The Power of Information

National Drinking Water Database

Atrazine in Ohio

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 Ohio

80 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
1Village of Blanchester
Blanchester, OH
4,50034 of 501.74 ppb
(0 to 8.3 ppb)
2City of Napoleon
Napoleon, OH
9,31829 of 501.46 ppb
(0 to 7.1 ppb)
3Village of Mcclure
Mcclure, OH
85023 of 441.14 ppb
(0 to 7.9 ppb)
4Defiance Water Treatment Plant
Defiance, OH
17,00028 of 510.93 ppb
(0 to 5.15 ppb)
5Oh/Am Water Company-Mari
Marion, OH
48,00023 of 380.9 ppb
(0 to 6.9 ppb)
6Ashley, Village
Ashley, OH
1,7003 of 50.76 ppb
(0 to 1.5 ppb)
7City of Delaware
Delaware, OH
28,00023 of 480.66 ppb
(0 to 4.4 ppb)
8City of Piqua
Piqua, OH
20,50015 of 350.54 ppb
(0 to 3.35 ppb)
9Lake of The Woods Water Company
Granville, OH
47524 of 360.53 ppb
(0 to 3.04 ppb)
10Findlay Water Treatment Plant
Findlay, OH
40,00014 of 200.53 ppb
(0 to 1.3 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 Ohio

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Ohio since 2004

Violation TypeNumber of Violations
Failure to monitor regularly85