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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Lancaster

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.

MORE ABOUT THIS CONTAMINANT

 

207

Samples

0

Samples exceeding legal limit (MCL)

175

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20143.63 ppb32321.000 ppb - 9.20 ppb
20153.09 ppb34341.20 ppb - 7.40 ppb
20161.87 ppb26260.800 ppb - 4.10 ppb
20171.91 ppb40400.800 ppb - 4.40 ppb
20181.01 ppb4126ND - 2.70 ppb
20191.53 ppb3417ND - 5.80 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
2014-02-1010715240042.40 ppb
2014-02-1010715240022.00 ppb
2014-02-1010715240032.60 ppb
2014-02-1010715240072.30 ppb
2014-02-1110715240012.40 ppb
2014-02-1110715240061.40 ppb
2014-02-1110715240082.70 ppb
2014-02-1110715240051.90 ppb
2014-05-0520054550041.50 ppb
2014-05-0520054550011.000 ppb
2014-05-0520054550031.20 ppb
2014-05-0520054550071.20 ppb
2014-05-0620054550021.40 ppb
2014-05-0620054550061.10 ppb
2014-05-0620054550082.30 ppb
2014-05-0620054550051.40 ppb
2014-08-1120233410045.10 ppb
2014-08-1120233410018.00 ppb
2014-08-1120233410066.90 ppb
2014-08-1220233410029.20 ppb
2014-08-1220233410083.40 ppb
2014-08-1220233410079.00 ppb
2014-08-1220233410059.10 ppb
2014-08-2620258790012.60 ppb
2014-11-1020398250043.80 ppb
2014-11-1020398250024.90 ppb
2014-11-1020398250032.20 ppb
2014-11-1120398250014.50 ppb
2014-11-1120398250064.30 ppb
2014-11-1120398250084.70 ppb
2014-11-1120398250075.00 ppb
2014-11-1120398250054.60 ppb
2015-02-09124862212.00 ppb
2015-02-09124862092.20 ppb
2015-02-09124862332.20 ppb
2015-02-09124862151.20 ppb
2015-02-10124862033.00 ppb
2015-02-10124862451.80 ppb
2015-02-10124862393.00 ppb
2015-02-10124862272.00 ppb
2015-05-11128502762.40 ppb
2015-05-11128502882.20 ppb
2015-05-11128502702.40 ppb
2015-05-11128502942.10 ppb
2015-05-12128502642.40 ppb
2015-05-12128502582.50 ppb
2015-05-12128503003.30 ppb
2015-05-12128502822.40 ppb
2015-08-10132337804.10 ppb
2015-08-10132338045.50 ppb
2015-08-10132337743.60 ppb
2015-08-10132337985.10 ppb
2015-08-11132337685.70 ppb
2015-08-11132337625.90 ppb
2015-08-11132337924.70 ppb
2015-08-11132337864.20 ppb
2015-09-08133603357.40 ppb
2015-11-09136036712.70 ppb
2015-11-09136036532.30 ppb
2015-11-09136036651.80 ppb
2015-11-09136036772.30 ppb
2015-11-10136036592.30 ppb
2015-11-10136036832.00 ppb
2015-11-10136036952.60 ppb
2015-11-10136036892.50 ppb
2015-12-21137233923.10 ppb
2016-02-09139564191.60 ppb
2016-02-09139564241.40 ppb
2016-02-09139564251.40 ppb
2016-02-09139564261.30 ppb
2016-02-10139564201.40 ppb
2016-02-10139564211.40 ppb
2016-02-10139564221.20 ppb
2016-02-10139564231.60 ppb
2016-05-09143685182.30 ppb
2016-05-09143685191.50 ppb
2016-05-09143685202.10 ppb
2016-05-09143685220.800 ppb
2016-05-10143685211.30 ppb
2016-05-10143685231.10 ppb
2016-05-10143685241.50 ppb
2016-05-10143685251.30 ppb
2016-06-30146981104.10 ppb
2016-06-30146981362.90 ppb
2016-11-09154805802.10 ppb
2016-11-09154805812.10 ppb
2016-11-09154805851.80 ppb
2016-11-09154805861.60 ppb
2016-11-10154805793.40 ppb
2016-11-10154805821.70 ppb
2016-11-10154805833.10 ppb
