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National Drinking Water Database


Dichloroacetic acid in Illinois


Dichloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in Illinois

1,169 water utilities reported detecting Dichloroacetic acid in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Dichloroacetic acid level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Smithboro
Smithboro, IL
2007 of 738.33 ppb
(14.6 to 65.5 ppb)
2Findlay
Findlay, IL
8001 of 134.1 ppb
(34.1 ppb)
3Hilldale Manor Water Company
Ingleside, IL
4141 of 134 ppb
(34 ppb)
4Lake Williamson Christian Center
Carlinville, IL
1,25024 of 2433.47 ppb
(10.5 to 73.9 ppb)
5Alto Pass Water District
Alto Pass, IL
1,03124 of 2432.19 ppb
(9.75 to 67.75 ppb)
6Pierron
Pierron, IL
1,80028 of 2830.93 ppb
(14.55 to 83.64 ppb)
7Ellis Grove
Ellis Grove, IL
72021 of 2130.34 ppb
(16.73 to 57.25 ppb)
8Central Macoupin County Rwd
Jerseyville, IL
1,40025 of 2829.41 ppb
(0 to 129.83 ppb)
9Chester
Chester, IL
8,70223 of 2329.13 ppb
(19.08 to 42.5 ppb)
10Flora
Flora, IL
5,67521 of 2128.6 ppb
(9.7 to 45 ppb)

Health Based Limits for Dichloroacetic acid

StandardDescriptionLevel
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.0 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 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.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 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.100 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.5000 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.5000 ppb

Violation Summary for Dichloroacetic acid in Illinois

There are no violations reported for this contaminant in Illinois