Lighting Cedar Rapids · Linn County |
72 | 1 | 0 | |
|
Beyonder Getaway at Sleepy Hollow Oxford · Johnson County |
70 | 4 | 2 | |
|
Ila Campus LLC Maharishi Vedic City · Jefferson County |
68 | 4 | 2 | |
|
Daybreak Foods INC Graettinger · Palo Alto County |
65 | 2 | 0 | |
|
US Nameplate Company INC Mount Vernon · Linn County |
65 | 8 | 1 | |
|
Valley View Water Association Missouri Valley · Harrison County |
65 | 3 | 0 | |
|
Maharishi Vedic City Water Supply Maharishi Vedic City · Jefferson County |
60 | 1 | 0 | |
|
Montipark LLC Monticello · Jones County |
60 | 10 | 4 | |
|
Timberlake Swisher · Johnson County |
52 | 5 | 1 | |
|
Timberlane Water Association Fort Dodge · Webster County |
48 | 3 | 0 | |
|
Green Brier Subdivision Dubuque · Dubuque County |
35 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Total Haloacetic Acids (HAA5), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Total Haloacetic Acids (HAA5) 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.