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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Borough of Atglen

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
20160.700 ppb220.700 ppb
20170.225 ppb82ND - 1.000 ppb
20180.150 ppb81ND - 1.20 ppb
20190.175 ppb81ND - 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
2016-12-19153661920.700 ppb
2016-12-19153661980.700 ppb
2017-02-1415650037ND
2017-02-1415650043ND
2017-05-1516088523ND
2017-05-1516088528ND
2017-08-14167213570.800 ppb
2017-08-14167213631.000 ppb
2017-11-2817156497ND
2017-11-2817156491ND
2018-02-138022191-02ND
2018-02-138022191-01ND
2018-05-158051853-01ND
2018-05-158051853-02ND
2018-08-148081652-01RE1.20 ppb
2018-08-148081652-02ND
2018-11-138111380-01ND
2018-11-138111380-02ND
2019-02-139021440-01ND
2019-02-139021440-02ND
2019-05-149051107-01ND
2019-05-149051107-02ND
2019-08-139082120-011.40 ppb
2019-08-139082120-02ND
2019-11-129112093-02ND
2019-11-129112093-01ND