Know Your Environment. Protect Your Health.

Chloroform

Hickory Grove 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.

 

66

Samples

0

Samples exceeding legal limit (MCL)

57

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201816.6 ppb16161.80 ppb - 63.1 ppb
20194.95 ppb1614ND - 22.8 ppb
20202.04 ppb105ND - 9.00 ppb
20217.66 ppb881.30 ppb - 21.9 ppb
20221.96 ppb86ND - 3.80 ppb
202328.7 ppb883.20 ppb - 89.7 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
2018-03-15353806620015.20 ppb
2018-03-15353806620024.70 ppb
2018-03-15353806620024.70 ppb
2018-03-15353806620015.20 ppb
2018-06-26354010690023.60 ppb
2018-06-26354010690011.80 ppb
2018-06-26354010690023.60 ppb
2018-06-26354010690011.80 ppb
2018-09-133541876900163.1 ppb
2018-09-133541876900247.0 ppb
2018-09-133541876900163.1 ppb
2018-09-133541876900247.0 ppb
2018-12-06354358520013.30 ppb
2018-12-06354358520013.30 ppb
2018-12-06354358520023.80 ppb
2018-12-06354358520023.80 ppb
2019-03-2835457911001ND
2019-03-28354579110021.10 ppb
2019-03-2835457911001ND
2019-03-28354579110021.10 ppb
2019-06-21354772410012.10 ppb
2019-06-21354772410021.10 ppb
2019-06-21354772410012.10 ppb
2019-06-21354772410021.10 ppb
2019-09-243550023800210.3 ppb
2019-09-243550023800122.8 ppb
2019-09-243550023800122.8 ppb
2019-09-243550023800210.3 ppb
2019-12-17355201080011.20 ppb
2019-12-17355201080020.960 ppb
2019-12-17355201080020.960 ppb
2019-12-17355201080011.20 ppb
2020-03-26355401310020.540 ppb
2020-03-2635540131001ND
2020-06-29355600280010.720 ppb
2020-06-29355600280021.10 ppb
2020-09-2835581617002ND
2020-10-0235582138001ND
2020-10-2035586849001ND
2020-10-2035586849002ND
2020-12-04355966520029.00 ppb
2020-12-04355966520019.00 ppb
2021-03-123561892500121.9 ppb
2021-03-123561892500221.8 ppb
2021-06-18356424050011.70 ppb
2021-06-18356424050021.30 ppb
2021-09-10356622500015.70 ppb
2021-09-10356622500026.00 ppb
2021-12-17356853910011.60 ppb
2021-12-17356853910021.30 ppb
2022-03-25357062700023.50 ppb
2022-03-25357062700013.20 ppb
2022-06-24357275330022.00 ppb
2022-06-24357275330013.80 ppb
2022-09-26357494520012.30 ppb
2022-09-26357494520020.910 ppb
2022-12-1235767467001ND
2022-12-1235767467002ND
2023-03-223578815600121.1 ppb
2023-03-223578815600215.8 ppb
2023-06-283580998600189.7 ppb
2023-06-283580998600285.7 ppb
2023-09-26358309260015.20 ppb
2023-09-26358309260025.50 ppb
2023-12-06358470580013.70 ppb
2023-12-06358470580023.20 ppb