The Power of Information

National Drinking Water Database


Methoxychlor in Illinois


Methoxychlor is an endocrine-disrupting insecticide similar to DDT; banned in the U.S. in 2002, it was historically used on farm animals and in animal feed, lumber, gardens and certain crops. [read more]

The Most Polluted Communities in Illinois

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

Ranked by highest average Methoxychlor level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Mathersville
Mathersville, IL
7791 of 20.42 ppb
(0 to 0.84 ppb)
2Coal Valley
Coal Valley, IL
3,6062 of 80.08 ppb
(0 to 0.39 ppb)
3Forest City
Forest City, IL
2871 of 30.07 ppb
(0 to 0.2 ppb)
4Kane
Kane, IL
5001 of 30.06 ppb
(0 to 0.19 ppb)
5New Haven
New Haven, IL
4931 of 30.06 ppb
(0 to 0.18 ppb)
6Dawson
Dawson, IL
2,3401 of 20.06 ppb
(0 to 0.11 ppb)
7Alexis
Alexis, IL
8631 of 20.06 ppb
(0 to 0.11 ppb)
8Baylis
Baylis, IL
2721 of 70.05 ppb
(0 to 0.36 ppb)
9Mendota
Mendota, IL
7,2721 of 20.04 ppb
(0 to 0.09 ppb)
10Delavan
Delavan, IL
1,8251 of 30.04 ppb
(0 to 0.11 ppb)

Health Based Limits for Methoxychlor

StandardDescriptionLevel
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.30 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.40 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.40 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.40 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.50 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.50 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.100 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.200 ppb

Violation Summary for Methoxychlor in Illinois

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

Violation TypeNumber of Violations
Failure to monitor regularly27