Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromodichloromethane

City of Watsonville

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

 

221

Samples

0

Samples exceeding legal limit (MCL)

175

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.10 ppb4728ND - 3.20 ppb
20151.92 ppb3227ND - 4.00 ppb
20164.70 ppb3230ND - 23.0 ppb
20176.25 ppb4629ND - 25.0 ppb
20188.60 ppb32321.000 ppb - 25.0 ppb
20197.85 ppb3229ND - 21.0 ppb

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
2014-02-199590-009-1430ND
2014-02-199590-801-13102.40 ppb
2014-02-199590-802-10301.20 ppb
2014-02-199590-803-09451.60 ppb
2014-02-199590-804-11451.80 ppb
2014-02-199590-805-08501.10 ppb
2014-02-199590-806-13451.10 ppb
2014-02-199590-807-1125ND
2014-02-199590-808-0915ND
2014-03-199590-004-0800ND
2014-03-199590-005-0745ND
2014-03-199590-006-0800ND
2014-03-199590-007-0840ND
2014-03-199590-009-1100ND
2014-03-199590-010-0915ND
2014-03-199590-011-1000ND
2014-03-199590-012-0920ND
2014-03-199590-013-0835ND
2014-03-199590-014-0740ND
2014-03-199590-015-0805ND
2014-03-199590-016-0900ND
2014-03-199590-029-0845ND
2014-03-199590-030-0900ND
2014-05-219590-801-10002.40 ppb
2014-05-219590-802-09152.40 ppb
2014-05-219590-803-08451.90 ppb
2014-05-219590-804-09451.40 ppb
2014-05-219590-805-08092.30 ppb
2014-05-219590-806-10202.50 ppb
2014-05-219590-807-09301.50 ppb
2014-05-219590-808-08281.40 ppb
2014-08-139590-801-11102.10 ppb
2014-08-139590-802-09501.40 ppb
2014-08-139590-803-09201.60 ppb
2014-08-139590-804-10402.30 ppb
2014-08-139590-805-08151.80 ppb
2014-08-139590-806-11451.80 ppb
2014-08-139590-807-10203.20 ppb
2014-08-139590-808-08451.40 ppb
2014-11-129590-801-11451.80 ppb
2014-11-129590-802-10002.60 ppb
2014-11-129590-803-09401.90 ppb
2014-11-129590-804-1045ND
2014-11-129590-805-09001.30 ppb
2014-11-129590-806-12152.10 ppb
2014-11-129590-807-1025ND
2014-11-129590-808-09201.20 ppb
2015-02-099590-801-11503.60 ppb
2015-02-099590-802-10352.30 ppb
2015-02-099590-803-10101.80 ppb
2015-02-099590-804-11202.60 ppb
2015-02-099590-805-0920ND
2015-02-099590-806-12101.90 ppb
2015-02-099590-807-11003.00 ppb
2015-02-099590-808-0945ND
2015-05-139590-801-11102.30 ppb
2015-05-139590-802-10003.00 ppb
2015-05-139590-803-09301.60 ppb
2015-05-139590-804-10203.00 ppb
2015-05-139590-805-08301.30 ppb
2015-05-139590-806-11352.40 ppb
2015-05-139590-807-10503.00 ppb
2015-05-139590-808-09001.30 ppb
2015-08-129590-801-11301.30 ppb
2015-08-129590-802-10151.80 ppb
2015-08-129590-803-09453.10 ppb
2015-08-129590-804-11001.40 ppb
2015-08-129590-805-08551.40 ppb
2015-08-129590-806-13003.00 ppb
2015-08-129590-807-1040ND
2015-08-129590-808-09301.20 ppb
2015-11-099590-801-12504.00 ppb
2015-11-099590-802-11303.20 ppb
2015-11-099590-803-11002.20 ppb
2015-11-099590-804-1230ND
2015-11-099590-805-1005ND
2015-11-099590-806-13102.10 ppb
2015-11-099590-807-12002.20 ppb
2015-11-099590-808-10351.40 ppb
2016-02-109590-801-11501.80 ppb
2016-02-109590-802-10452.90 ppb
2016-02-109590-803-10101.70 ppb
2016-02-109590-804-11302.60 ppb
2016-02-109590-805-09001.10 ppb
2016-02-109590-806-1215ND
2016-02-109590-807-11102.80 ppb
2016-02-109590-808-0930ND
2016-05-239590-801-11301.80 ppb
2016-05-239590-802-10302.90 ppb
2016-05-239590-803-09303.00 ppb
2016-05-239590-804-11051.80 ppb
2016-05-239590-805-08452.20 ppb
2016-05-239590-806-11552.40 ppb
2016-05-239590-807-10501.90 ppb
2016-05-239590-808-09051.50 ppb
2016-08-179590-801-13003.80 ppb
2016-08-179590-802-113023.0 ppb
2016-08-179590-803-103013.0 ppb
2016-08-179590-804-133020.0 ppb
2016-08-179590-805-09151.60 ppb
2016-08-179590-806-135015.0 ppb
2016-08-179590-807-123020.0 ppb
2016-08-179590-808-10004.40 ppb
