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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Suburban Water Systems-covina Knolls

NOTE: Suburban Water Systems-covina Knolls purchases water from Covina Irrigating Company which is required to test for dibromochloromethane. Sample information shown below was taken by Covina Irrigating Company.

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.

 

167

Samples

0

Samples exceeding legal limit (MCL)

98

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201215.9 ppb128ND - 52.0 ppb
201315.9 ppb12122.00 ppb - 64.0 ppb
201410.7 ppb12122.10 ppb - 34.0 ppb
20154.51 ppb84ND - 9.80 ppb
201612.6 ppb887.10 ppb - 19.0 ppb
20174.74 ppb86ND - 12.0 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

NOTE: Suburban Water Systems-covina Knolls purchases water from Covina Irrigating Company which is required to test for dibromochloromethane. Sample information shown below was taken by Covina Irrigating Company.

Date Lab ID Result
2012-04-269588-800-09001.10 ppb
2012-04-269588-801-09251.40 ppb
2012-04-269588-802-09451.20 ppb
2012-04-269588-803-1005ND
2012-04-269588-804-0910ND
2012-04-269588-805-0840ND
2012-04-269588-806-0850ND
2012-04-269588-807-0820ND
2012-07-259588-800-0950ND
2012-07-259588-801-1000ND
2012-07-259588-802-10151.10 ppb
2012-07-259588-803-1030ND
2012-07-259588-804-0940ND
2012-07-259588-805-0910ND
2012-07-259588-806-0920ND
2012-07-259588-807-0900ND
2012-10-249588-001-1040ND
2012-10-249588-002-1055ND
2012-10-249588-003-1110ND
2012-10-249588-800-09408.40 ppb
2012-10-249588-801-100534.0 ppb
2012-10-249588-802-1020ND
2012-10-249588-803-1035ND
2012-10-249588-804-095033.0 ppb
2012-10-249588-805-092031.0 ppb
2012-10-249588-806-093044.0 ppb
2012-10-249588-807-090030.0 ppb
2013-01-259588-800-09051.000 ppb
2013-01-259588-801-09152.00 ppb
2013-01-259588-802-10151.000 ppb
2013-01-259588-803-0945ND
2013-03-049588-804-09305.20 ppb
2013-03-049588-805-09101.20 ppb
2013-03-049588-806-09202.00 ppb
2013-03-049588-807-08551.10 ppb
2013-04-259588-800-1440ND
2013-04-259588-801-15001.10 ppb
2013-04-259588-802-1515ND
2013-04-259588-803-1530ND
2013-04-259588-804-14501.40 ppb
2013-04-259588-805-14201.30 ppb
2013-04-259588-806-14301.30 ppb
2013-04-259588-807-14001.30 ppb
2013-07-259588-800-0925ND
2013-07-259588-801-09451.10 ppb
2013-07-259588-802-1000ND
2013-07-259588-803-1020ND
2013-07-259588-804-09351.60 ppb
2013-07-259588-805-0905ND
2013-07-259588-806-0920ND
2013-07-259588-807-0845ND
2013-10-249588-001-1030ND
2013-10-249588-002-1035ND
2013-10-249588-003-1040ND
2013-10-249588-800-094023.0 ppb
2013-10-249588-801-100055.0 ppb
2013-10-249588-802-10101.10 ppb
2013-10-249588-803-1025ND
2013-10-249588-804-095044.0 ppb
2013-10-249588-805-093043.0 ppb
2013-10-249588-806-091539.0 ppb
2013-10-249588-807-090536.0 ppb
2014-04-259588-800-09501.30 ppb
2014-04-259588-801-10001.50 ppb
2014-04-259588-802-10151.20 ppb
2014-04-259588-803-1030ND
2014-04-259588-804-093022.0 ppb
