Know Your Environment. Protect Your Health.

Chloroform

Clearfield Municipal Authority

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.

 

96

Samples

0

Samples exceeding legal limit (MCL)

96

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201828.0 ppb161614.0 ppb - 47.0 ppb
201921.8 ppb282812.0 ppb - 40.5 ppb
202022.3 ppb161613.2 ppb - 30.5 ppb
202120.4 ppb8810.9 ppb - 36.4 ppb
202216.1 ppb16166.01 ppb - 27.7 ppb
202320.9 ppb12127.99 ppb - 41.6 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
2018-02-13(703) Old 4314.0 ppb
2018-02-13(700) Old 4339.0 ppb
2018-02-13(701) Old 4317.0 ppb
2018-02-13(702) Old 4015.0 ppb
2018-05-09(700) Old 4347.0 ppb
2018-05-09(703) Old 4321.0 ppb
2018-05-09(701) Old 4321.0 ppb
2018-05-09(702) Old 4022.0 ppb
2018-08-09(700) Old 4345.0 ppb
2018-08-09(703) Old 4319.0 ppb
2018-08-09(701) Old 4324.0 ppb
2018-08-09(702) Old 4024.0 ppb
2018-11-098K20052-0146.5 ppb
2018-11-098K20052-0430.6 ppb
2018-11-098K20052-0328.9 ppb
2018-11-098K20052-0233.4 ppb
2019-02-15(702) Old 4013.0 ppb
2019-02-15(703) Old 4315.0 ppb
2019-02-15(703) Old 4315.0 ppb
2019-02-15(700) Old 4318.0 ppb
2019-02-15(702) Old 4013.0 ppb
2019-02-15(701) Old 4313.0 ppb
2019-02-15(701) Old 4313.0 ppb
2019-02-15(700) Old 4318.0 ppb
2019-05-09(700) Old 4332.0 ppb
2019-05-09(703) Old 4321.0 ppb
2019-05-09(703) Old 4321.0 ppb
2019-05-09(701) Old 4322.0 ppb
2019-05-09(701) Old 4322.0 ppb
2019-05-09(700) Old 4332.0 ppb
2019-05-09(702) Old 4020.0 ppb
2019-05-09(702) Old 4020.0 ppb
2019-08-13(700) Old 4312.0 ppb
2019-08-13(703) Old 4326.0 ppb
2019-08-13(703) Old 4326.0 ppb
2019-08-13(702) Old 4023.0 ppb
2019-08-13(702) Old 4023.0 ppb
2019-08-13(700) Old 4312.0 ppb
2019-08-13(701) Old 4326.0 ppb
2019-08-13(701) Old 4326.0 ppb
2019-11-129K13181-0433.8 ppb
2019-11-129K13181-0340.5 ppb
2019-11-129K13181-0236.4 ppb
2019-11-129K13181-0118.9 ppb
2020-02-1317.3 ppb
2020-02-1321.4 ppb
2020-02-1318.4 ppb
2020-02-1316.5 ppb
2020-05-1114.6 ppb
2020-05-1128.0 ppb
2020-05-1125.2 ppb
2020-05-1121.7 ppb
2020-08-1313.2 ppb
2020-08-1324.9 ppb
2020-08-1326.1 ppb
2020-08-1322.0 ppb
2020-11-1230.1 ppb
2020-11-1224.0 ppb
2020-11-1230.5 ppb
2020-11-1222.4 ppb
2021-02-0919.4 ppb
2021-02-0912.6 ppb
2021-05-1436.4 ppb
2021-05-1410.9 ppb
2021-08-0916.8 ppb
2021-08-0927.6 ppb
2021-11-0928.3 ppb
2021-11-0911.4 ppb
2022-02-1010.5 ppb
2022-02-106.01 ppb
2022-02-108.02 ppb
2022-02-1011.3 ppb
2022-05-097.92 ppb
2022-05-0914.4 ppb
2022-05-0921.0 ppb
2022-05-0916.2 ppb
2022-08-0911.6 ppb
2022-08-0920.9 ppb
2022-08-0916.9 ppb
2022-08-0922.3 ppb
2022-11-1421.4 ppb
2022-11-1427.7 ppb
2022-11-1425.9 ppb
2022-11-1416.1 ppb
2023-02-137.99 ppb
2023-02-1313.0 ppb
2023-02-1311.4 ppb
2023-02-1329.9 ppb
2023-05-1510.8 ppb
2023-05-1520.0 ppb
2023-08-1416.9 ppb
2023-08-1429.8 ppb
2023-11-1441.6 ppb
2023-11-1426.7 ppb
2023-11-1427.6 ppb
2023-11-1414.7 ppb