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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Fruitridge Vista Water Company

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

 

97

Samples

0

Samples exceeding legal limit (MCL)

29

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.178 ppb91ND - 1.60 ppb
20150.700 ppb125ND - 1.90 ppb
20161.10 ppb146ND - 3.80 ppb
20170.919 ppb218ND - 3.70 ppb
20180.526 ppb195ND - 2.60 ppb
20190.295 ppb224ND - 1.80 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
2014-01-085810-004-13481.60 ppb
2014-01-085810-005-1256ND
2014-01-085810-017-1029ND
2014-01-085810-016-1110ND
2014-01-085810-014-1413ND
2014-04-105810-018-1139ND
2014-05-085810-020-1119ND
2014-05-085810-019-1047ND
2014-07-105810-005-1241ND
2015-01-085810-008-0712ND
2015-01-085810-010-0918ND
2015-01-085810-014-1243ND
2015-01-085810-006-13091.50 ppb
2015-01-085810-005-1130ND
2015-01-085810-004-12181.40 ppb
2015-04-085810-005-1227ND
2015-04-085810-006-13431.80 ppb
2015-07-095810-005-1052ND
2015-07-095810-006-12011.80 ppb
2015-10-155810-005-1118ND
2015-10-155810-006-12451.90 ppb
2016-01-065810-009-1030ND
2016-01-065810-003-12061.10 ppb
2016-01-065810-006-13152.90 ppb
2016-01-065810-014-1244ND
2016-01-065810-004-12191.70 ppb
2016-01-065810-013-0830ND
2016-01-065810-007-1110ND
2016-01-065810-005-1152ND
2016-04-075810-006-13472.30 ppb
2016-04-075810-005-1219ND
2016-07-075810-006-12333.80 ppb
2016-07-075810-005-1059ND
2016-10-135810-006-11163.60 ppb
2016-10-135810-005-1014ND
2017-01-195810-020-0838ND
2017-01-195810-014-1520ND
2017-01-195810-005-1345ND
2017-01-195810-016-1055ND
2017-01-195810-017-0940ND
2017-01-195810-018-1300ND
2017-01-235810-004-10291.80 ppb
2017-01-235810-006-10123.30 ppb
2017-01-235810-019-1105ND
2017-04-135810-005-1226ND
2017-04-135810-006-14262.80 ppb
2017-04-135810-014-1348ND
2017-04-195810-004-14481.50 ppb
2017-07-135810-004-11361.50 ppb
2017-07-135810-006-12533.70 ppb
2017-07-135810-014-1215ND
2017-07-135810-005-1120ND
2017-10-125810-006-13123.10 ppb
2017-10-125810-014-1239ND
2017-10-125810-005-1200ND
2017-10-125810-004-12231.60 ppb
2018-01-115810-014-1310ND
2018-01-115810-010-0910ND
2018-01-115810-008-0727ND
2018-01-115810-006-13552.60 ppb
2018-01-115810-004-12411.60 ppb
2018-01-115810-005-1200ND
2018-04-125810-007-1029ND
2018-04-125810-004-11581.80 ppb
2018-04-125810-014-1210ND
2018-04-125810-006-12442.60 ppb
2018-04-125810-005-1125ND
2018-07-185810-005-1215ND
2018-07-185810-014-1248ND
2018-07-185810-006-1328ND
2018-07-185810-004-1240ND
2018-10-045810-006-13111.40 ppb
2018-10-045810-005-1152ND
2018-10-045810-004-1217ND
2018-10-045810-014-1240ND
2019-01-105810-008-0725ND
2019-01-105810-004-11501.50 ppb
2019-01-105810-005-1123ND
2019-01-105810-014-1207ND
2019-01-105810-010-0920ND
2019-01-105810-006-12381.80 ppb
2019-02-155810-003-0941ND
2019-02-155810-007-0934ND
2019-02-155810-009-0914ND
2019-04-115810-014-1116ND
2019-04-115810-004-1056ND
2019-04-115810-006-1142ND
2019-04-115810-005-1028ND
2019-06-255810-013-1400ND
2019-07-115810-004-1118ND
2019-07-115810-005-1058ND
2019-07-115810-006-1203ND
2019-07-115810-014-1130ND
2019-10-175810-004-11501.60 ppb
2019-10-175810-005-1127ND
2019-10-175810-006-12291.60 ppb
2019-10-175810-014-1206ND