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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Green Valley SUD

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

 

110

Samples

0

Samples exceeding legal limit (MCL)

83

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.46 ppb167ND - 7.20 ppb
20152.75 ppb1910ND - 20.3 ppb
20162.82 ppb2015ND - 10.7 ppb
20172.79 ppb1817ND - 12.9 ppb
20183.33 ppb1917ND - 11.2 ppb
20194.22 ppb1817ND - 11.5 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 Lab ID Result
2014-02-19AC435534.10 ppb
2014-02-19AC435591.10 ppb
2014-02-19AC435871.10 ppb
2014-02-19AC43551ND
2014-04-03AC492064.20 ppb
2014-04-03AC49207ND
2014-04-03AC49204ND
2014-04-03AC49227ND
2014-07-14AC59615ND
2014-07-14AC59589ND
2014-07-14AC59608ND
2014-09-18AC674877.20 ppb
2014-11-11AC717224.60 ppb
2014-11-11AC717251.000 ppb
2014-11-11AC71728ND
2014-11-11AC71727ND
2015-01-27AC779025.10 ppb
2015-01-27AC77917ND
2015-01-27AC77881ND
2015-01-27AC77880ND
2015-04-15AC884081.30 ppb
2015-04-15AC88396ND
2015-04-15AC883506.30 ppb
2015-04-15AC883511.30 ppb
2015-04-15AC88348ND
2015-04-15AC88352ND
2015-07-22AD006422.30 ppb
2015-07-22AD006135.90 ppb
2015-07-22AD006096.70 ppb
2015-07-22AD00567ND
2015-07-22AD00612ND
2015-11-20AD1441220.3 ppb
2015-11-20AD143701.90 ppb
2015-11-20AD143691.20 ppb
2015-11-20AD14377ND
2016-01-20AD18974ND
2016-01-20AD1887610.1 ppb
2016-01-20AD188863.10 ppb
2016-01-20AD188882.30 ppb
2016-01-20AD188952.20 ppb
2016-04-06AD320771.20 ppb
2016-04-06AD3201010.7 ppb
2016-04-06AD320144.00 ppb
2016-04-06AD320432.40 ppb
2016-04-06AD320122.60 ppb
2016-06-07AD396322.70 ppb
2016-09-16AD500397.00 ppb
2016-09-16AD500571.60 ppb
2016-09-16AD50015ND
2016-09-16AD50012ND
2016-09-16AD501532.40 ppb
2016-11-03AD564402.90 ppb
2016-11-03AD564411.20 ppb
2016-11-03AD56438ND
2016-11-03AD56439ND
2017-01-30AD675811.10 ppb
2017-01-30AD674813.40 ppb
2017-01-30AD675121.10 ppb
2017-01-30AD67479ND
2017-01-30AD675131.10 ppb
2017-04-20AD803901.10 ppb
2017-04-20AD803404.50 ppb
2017-04-20AD803411.70 ppb
2017-04-20AD803381.20 ppb
2017-04-20AD803441.30 ppb
2017-08-16AD9338412.9 ppb
2017-08-16AD933752.50 ppb
2017-08-16AD933731.90 ppb
2017-08-16AD933741.80 ppb
2017-12-08AE074047.50 ppb
2017-12-08AE074032.70 ppb
2017-12-08AE074022.30 ppb
2017-12-08AE074012.20 ppb
2018-01-26AE110221.50 ppb
2018-01-26AE109523.60 ppb
2018-01-26AE109513.70 ppb
2018-01-26AE109503.30 ppb
2018-01-26AE109533.10 ppb
2018-04-18AE230161.000 ppb
2018-04-18AE23018ND
2018-04-18AE229886.00 ppb
2018-04-18AE229913.40 ppb
2018-04-18AE229922.70 ppb
2018-04-18AE229903.50 ppb
2018-08-16AE373535.10 ppb
2018-08-16AE373524.00 ppb
2018-08-16AE373512.10 ppb
2018-08-16AE373542.70 ppb
2018-10-03AE4251311.2 ppb
2018-10-03AE42527ND
2018-10-03AE425453.20 ppb
2018-10-03AE425203.20 ppb
2019-02-05AE529551.80 ppb
2019-02-05AE52927ND
2019-02-05AE5285311.5 ppb
2019-02-05AE528553.70 ppb
2019-02-05AE528703.00 ppb
2019-02-05AE528763.10 ppb
2019-04-11AE619987.10 ppb
2019-04-11AE620234.40 ppb
2019-04-11AE619954.70 ppb
2019-04-11AE620054.70 ppb
2019-08-01AE767616.20 ppb
2019-08-01AE767624.30 ppb
2019-08-01AE767632.60 ppb
2019-08-01AE767652.60 ppb
2019-10-15AE866156.80 ppb
2019-10-15AE866164.40 ppb
2019-10-15AE866142.50 ppb
2019-10-15AE866182.60 ppb