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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

CTWC - Unionville 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

 

165

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0309 ppb432ND - 0.770 ppb
20150.0494 ppb312ND - 0.930 ppb
20160.0600 ppb303ND - 0.610 ppb
20170.179 ppb245ND - 1.20 ppb
20180.0284 ppb191ND - 0.540 ppb
2019ND180ND

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
2014-01-21BG01724VOC1ND
2014-01-22BG01725VOC1ND
2014-01-22BG01726VOC1ND
2014-01-22BG017276VOC1ND
2014-01-22BG01727VOC1ND
2014-01-22BG01728VOC1ND
2014-01-22BG02299TTHMND
2014-01-23BG02294TTHMND
2014-01-23BG02295TTHMND
2014-01-23BG02296TTHMND
2014-01-23BG02297TTHMND
2014-01-23BG02298TTHMND
2014-01-23BG02300TTHMND
2014-01-31BG02295THMND
2014-01-31BG06715TTHMND
2014-01-31BG06716TTHMND
2014-01-31BG06717TTHMND
2014-01-31BG06718THMND
2014-01-31BG06718TTHMND
2014-02-12BG09383VOC10.770 ppb
2014-04-02BG26931VOC10.560 ppb
2014-04-03BG26932VOC1ND
2014-04-03BG26933VOC1ND
2014-04-22BG36625THMND
2014-04-22BG36625TTHMND
2014-04-22BG36626TTHMND
2014-04-22BG36627TTHMND
2014-04-22BG36628THMND
2014-04-22BG36628TTHMND
2014-07-09BG72399VOC1ND
2014-07-09BG72400VOC1ND
2014-07-09BG72401VOC1ND
2014-07-22BG81008TTHMND
2014-07-22BG81009TTHMND
2014-07-22BG81010TTHMND
2014-07-22BG81011TTHMND
2014-10-01BH22261VOC1ND
2014-10-16BH28261VOC1ND
2014-10-16BH28262VOC1ND
2014-10-22BH31458TTHMND
2014-10-22BH31459TTHMND
2014-10-22BH31460TTHMND
2014-10-22BH31461TTHMND
2015-01-07BH61112VOC1ND
2015-01-07BH61113VOC1ND
2015-01-07BH61114VOC1ND
2015-01-07BH61115VOC1ND
2015-01-07BH61116VOC1ND
2015-01-21BH66106TTHMND
2015-01-21BH66104TTHMND
2015-01-21BH66105TTHMND
2015-01-21BH66103TTHMND
2015-01-22BH66100VOC1ND
2015-04-27BJ08473TTHMND
2015-04-27BJ08472TTHMND
2015-04-28BJ08471TTHMND
2015-04-28BJ08474TTHMND
2015-04-28BJ08475VOC1ND
2015-04-28BJ08476VOC1ND
2015-05-05BJ12368VOC1ND
2015-07-15BJ47000VOC1ND
2015-07-15BJ47001VOC1ND
2015-07-20BJ60684TTHMND
2015-07-20BJ60685TTHMND
2015-07-20BJ60682TTHMND
2015-07-21BJ60686TTHM0.930 ppb
2015-08-05BJ69611VOC1ND
2015-10-05BK02873TTHMND
2015-10-05BK02871TTHMND
2015-10-06BK02872TTHMND
2015-10-06BK02876VOC10.600 ppb
2015-10-06BK02877VOC1ND
2015-10-06BK02878VOC1ND
2015-10-20BK11417TTHMND
2016-01-11BK51263TTHMND
2016-01-11BK51264TTHMND
2016-01-11BK51265TTHMND
2016-01-11BK51257VOC1ND
2016-01-11BK51258VOC1ND
2016-01-11BK51260VOC1ND
2016-01-11BK51261VOC1ND
2016-01-11BK51259VOC1ND
2016-01-18BK54312TTHMND
2016-04-11BN12525VOC1ND
2016-04-11BN12526VOC1ND
2016-04-11BN12527VOC1ND
2016-04-18BN15772TTHMND
2016-04-18BN15773TTHMND
2016-04-18BN15774TTHMND
2016-04-18BN15775TTHMND
2016-07-12BN71240TTHMND
2016-07-12BN71241TTHM0.600 ppb
2016-07-13BN72150TTHMND
2016-07-13BN72151TTHM0.590 ppb
2016-08-16BN92944VOC1ND
2016-08-16BN92945VOC1ND
2016-08-16BN92946VOC1ND
2016-10-04BV35900TTHM0.610 ppb
2016-10-04BV35901TTHMND
2016-10-04BV35905TTHMND
2016-10-11BV44240TTHMND
2016-10-24BV62669VOC1ND
2016-10-24BV62670VOC1ND
2016-11-01BV72457VOC1ND
2017-01-17BX30317TTHMND
2017-01-17BX30318TTHMND
2017-01-17BX30319TTHMND
2017-01-17BX30320TTHMND
2017-04-11BY02319TTHMND
2017-04-11BY02320TTHMND
2017-04-11BY02321TTHMND
2017-04-11BY02322TTHMND
2017-05-23BY28459VOC10.610 ppb
2017-07-18BY63323TTHMND
2017-07-18BY63324TTHM0.730 ppb
2017-07-18BY63325TTHMND
2017-07-18BY63326TTHMND
2017-07-25BY71391VOC1ND
2017-07-25BY71392VOC1ND
2017-07-25BY71394VOC1ND
2017-07-25BY71393VOC1ND
2017-08-15BY84216VOC1ND
2017-10-24BZ26033TTHM1.10 ppb
2017-10-24BZ26034TTHM0.660 ppb
2017-10-24BZ26035TTHMND
2017-10-24BZ26036TTHM1.20 ppb
2017-10-27BZ28354VOC1ND
2017-11-28BZ47211VOC1ND
2018-01-16BZ73286TTHMND
2018-01-16BZ73287TTHMND
2018-01-16BZ73288TTHMND
2018-01-16BZ73289TTHMND
2018-04-27CA37381TTHMND
2018-04-27CA37382TTHMND
2018-04-27CA37383TTHMND
2018-04-27CA37384TTHMND
2018-07-23CA96742ND
2018-07-23CA96743ND
2018-07-24CA96734ND
2018-07-24CA96735ND
2018-07-24CA96736ND
2018-07-24CA967370.540 ppb
2018-07-31CB01360ND
2018-10-02DBP 200507665ND
2018-10-02DBP 200507666ND
2018-10-02DBP 200507667ND
2018-10-02DBP 200508020ND
2019-01-08DBP 200518130ND
2019-01-08DBP 200518136ND
2019-01-08DBP 200518139ND
2019-01-08DBP 200518143ND
2019-01-29VOC1 200520002ND
2019-01-29VOC1 200519997ND
2019-04-09DBP 200527846ND
2019-04-09DBP 200527847ND
2019-04-09DBP 200527848ND
2019-04-09DBP 200527849ND
2019-07-02DBP 200538986ND
2019-07-02DBP 200538987ND
2019-07-02DBP 200538988ND
2019-07-02DBP 200538989ND
2019-10-08DBP 200552012ND
2019-10-08DBP 200552013ND
2019-10-08DBP 200552014ND
2019-10-08DBP 200552015ND