Know Your Environment. Protect Your Health.

Chloroform

University of Connecticut - Main Campus

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.

 

130

Samples

0

Samples exceeding legal limit (MCL)

119

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20188.89 ppb2624ND - 24.6 ppb
20196.94 ppb2624ND - 20.3 ppb
20208.64 ppb2423ND - 20.3 ppb
202112.0 ppb1816ND - 24.9 ppb
20229.08 ppb1816ND - 18.0 ppb
20238.25 ppb1816ND - 21.0 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
2018-03-15CA02987TTHM11.0 ppb
2018-03-15CA02988TTHM4.50 ppb
2018-03-15CA02989TTHM16.0 ppb
2018-03-15CA02990TTHM3.00 ppb
2018-06-12CA68568TTHM13.0 ppb
2018-06-12CA68569TTHM11.0 ppb
2018-06-12CA68570TTHM14.0 ppb
2018-06-12CA68571TTHM3.00 ppb
2018-09-19DBP 20050618214.0 ppb
2018-09-19DBP 20050618423.8 ppb
2018-09-19DBP 2005061864.40 ppb
2018-09-19DBP 2005061896.00 ppb
2018-09-25DBP 20050672013.0 ppb
2018-09-25DBP 20050672124.6 ppb
2018-09-25DBP 2005067224.90 ppb
2018-09-25DBP 20050672310.4 ppb
2018-09-26DBP 2005069663.80 ppb
2018-09-27DBP 20050707310.00 ppb
2018-12-04DBP 2005147242.20 ppb
2018-12-04DBP 20051472517.8 ppb
2018-12-04DBP 2005147263.40 ppb
2018-12-04DBP 2005147286.60 ppb
2018-12-12VOC1 200515892ND
2018-12-12VOC1 200515895ND
2018-12-17DBP 2005162818.20 ppb
2018-12-17DBP 2005162822.50 ppb
2019-03-18DBP 2005250245.20 ppb
2019-03-18DBP 2005250265.30 ppb
2019-03-18DBP 2005250294.60 ppb
2019-03-18DBP 20052503110.00 ppb
2019-03-18DBP 2005250336.10 ppb
2019-03-18DBP 2005250342.60 ppb
2019-06-24DBP 2005375417.70 ppb
2019-06-24DBP 2005375428.40 ppb
2019-06-24DBP 2005375434.10 ppb
2019-06-25DBP 2005378066.80 ppb
2019-06-25DBP 20053780711.7 ppb
2019-06-25DBP 20053780819.2 ppb
2019-09-16DBP 2005490017.60 ppb
2019-09-16DBP 2005490023.00 ppb
2019-09-16DBP 2005490406.10 ppb
2019-09-16DBP 20054904119.1 ppb
2019-09-16DBP 2005490436.20 ppb
2019-09-16DBP 2005490443.30 ppb
2019-11-21VOC1 200557816ND
2019-11-21VOC1 200557817ND
2019-12-09DBP 2005594125.20 ppb
2019-12-09DBP 2005594164.00 ppb
2019-12-09DBP 2005594193.70 ppb
2019-12-09DBP 20055942220.3 ppb
2019-12-09DBP 2005594258.20 ppb
2019-12-09DBP 2005594272.10 ppb
2020-03-10DBP 20056886110.9 ppb
2020-03-10DBP 2005688629.10 ppb
2020-03-10DBP 2005688634.40 ppb
2020-03-10DBP 20056886411.3 ppb
2020-03-10DBP 2005688658.80 ppb
2020-03-10DBP 2005688662.50 ppb
2020-04-28VOC1 2005738860.700 ppb
2020-04-28VOC1 200573885ND
2020-06-08DBP 20057834810.8 ppb
2020-06-08DBP 20057834913.6 ppb
2020-06-08DBP 2005783504.20 ppb
2020-06-08DBP 20057835120.3 ppb
2020-06-08DBP 20057835210.1 ppb
2020-06-08DBP 2005783533.50 ppb
2020-09-08DBP 20058931017.1 ppb
2020-09-08DBP 20058931116.7 ppb
2020-09-08DBP 2005893127.20 ppb
2020-09-08DBP 2005893135.70 ppb
2020-09-08DBP 20058931415.4 ppb
2020-09-08DBP 2005893153.30 ppb
2020-12-14DBP 2006011566.00 ppb
2020-12-14DBP 2006011578.60 ppb
2020-12-14DBP 20060138511.3 ppb
2020-12-15DBP 2006014755.80 ppb
2021-03-10DBP 2006093797.70 ppb
2021-03-10DBP 2006093806.60 ppb
2021-03-10DBP 2006093814.90 ppb
2021-03-10DBP 20060938211.2 ppb
2021-06-01DBP 20061904221.3 ppb
2021-06-01DBP 2006190449.60 ppb
2021-06-01DBP 2006190469.20 ppb
2021-06-01DBP 20061904823.4 ppb
2021-09-08300054204 30005420917.9 ppb
2021-09-08300054205 30005421111.8 ppb
2021-09-08300054206 3000542135.40 ppb
2021-09-08300054207 30005421524.9 ppb
2021-09-14300059939 300059941ND
2021-09-14300059942 300059944ND
2021-12-07D300114234 30011423916.3 ppb
2021-12-07D300114235 3001142415.80 ppb
2021-12-07D300114236 30011424315.9 ppb
2021-12-07D300114237 30011424524.7 ppb
2022-03-07CK8043212.0 ppb
2022-03-07CK804335.50 ppb
2022-03-07CK8043411.0 ppb
2022-03-07CK8043518.0 ppb
2022-06-02CL4681010.00 ppb
2022-06-02CL468115.90 ppb
2022-06-02CL4681213.0 ppb
2022-06-02CL4681314.0 ppb
2022-09-12CM2852411.0 ppb
2022-09-12CM285258.10 ppb
2022-09-12CM2852617.0 ppb
2022-09-12CM2852710.00 ppb
2022-12-06CM98053ND
2022-12-06CM98054ND
2022-12-12CN025227.30 ppb
2022-12-12CN025234.00 ppb
2022-12-12CN025247.20 ppb
2022-12-12CN025259.40 ppb
2023-03-08CN552818.20 ppb
2023-03-08CN552824.60 ppb
2023-03-08CN552836.30 ppb
2023-03-08CN552849.90 ppb
2023-05-11CO03465ND
2023-05-11CO03466ND
2023-06-05CO1917919.0 ppb
2023-06-05CO191806.00 ppb
2023-06-05CO191815.50 ppb
2023-06-05CO1918213.0 ppb
2023-09-11CO9421013.0 ppb
2023-09-11CO942117.30 ppb
2023-09-11CO942127.50 ppb
2023-09-11CO9421321.0 ppb
2023-12-05CP598656.50 ppb
2023-12-05CP598664.80 ppb
2023-12-05CP598675.90 ppb
2023-12-05CP5986810.00 ppb