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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Lake County West 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

 

192

Samples

0

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.372 ppb3216ND - 0.800 ppb
20150.260 ppb4018ND - 0.800 ppb
20160.288 ppb3215ND - 0.700 ppb
20170.441 ppb3224ND - 0.700 ppb
20180.322 ppb3216ND - 0.800 ppb
20190.354 ppb2413ND - 0.800 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
2014-02-1114-11711-06ND
2014-02-1114-11711-07ND
2014-02-1114-11711-08ND
2014-02-1114-11711-01ND
2014-02-1114-11711-02ND
2014-02-1114-11711-03ND
2014-02-1114-11711-04ND
2014-02-1114-11711-05ND
2014-05-1214-15892-01ND
2014-05-1214-15892-02ND
2014-05-1214-15892-03ND
2014-05-1214-15892-04ND
2014-05-1214-15892-05ND
2014-05-1214-15892-06ND
2014-05-1214-15892-07ND
2014-05-1214-15892-08ND
2014-08-1114-20842-010.800 ppb
2014-08-1114-20842-020.700 ppb
2014-08-1114-20842-030.800 ppb
2014-08-1114-20842-040.800 ppb
2014-08-1114-20842-050.700 ppb
2014-08-1114-20842-060.600 ppb
2014-08-1114-20842-070.800 ppb
2014-08-1114-20842-080.700 ppb
2014-11-1214-25635-010.800 ppb
2014-11-1214-25635-020.800 ppb
2014-11-1214-25635-030.800 ppb
2014-11-1214-25635-040.800 ppb
2014-11-1214-25635-050.700 ppb
2014-11-1214-25635-060.700 ppb
2014-11-1214-25635-070.700 ppb
2014-11-1214-25635-080.700 ppb
2015-02-1015021054-001ND
2015-02-1015021054-002ND
2015-02-1015021054-003ND
2015-02-1015021054-004ND
2015-02-1015021054-005ND
2015-02-1015021054-006ND
2015-02-1015021054-007ND
2015-02-1015021054-008ND
2015-05-2215-16839-010.700 ppb
2015-05-2215-16839-020.500 ppb
2015-05-2215-16839-030.600 ppb
2015-05-2215-16839-040.500 ppb
2015-05-2215-16839-05ND
2015-05-2215-16839-06ND
2015-05-2215-16839-07ND
2015-05-2215-16839-080.500 ppb
2015-05-2215052762-001ND
2015-05-2215052762-002ND
2015-05-2215052762-003ND
2015-05-2215052762-004ND
2015-05-2215052762-005ND
2015-05-2215052762-006ND
2015-05-2215052762-007ND
2015-05-2215052762-008ND
2015-08-1015-21525-010.600 ppb
2015-08-1015-21525-020.600 ppb
2015-08-1015-21525-030.800 ppb
2015-08-1015-21525-040.600 ppb
2015-08-1015-21525-050.600 ppb
2015-08-1015-21525-060.600 ppb
2015-08-1015-21525-070.600 ppb
2015-08-1015-21525-080.600 ppb
2015-11-1015-26611-01ND
2015-11-1015-26611-02ND
2015-11-1015-26611-030.500 ppb
2015-11-1015-26611-040.500 ppb
2015-11-1015-26611-05ND
2015-11-1015-26611-060.500 ppb
2015-11-1015-26611-070.600 ppb
2015-11-1015-26611-080.500 ppb
2016-02-0816-12017-010.600 ppb
2016-02-0816-12017-020.500 ppb
2016-02-0816-12017-030.600 ppb
2016-02-0816-12017-040.500 ppb
2016-02-0816-12017-050.500 ppb
2016-02-0816-12017-06ND
2016-02-0816-12017-070.500 ppb
2016-02-0816-12017-08ND
2016-05-0916-16697-01ND
2016-05-0916-16697-02ND
2016-05-0916-16697-03ND
2016-05-0916-16697-04ND
2016-05-0916-16697-05ND
2016-05-0916-16697-06ND
2016-05-0916-16697-07ND
2016-05-0916-16697-08ND
2016-08-0816-22697-010.700 ppb
