Know Your Environment. Protect Your Health.

Chloroform

Lake Shreve Estates Water System

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

 

68

Samples

0

Samples exceeding legal limit (MCL)

41

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.513 ppb168ND - 1.30 ppb
20191.13 ppb2016ND - 2.10 ppb
20200.221 ppb85ND - 0.380 ppb
20212.03 ppb880.850 ppb - 2.70 ppb
20221.04 ppb84ND - 2.30 ppb
20230.841 ppb85ND - 2.10 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-1635375107002ND
2018-02-1635375107001ND
2018-02-1635375107002ND
2018-02-1635375107001ND
2018-05-1035392005001ND
2018-05-1035392005002ND
2018-05-1035392005002ND
2018-05-1035392005001ND
2018-08-03354086750011.10 ppb
2018-08-03354086750020.800 ppb
2018-08-03354086750020.800 ppb
2018-08-03354086750011.10 ppb
2018-11-15354321950010.900 ppb
2018-11-15354321950021.30 ppb
2018-11-15354321950010.900 ppb
2018-11-15354321950021.30 ppb
2019-02-26354507850021.60 ppb
2019-02-26354507850011.50 ppb
2019-02-26354507850021.60 ppb
2019-02-26354507850011.50 ppb
2019-05-10354683130011.90 ppb
2019-05-10354683130022.10 ppb
2019-05-10354683130022.10 ppb
2019-05-10354683130011.90 ppb
2019-08-01354871870021.50 ppb
2019-08-01354871870021.50 ppb
2019-08-01354871870011.60 ppb
2019-08-01354871870011.60 ppb
2019-08-1535491152002ND
2019-08-15354911520010.690 ppb
2019-08-15354911520010.690 ppb
2019-08-1535491152002ND
2019-11-21355146070020.450 ppb
2019-11-2135514607001ND
2019-11-2135514607001ND
2019-11-21355146070020.450 ppb
2020-02-14355311830010.370 ppb
2020-02-14355311830020.340 ppb
2020-05-22355520610010.350 ppb
2020-05-22355520610020.330 ppb
2020-08-1435570960001ND
2020-08-1435570960002ND
2020-11-30355954060010.380 ppb
2020-11-3035595406002ND
2021-02-22356153510012.70 ppb
2021-02-22356153510022.70 ppb
2021-05-07356332140011.90 ppb
2021-05-07356332140021.80 ppb
2021-08-27356592860020.850 ppb
2021-08-27356592860011.70 ppb
2021-11-10356768040022.30 ppb
2021-11-10356768040012.30 ppb
2022-02-17356993430011.90 ppb
2022-02-17356993430022.30 ppb
2022-05-2335721022001ND
2022-05-2335721022002ND
2022-08-1935741491002ND
2022-08-1935741491001ND
2022-11-07357597960022.00 ppb
2022-11-07357597960012.10 ppb
2023-02-15357806750011.20 ppb
2023-02-15357806750021.30 ppb
2023-05-25358026180011.20 ppb
2023-05-25358026180020.930 ppb
2023-08-2935824654001ND
2023-08-2935824654002ND
2023-11-0935840812001ND
2023-11-09358408120022.10 ppb