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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Thomas Hill PWSD 1

NOTE: Thomas Hill PWSD 1 purchases water from Clarence Cannon Wholesale Water Commission which is required to test for bromoform. Sample information shown below was taken by Clarence Cannon Wholesale Water Commission.

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND80ND
2016ND80ND
2017ND80ND
2018ND80ND
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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

NOTE: Thomas Hill PWSD 1 purchases water from Clarence Cannon Wholesale Water Commission which is required to test for bromoform. Sample information shown below was taken by Clarence Cannon Wholesale Water Commission.

Date Lab ID Result
2014-02-26AC18136ND
2014-05-19AC23144ND
2014-08-21AC33203ND
2014-11-12AC38857ND
2014-12-04AC39975ND
2015-02-26AC43246ND
2015-05-18AC46492ND
2015-08-25AC57338ND
2015-11-10AC62754ND
2015-12-18AC64703ND
2016-02-11AC66296ND
2016-05-11AC71989ND
2016-08-15AC81588ND
2016-11-07AC86888ND
2016-11-08AC87440ND
2017-02-09AC90752ND
2017-05-08AC95723ND
2017-08-07AD03309ND
2017-11-07AD09437ND
2017-11-08AD10095ND
2017-12-11AD11018ND
2018-02-12AD14223ND
2018-05-08AD20456ND
2018-08-05AD31129ND
2018-11-02AD35666ND
2018-11-05AD36259ND
2019-01-31AD39215ND
2019-02-18AD39334ND
2019-04-09AD46647ND
2019-05-14AD47415ND
2019-07-11AD52705ND
2019-08-15AD53854ND
2019-10-21AD57363ND
2019-11-20AD58041ND