2016-11-099590-801-12304.30 ppb
2016-11-099590-802-10153.70 ppb
2016-11-099590-803-09502.60 ppb
2016-11-099590-804-12002.40 ppb
2016-11-099590-805-09051.20 ppb
2016-11-099590-806-12502.40 ppb
2016-11-099590-807-10501.40 ppb
2016-11-099590-808-09301.10 ppb
2017-02-279590-801-12152.30 ppb
2017-02-279590-802-10152.90 ppb
2017-02-279590-803-09451.80 ppb
2017-02-279590-804-11152.40 ppb
2017-02-279590-805-0845ND
2017-02-279590-806-12351.10 ppb
2017-02-279590-807-10452.60 ppb
2017-02-279590-808-0915ND
2017-03-159590-004-1040ND
2017-03-159590-005-0905ND
2017-03-159590-006-0910ND
2017-03-159590-007-1100ND
2017-03-159590-009-1030ND
2017-03-159590-010-0955ND
2017-03-159590-011-1010ND
2017-03-159590-012-0935ND
2017-03-159590-013-0945ND
2017-03-159590-014-0825ND
2017-03-159590-015-1010ND
2017-03-159590-016-0840ND
2017-03-159590-029-0830ND
2017-03-159590-030-1100ND
2017-05-319590-801-11301.000 ppb
2017-05-319590-802-10252.30 ppb
2017-05-319590-803-10002.40 ppb
2017-05-319590-804-11101.50 ppb
2017-05-319590-805-0900ND
2017-05-319590-806-11502.90 ppb
2017-05-319590-807-10501.50 ppb
2017-05-319590-808-09351.90 ppb
2017-08-169590-801-125517.0 ppb
2017-08-169590-802-115015.0 ppb
2017-08-169590-803-104020.0 ppb
2017-08-169590-804-122021.0 ppb
2017-08-169590-805-09501.40 ppb
2017-08-169590-806-133025.0 ppb
2017-08-169590-807-124021.0 ppb
2017-08-169590-808-102010.00 ppb
2017-11-149590-801-120016.0 ppb
2017-11-149590-802-103521.0 ppb
2017-11-149590-803-101019.0 ppb
2017-11-149590-804-111021.0 ppb
2017-11-149590-805-09201.30 ppb
2017-11-149590-806-123019.0 ppb
2017-11-149590-807-113021.0 ppb
2017-11-149590-808-095012.0 ppb
2018-02-149590-801-13002.00 ppb
2018-02-149590-802-12002.40 ppb
2018-02-149590-803-11402.00 ppb
2018-02-149590-804-12402.30 ppb
2018-02-149590-805-11001.10 ppb
2018-02-149590-806-13151.80 ppb
2018-02-149590-807-12202.50 ppb
2018-02-149590-808-11202.20 ppb
2018-05-099590-801-14102.00 ppb
2018-05-099590-802-13102.10 ppb
2018-05-099590-803-12402.00 ppb
2018-05-099590-804-13501.50 ppb
2018-05-099590-805-12001.20 ppb
2018-05-099590-806-14402.20 ppb
2018-05-099590-807-13301.30 ppb
2018-05-099590-808-12201.20 ppb
2018-08-229590-801-101019.0 ppb
2018-08-229590-802-104022.0 ppb
2018-08-229590-803-111022.0 ppb
2018-08-229590-804-092022.0 ppb
2018-08-229590-805-12001.80 ppb
2018-08-229590-806-083025.0 ppb
2018-08-229590-807-094522.0 ppb
2018-08-229590-808-11304.20 ppb
2018-11-139590-801-121016.0 ppb
2018-11-139590-802-104518.0 ppb
2018-11-139590-803-101516.0 ppb
2018-11-139590-804-110017.0 ppb
2018-11-139590-805-09301.000 ppb
2018-11-139590-806-123015.0 ppb
2018-11-139590-807-113018.0 ppb
2018-11-139590-808-10006.40 ppb
2019-02-209590-801-11001.30 ppb
2019-02-209590-802-09552.10 ppb
2019-02-209590-803-09352.10 ppb
2019-02-209590-804-10402.00 ppb
2019-02-209590-805-0825ND
2019-02-209590-806-11251.10 ppb
2019-02-209590-807-10202.30 ppb
2019-02-209590-808-0915ND
2019-05-089590-801-1000ND
2019-05-089590-802-09001.80 ppb
2019-05-089590-803-08452.00 ppb
2019-05-089590-804-09401.90 ppb
2019-05-089590-805-08001.000 ppb
2019-05-089590-806-10301.30 ppb
2019-05-089590-807-09202.30 ppb
2019-05-089590-808-08201.10 ppb
2019-08-149590-801-123014.0 ppb
2019-08-149590-802-111017.0 ppb
2019-08-149590-803-104021.0 ppb
2019-08-149590-804-121020.0 ppb
2019-08-149590-805-09451.10 ppb
2019-08-149590-806-125018.0 ppb
2019-08-149590-807-115020.0 ppb
2019-08-149590-808-10102.80 ppb
2019-11-139590-801-103018.0 ppb
2019-11-139590-802-091521.0 ppb
2019-11-139590-803-085015.0 ppb
2019-11-139590-804-101520.0 ppb
2019-11-139590-805-08151.20 ppb
2019-11-139590-806-105018.0 ppb
2019-11-139590-807-100020.0 ppb
2019-11-139590-808-08351.80 ppb