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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

CTWC - Shoreline Region-Guilford 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

 

163

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND290ND
2015ND280ND
2016ND270ND
20170.0242 ppb261ND - 0.630 ppb
2018ND270ND
2019ND260ND

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
2014-01-29140130CWCBVOC1ND
2014-02-242223VOC1ND
2014-03-052672VOC1ND
2014-03-213482THMND
2014-03-213483THMND
2014-03-213484THMND
2014-03-213485THMND
2014-04-215353VOC1ND
2014-04-215354VOC1ND
2014-06-128366VOC1ND
2014-06-128367VOC1ND
2014-06-128370VOC1ND
2014-06-188760THMND
2014-06-188761THMND
2014-06-188764THMND
2014-06-188765THMND
2014-08-13140915-0128VOC1ND
2014-08-13140915-0129VOC1ND
2014-08-13BG93593VOC1ND
2014-08-13BG93595VOC1ND
2014-09-15BH14101TTHMND
2014-09-15BH14102TTHMND
2014-09-15BH14103TTHMND
2014-09-15BH14104TTHMND
2014-11-03BH35439VOC1ND
2014-12-17BH54708TTHMND
2014-12-17BH54709TTHMND
2014-12-17BH54710TTHMND
2014-12-17BH54711TTHMND
2015-01-21BH65787VOC1ND
2015-02-12BH73177VOC1ND
2015-03-09BH80664VOC1ND
2015-03-11BH82212TTHMND
2015-03-11BH82211TTHMND
2015-03-11BH82209TTHMND
2015-03-11BH82210TTHMND
2015-06-02BJ24597VOC1ND
2015-06-02BJ24602VOC1ND
2015-06-02BJ24619VOC1ND
2015-06-02BJ24617VOC1ND
2015-06-03BJ25404VOC1ND
2015-06-16BJ31717TTHMND
2015-06-16BJ31716TTHMND
2015-06-16BJ31715TTHMND
2015-06-16BJ31718TTHMND
2015-07-27BJ63977VOC1ND
2015-07-27BJ63961VOC1ND
2015-09-15BJ92119TTHMND
2015-09-15BJ92122TTHMND
2015-09-15BJ92121TTHMND
2015-09-15BJ92120TTHMND
2015-10-19BK10284VOC1ND
2015-11-03BK17717VOC1ND
2015-12-08BK34310TTHMND
2015-12-08BK34311TTHMND
2015-12-08BK34312TTHMND
2015-12-08BK34309TTHMND
2016-01-11BK50864VOC1ND
2016-01-19BK54776VOC1ND
2016-01-19BK54777VOC1ND
2016-02-11BK64351VOC1ND
2016-03-14BK78125VOC1ND
2016-03-15BK78696TTHMND
2016-03-15BK78697TTHMND
2016-03-15BK78692TTHMND
2016-03-15BK78693TTHMND
2016-04-11BN11374VOC1ND
2016-04-11BN11376VOC1ND
2016-06-01BN44892VOC1ND
2016-06-01BN44876VOC1ND
2016-06-14BN54616TTHMND
2016-06-14BN54617TTHMND
2016-06-14BN54618TTHMND
2016-06-14BN54619TTHMND
2016-07-12BN71476VOC1ND
2016-07-13BN72282VOC1ND
2016-09-14BV14928TTHMND
2016-09-14BV14929TTHMND
2016-09-14BV14930TTHMND
2016-09-14BV14931TTHMND
2016-12-15BX06134TTHMND
2016-12-15BX06135TTHMND
2016-12-15BX06136TTHMND
2016-12-15BX06137TTHMND
2017-01-17BX30298VOC1ND
2017-01-17BX30299VOC1ND
2017-01-18BX31348VOC1ND
2017-01-30BX40966VOC1ND
2017-03-08BX82062VOC1ND
2017-03-17BX89076TTHMND
2017-03-17BX89077TTHMND
2017-03-17BX89078TTHMND
2017-03-17BX89073TTHMND
2017-06-19BY42240TTHMND
2017-06-19BY42241TTHMND
2017-06-19BY42242TTHMND
2017-06-19BY42243TTHMND
2017-06-29BY50637VOC1ND
2017-09-14BZ02387TTHMND
2017-09-14BZ02388TTHMND
2017-09-14BZ02389TTHMND
2017-09-14BZ02390TTHMND
2017-09-25BZ09163VOC1ND
2017-10-24BZ27135VOC10.630 ppb
2017-10-25BZ27134VOC1ND
2017-11-09BZ38785VOC1ND
2017-12-14BZ60231TTHMND
2017-12-14BZ60232TTHMND
2017-12-14BZ60233TTHMND
2017-12-14BZ60234TTHMND
2018-01-16BZ73485VOC1ND
2018-03-15CA03073TTHMND
2018-03-15CA03074TTHMND
2018-03-15CA03075TTHMND
2018-03-15CA03076TTHMND
2018-03-30CA11464VOC1ND
2018-04-11CA18261VOC1ND
2018-06-26CA80045TTHMND
2018-06-26CA80046TTHMND
2018-06-26CA80047TTHMND
2018-06-26CA80048TTHMND
2018-07-09CA85598VOC1ND
2018-07-17CA91979ND
2018-09-12DBP 200505042ND
2018-09-12DBP 200505043ND
2018-09-12DBP 200505044ND
2018-09-12DBP 200505047ND
2018-09-13VOC1 200505275ND
2018-09-13VOC1 200505276ND
2018-09-13VOC1 200505266ND
2018-09-19VOC1 200506116ND
2018-09-20VOC1 200506324ND
2018-10-25VOC1 200510568ND
2018-12-17DBP 200516235ND
2018-12-17DBP 200516237ND
2018-12-17DBP 200516238ND
2018-12-17DBP 200516239ND
2019-01-30VOC1 200520057ND
2019-03-11DBP 200524150ND
2019-03-11DBP 200524151ND
2019-03-11DBP 200524152ND
2019-03-11DBP 200524154ND
2019-06-14DBP 200536672ND
2019-06-14DBP 200536674ND
2019-06-14DBP 200536680ND
2019-06-14DBP 200536682ND
2019-06-24VOC1 200538005ND
2019-07-08VOC1 200541172ND
2019-07-08VOC1 200539194ND
2019-07-16VOC1 200541091ND
2019-07-16VOC1 200540648ND
2019-07-16VOC1 200540644ND
2019-09-17DBP 200549478ND
2019-09-17DBP 200549479ND
2019-09-17DBP 200549480ND
2019-09-17DBP 200549481ND
2019-09-17VOC1 200549238ND
2019-09-18VOC1 200549465ND
2019-12-10DBP 200559642ND
2019-12-10DBP 200559643ND
2019-12-10DBP 200559644ND
2019-12-10DBP 200559645ND
2019-12-10VOC1 200559663ND