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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Yorktown Water

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.

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND60ND
2016ND80ND
2017ND20ND
2018ND50ND
2019ND50ND

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

Date Lab ID Result
2014-04-0914100003602ND
2014-04-0914100003401ND
2014-04-0914100003701ND
2014-04-0914100003501ND
2014-08-1114226000802ND
2014-08-1114226000902ND
2015-05-2615148007401ND
2015-05-2615148007502ND
2015-05-2615148007601ND
2015-05-2615148007301ND
2015-06-2215176000202ND
2015-07-2215204000202ND
2016-06-1416168007201ND
2016-06-1416168005301ND
2016-06-1416168005401ND
2016-06-1416168005201ND
2016-06-1416168004601ND
2016-06-1416168007102ND
2016-06-1416168007301ND
2016-06-2216175003902ND
2017-05-3017152005802ND
2017-06-2617179000702ND
2018-05-2918151003501ND
2018-06-0418158002202ND
2018-08-2018235005901ND
2018-08-2018235006001ND
2018-08-2018235006101ND
2019-05-0619129006501ND
2019-05-0619129005801ND
2019-05-0619129006401ND
2019-05-0619129006601ND
2019-07-0119184003501ND