Bromoform
Connecticut Water Company - Northern Region-Western 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.
230
Samples
0
Samples exceeding legal limit (MCL)
31
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.105 ppb | 44 | 4 | ND - 1.60 ppb |
| 2015 | 0.162 ppb | 39 | 4 | ND - 2.20 ppb |
| 2016 | 0.294 ppb | 37 | 9 | ND - 2.70 ppb |
| 2017 | 0.206 ppb | 38 | 8 | ND - 1.60 ppb |
| 2018 | 0.0755 ppb | 38 | 3 | ND - 1.30 ppb |
| 2019 | 0.132 ppb | 34 | 5 | ND - 1.50 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 | Lab ID | Result |
|---|---|---|
| 2014-01-24 | BG03077VOC1 | ND |
| 2014-01-29 | BG04659VOC1 | ND |
| 2014-02-04 | 1747THM | ND |
| 2014-02-04 | 1748THM | ND |
| 2014-02-04 | 1749THM | ND |
| 2014-02-04 | 1750THM | 0.900 ppb |
| 2014-02-04 | 1751THM | ND |
| 2014-02-04 | 1752THM | ND |
| 2014-02-04 | 1753THM | ND |
| 2014-02-04 | 1754THM | ND |
| 2014-02-07 | BG08003VOC1 | ND |
| 2014-04-03 | BG27981VOC1 | ND |
| 2014-04-09 | 4561VOC1 | ND |
| 2014-05-06 | 6108THM | ND |
| 2014-05-06 | 6109THM | ND |
| 2014-05-06 | 6110THM | ND |
| 2014-05-06 | 6111THM | ND |
| 2014-05-06 | 6112THM | ND |
| 2014-05-06 | 6113THM | ND |
| 2014-05-06 | 6114THM | 0.700 ppb |
| 2014-05-09 | 6107THM | ND |
| 2014-05-21 | BG47680VOC1 | ND |
| 2014-06-04 | BG53346VOC1 | ND |
| 2014-06-06 | BG54002VOC1 | ND |
| 2014-06-17 | BG60666VOC1 | ND |
| 2014-06-19 | BG62968VOC1 | ND |
| 2014-07-11 | BG73249VOC1 | ND |
| 2014-08-05 | BG88648TTHM | ND |
| 2014-08-05 | BG88649TTHM | ND |
| 2014-08-05 | BG88650TTHM | ND |
| 2014-08-05 | BG88651TTHM | ND |
| 2014-08-05 | BG88652TTHM | ND |
| 2014-08-05 | BG88653TTHM | ND |
| 2014-08-05 | BG88654TTHM | ND |
| 2014-08-05 | BG88655TTHM | 1.40 ppb |
| 2014-11-21 | BH44966VOC1 | ND |
| 2014-11-25 | BH46470TTHM | 1.60 ppb |
| 2014-11-25 | BH46471TTHM | ND |
| 2014-11-25 | BH46472TTHM | ND |
| 2014-11-25 | BH46473TTHM | ND |
| 2014-11-25 | BH46474TTHM | ND |
| 2014-11-25 | BH46475TTHM | ND |
| 2014-11-25 | BH46476TTHM | ND |
| 2014-11-25 | BH46477TTHM | ND |
| 2015-01-20 | BH64902VOC1 | ND |
| 2015-02-25 | BH77225TTHM | ND |
| 2015-02-25 | BH77220TTHM | ND |
| 2015-02-25 | BH77223TTHM | ND |
| 2015-02-25 | BH77224TTHM | ND |
| 2015-02-25 | BH77221TTHM | ND |
| 2015-02-25 | BH77226TTHM | ND |
| 2015-02-25 | BH77222TTHM | ND |
| 2015-02-25 | BH77219TTHM | 1.10 ppb |
| 2015-03-06 | BH80296VOC1 | ND |
| 2015-04-29 | BJ09906VOC1 | ND |
| 2015-04-30 | BJ10443VOC1 | ND |
| 2015-05-21 | BJ20484TTHM | ND |
| 2015-05-21 | BJ20486TTHM | ND |
| 2015-05-21 | BJ20485TTHM | ND |
| 2015-05-21 | BJ20487TTHM | ND |
| 2015-05-21 | BJ20488TTHM | ND |
| 2015-05-21 | BJ20482TTHM | ND |
| 2015-05-21 | BJ20481TTHM | 1.10 ppb |
| 2015-05-21 | BJ20483TTHM | ND |
| 2015-07-01 | BJ40227VOC1 | ND |
| 2015-07-02 | BJ41078VOC1 | ND |
| 2015-07-30 | BJ65812VOC1 | ND |
| 2015-08-20 | BJ78786TTHM | ND |
