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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Parker WSD

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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

 

125

Samples

0

Samples exceeding legal limit (MCL)

113

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND20ND
20159.15 ppb881.40 ppb - 19.0 ppb
20168.34 ppb16161.10 ppb - 17.0 ppb
20173.81 ppb35350.500 ppb - 12.0 ppb
20185.03 ppb3229ND - 11.0 ppb
20193.85 ppb3225ND - 9.20 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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 Result
2014-07-21ND
2014-07-24ND
2015-08-193.80 ppb
2015-08-191.40 ppb
2015-08-191.80 ppb
2015-08-197.20 ppb
2015-11-1811.0 ppb
2015-11-1814.0 ppb
2015-11-1819.0 ppb
2015-11-1815.0 ppb
2016-02-181.10 ppb
2016-02-181.60 ppb
2016-02-187.40 ppb
2016-02-1811.0 ppb
2016-05-1612.0 ppb
2016-05-1616.0 ppb
2016-05-165.20 ppb
2016-05-1616.0 ppb
2016-08-156.20 ppb
2016-08-155.10 ppb
2016-08-154.80 ppb
2016-08-153.30 ppb
2016-11-1411.0 ppb
2016-11-1417.0 ppb
2016-11-1414.0 ppb
2016-11-141.80 ppb
2017-02-275.80 ppb
2017-02-275.80 ppb
2017-02-274.50 ppb
2017-02-275.10 ppb
2017-02-272.60 ppb
2017-02-272.70 ppb
2017-02-274.60 ppb
2017-02-275.70 ppb
2017-05-111.20 ppb
2017-05-111.60 ppb
2017-05-111.30 ppb
2017-05-111.20 ppb
2017-05-111.20 ppb
2017-05-111.10 ppb
2017-05-111.60 ppb
2017-05-111.60 ppb
2017-05-310.800 ppb
2017-05-312.30 ppb
2017-05-311.10 ppb
2017-08-164.50 ppb
2017-08-164.20 ppb
2017-08-1612.0 ppb
2017-08-162.50 ppb
2017-08-163.80 ppb
2017-08-162.60 ppb
2017-08-164.40 ppb
2017-08-165.40 ppb
2017-11-0812.0 ppb
2017-11-081.20 ppb
2017-11-080.500 ppb
2017-11-082.20 ppb
2017-11-088.50 ppb
2017-11-082.20 ppb
2017-11-086.80 ppb
2017-11-088.80 ppb
2018-02-089.20 ppb
2018-02-087.90 ppb
2018-02-089.40 ppb
2018-02-089.50 ppb
2018-02-088.10 ppb
2018-02-087.40 ppb
2018-02-0811.0 ppb
2018-02-089.60 ppb
2018-05-093.40 ppb
2018-05-093.50 ppb
2018-05-096.00 ppb
2018-05-094.80 ppb
2018-05-093.00 ppb
2018-05-092.70 ppb
2018-05-093.40 ppb
2018-05-093.80 ppb
2018-08-07ND
2018-08-07ND
2018-08-070.800 ppb
2018-08-070.600 ppb
2018-08-073.80 ppb
2018-08-074.00 ppb
2018-08-073.40 ppb
2018-08-07ND
2018-11-276.90 ppb
2018-11-276.20 ppb
2018-11-274.80 ppb
2018-11-273.00 ppb
2018-11-275.00 ppb
2018-11-277.40 ppb
2018-11-277.20 ppb
2018-11-275.10 ppb
2019-03-258.40 ppb
2019-03-258.30 ppb
2019-03-254.70 ppb
2019-03-257.40 ppb
2019-03-259.20 ppb
2019-03-257.70 ppb
2019-03-258.50 ppb
2019-03-256.90 ppb
2019-05-073.90 ppb
2019-05-07ND
2019-05-071.40 ppb
2019-05-072.20 ppb
2019-05-075.90 ppb
2019-05-076.10 ppb
2019-05-074.40 ppb
2019-05-072.70 ppb
2019-08-061.50 ppb
2019-08-062.90 ppb
2019-08-062.00 ppb
2019-08-065.60 ppb
2019-08-065.50 ppb
2019-08-060.800 ppb
2019-08-304.50 ppb
2019-08-307.30 ppb
2019-11-04ND
2019-11-04ND
2019-11-04ND
2019-11-04ND
2019-11-044.00 ppb
2019-11-041.50 ppb
2019-11-04ND
2019-11-04ND