2016-11-10154805842.50 ppb
2017-02-07157597061.20 ppb
2017-02-07157597091.40 ppb
2017-02-07157597112.10 ppb
2017-02-07157597081.30 ppb
2017-02-07157597051.10 ppb
2017-02-08157597101.80 ppb
2017-02-08157597071.30 ppb
2017-02-08157597122.80 ppb
2017-03-08159009821.50 ppb
2017-03-22159010111.60 ppb
2017-05-08162180311.10 ppb
2017-05-08162180321.10 ppb
2017-05-08162180301.000 ppb
2017-05-08162180270.900 ppb
2017-05-09162180260.800 ppb
2017-05-09162180281.000 ppb
2017-05-09162180291.000 ppb
2017-05-10162180341.50 ppb
2017-05-17162180820.900 ppb
2017-08-08166894401.70 ppb
2017-08-08166894442.10 ppb
2017-08-08166894391.40 ppb
2017-08-08166894411.80 ppb
2017-08-08166894421.80 ppb
2017-08-09166894432.00 ppb
2017-08-09166894452.30 ppb
2017-08-09166894462.30 ppb
2017-11-06171288992.10 ppb
2017-11-06171289212.80 ppb
2017-11-06171289432.00 ppb
2017-11-06171289542.10 ppb
2017-11-06171289651.40 ppb
2017-11-08171288883.10 ppb
2017-11-08171289101.70 ppb
2017-11-08171289322.90 ppb
2017-12-06172683733.10 ppb
2017-12-11172683953.30 ppb
2017-12-11172684062.60 ppb
2017-12-12172683844.00 ppb
2017-12-12172684174.40 ppb
2018-02-068002953-021.20 ppb
2018-02-068002953-052.00 ppb
2018-02-068002953-061.60 ppb
2018-02-068002953-071.50 ppb
2018-02-088002953-011.80 ppb
2018-02-088002953-031.60 ppb
2018-02-088002953-041.50 ppb
2018-02-088002953-081.60 ppb
2018-03-1323024310011.60 ppb
2018-04-1023086770011.90 ppb
2018-05-0723141400011.80 ppb
2018-05-0723141400052.70 ppb
2018-05-0723141400062.40 ppb
2018-05-0723141400071.20 ppb
2018-05-0723141400081.20 ppb
2018-05-0823141400021.10 ppb
2018-05-0823141400031.40 ppb
2018-05-0823141400041.20 ppb
2018-08-062331578002ND
2018-08-062331578003ND
2018-08-062331578004ND
2018-08-062331578005ND
2018-08-072331578006ND
2018-08-0723315780071.000 ppb
2018-08-0723315780081.10 ppb
2018-08-0823315780012.30 ppb
2018-09-2523410350011.50 ppb
2018-09-2523410350021.70 ppb
2018-11-0723491670011.30 ppb
2018-11-072349167003ND
2018-11-072349167004ND
2018-11-072349167005ND
2018-11-082349167002ND
2018-11-082349167006ND
2018-11-082349167007ND
2018-11-082349167008ND
2018-12-123006044002ND
2018-12-123006044003ND
2018-12-1230060440041.80 ppb
2018-12-1230060440051.30 ppb
2018-12-123006044006ND
2019-02-063015556002ND
2019-02-063015556004ND
2019-02-0630155560051.30 ppb
2019-02-063015556006ND
2019-02-063015556007ND
2019-02-073015556001ND
2019-02-073015556003ND
2019-02-073015556008ND
2019-05-0630326890011.80 ppb
2019-05-063032689002ND
2019-05-063032689004ND
2019-05-063032689005ND
2019-05-0730326890031.10 ppb
2019-05-0730326890061.10 ppb
2019-05-073032689007ND
2019-05-0730326890081.000 ppb
2019-08-0630502860025.10 ppb
2019-08-0630502860035.80 ppb
2019-08-0630502860044.80 ppb
2019-08-0630502860062.40 ppb
2019-08-0730502860014.10 ppb
2019-08-0730502860053.10 ppb
2019-08-0730502860075.30 ppb
2019-08-0730502860084.90 ppb
2019-09-1730588590015.50 ppb
2019-11-0730689200011.20 ppb
2019-11-073068920002ND
2019-11-073068920003ND
2019-11-0730689200041.50 ppb
2019-11-073068920005ND
2019-11-083069998001ND
2019-11-0830699980021.90 ppb
2019-11-083069998003ND
2019-12-183076613001ND