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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Southwestern Pennsylvania Water Authority

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)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.313 ppb165ND - 1.000 ppb
20150.631 ppb168ND - 2.00 ppb
20160.125 ppb162ND - 1.000 ppb
2017ND160ND
2018ND160ND
20190.248 ppb165ND - 0.986 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
2014-02-12021408141.000 ppb
2014-02-1202140815ND
2014-02-12021408161.000 ppb
2014-02-1302140817ND
2014-05-1405141134ND
2014-05-1405141137ND
2014-05-1405141135ND
2014-05-1405141136ND
2014-08-14081411781.000 ppb
2014-08-14081411811.000 ppb
2014-08-14081411801.000 ppb
2014-08-1408141179ND
2014-11-1611141723ND
2014-11-1611141724ND
2014-11-1611141722ND
2014-11-1611141721ND
2015-02-1112464480ND
2015-02-1112464475ND
2015-02-1112464465ND
2015-02-1112464470ND
2015-05-13128219921.000 ppb
2015-05-1312821987ND
2015-05-1312821977ND
2015-05-13128219821.000 ppb
2015-08-12132057831.30 ppb
2015-08-12132057781.20 ppb
2015-08-12132057731.000 ppb
2015-08-12132057880.600 ppb
2015-11-11135795502.00 ppb
2015-11-1113579549ND
2015-11-1113579551ND
2015-11-11135795522.00 ppb
2016-02-1213933394ND
2016-02-1213933389ND
2016-02-1213933384ND
2016-02-1213933399ND
2016-05-1114337533ND
2016-05-1114337527ND
2016-05-1114337536ND
2016-05-1114337530ND
2016-08-1514832583ND
2016-08-1514832581ND
2016-08-15148325801.000 ppb
2016-08-15148325821.000 ppb
2016-11-0915307018ND
2016-11-0915307017ND
2016-11-1015307015ND
2016-11-1015307016ND
2017-02-1415732168ND
2017-02-1415732174ND
2017-02-1415732162ND
2017-02-1415732180ND
2017-05-1516184985ND
2017-05-1516184991ND
2017-05-1516184979ND
2017-05-1516184997ND
2017-08-1416655098ND
2017-08-1416655092ND
2017-08-1416655086ND
2017-08-1416655104ND
2017-11-1417099828ND
2017-11-1417099822ND
2017-11-1417099816ND
2017-11-1417099834ND
2018-02-1302181806ND
2018-02-1302181805ND
2018-02-1302181804ND
2018-02-1302181803ND
2018-05-1518E1317-01ND
2018-05-1518E1317-03ND
2018-05-1518E1317-04ND
2018-05-1518E1317-02ND
2018-08-1418H0492-02ND
2018-08-1418H0492-03ND
2018-08-1418H0492-04ND
2018-08-1418H0492-01ND
2018-11-1318K1412-04ND
2018-11-1318K1412-02ND
2018-11-1318K1412-01ND
2018-11-1318K1412-03ND
2019-02-1219B0644-02ND
2019-02-1219B0644-04ND
2019-02-1219B0644-01ND
2019-02-1219B0644-03ND
2019-05-1419E0256-03ND
2019-05-1419E0256-04ND
2019-05-1419E0256-01ND
2019-05-1419E0256-02ND
2019-08-1319H0286-030.918 ppb
2019-08-1319H0286-010.986 ppb
2019-08-1319H0286-040.829 ppb
2019-08-1319H0286-020.706 ppb
2019-11-1219K0283-04ND
2019-11-1219K0283-02ND
2019-11-1319K0283-03ND
2019-11-1419K1869-010.522 ppb