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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

City of Ripon

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.

 

80

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
20130.150 ppb62ND - 0.500 ppb
20140.0583 ppb121ND - 0.700 ppb
20150.0571 ppb213ND - 0.400 ppb
20160.242 ppb195ND - 1.10 ppb
20170.694 ppb189ND - 2.70 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
2012-06-132625-007-0927ND
2012-06-132625-003-0725ND
2012-06-132625-022-1013ND
2012-07-182625-024-1040ND
2013-06-262625-010-1425ND
2013-10-292625-020-0935ND
2013-11-052625-900-0850ND
2013-11-052625-902-09500.400 ppb
2013-11-052625-901-09380.500 ppb
2013-11-052625-903-1050ND
2014-02-052625-901-1115ND
2014-02-052625-900-1006ND
2014-02-052625-903-1027ND
2014-02-052625-902-1140ND
2014-05-072625-901-1352ND
2014-05-072625-900-1334ND
2014-05-072625-902-1408ND
2014-05-072625-903-1311ND
2014-08-112625-900-0951ND
2014-08-112625-902-1100ND
2014-08-112625-903-0916ND
2014-08-112625-901-10470.700 ppb
2015-02-182625-903-0958ND
2015-02-182625-901-1035ND
2015-02-182625-902-1047ND
2015-02-182625-900-1017ND
2015-05-052625-901-09450.400 ppb
2015-05-052625-903-0925ND
2015-05-052625-902-1000ND
2015-05-052625-900-0910ND
2015-06-082625-003-1138ND
2015-06-082625-022-1030ND
2015-06-082625-007-0955ND
2015-07-082625-024-0955ND
2015-08-055810-903-0915ND
2015-08-055810-901-0935ND
2015-08-055810-902-1000ND
2015-08-055810-900-0900ND
2015-11-032625-903-09450.400 ppb
2015-11-032625-900-09450.400 ppb
2015-11-032625-903-0920ND
2015-11-032625-901-1015ND
2015-11-032625-902-1045ND
2016-02-112625-900-1035ND
2016-02-112625-902-0910ND
2016-02-112625-901-1020ND
2016-02-112625-903-1055ND
2016-05-032625-901-14151.000 ppb
2016-05-032625-903-14301.10 ppb
2016-05-032625-900-14450.900 ppb
2016-05-032625-902-14001.10 ppb
2016-06-152625-003-0800ND
2016-06-152625-010-0820ND
2016-08-032625-900-1420ND
2016-08-032625-902-1345ND
2016-08-032625-901-1400ND
2016-08-032625-903-1410ND
2016-10-202625-020-10450.500 ppb
2016-11-022625-901-0830ND
2016-11-022625-900-0815ND
2016-11-022625-903-0900ND
2016-11-022625-902-0845ND
2017-02-022625-902-11341.30 ppb
2017-02-022625-903-1110ND
2017-02-022625-900-10471.30 ppb
2017-02-022625-901-11201.000 ppb
2017-05-182625-900-07571.50 ppb
2017-05-182625-902-09102.70 ppb
2017-05-182625-903-09341.10 ppb
2017-05-182625-901-0825ND
2017-06-142625-010-0930ND
2017-08-012625-902-09581.20 ppb
2017-08-012625-901-10221.30 ppb
2017-08-012625-903-0905ND
2017-08-012625-900-08351.10 ppb
2017-10-242625-020-1020ND
2017-11-152625-902-1350ND
2017-11-152625-903-1325ND
2017-11-152625-900-1305ND
2017-11-152625-901-1410ND