Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromoform

City of Watsonville

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

152

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.67 ppb4731ND - 6.80 ppb
20152.81 ppb3229ND - 7.10 ppb
20163.25 ppb3230ND - 14.0 ppb
20171.32 ppb4620ND - 8.50 ppb
20181.87 ppb3226ND - 6.20 ppb
20192.48 ppb3216ND - 20.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-02-199590-801-13103.20 ppb
2014-02-199590-802-10302.00 ppb
2014-02-199590-803-09452.50 ppb
2014-02-199590-804-11452.60 ppb
2014-02-199590-805-08502.20 ppb
2014-02-199590-806-13453.10 ppb
2014-02-199590-807-11251.60 ppb
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
2014-05-219590-801-10002.10 ppb
2014-05-219590-802-09151.70 ppb
2014-05-219590-803-08452.50 ppb
2014-05-219590-804-09451.70 ppb
2014-05-219590-805-08094.00 ppb
2014-05-219590-806-10203.00 ppb
2014-05-219590-807-09301.70 ppb
2014-05-219590-808-08281.20 ppb
2014-08-139590-801-11102.90 ppb
2014-08-139590-802-09501.90 ppb
2014-08-139590-803-09202.50 ppb
2014-08-139590-804-10402.60 ppb
2014-08-139590-805-08153.40 ppb
2014-08-139590-806-11453.40 ppb
2014-08-139590-807-10203.10 ppb
2014-08-139590-808-08451.70 ppb
2014-11-129590-801-11452.70 ppb
2014-11-129590-802-10002.20 ppb
2014-11-129590-803-09402.90 ppb
2014-11-129590-804-10451.20 ppb
2014-11-129590-805-09006.80 ppb
2014-11-129590-806-12153.50 ppb
2014-11-129590-807-10251.30 ppb
2014-11-129590-808-09201.30 ppb
2015-02-099590-801-11503.20 ppb
2015-02-099590-802-10352.10 ppb
2015-02-099590-803-10102.30 ppb
2015-02-099590-804-11203.20 ppb
2015-02-099590-805-09204.80 ppb
2015-02-099590-806-12101.90 ppb
2015-02-099590-807-11003.30 ppb
2015-02-099590-808-09451.20 ppb
2015-05-139590-801-11103.90 ppb
2015-05-139590-802-10003.20 ppb
2015-05-139590-803-09302.70 ppb
2015-05-139590-804-10203.20 ppb
2015-05-139590-805-08307.10 ppb
2015-05-139590-806-11354.80 ppb
2015-05-139590-807-10503.20 ppb
2015-05-139590-808-09001.50 ppb
2015-08-129590-801-11301.80 ppb
2015-08-129590-802-10151.40 ppb
2015-08-129590-803-09453.20 ppb
2015-08-129590-804-11001.60 ppb
2015-08-129590-805-08555.60 ppb
2015-08-129590-806-13004.60 ppb
2015-08-129590-807-1040ND
2015-08-129590-808-0930ND
2015-11-099590-801-12502.70 ppb
2015-11-099590-802-11302.30 ppb
2015-11-099590-803-11002.20 ppb
2015-11-099590-804-1230ND
2015-11-099590-805-10057.10 ppb
2015-11-099590-806-13102.50 ppb
2015-11-099590-807-12002.00 ppb
2015-11-099590-808-10351.20 ppb
2016-02-109590-801-11502.60 ppb
2016-02-109590-802-10452.30 ppb
2016-02-109590-803-10102.40 ppb
2016-02-109590-804-11302.40 ppb
2016-02-109590-805-09002.80 ppb
2016-02-109590-806-12152.60 ppb
2016-02-109590-807-11102.60 ppb
2016-02-109590-808-0930ND
2016-05-239590-801-11301.70 ppb
2016-05-239590-802-10301.60 ppb
2016-05-239590-803-09302.60 ppb
2016-05-239590-804-11051.60 ppb
2016-05-239590-805-08454.90 ppb
2016-05-239590-806-11552.50 ppb
2016-05-239590-807-10501.40 ppb
2016-05-239590-808-09051.10 ppb
2016-08-179590-801-13002.60 ppb
2016-08-179590-802-11303.50 ppb
2016-08-179590-803-10306.20 ppb
2016-08-179590-804-13303.40 ppb
2016-08-179590-805-091514.0 ppb
2016-08-179590-806-13508.80 ppb
