Know Your Environment. Protect Your Health.

Chloroform

North Hunt Special Utility District

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.03 ppb103ND - 9.92 ppb
201920.9 ppb105ND - 101.0 ppb
20202.21 ppb104ND - 7.00 ppb
20213.71 ppb104ND - 17.7 ppb
20221.51 ppb103ND - 7.41 ppb
20233.33 ppb105ND - 11.4 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
2018-02-14Q1806240004ND
2018-02-14Q1806240003ND
2018-06-04Q1822050002ND
2018-06-04Q18220500069.92 ppb
2018-06-04Q1822050007ND
2018-06-04Q1822050010ND
2018-08-09Q1831973001ND
2018-08-09Q18319730024.18 ppb
2018-11-06Q1844318003ND
2018-11-06Q18443180046.20 ppb
2019-03-12Q1910237001ND
2019-03-12Q191023700271.3 ppb
2019-05-28Q1928750008ND
2019-05-28Q1928750009101.0 ppb
2019-05-28Q19287500108.71 ppb
2019-05-28Q1928750012ND
2019-09-03Q1961311003ND
2019-09-03Q196131100421.7 ppb
2019-12-12Q1979989003ND
2019-12-12Q19799890045.88 ppb
2020-02-12Q2005710003ND
2020-02-12Q20057100045.94 ppb
2020-05-07Q20180550013.27 ppb
2020-05-07Q2018055002ND
2020-09-23Q2037713003ND
2020-09-23Q20377130047.00 ppb
2020-11-23Q2046621001ND
2020-11-23Q2046621007ND
2020-11-23Q2046621014ND
2020-11-23Q20466210155.90 ppb
2021-02-08Q2103700003ND
2021-02-08Q21037000105.41 ppb
2021-02-08Q2103700005ND
2021-02-08Q2103700009ND
2021-05-06Q2111768001ND
2021-05-06Q21117680028.96 ppb
2021-08-04Q2120522003ND
2021-08-04Q212052200417.7 ppb
2021-10-19Q2129315003ND
2021-10-19Q21293150045.07 ppb
2022-02-10Q2204937002ND
2022-02-10Q22049370035.05 ppb
2022-04-25Q2212341002ND
2022-04-25Q2212341003ND
2022-08-24Q2225213003ND
2022-08-24Q22252130047.41 ppb
2022-11-29Q2235351005ND
2022-11-29Q22353510132.64 ppb
2022-11-29Q2235351012ND
2022-11-29Q2235351007ND
2023-03-13Q23096680097.84 ppb
2023-03-13Q2309668010ND
2023-03-13Q2309668011ND
2023-03-13Q2309668013ND
2023-05-30Q2319961003ND
2023-05-30Q23199610041.86 ppb
2023-08-21Q2335121003ND
2023-08-21Q23351210043.03 ppb
2023-11-28Q235058600111.4 ppb
2023-11-28Q23505860029.12 ppb