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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

South Norwalk Electric and Water

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)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0529 ppb171ND - 0.900 ppb
2015ND170ND
2016ND170ND
2017ND170ND
2018ND170ND
2019ND170ND

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
2014-02-1014021022-TTHMND
2014-02-1014021026-TTHMND
2014-02-1014021032-TTHMND
2014-02-1014021037-TTHMND
2014-05-0714050707-VOC1ND
2014-05-0714050722-TTHMND
2014-05-0714050726-TTHMND
2014-05-0714050732-TTHM0.900 ppb
2014-05-0714050737-TTHMND
2014-08-0414080422-TTHMND
2014-08-0414080426-TTHMND
2014-08-0414080432-TTHMND
2014-08-0414080437-TTHMND
2014-11-0314110322-TTHMND
2014-11-0314110326-TTHMND
2014-11-0314110332-TTHMND
2014-11-0314110337-TTHMND
2015-02-0315020322-TTHMND
2015-02-0315020332-TTHMND
2015-02-0315020326-TTHMND
2015-02-0315020337-TTHMND
2015-05-0615050626-TTHMND
2015-05-0615050622-TTHMND
2015-05-0615050632-TTHMND
2015-05-0615050637-TTHMND
2015-05-0615050607-VOC1ND
2015-08-0315080332-TTHMND
2015-08-0315080337-TTHMND
2015-08-0315080326-TTHMND
2015-08-0315080322-TTHMND
2015-11-1615111632-TTHMND
2015-11-1615111622-TTHMND
2015-11-1615111637-TTHMND
2015-11-1615111626-TTHMND
2016-02-0116020122-TTHMND
2016-02-0116020126-TTHMND
2016-02-0116020132-TTHMND
2016-02-0116020137-TTHMND
2016-05-1116051122-TTHMND
2016-05-1116051126-TTHMND
2016-05-1116051132-TTHMND
2016-05-1116051137-TTHMND
2016-05-1116051107-VOC1ND
2016-08-0316080322-TTHMND
2016-08-0316080326-TTHMND
2016-08-0316080332-TTHMND
2016-08-0316080337-TTHMND
2016-11-0216110222-TTHMND
2016-11-0216110226-TTHMND
2016-11-0216110232-TTHMND
2016-11-0216110237-TTHMND
2017-02-0617020622-TTHMND
2017-02-0617020626-TTHMND
2017-02-0617020632-TTHMND
2017-02-0617020637-TTHMND
2017-05-0217050222-TTHMND
2017-05-0217050226-TTHMND
2017-05-0217050232-TTHMND
2017-05-0217050237-TTHMND
2017-05-0217050207-VOC1ND
2017-08-0217080222-TTHMND
2017-08-0217080226-TTHMND
2017-08-0217080232-TTHMND
2017-08-0217080237-TTHMND
2017-11-0717110722-TTHMND
2017-11-0717110726-TTHMND
2017-11-0717110732-TTHMND
2017-11-0717110737-TTHMND
2018-02-0618020622-TTHMND
2018-02-0618020626-TTHMND
2018-02-0618020632-TTHMND
2018-02-0618020637-TTHMND
2018-05-0918050922-TTHMND
2018-05-0918050926-TTHMND
2018-05-0918050932-TTHMND
2018-05-0918050937-TTHMND
2018-05-0918050907-VOC1ND
2018-08-0718080722-TTHMND
2018-08-0718080726-TTHMND
2018-08-0718080732-TTHMND
2018-08-0718080737-TTHMND
2018-11-0618110622-TTHMND
2018-11-0618110626-TTHMND
2018-11-0618110632-TTHMND
2018-11-2918112937-TTHMND
2019-02-1319021322-TTHMND
2019-02-1319021326-TTHMND
2019-02-1319021332-TTHMND
2019-02-1319021337-TTHMND
2019-05-0719050732-TTHMND
2019-05-0719050737-TTHMND
2019-05-0719050722-TTHMND
2019-05-0719050726-TTHMND
2019-05-0919050907-VOC1ND
2019-08-0619080622-TTHMND
2019-08-0619080626-TTHMND
2019-08-0619080632-TTHMND
2019-08-0619080639-TTHMND
2019-11-1319111322-TTHMND
2019-11-1319111326-TTHMND
2019-11-1319111332-TTHMND
2019-11-1319111339-TTHMND