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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Western Allegheny County Mun A

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)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.594 ppb168ND - 2.10 ppb
20152.19 ppb1610ND - 9.00 ppb
20160.675 ppb164ND - 3.20 ppb
2017ND160ND
20180.261 ppb164ND - 1.60 ppb
20190.440 ppb167ND - 1.40 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
2014-02-1314022304-004ND
2014-02-1314022304-005ND
2014-02-1314022304-003ND
2014-02-1314022304-001ND
2014-05-1514053335-0041.000 ppb
2014-05-1514053335-0030.800 ppb
2014-05-1514053335-0020.800 ppb
2014-05-1514053335-0011.000 ppb
2014-08-1414081986-0042.10 ppb
2014-08-1414081986-0031.20 ppb
2014-08-1414081986-0011.60 ppb
2014-08-1414081986-0021.000 ppb
2014-11-1314111079-001ND
2014-11-1314111079-003ND
2014-11-1314111079-002ND
2014-11-1414111079-004ND
2015-02-1212691603ND
2015-02-1212691591ND
2015-02-1212691609ND
2015-02-1212691597ND
2015-05-14128153941.000 ppb
2015-05-1412815388ND
2015-05-1412815376ND
2015-05-14128153821.000 ppb
2015-09-18133276564.00 ppb
2015-09-18133276614.00 ppb
2015-09-18133276664.00 ppb
2015-09-18133276519.00 ppb
2015-11-12135729143.00 ppb
2015-11-12135729082.00 ppb
2015-11-12135729203.00 ppb
2015-11-12135729024.00 ppb
2016-02-1213927411ND
2016-02-1213927405ND
2016-02-1213927399ND
2016-02-1213927417ND
2016-05-1314327363ND
2016-05-1314327353ND
2016-05-1314327368ND
2016-05-1314327358ND
2016-08-12148207872.40 ppb
2016-08-12148207753.20 ppb
2016-08-12148207932.40 ppb
2016-08-12148207812.80 ppb
2016-11-1115295715ND
2016-11-1115295709ND
2016-11-1115295703ND
2016-11-1115295697ND
2017-02-1415721973ND
2017-02-1415721979ND
2017-02-1415721967ND
2017-02-1415721985ND
2017-05-1516174245ND
2017-05-1516174251ND
2017-05-1516174239ND
2017-05-1516174257ND
2017-08-1516644121ND
2017-08-1516644115ND
2017-08-1616644127ND
2017-08-1616644133ND
2017-11-1417090355ND
2017-11-1417090349ND
2017-11-1417090343ND
2017-11-1417090361ND
2018-02-1402181715ND
2018-02-1402181714ND
2018-02-1402181713ND
2018-02-1402181712ND
2018-05-1518E1306-01ND
2018-05-1518E1306-03ND
2018-05-1518E1306-04ND
2018-05-1518E1306-02ND
2018-08-1418H0527-020.625 ppb
2018-08-1418H0527-030.784 ppb
2018-08-1418H0527-041.17 ppb
2018-08-1418H0527-011.60 ppb
2018-11-1418K1387-04ND
2018-11-1418K1387-02ND
2018-11-1418K1387-01ND
2018-11-1418K1387-03ND
2019-02-1319B0577-02ND
2019-02-1319B0577-04ND
2019-02-1319B0577-01ND
2019-02-1319B0577-03ND
2019-05-1419E0304-03ND
2019-05-1419E0304-04ND
2019-05-1419E0304-01ND
2019-05-1419E0304-02ND
2019-08-1319H0345-030.830 ppb
2019-08-1319H0345-010.879 ppb
2019-08-1319H0345-040.727 ppb
2019-08-1319H0345-020.880 ppb
2019-11-1219K0332-041.21 ppb
2019-11-1219K0332-031.40 ppb
2019-11-1219K0332-02ND
2019-11-1219K0332-011.12 ppb