The Power of Information

National Drinking Water Database

Atrazine in Iowa

Atrazine is an endocrine-disrupting herbicide used on corn, sugarcane and sorghum; it is associated with adverse reproductive effects and toxicity to the immune system. [read more]

The Most Polluted Communities in Iowa

37 water utilities reported detecting Atrazine in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Atrazine level

RankSystem Population Served Positive test results of total reported tests Average Level
1Creston Water Supply
Creston, IA
7,5978 of 90.86 ppb
(0 to 2.5 ppb)
2University Water System
Iowa City, IA
26,6841 of 10.7 ppb
(0.7 ppb)
3Peterson Municipal Water Supply
Peterson, IA
3721 of 10.6 ppb
(0.6 ppb)
4Osceola Water Works
Osceola, IA
4,6596 of 70.48 ppb
(0 to 1.25 ppb)
5Iowa-American Wtr Co-Davenport
Davenport, IA
133,2692 of 20.45 ppb
(0.2 to 0.7 ppb)
6Chariton Municipal Water Works
Chariton, IA
4,5736 of 60.44 ppb
(0.12 to 0.81 ppb)
7Rathbun Regional Water Assn (Rathbun)
Centervill, IA
27,64012 of 150.41 ppb
(0 to 0.75 ppb)
8Greenfield Municipal Utilities
Greenfield, IA
2,1291 of 10.4 ppb
(0.4 ppb)
9Lamoni Municipal Utilities
Lamoni, IA
2,5543 of 60.4 ppb
(0 to 1.21 ppb)
10Leon Water Supply
Leon, IA
2,0462 of 20.3 ppb
(0.2 to 0.4 ppb)

Health Based Limits for Atrazine

California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.15 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.3 ppb
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.3 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.700 ppb

Violation Summary for Atrazine in Iowa

There are no violations reported for this contaminant in Iowa