2014-04-259588-805-09206.60 ppb
2014-04-259588-806-09405.40 ppb
2014-04-259588-807-09106.50 ppb
2014-07-259588-800-10051.10 ppb
2014-07-259588-801-10251.10 ppb
2014-07-259588-802-1040ND
2014-07-259588-803-1055ND
2014-07-259588-804-10151.40 ppb
2014-07-259588-805-09451.50 ppb
2014-07-259588-806-09551.50 ppb
2014-07-259588-807-09151.40 ppb
2014-10-249588-002-1005ND
2014-10-249588-003-1015ND
2014-10-249588-800-09152.10 ppb
2014-10-249588-801-09352.70 ppb
2014-10-249588-802-10301.10 ppb
2014-10-249588-803-0955ND
2014-10-249588-804-09252.60 ppb
2014-10-249588-805-08552.40 ppb
2014-10-249588-806-09052.30 ppb
2014-10-249588-807-08302.10 ppb
2015-03-199588-804-1015ND
2015-04-249588-800-0920ND
2015-04-249588-801-09301.10 ppb
2015-04-249588-802-0945ND
2015-04-249588-803-0955ND
2015-05-189588-804-123030.0 ppb
2015-05-189588-806-121535.0 ppb
2015-05-189588-807-114029.0 ppb
2015-07-249588-800-0935ND
2015-07-249588-801-0955ND
2015-07-249588-802-1005ND
2015-07-249588-803-1015ND
2015-07-249588-804-0945ND
2015-07-249588-806-0925ND
2015-07-249588-807-0915ND
2015-10-239588-801-0935ND
2015-10-239588-804-0925ND
2015-10-239588-805-0900ND
2015-10-239588-806-0910ND
2015-10-239588-807-0840ND
2015-11-109588-002-0900ND
2015-12-189588-800-075516.0 ppb
2015-12-189588-802-081017.0 ppb
2015-12-189588-803-0825ND
2016-01-259588-800-095011.0 ppb
2016-01-259588-801-101012.0 ppb
2016-01-259588-802-102512.0 ppb
2016-01-259588-804-100012.0 ppb
2016-01-259588-806-094011.0 ppb
2016-01-259588-807-092511.0 ppb
2016-04-259588-800-09352.50 ppb
2016-04-259588-801-09552.60 ppb
2016-04-259588-802-10052.60 ppb
2016-04-259588-804-09452.60 ppb
2016-04-259588-805-09202.30 ppb
2016-04-259588-806-09302.40 ppb
2016-04-259588-807-09002.00 ppb
2016-07-259588-800-095521.0 ppb
2016-07-259588-801-101523.0 ppb
2016-07-259588-802-103023.0 ppb
2016-07-259588-804-100523.0 ppb
2016-07-259588-805-094022.0 ppb
2016-07-259588-806-095022.0 ppb
2016-07-259588-807-093020.0 ppb
2016-10-259588-800-10009.50 ppb
2016-10-259588-801-10157.60 ppb
2016-10-259588-802-10309.00 ppb
2016-10-259588-804-10107.90 ppb
2016-10-259588-805-09456.10 ppb
2016-10-259588-806-09506.70 ppb
2016-10-259588-807-09355.40 ppb
2017-01-319588-800-11352.20 ppb
2017-01-319588-802-11552.00 ppb
2017-01-319588-804-11452.20 ppb
2017-01-319588-805-11152.20 ppb
2017-01-319588-806-11252.40 ppb
2017-01-319588-807-11002.30 ppb
2017-02-039588-801-08201.10 ppb
2017-04-259588-800-1220ND
2017-04-259588-801-1040ND
2017-04-259588-802-1050ND
2017-04-259588-804-1030ND
2017-04-259588-805-1000ND
2017-04-259588-806-1010ND
2017-04-259588-807-0940ND
2017-07-259588-800-1010ND
2017-07-259588-801-1040ND
2017-07-259588-802-1055ND
2017-07-259588-804-1025ND
2017-07-259588-806-1005ND
2017-07-259588-807-0955ND
2017-08-019588-805-0910ND
2017-10-259588-800-10106.40 ppb
2017-10-259588-801-10256.30 ppb
2017-10-259588-802-10357.40 ppb
2017-10-259588-804-10156.40 ppb
2017-10-259588-805-09556.00 ppb
2017-10-259588-806-10056.20 ppb
2017-10-259588-807-09306.00 ppb