| 2015-08-20 | BJ78788TTHM | ND |
| 2015-08-20 | BJ78784TTHM | ND |
| 2015-08-20 | BJ78785TTHM | ND |
| 2015-08-20 | BJ78782TTHM | ND |
| 2015-08-20 | BJ78787TTHM | ND |
| 2015-08-20 | BJ78781TTHM | 2.20 ppb |
| 2015-08-20 | BJ78783TTHM | ND |
| 2015-11-24 | BK27972TTHM | ND |
| 2015-11-24 | BK27967TTHM | ND |
| 2015-11-24 | BK27971TTHM | ND |
| 2015-11-24 | BK27969TTHM | ND |
| 2015-11-24 | BK27968TTHM | ND |
| 2015-11-24 | BK27966TTHM | 1.90 ppb |
| 2015-11-24 | BK27970TTHM | ND |
| 2015-11-24 | BK27973TTHM | ND |
| 2016-01-12 | BK51386VOC1 | ND |
| 2016-01-15 | BK53768VOC1 | ND |
| 2016-02-04 | BK61857TTHM | 1.60 ppb |
| 2016-02-04 | BK61858TTHM | ND |
| 2016-02-04 | BK61859TTHM | ND |
| 2016-02-04 | BK61860TTHM | ND |
| 2016-02-04 | BK61861TTHM | ND |
| 2016-02-04 | BK61862TTHM | ND |
| 2016-02-04 | BK61863TTHM | ND |
| 2016-02-04 | BK61864TTHM | ND |
| 2016-05-05 | BN26300TTHM | 1.40 ppb |
| 2016-05-05 | BN26301TTHM | ND |
| 2016-05-05 | BN26302TTHM | ND |
| 2016-05-05 | BN26303TTHM | ND |
| 2016-05-05 | BN26304TTHM | ND |
| 2016-05-05 | BN26305TTHM | ND |
| 2016-05-05 | BN26306TTHM | ND |
| 2016-05-05 | BN26307TTHM | ND |
| 2016-05-25 | BN40000VOC1 | ND |
| 2016-06-09 | BN51878VOC1 | ND |
| 2016-07-15 | BN73865VOC1 | ND |
| 2016-08-18 | BN94948TTHM | 1.80 ppb |
| 2016-08-18 | BN94949TTHM | ND |
| 2016-08-18 | BN94950TTHM | 1.10 ppb |
| 2016-08-18 | BN94951TTHM | ND |
| 2016-08-18 | BN94952TTHM | 0.510 ppb |
| 2016-08-18 | BN94953TTHM | 0.540 ppb |
| 2016-08-18 | BN94954TTHM | ND |
| 2016-08-18 | BN94955TTHM | ND |
| 2016-11-03 | BV75338TTHM | 2.70 ppb |
| 2016-11-03 | BV75339TTHM | ND |
| 2016-11-03 | BV75340TTHM | 0.700 ppb |
| 2016-11-03 | BV75341TTHM | ND |
| 2016-11-03 | BV75342TTHM | ND |
| 2016-11-03 | BV75343TTHM | 0.510 ppb |
| 2016-11-03 | BV75344TTHM | ND |
| 2016-11-03 | BV75345TTHM | ND |
| 2017-02-02 | BX44867TTHM | 1.30 ppb |
| 2017-02-02 | BX44868TTHM | ND |
| 2017-02-02 | BX44869TTHM | ND |
| 2017-02-02 | BX44870TTHM | ND |
| 2017-02-02 | BX44871TTHM | ND |
| 2017-02-02 | BX44872TTHM | ND |
| 2017-02-02 | BX44873TTHM | ND |
| 2017-02-02 | BX44874TTHM | ND |
| 2017-02-08 | BX57435VOC1 | ND |
| 2017-03-03 | BX79851VOC1 | ND |
| 2017-03-03 | BX79849VOC1 | ND |
| 2017-04-21 | BY07962VOC1 | ND |
| 2017-05-04 | BY15439TTHM | 1.60 ppb |
| 2017-05-04 | BY15440TTHM | ND |
| 2017-05-04 | BY15441TTHM | ND |
| 2017-05-04 | BY15442TTHM | ND |
| 2017-05-04 | BY15443TTHM | ND |
| 2017-05-04 | BY15444TTHM | ND |
| 2017-05-04 | BY15445TTHM | ND |
| 2017-05-04 | BY15446TTHM | ND |
| 2017-06-01 | BY32099VOC1 | ND |
| 2017-07-07 | BY54441VOC1 | ND |
| 2017-08-07 | BY79801TTHM | 1.40 ppb |
| 2017-08-07 | BY79802TTHM | 0.550 ppb |
| 2017-08-07 | BY79803TTHM | 1.000 ppb |
| 2017-08-07 | BY79804TTHM | ND |
| 2017-08-07 | BY79805TTHM | 0.620 ppb |
| 2017-08-07 | BY79806TTHM | 0.500 ppb |
| 2017-08-07 | BY79807TTHM | ND |
