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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Valley Center MWD

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.

 

92

Samples

0

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20123.88 ppb12121.99 ppb - 8.09 ppb
20132.87 ppb1613ND - 10.7 ppb
20141.12 ppb167ND - 4.06 ppb
20151.04 ppb1612ND - 2.50 ppb
20161.32 ppb1614ND - 3.70 ppb
20172.13 ppb1612ND - 7.20 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
2012-05-159469-903-10402.43 ppb
2012-05-159469-901-09152.06 ppb
2012-05-159469-902-09452.27 ppb
2012-05-159469-900-10101.99 ppb
2012-08-149469-900-11252.69 ppb
2012-08-149469-903-12502.53 ppb
2012-08-149469-902-11152.24 ppb
2012-08-149469-901-11402.62 ppb
2012-11-139469-903-12006.00 ppb
2012-11-139469-900-10206.38 ppb
2012-11-139469-901-08557.23 ppb
2012-11-139469-902-09408.09 ppb
2013-02-149469-901-100010.7 ppb
2013-02-149469-902-09277.75 ppb
2013-02-149469-903-11007.04 ppb
2013-02-149469-900-10336.71 ppb
2013-05-159469-903-14371.57 ppb
2013-05-159469-900-12151.63 ppb
2013-05-159469-901-12553.41 ppb
2013-05-159469-902-10501.52 ppb
2013-08-139469-902-0905ND
2013-08-139469-900-10051.27 ppb
2013-08-139469-903-10451.24 ppb
2013-08-139469-901-09301.43 ppb
2013-11-139469-902-0925ND
2013-11-139469-901-09550.798 ppb
2013-11-139469-900-10400.852 ppb
2013-11-139469-903-1110ND
2014-02-119469-901-0920ND
2014-02-119469-900-1000ND
2014-02-119469-903-1035ND
2014-02-119469-902-0850ND
2014-05-139469-902-0930ND
2014-05-139469-900-1030ND
2014-05-139469-903-1100ND
2014-05-139469-901-0956ND
2014-08-129469-902-09053.69 ppb
2014-08-129469-900-09353.97 ppb
2014-08-129469-901-08354.06 ppb
2014-08-129469-903-10003.08 ppb
2014-11-129469-900-10100.917 ppb
2014-11-129469-901-09070.736 ppb
2014-11-129469-902-0940ND
2014-11-129469-903-10551.47 ppb
2015-03-034792-902-10281.03 ppb
2015-03-034792-901-11001.29 ppb
2015-03-034792-903-10281.31 ppb
2015-03-034792-900-11351.03 ppb
2015-05-075810-902-08051.20 ppb
2015-05-075810-900-09102.50 ppb
2015-05-075810-901-08401.40 ppb
2015-05-075810-903-10401.70 ppb
2015-08-105810-901-1050ND
2015-08-105810-902-1050ND
2015-08-105810-900-1125ND
2015-08-105810-903-1210ND
2015-11-091677-900-10551.20 ppb
2015-11-095810-901-10201.20 ppb
2015-11-091677-903-12151.30 ppb
2015-11-095810-902-09251.40 ppb
2016-02-179588-901-09301.30 ppb
2016-02-179588-903-10451.40 ppb
2016-02-179588-902-0900ND
2016-02-179588-900-10151.80 ppb
2016-05-113761-901-10301.20 ppb
2016-05-113761-903-09301.10 ppb
2016-05-113761-900-09001.20 ppb
2016-05-113761-902-1000ND
2016-08-083761-903-12301.10 ppb
2016-08-083761-902-09251.000 ppb
2016-08-083761-900-11101.10 ppb
2016-08-083761-901-10151.10 ppb
2016-11-093761-903-10153.70 ppb
2016-11-093761-901-09051.70 ppb
2016-11-093761-902-08371.50 ppb
2016-11-093761-900-09421.90 ppb
2017-02-083761-901-11303.10 ppb
2017-02-083761-900-10202.30 ppb
2017-02-093761-903-09451.60 ppb
2017-02-093761-902-11001.60 ppb
2017-05-023761-900-1050ND
2017-05-023761-902-0940ND
2017-05-023761-903-1125ND
2017-05-023761-901-1006ND
2017-08-093761-901-09402.40 ppb
2017-08-093761-903-10552.10 ppb
2017-08-093761-902-11451.30 ppb
2017-08-093761-900-10252.90 ppb
2017-11-143761-902-08553.60 ppb
2017-11-143761-903-10453.50 ppb
2017-11-143761-901-09207.20 ppb
2017-11-143761-900-10002.50 ppb