2016-08-0816-22697-020.600 ppb
2016-08-0816-22697-030.700 ppb
2016-08-0816-22697-040.700 ppb
2016-08-0816-22697-050.700 ppb
2016-08-0816-22697-060.700 ppb
2016-08-0816-22697-070.700 ppb
2016-08-0816-22697-080.700 ppb
2016-11-0816-29030-010.500 ppb
2016-11-0816-29030-02ND
2016-11-0816-29030-03ND
2016-11-0816-29030-04ND
2016-11-0816-29030-05ND
2016-11-0816-29030-06ND
2016-11-0816-29030-07ND
2016-11-0816-29030-08ND
2017-02-1017-12555-010.600 ppb
2017-02-1017-12555-020.500 ppb
2017-02-1017-12555-030.600 ppb
2017-02-1017-12555-040.500 ppb
2017-02-1017-12555-05ND
2017-02-1017-12555-060.500 ppb
2017-02-1017-12555-070.500 ppb
2017-02-1017-12555-080.500 ppb
2017-05-0817-18058-010.600 ppb
2017-05-0817-18058-020.500 ppb
2017-05-0817-18058-030.600 ppb
2017-05-0817-18058-040.600 ppb
2017-05-0817-18058-050.500 ppb
2017-05-0817-18058-060.500 ppb
2017-05-0817-18058-070.500 ppb
2017-05-0817-18058-08ND
2017-08-0817-25033-010.700 ppb
2017-08-0817-25033-020.700 ppb
2017-08-0817-25033-030.700 ppb
2017-08-0817-25033-040.700 ppb
2017-08-0817-25033-050.700 ppb
2017-08-0817-25033-060.700 ppb
2017-08-0817-25033-070.700 ppb
2017-08-0817-25033-080.700 ppb
2017-11-0917-31943-01ND
2017-11-0917-31943-02ND
2017-11-0917-31943-030.500 ppb
2017-11-0917-31943-040.500 ppb
2017-11-0917-31943-05ND
2017-11-0917-31943-06ND
2017-11-0917-31943-07ND
2017-11-0917-31943-08ND
2018-02-13M18-12616-01ND
2018-02-13M18-12616-02ND
2018-02-13M18-12616-03ND
2018-02-13M18-12616-04ND
2018-02-13M18-12616-05ND
2018-02-13M18-12616-06ND
2018-02-13M18-12616-07ND
2018-02-13M18-12616-08ND
2018-05-0818-18770-01ND
2018-05-0818-18770-02ND
2018-05-0818-18770-03ND
2018-05-0818-18770-04ND
2018-05-0818-18770-05ND
2018-05-0818-18770-06ND
2018-05-0818-18770-07ND
2018-05-0818-18770-08ND
2018-08-0818-26752-010.800 ppb
2018-08-0818-26752-020.700 ppb
2018-08-0818-26752-030.800 ppb
2018-08-0818-26752-040.700 ppb
2018-08-0818-26752-050.700 ppb
2018-08-0818-26752-060.700 ppb
2018-08-0818-26752-070.700 ppb
2018-08-0818-26752-080.800 ppb
2018-11-0918-34952-010.600 ppb
2018-11-0918-34952-020.600 ppb
2018-11-0918-34952-030.600 ppb
2018-11-0918-34952-040.500 ppb
2018-11-0918-34952-050.500 ppb
2018-11-0918-34952-060.500 ppb
2018-11-0918-34952-070.600 ppb
2018-11-0918-34952-080.500 ppb
2019-02-11M19-13053-010.500 ppb
2019-02-11M19-13053-02ND
2019-02-11M19-13053-030.500 ppb
2019-02-11M19-13053-040.500 ppb
2019-02-11M19-13053-05ND
2019-02-11M19-13053-06ND
2019-02-11M19-13053-07ND
2019-02-11M19-13053-08ND
2019-05-1319-19680-010.500 ppb
2019-05-1319-19680-02ND
2019-05-1319-19680-030.500 ppb
2019-05-1319-19680-04ND
2019-05-1319-19680-05ND
2019-05-1319-19680-06ND
2019-05-1319-19680-07ND
2019-05-1319-19680-08ND
2019-08-1219-27652-010.800 ppb
2019-08-1219-27652-020.700 ppb
2019-08-1219-27652-030.800 ppb
2019-08-1219-27652-040.700 ppb
2019-08-1219-27652-050.700 ppb
2019-08-1219-27652-060.700 ppb
2019-08-1219-27652-070.800 ppb
2019-08-1219-27652-080.800 ppb