Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloroform

City of Jasper

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.

MORE ABOUT THIS CONTAMINANT

 

117

Samples

0

Samples exceeding legal limit (MCL)

29

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.524 ppb176ND - 2.50 ppb
20150.610 ppb214ND - 8.90 ppb
20160.514 ppb217ND - 3.40 ppb
20170.565 ppb207ND - 2.80 ppb
20180.121 ppb192ND - 1.20 ppb
20190.237 ppb193ND - 2.10 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-04AC45505ND
2014-03-04AC45461ND
2014-03-04AC45464ND
2014-03-04AC454671.30 ppb
2014-03-04AC454632.50 ppb
2014-06-17AC571771.20 ppb
2014-06-17AC57159ND
2014-06-17AC57158ND
2014-06-17AC571811.10 ppb
2014-09-16AC671541.50 ppb
2014-09-16AC67146ND
2014-09-16AC67160ND
2014-09-16AC671441.30 ppb
2014-12-18AC75441ND
2014-12-18AC75442ND
2014-12-18AC75438ND
2014-12-18AC75433ND
2015-02-02AC78757ND
2015-02-02AC787551.60 ppb
2015-02-02AC78759ND
2015-02-02AC78683ND
2015-02-02AC78685ND
2015-02-02AC78681ND
2015-02-02AC78734ND
2015-06-10AC95384ND
2015-06-10AC95388ND
2015-06-10AC95387ND
2015-06-10AC95393ND
2015-07-16AC998921.20 ppb
2015-07-16AC99885ND
2015-07-16AC99877ND
2015-07-16AC998821.10 ppb
2015-09-15AD073578.90 ppb
2015-11-23AD14374ND
2015-11-23AD14399ND
2015-11-23AD14394ND
2015-11-23AD14393ND
2015-11-23AD14457ND
2016-02-16AD23651ND
2016-02-16AD23647ND
2016-02-16AD236491.10 ppb
2016-02-16AD23613ND
2016-02-16AD236121.000 ppb
2016-02-16AD23619ND
2016-02-16AD23611ND
2016-05-09AD358141.20 ppb
2016-05-09AD357941.20 ppb
2016-05-09AD35803ND
2016-05-09AD35816ND
2016-09-07AD48361ND
2016-09-07AD483661.70 ppb
2016-09-07AD48346ND
2016-09-07AD48354ND
2016-09-07AD484783.40 ppb
2016-10-11AD52970ND
2016-10-11AD529551.20 ppb
2016-10-11AD52954ND
2016-10-11AD52973ND
2016-10-11AD52989ND
2017-03-07AD73724ND
2017-03-07AD73726ND
2017-03-07AD73722ND
2017-03-07AD73728ND
2017-03-07AD73688ND
2017-03-07AD73685ND
2017-03-07AD73683ND
2017-03-07AD73684ND
2017-04-03AD782421.60 ppb
2017-04-03AD782431.50 ppb
2017-04-03AD78239ND
2017-04-03AD782411.40 ppb
2017-07-17AD894551.30 ppb
2017-07-17AD894531.50 ppb
2017-07-17AD89454ND
2017-07-17AD89451ND
2017-10-10AE000791.20 ppb
2017-10-10AE000802.80 ppb
2017-10-10AE00088ND
2017-10-10AE00083ND
2018-02-13AE13598ND
2018-02-13AE13533ND
2018-02-13AE13531ND
2018-02-13AE13532ND
2018-02-13AE13530ND
2018-05-21AE27016ND
2018-05-21AE26992ND
2018-05-21AE269941.20 ppb
2018-05-21AE26995ND
2018-05-21AE26993ND
2018-07-18AE337841.10 ppb
2018-07-18AE33783ND
2018-07-18AE33765ND
2018-07-18AE33781ND
2018-10-15AE43452ND
2018-10-15AE43422ND
2018-10-15AE43419ND
2018-10-15AE43417ND
2018-10-15AE43418ND
2019-01-09AE49361ND
2019-01-09AE49355ND
2019-01-09AE49363ND
2019-02-19AE54824ND
2019-02-19AE548201.000 ppb
2019-02-19AE54821ND
2019-02-19AE54823ND
2019-04-02AE60816ND
2019-04-02AE60815ND
2019-04-02AE60814ND
2019-04-02AE60818ND
2019-09-16AE83514ND
2019-09-16AE835151.40 ppb
2019-09-16AE835172.10 ppb
2019-09-16AE83510ND
2019-11-18AE89530ND
2019-11-18AE89529ND
2019-11-18AE89532ND
2019-11-18AE89525ND