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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Lancaster

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.63 ppb1615ND - 2.60 ppb
20150.438 ppb164ND - 2.00 ppb
2016ND160ND
20170.312 ppb164ND - 1.31 ppb
20181.28 ppb1613ND - 2.25 ppb
20190.565 ppb168ND - 1.30 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
2014-02-24Q14058510041.96 ppb
2014-02-24Q14058510032.33 ppb
2014-02-24Q14058510022.14 ppb
2014-02-24Q14058510012.09 ppb
2014-05-16Q14166690041.10 ppb
2014-05-16Q14166690031.60 ppb
2014-05-16Q14166690021.30 ppb
2014-05-16Q14166690011.30 ppb
2014-07-10Q14271720041.10 ppb
2014-07-10Q14271720031.20 ppb
2014-07-10Q1427172005ND
2014-07-10Q14271720061.000 ppb
2014-10-28Q14544410042.00 ppb
2014-10-28Q14544410032.00 ppb
2014-10-28Q14544410022.60 ppb
2014-10-28Q14544410012.30 ppb
2015-03-19Q15104650051.20 ppb
2015-03-19Q15104650041.80 ppb
2015-03-19Q15104650032.00 ppb
2015-03-19Q15104650022.00 ppb
2015-06-16Q1522405001ND
2015-06-16Q1522405002ND
2015-06-16Q1522405004ND
2015-06-16Q1522405003ND
2015-08-18Q1532666004ND
2015-08-18Q1532666003ND
2015-08-18Q1532666002ND
2015-08-18Q1532666001ND
2015-10-21Q1541383004ND
2015-10-21Q1541383003ND
2015-10-21Q1541383002ND
2015-10-21Q1541383001ND
2016-01-21Q1602700002ND
2016-01-21Q1602700001ND
2016-01-21Q1602700003ND
2016-01-21Q1602700004ND
2016-04-14Q1614883004ND
2016-04-14Q1614883003ND
2016-04-14Q1614883002ND
2016-04-14Q1614883001ND
2016-07-05Q1626763004ND
2016-07-05Q1626763003ND
2016-07-05Q1626763002ND
2016-07-05Q1626763001ND
2016-10-07Q1642683001ND
2016-10-07Q1642683004ND
2016-10-07Q1642683003ND
2016-10-07Q1642683002ND
2017-01-10Q1700958002ND
2017-01-10Q1700958004ND
2017-01-10Q1700958001ND
2017-01-10Q1700958003ND
2017-04-04Q1713778003ND
2017-04-04Q1713778006ND
2017-04-04Q1713778002ND
2017-04-04Q1713778005ND
2017-07-05Q1727591003ND
2017-07-05Q1727591001ND
2017-07-05Q1727591002ND
2017-07-05Q1727591004ND
2017-10-16Q17535590021.31 ppb
2017-10-16Q17535590031.12 ppb
2017-10-16Q17535590041.30 ppb
2017-10-16Q17535590011.26 ppb
2018-01-31Q18039890041.29 ppb
2018-01-31Q18039890021.45 ppb
2018-01-31Q18039890031.49 ppb
2018-01-31Q18039890011.47 ppb
2018-04-12Q18152360022.05 ppb
2018-04-12Q18152360051.92 ppb
2018-04-12Q18152360031.76 ppb
2018-04-12Q18152360062.25 ppb
2018-07-12Q18277210041.52 ppb
2018-07-12Q18277210021.29 ppb
2018-07-12Q18277210031.46 ppb
2018-07-12Q18277210011.45 ppb
2018-10-11Q1840581004ND
2018-10-11Q1840581002ND
2018-10-11Q1840581003ND
2018-10-11Q18405810011.04 ppb
2019-01-09Q1901141002ND
2019-01-09Q1901141005ND
2019-01-09Q1901141004ND
2019-01-09Q1901141003ND
2019-04-15Q19150180031.14 ppb
2019-04-15Q19150180021.19 ppb
2019-04-15Q19150180011.30 ppb
2019-06-19Q19386270011.13 ppb
2019-08-06Q19517980041.03 ppb
2019-08-06Q1951798003ND
2019-08-06Q1951798002ND
2019-08-06Q1951798001ND
2019-10-10Q19722520021.12 ppb
2019-10-10Q19722520051.07 ppb
2019-10-10Q1972252004ND
2019-10-10Q19722520031.06 ppb