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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Lake County East Water Subdistrict

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.306 ppb167ND - 0.900 ppb
20150.0625 ppb162ND - 0.500 ppb
20160.269 ppb167ND - 0.700 ppb
20170.456 ppb1613ND - 0.700 ppb
20180.175 ppb165ND - 0.600 ppb
20190.317 ppb125ND - 0.900 ppb

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
2014-02-1114-11664-04ND
2014-02-1114-11664-03ND
2014-02-1114-11664-02ND
2014-02-1114-11664-01ND
2014-05-1214-15893-02ND
2014-05-1214-15893-01ND
2014-05-1214-15893-03ND
2014-05-1214-15893-04ND
2014-08-1114-20696-040.900 ppb
2014-08-1114-20696-010.700 ppb
2014-08-1114-20696-020.600 ppb
2014-08-1114-20696-030.700 ppb
2014-11-1214-25636-010.700 ppb
2014-11-1214-25636-020.700 ppb
2014-11-1214-25636-030.600 ppb
2014-11-1214-25636-04ND
2015-02-1015021012-003ND
2015-02-1015021012-004ND
2015-02-1015021012-002ND
2015-02-1015021012-001ND
2015-05-1215-16156-04ND
2015-05-1215-16156-03ND
2015-05-1215-16156-02ND
2015-05-1215-16156-01ND
2015-08-1115-21507-04ND
2015-08-1115-21507-030.500 ppb
2015-08-1115-21507-02ND
2015-08-1115-21507-01ND
2015-11-1015-26595-040.500 ppb
2015-11-1015-26595-05ND
2015-11-1015-26595-06ND
2015-11-1015-26595-03ND
2016-02-0816-11920-02ND
2016-02-0816-11920-04ND
2016-02-0816-11920-030.700 ppb
2016-02-0816-11920-010.600 ppb
2016-05-0916-16626-03ND
2016-05-0916-16626-04ND
2016-05-0916-16626-05ND
2016-05-0916-16626-06ND
2016-08-0816-22699-03ND
2016-08-0816-22699-04ND
2016-08-0816-22699-050.500 ppb
2016-08-0816-22699-06ND
2016-11-0816-28918-060.600 ppb
2016-11-0816-28918-050.600 ppb
2016-11-0816-28918-030.700 ppb
2016-11-0816-28918-040.600 ppb
2017-02-1017-12553-04ND
2017-02-1017-12553-050.500 ppb
2017-02-1017-12553-060.500 ppb
2017-02-1017-12553-030.600 ppb
2017-05-0817-18055-030.500 ppb
2017-05-0817-18055-040.500 ppb
2017-05-0817-18055-050.500 ppb
2017-05-0817-18055-06ND
2017-08-0817-25100-060.700 ppb
2017-08-0817-25100-050.700 ppb
2017-08-0817-25100-040.600 ppb
2017-08-0817-25100-030.600 ppb
2017-11-0917-32038-030.500 ppb
2017-11-0917-32038-040.500 ppb
2017-11-0917-32038-050.600 ppb
2017-11-0917-32038-06ND
2018-02-1318-12779-03ND
2018-02-1318-12779-04ND
2018-02-1318-12779-05ND
2018-02-1318-12779-06ND
2018-05-0818-18593-06ND
2018-05-0818-18593-04ND
2018-05-0818-18593-030.500 ppb
2018-05-0818-18593-05ND
2018-08-0818-26716-030.600 ppb
2018-08-0818-26716-040.500 ppb
2018-08-0818-26716-050.600 ppb
2018-08-0818-26716-06ND
2018-11-0918-34949-030.600 ppb
2018-11-0918-34949-04ND
2018-11-0918-34949-05ND
2018-11-0918-34949-06ND
2019-02-11M19-12878-06ND
2019-02-11M19-12878-05ND
2019-02-11M19-12878-04ND
2019-02-11M19-12878-030.500 ppb
2019-05-1319-19682-04ND
2019-05-1319-19682-06ND
2019-05-1319-19682-05ND
2019-05-1319-19682-03ND
2019-08-12M19-27624-030.900 ppb
2019-08-12M19-27624-040.800 ppb
2019-08-12M19-27624-050.800 ppb
2019-08-12M19-27624-060.800 ppb