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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Riverton City Water System

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

 

102

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.07 ppb184ND - 9.40 ppb
20150.193 ppb173ND - 2.10 ppb
20160.523 ppb152ND - 5.08 ppb
2017ND150ND
2018ND160ND
20190.0619 ppb212ND - 0.650 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 Result
2014-02-20ND
2014-02-20ND
2014-02-20ND
2014-02-204.10 ppb
2014-05-149.40 ppb
2014-05-14ND
2014-05-14ND
2014-05-14ND
2014-07-22ND
2014-07-22ND
2014-08-05ND
2014-08-05ND
2014-08-05ND
2014-08-054.90 ppb
2014-11-05ND
2014-11-05ND
2014-11-05ND
2014-11-050.900 ppb
2015-02-04ND
2015-02-04ND
2015-02-042.10 ppb
2015-02-04ND
2015-05-20ND
2015-05-20ND
2015-05-20ND
2015-05-200.574 ppb
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-08-110.608 ppb
2015-11-10ND
2015-11-10ND
2015-11-10ND
2015-11-10ND
2015-11-10ND
2016-02-12ND
2016-02-12ND
2016-02-12ND
2016-02-12ND
2016-02-12ND
2016-08-10ND
2016-08-10ND
2016-08-10ND
2016-08-10ND
2016-08-10ND
2016-11-152.77 ppb
2016-11-15ND
2016-11-15ND
2016-11-15ND
2016-11-155.08 ppb
2017-02-15ND
2017-02-15ND
2017-02-15ND
2017-02-15ND
2017-02-15ND
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-11-14ND
2017-11-14ND
2017-11-14ND
2017-11-14ND
2017-11-14ND
2018-05-10ND
2018-05-10ND
2018-05-10ND
2018-05-10ND
2018-05-10ND
2018-08-09ND
2018-08-09ND
2018-08-09ND
2018-08-09ND
2018-08-09ND
2018-11-14ND
2018-11-14ND
2018-11-14ND
2018-11-14ND
2018-11-14ND
2018-12-18ND
2019-02-12ND
2019-02-12ND
2019-02-12ND
2019-02-12ND
2019-02-12ND
2019-05-07ND
2019-05-07ND
2019-05-07ND
2019-05-07ND
2019-05-07ND
2019-07-09ND
2019-08-06ND
2019-08-06ND
2019-08-06ND
2019-08-06ND
2019-08-06ND
2019-11-11ND
2019-11-11ND
2019-11-11ND
2019-11-110.650 ppb
2019-11-110.650 ppb