Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromodichloromethane

Hillview Water Co-raymond

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

 

21

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.90 ppb112.90 ppb
20152.03 ppb32ND - 3.30 ppb
2016ND10ND
2017ND20ND
20181.04 ppb102ND - 7.80 ppb
2019ND40ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-06-305810-900-11182.90 ppb
2015-06-175810-900-12003.30 ppb
2015-07-285810-019-12202.80 ppb
2015-12-145810-019-0947ND
2016-10-185810-019-1207ND
2017-01-165810-019-1200ND
2017-04-115810-019-1114ND
2018-03-065810-016-0806ND
2018-06-125810-900-14107.80 ppb
2018-08-015810-018-10402.60 ppb
2018-08-015810-020-1020ND
2018-08-285810-018-1310ND
2018-09-195810-004-0845ND
2018-09-195810-010-0821ND
2018-09-195810-006-0914ND
2018-10-115810-020-1338ND
2018-10-125810-018-1400ND
2019-01-105810-018-1020ND
2019-01-105810-020-0955ND
2019-04-235810-018-1500ND
2019-04-235810-020-1445ND