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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Rincon Del Diablo MWD(ID-1)

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.

 

81

Samples

0

Samples exceeding legal limit (MCL)

81

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20123.61 ppb12121.90 ppb - 6.50 ppb
20132.34 ppb16160.670 ppb - 6.80 ppb
20142.98 ppb10100.730 ppb - 7.70 ppb
20151.63 ppb18181.10 ppb - 2.70 ppb
20161.30 ppb13130.910 ppb - 1.60 ppb
20172.09 ppb12120.680 ppb - 3.60 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
2012-05-033761-901-09362.80 ppb
2012-05-033761-903-09233.00 ppb
2012-05-033761-902-08392.90 ppb
2012-05-033761-900-09073.00 ppb
2012-08-223761-900-10222.10 ppb
2012-08-223761-901-11181.90 ppb
2012-08-223761-903-11042.10 ppb
2012-08-223761-902-09302.00 ppb
2012-11-073761-901-09375.50 ppb
2012-11-073761-902-08006.50 ppb
2012-11-073761-900-09005.60 ppb
2012-11-073761-903-09305.90 ppb
2013-02-133761-901-09525.90 ppb
2013-02-133761-903-12006.10 ppb
2013-02-133761-902-13295.80 ppb
2013-02-133761-900-12336.80 ppb
2013-05-144790-900-11350.960 ppb
2013-05-144790-902-12381.10 ppb
2013-05-144790-901-11001.10 ppb
2013-05-144790-903-10531.000 ppb
2013-08-064790-900-08561.70 ppb
2013-08-064790-901-09341.60 ppb
2013-08-064790-903-09201.30 ppb
2013-08-064790-902-08231.30 ppb
2013-11-054790-903-10000.730 ppb
2013-11-054790-900-10200.690 ppb
2013-11-054790-901-09400.670 ppb
2013-11-054790-902-11000.710 ppb
2014-02-114790-903-10120.730 ppb
2014-02-114790-900-09070.760 ppb
2014-02-114790-902-08110.750 ppb
2014-02-114790-901-09470.770 ppb
2014-08-054790-902-07403.10 ppb
2014-08-054790-903-09303.00 ppb
2014-08-054790-901-08107.20 ppb
2014-08-054790-900-08337.70 ppb
2014-08-054790-900-08483.00 ppb
2014-08-054790-901-09452.80 ppb
2015-02-034790-900-11131.40 ppb
2015-02-034790-902-08201.40 ppb
2015-02-034790-901-10071.30 ppb
2015-02-034790-903-10231.50 ppb
2015-05-124790-901-10301.90 ppb
2015-05-124790-902-08351.80 ppb
2015-05-124790-900-09302.00 ppb
2015-05-124790-903-10152.00 ppb
2015-08-044790-900-11501.60 ppb
2015-08-044790-902-12251.60 ppb
2015-08-044790-901-11281.60 ppb
2015-08-044790-903-11141.50 ppb
2015-11-034790-903-09451.10 ppb
2015-11-034790-900-11152.40 ppb
2015-11-034790-901-10001.10 ppb
2015-11-034790-902-08151.10 ppb
2015-11-034790-900-09101.40 ppb
2015-11-034790-901-10402.70 ppb
2016-02-024790-900-09281.20 ppb
2016-05-034790-900-11001.000 ppb
2016-05-034790-901-09310.910 ppb
2016-05-034790-902-11350.960 ppb
2016-05-034790-903-09171.000 ppb
2016-08-024790-903-11131.30 ppb
2016-08-024790-900-10081.40 ppb
2016-08-024790-902-09081.50 ppb
2016-08-024790-901-10531.30 ppb
2016-11-014790-902-08401.60 ppb
2016-11-014790-901-10251.60 ppb
2016-11-014790-900-09301.60 ppb
2016-11-014790-903-09251.50 ppb
2017-05-024790-901-09311.10 ppb
2017-05-024790-902-10500.680 ppb
2017-05-024790-900-10160.950 ppb
2017-05-024790-903-09551.000 ppb
2017-08-084790-903-10201.80 ppb
2017-08-084790-901-10362.00 ppb
2017-08-084790-900-09382.30 ppb
2017-08-084790-902-09022.50 ppb
2017-11-074790-902-11203.20 ppb
2017-11-074790-903-09103.60 ppb
2017-11-074790-901-08552.70 ppb
2017-11-074790-900-09503.20 ppb