| 2017-08-07 | BY79808TTHM | ND |
| 2017-11-06 | BZ33918TTHM | ND |
| 2017-11-16 | BZ43465TTHM | 0.840 ppb |
| 2017-11-16 | BZ43466TTHM | ND |
| 2017-11-16 | BZ43467TTHM | ND |
| 2017-11-16 | BZ43468TTHM | ND |
| 2017-11-16 | BZ43469TTHM | ND |
| 2017-11-16 | BZ43470TTHM | ND |
| 2017-11-16 | BZ43471TTHM | ND |
| 2018-01-23 | BZ78888VOC1 | ND |
| 2018-01-31 | BZ82950VOC1 | ND |
| 2018-02-01 | BZ83504TTHM | ND |
| 2018-02-01 | BZ83505TTHM | ND |
| 2018-02-01 | BZ83506TTHM | ND |
| 2018-02-01 | BZ83507TTHM | ND |
| 2018-02-01 | BZ83508TTHM | ND |
| 2018-02-01 | BZ83509TTHM | ND |
| 2018-02-01 | BZ83510TTHM | ND |
| 2018-02-21 | BZ93283TTHM | ND |
| 2018-05-03 | CA41161TTHM | ND |
| 2018-05-03 | CA41162TTHM | ND |
| 2018-05-03 | CA41163TTHM | ND |
| 2018-05-03 | CA41164TTHM | ND |
| 2018-05-03 | CA41165TTHM | ND |
| 2018-05-03 | CA41166TTHM | ND |
| 2018-05-03 | CA41167TTHM | ND |
| 2018-05-03 | D8E0468-01VOC | ND |
| 2018-05-15 | CA48118TTHM | ND |
| 2018-07-13 | CA89901 | ND |
| 2018-08-02 | CB04020 | 0.900 ppb |
| 2018-08-02 | CB04021 | ND |
| 2018-08-02 | CB04022 | 0.670 ppb |
| 2018-08-02 | CB04023 | ND |
| 2018-08-02 | CB04024 | ND |
| 2018-08-02 | CB04025 | ND |
| 2018-08-02 | CB04026 | ND |
| 2018-08-06 | CB05840 | ND |
| 2018-08-10 | DBP 200502031 | ND |
| 2018-08-10 | CB09154 | ND |
| 2018-11-01 | DBP 200511133 | 1.30 ppb |
| 2018-11-01 | DBP 200511134 | ND |
| 2018-11-01 | DBP 200511135 | ND |
| 2018-11-01 | DBP 200511136 | ND |
| 2018-11-01 | DBP 200511137 | ND |
| 2018-11-01 | DBP 200511138 | ND |
| 2018-11-01 | DBP 200511139 | ND |
| 2018-11-05 | DBP 200511389 | ND |
| 2019-01-02 | VOC1 200517309 | ND |
| 2019-02-07 | DBP 200521083 | ND |
| 2019-02-07 | DBP 200521084 | ND |
| 2019-02-07 | DBP 200521085 | ND |
| 2019-02-07 | DBP 200521086 | ND |
| 2019-02-07 | DBP 200521087 | ND |
| 2019-02-07 | DBP 200521088 | ND |
| 2019-02-07 | DBP 200521089 | 1.10 ppb |
| 2019-02-11 | DBP 200521256 | ND |
| 2019-03-15 | VOC1 200524883 | ND |
| 2019-05-09 | DBP 200531575 | 0.700 ppb |
| 2019-05-09 | DBP 200531576 | ND |
| 2019-05-09 | DBP 200531577 | ND |
| 2019-05-09 | DBP 200531582 | ND |
| 2019-05-09 | DBP 200531584 | ND |
| 2019-05-09 | DBP 200531586 | ND |
| 2019-05-09 | DBP 200531587 | ND |
| 2019-05-13 | DBP 200531837 | ND |
| 2019-08-01 | DBP 200542722 | 1.50 ppb |
| 2019-08-01 | DBP 200542723 | ND |
| 2019-08-01 | DBP 200542724 | 0.700 ppb |
| 2019-08-01 | DBP 200542725 | ND |
| 2019-08-01 | DBP 200542726 | ND |
| 2019-08-01 | DBP 200542727 | ND |
| 2019-08-01 | DBP 200542728 | ND |
| 2019-08-13 | DBP 200544758 | ND |
| 2019-11-07 | DBP 200555828 | 0.500 ppb |
| 2019-11-07 | DBP 200555830 | ND |
| 2019-11-07 | DBP 200555831 | ND |
| 2019-11-07 | DBP 200555832 | ND |
| 2019-11-07 | DBP 200555833 | ND |
| 2019-11-07 | DBP 200555834 | ND |
| 2019-11-07 | DBP 200555835 | ND |
| 2019-11-18 | DBP 200557004 | ND |