2016-08-179590-807-12303.30 ppb
2016-08-179590-808-10001.80 ppb
2016-11-099590-801-12302.60 ppb
2016-11-099590-802-10152.80 ppb
2016-11-099590-803-09501.90 ppb
2016-11-099590-804-12002.60 ppb
2016-11-099590-805-090512.0 ppb
2016-11-099590-806-12502.00 ppb
2016-11-099590-807-10501.30 ppb
2016-11-099590-808-0930ND
2017-02-279590-801-12153.20 ppb
2017-02-279590-802-10153.30 ppb
2017-02-279590-803-09452.20 ppb
2017-02-279590-804-11152.50 ppb
2017-02-279590-805-08452.90 ppb
2017-02-279590-806-12352.30 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
2017-05-319590-801-11301.60 ppb
2017-05-319590-802-10251.70 ppb
2017-05-319590-803-10002.20 ppb
2017-05-319590-804-11101.60 ppb
2017-05-319590-805-09008.20 ppb
2017-05-319590-806-11503.30 ppb
2017-05-319590-807-10501.50 ppb
2017-05-319590-808-09351.60 ppb
2017-08-169590-801-1255ND
2017-08-169590-802-1150ND
2017-08-169590-803-1040ND
2017-08-169590-804-1220ND
2017-08-169590-805-09508.50 ppb
2017-08-169590-806-13303.50 ppb
2017-08-169590-807-1240ND
2017-08-169590-808-10201.90 ppb
2017-11-149590-801-1200ND
2017-11-149590-802-1035ND
2017-11-149590-803-1010ND
2017-11-149590-804-1110ND
2017-11-149590-805-09204.40 ppb
2017-11-149590-806-1230ND
2017-11-149590-807-1130ND
2017-11-149590-808-09501.70 ppb
2018-02-149590-801-13002.00 ppb
2018-02-149590-802-12001.70 ppb
2018-02-149590-803-11401.90 ppb
2018-02-149590-804-12401.80 ppb
2018-02-149590-805-11003.90 ppb
2018-02-149590-806-13152.80 ppb
2018-02-149590-807-12201.90 ppb
2018-02-149590-808-11201.60 ppb
2018-05-099590-801-14101.80 ppb
2018-05-099590-802-13101.50 ppb
2018-05-099590-803-12401.80 ppb
2018-05-099590-804-13501.60 ppb
2018-05-099590-805-12006.20 ppb
2018-05-099590-806-14402.50 ppb
2018-05-099590-807-13301.20 ppb
2018-05-099590-808-12201.10 ppb
2018-08-229590-801-10102.10 ppb
2018-08-229590-802-10401.40 ppb
2018-08-229590-803-11102.60 ppb
2018-08-229590-804-09201.20 ppb
2018-08-229590-805-12005.80 ppb
2018-08-229590-806-08303.30 ppb
2018-08-229590-807-09451.30 ppb
2018-08-229590-808-11301.20 ppb
2018-11-139590-801-1210ND
2018-11-139590-802-1045ND
2018-11-139590-803-1015ND
2018-11-139590-804-1100ND
2018-11-139590-805-09304.10 ppb
2018-11-139590-806-1230ND
2018-11-139590-807-1130ND
2018-11-139590-808-10001.40 ppb
2019-02-209590-801-1100ND
2019-02-209590-802-09551.30 ppb
2019-02-209590-803-09351.20 ppb
2019-02-209590-804-10401.70 ppb
2019-02-209590-805-082514.0 ppb
2019-02-209590-806-1125ND
2019-02-209590-807-10201.80 ppb
2019-02-209590-808-0915ND
2019-05-089590-801-10001.000 ppb
2019-05-089590-802-09001.50 ppb
2019-05-089590-803-08452.10 ppb
2019-05-089590-804-09401.80 ppb
2019-05-089590-805-080020.0 ppb
2019-05-089590-806-10302.30 ppb
2019-05-089590-807-09202.00 ppb
2019-05-089590-808-0820ND
2019-08-149590-801-1230ND
2019-08-149590-802-1110ND
2019-08-149590-803-1040ND
2019-08-149590-804-1210ND
2019-08-149590-805-09457.30 ppb
2019-08-149590-806-1250ND
2019-08-149590-807-1150ND
2019-08-149590-808-1010ND
2019-11-139590-801-1030ND
2019-11-139590-802-0915ND
2019-11-139590-803-08501.20 ppb
2019-11-139590-804-1015ND
2019-11-139590-805-081519.0 ppb
2019-11-139590-806-1050ND
2019-11-139590-807-1000ND
2019-11-139590-808-08351.000 ppb