Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Lake Monticello

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

 

64

Samples

0

Samples exceeding legal limit (MCL)

40

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
20150.618 ppb440.500 ppb - 0.770 ppb
20161.15 ppb1615ND - 2.95 ppb
20171.22 ppb16160.410 ppb - 3.18 ppb
2018ND120ND
20190.636 ppb165ND - 3.10 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
2015-02-2300281-REI CONSUL0.660 ppb
2015-02-2300281-REI CONSUL0.540 ppb
2015-02-2300281-REI CONSUL0.500 ppb
2015-02-2300281-REI CONSUL0.770 ppb
2016-02-091602C26-04AND
2016-02-091602C26-01A0.550 ppb
2016-02-091602C26-02A0.250 ppb
2016-02-091602C26-03A0.360 ppb
2016-05-1616052018-03A0.600 ppb
2016-05-1616052018-01A0.630 ppb
2016-05-1616052018-04A0.460 ppb
2016-05-1616052018-02A0.430 ppb
2016-08-0816081239-04A1.99 ppb
2016-08-0816081239-02A2.00 ppb
2016-08-0816081239-03A2.76 ppb
2016-08-0816081239-01A2.95 ppb
2016-11-0816111067-01A1.75 ppb
2016-11-0816111067-03A1.56 ppb
2016-11-0816111067-04A1.05 ppb
2016-11-0816111067-02A0.980 ppb
2017-02-1417021979-04A0.450 ppb
2017-02-1417021979-03A0.570 ppb
2017-02-1417021979-01A0.570 ppb
2017-02-1417021979-02A0.410 ppb
2017-05-0917051227-04A0.750 ppb
2017-05-0917051227-03A0.880 ppb
2017-05-0917051227-01A0.890 ppb
2017-05-0917051227-02A0.600 ppb
2017-08-0817081311-02A1.84 ppb
2017-08-0817081311-04A2.21 ppb
2017-08-0817081311-03A2.64 ppb
2017-08-0817081311-01A3.18 ppb
2017-11-1417112124-04A0.860 ppb
2017-11-1417112124-02A0.490 ppb
2017-11-1417112124-03A1.17 ppb
2017-11-1417112124-01A2.01 ppb
2018-02-2718C0028-04-1ND
2018-02-2718C0028-03-1ND
2018-02-2718C0028-02-1ND
2018-02-2718C0028-01-1ND
2018-05-1518E0642-04-1ND
2018-05-1518E0642-01-1ND
2018-05-1518E0642-02-1ND
2018-05-1518E0642-03-1ND
2018-11-1318K0622-01ND
2018-11-1318K0622-03ND
2018-11-1318K0622-05ND
2018-11-1318K0622-07ND
2019-02-1119B0457-01ND
2019-02-1119B0457-03ND
2019-02-1119B0457-05ND
2019-02-1119B0457-07ND
2019-05-0619E0319-01-1ND
2019-05-0619E0319-02-1ND
2019-05-0619E0319-03-1ND
2019-05-0619E0319-04-1ND
2019-08-1319H0507-031.45 ppb
2019-08-1319H0507-071.81 ppb
2019-08-1319H0507-052.48 ppb
2019-08-1319H0507-013.10 ppb
2019-11-1919K0852-04-1ND
2019-11-1919K0852-03-1ND
2019-11-1919K0852-02-1ND
2019-11-1919K0852-01-11.33 ppb