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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Wallingford Water Department

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

 

67

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND60ND
2015ND50ND
20160.283 ppb62ND - 1.20 ppb
2017ND60ND
2018ND220ND
2019ND220ND

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
2014-01-28BG04311VOC1ND
2014-05-082638-5VOC1ND
2014-06-0304992VOC1ND
2014-06-0304990VOC1ND
2014-08-12BG92883VOC1ND
2014-11-242697-05VOC1ND
2015-04-132741-02VOC1ND
2015-04-132741-04VOC1ND
2015-06-012741-03VOC1ND
2015-08-192787-02VOC1ND
2015-11-032821-02VOC1ND
2016-01-122844-02VOC1ND
2016-01-122844-01VOC10.500 ppb
2016-02-022844-06VOC11.20 ppb
2016-04-19BN15871VOC1ND
2016-08-0912091VOC1ND
2016-11-022968-02VOC1ND
2017-01-193003-01VOC1ND
2017-01-193003-03VOC1ND
2017-03-163024-01VOC1ND
2017-05-25BY29408VOC1ND
2017-07-05BY53098VOC1ND
2017-11-14BZ42532VOC1ND
2018-03-05BZ98173ND
2018-03-05BZ98171ND
2018-03-05BZ98170ND
2018-03-05BZ98172ND
2018-03-05BZ98169ND
2018-04-17CA21065ND
2018-06-07CA66061ND
2018-06-07CA66062ND
2018-06-07CA66063ND
2018-06-07CA66064ND
2018-06-28CA80407ND
2018-07-17CA91980ND
2018-08-14CB11135ND
2018-09-13CB30627ND
2018-09-13CB30628ND
2018-09-13CB30629ND
2018-09-13CB30630ND
2018-10-11CB69933ND
2018-12-13CC13584ND
2018-12-13CC13585ND
2018-12-13CC13586ND
2018-12-13CC13587ND
2019-02-21CC55842-02ND
2019-03-06CC62592-02ND
2019-03-06CC62591-02ND
2019-03-14CC67794ND
2019-03-14CC67795ND
2019-03-14CC67793ND
2019-03-14CC67796ND
2019-04-08CC90384ND
2019-06-06CD28588ND
2019-06-06CD28589ND
2019-06-06CD28590ND
2019-06-06CD28591ND
2019-07-08CD51593ND
2019-09-123389-1ND
2019-09-123389-4ND
2019-09-123389-3ND
2019-09-123389-2ND
2019-10-10CE30938-VOCND
2019-12-053412-1ND
2019-12-053412-2ND
2019-12-053412-3ND
2019-12-053412-4ND