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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

Lincoln Avenue 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.

 

94

Samples

0

Samples exceeding legal limit (MCL)

68

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.42 ppb129ND - 6.60 ppb
20132.13 ppb1611ND - 5.50 ppb
20142.23 ppb1612ND - 4.40 ppb
20152.93 ppb1610ND - 22.5 ppb
20164.17 ppb1613ND - 8.80 ppb
201719.2 ppb1813ND - 49.7 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
2012-04-033761-802-12201.10 ppb
2012-04-033761-800-1120ND
2012-04-033761-801-1100ND
2012-04-033761-803-1310ND
2012-07-033761-802-11402.90 ppb
2012-07-033761-801-09552.80 ppb
2012-07-033761-800-10152.10 ppb
2012-07-033761-803-09202.40 ppb
2012-10-023761-802-11156.60 ppb
2012-10-023761-801-09053.30 ppb
2012-10-023761-800-09302.90 ppb
2012-10-023761-803-11554.90 ppb
2013-01-023761-800-1022ND
2013-01-023761-803-1215ND
2013-01-023761-801-0958ND
2013-01-023761-802-11501.000 ppb
2013-04-023761-803-12551.30 ppb
2013-04-023761-800-1035ND
2013-04-023761-801-1005ND
2013-04-023761-802-12051.000 ppb
2013-07-023761-801-10105.50 ppb
2013-07-023761-802-10554.60 ppb
2013-07-023761-800-09553.20 ppb
2013-07-023761-803-12003.40 ppb
2013-10-013761-803-12354.20 ppb
2013-10-013761-801-09554.30 ppb
2013-10-013761-800-10052.70 ppb
2013-10-013761-802-11302.90 ppb
2014-01-073761-801-0935ND
2014-01-073761-803-1205ND
2014-01-073761-802-1135ND
2014-01-073761-800-1010ND
2014-05-223761-801-09052.40 ppb
2014-05-223761-802-09302.30 ppb
2014-05-223761-803-08152.00 ppb
2014-05-223761-800-08451.80 ppb
2014-07-013761-801-09504.40 ppb
2014-07-013761-800-10502.00 ppb
2014-07-013761-803-12402.70 ppb
2014-07-013761-802-12104.30 ppb
2014-10-073761-800-11103.10 ppb
2014-10-073761-801-10554.00 ppb
2014-10-073761-802-11183.30 ppb
2014-10-073761-803-12303.40 ppb
2015-01-063761-800-10151.40 ppb
2015-01-063761-801-0955ND
2015-01-063761-802-1155ND
2015-01-063761-803-1230ND
2015-04-073761-801-10451.50 ppb
2015-04-073761-800-11152.20 ppb
2015-04-073761-802-1240ND
2015-04-073761-803-1305ND
2015-07-073761-801-11352.10 ppb
2015-07-073761-802-09401.80 ppb
2015-07-073761-803-1230ND
2015-07-073761-800-11101.10 ppb
2015-10-073761-800-09557.60 ppb
2015-10-073761-802-11153.20 ppb
2015-10-073761-803-115022.5 ppb
2015-10-073761-801-09353.40 ppb
2016-01-053761-801-10254.10 ppb
2016-01-053761-800-11052.30 ppb
2016-01-053761-802-12355.10 ppb
2016-01-053761-803-1315ND
2016-04-053761-802-1040ND
2016-04-053761-800-10101.20 ppb
2016-04-053761-803-1100ND
2016-04-053761-801-09401.50 ppb
2016-07-053761-802-12155.80 ppb
2016-07-053761-800-11107.50 ppb
2016-07-053761-803-13007.00 ppb
2016-07-053761-801-10458.80 ppb
2016-10-043761-801-10006.30 ppb
2016-10-043761-802-11355.90 ppb
2016-10-043761-803-12005.80 ppb
2016-10-043761-800-10155.40 ppb
2017-01-033761-803-1200ND
2017-01-033761-802-1125ND
2017-01-033761-800-1005ND
2017-01-033761-801-0950ND
2017-02-243761-800-103039.2 ppb
2017-04-043761-803-125535.4 ppb
2017-04-043761-800-104539.3 ppb
2017-04-043761-802-121039.3 ppb
2017-04-043761-801-102049.7 ppb
2017-07-033761-803-123025.8 ppb
2017-07-033761-800-103427.9 ppb
2017-07-033761-802-120241.8 ppb
2017-07-033761-801-101439.5 ppb
2017-10-033761-801-10351.40 ppb
2017-10-033761-800-10502.60 ppb
2017-10-033761-802-12101.50 ppb
2017-10-033761-803-12402.60 ppb
2017-12-149588-027-0910ND