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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

El Dorado Waterworks

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

 

155

Samples

0

Samples exceeding legal limit (MCL)

142

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201410.3 ppb2625ND - 27.8 ppb
20157.20 ppb2726ND - 21.9 ppb
20164.39 ppb2322ND - 13.5 ppb
20179.03 ppb2827ND - 26.2 ppb
20184.77 ppb2726ND - 13.2 ppb
20196.39 ppb2422ND - 20.7 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
2014-01-15140160117011.89 ppb
2014-01-15140160119015.66 ppb
2014-03-051406600300211.5 ppb
2014-03-0514066000602ND
2014-03-051406600050214.3 ppb
2014-03-051406600040211.3 ppb
2014-04-29141210027023.33 ppb
2014-04-29141210027014.74 ppb
2014-04-29141210024014.01 ppb
2014-06-101416300620210.4 ppb
2014-06-111416300760220.7 ppb
2014-06-111416300710213.7 ppb
2014-06-111416300770214.1 ppb
2014-08-04142190094010.101 ppb
2014-08-041421900890110.4 ppb
2014-08-251423900050227.8 ppb
2014-08-251423900060216.4 ppb
2014-08-25142390001026.90 ppb
2014-08-251423900040214.0 ppb
2014-11-12143170032019.98 ppb
2014-11-12143170029015.32 ppb
2014-11-121431700280224.3 ppb
2014-11-12143170030027.90 ppb
2014-11-121431700310217.5 ppb
2014-11-12143170029023.49 ppb
2014-11-12143170033028.10 ppb
2015-03-10150710029011.71 ppb
2015-03-10150710032010.162 ppb
2015-03-101507100310221.9 ppb
2015-03-101507100340213.7 ppb
2015-03-10150710033029.90 ppb
2015-03-10150710030021.80 ppb
2015-05-27151480093010.230 ppb
2015-05-27151480092011.47 ppb
2015-05-27151480092020.830 ppb
2015-06-021515400190213.3 ppb
2015-06-02151540011021.90 ppb
2015-06-021515400120214.9 ppb
2015-06-021515400200213.9 ppb
2015-07-14151970062030.492 ppb
2015-07-14151970064030.191 ppb
2015-08-25152380022016.94 ppb
2015-08-25152380021018.56 ppb
2015-08-3115246000402ND
2015-08-311524600090212.7 ppb
2015-08-31152460007026.90 ppb
2015-08-311524600080216.2 ppb
2015-11-04153090044030.568 ppb
2015-11-04153090045030.220 ppb
2015-11-301533500100213.6 ppb
2015-12-01153350012021.90 ppb
2015-12-011533500130213.6 ppb
2015-12-011533500110216.8 ppb
2016-01-12160150077010.190 ppb
2016-01-12160150076010.492 ppb
2016-03-08160700034022.60 ppb
2016-03-08160700035024.90 ppb
2016-03-0816070003602ND
2016-03-081607000370213.5 ppb
2016-04-11161050046012.19 ppb
2016-04-11161050048010.137 ppb
2016-04-11161050046021.18 ppb
2016-06-06161610056024.90 ppb
2016-06-06161610058024.40 ppb
2016-06-06161610057024.40 ppb
2016-06-08161610074022.30 ppb
2016-09-07162520083016.53 ppb
2016-09-07162520080029.20 ppb
2016-09-07162520081023.70 ppb
2016-09-07162520079026.00 ppb
2016-09-07162520076024.20 ppb
2016-09-08162520082010.0406 ppb
2016-11-281633600380210.3 ppb
2016-11-281633600390210.4 ppb
2016-11-28163360040022.10 ppb
2016-11-28163360041027.40 ppb
2017-02-13170460048010.148 ppb
2017-02-13170460047012.31 ppb
2017-03-131707500010214.5 ppb
2017-03-13170750003024.50 ppb
2017-03-131707500020212.5 ppb
2017-03-13170750004025.50 ppb
2017-04-25171170018010.0656 ppb
2017-04-25171170017012.50 ppb
2017-06-131716600150218.1 ppb
2017-06-131716600160126.2 ppb
2017-06-131716600160214.2 ppb
2017-06-131716600170224.8 ppb
2017-06-131716600190216.7 ppb
2017-06-131716600200217.5 ppb
2017-06-131716600180114.7 ppb
2017-07-11171930023012.95 ppb
2017-07-11171930024010.198 ppb
2017-09-12172570019029.30 ppb
2017-09-12172570018029.10 ppb
2017-09-121725700170212.1 ppb
2017-09-121725700160212.4 ppb
2017-10-11172850006012.78 ppb
2017-10-1117285000502ND
2017-10-11172850005010.222 ppb
2017-12-111734800140211.9 ppb
2017-12-11173480016021.60 ppb
2017-12-111734800150210.1 ppb
2017-12-11173480013025.90 ppb
2018-02-26180600024010.198 ppb
2018-02-26180600023012.69 ppb
2018-03-13180730043027.50 ppb
2018-03-13180730042027.50 ppb
2018-03-13180730045025.00 ppb
2018-03-13180730044024.60 ppb
2018-04-30181230057021.57 ppb
2018-04-30181230057011.98 ppb
2018-04-30181230058015.39 ppb
2018-06-12181650059026.00 ppb
2018-06-12181650058026.30 ppb
2018-06-12181650057022.80 ppb
2018-06-12181650060024.40 ppb
2018-07-10181930066010.0392 ppb
2018-07-10181930067013.70 ppb
2018-07-30182140009036.18 ppb
2018-07-30182140010034.15 ppb
2018-09-101825600530213.2 ppb
2018-09-10182560054023.50 ppb
2018-09-101825600520210.5 ppb
2018-09-10182560055022.40 ppb
2018-10-1018284000503ND
2018-10-10182840006033.60 ppb
2018-12-04183400025024.60 ppb
2018-12-04183400024028.40 ppb
2018-12-04183400022021.90 ppb
2018-12-041834000230210.8 ppb
2019-01-16190170002010.0447 ppb
2019-01-16190170001012.10 ppb
2019-03-11190730032021.70 ppb
2019-03-111907300300215.4 ppb
2019-03-111907300290210.1 ppb
2019-03-111907300310214.6 ppb
2019-05-1319136000401ND
2019-05-13191360004026.40 ppb
2019-05-1319136000501ND
2019-06-101916400230212.7 ppb
2019-06-10191640022021.80 ppb
2019-06-101916400260215.6 ppb
2019-06-101916400240210.4 ppb
2019-07-16191980027010.01000 ppb
2019-09-10192540015021.90 ppb
2019-09-10192540018026.10 ppb
2019-09-10192540016024.50 ppb
2019-09-10192540017023.50 ppb
2019-10-28193030009012.28 ppb
2019-10-28193030010010.00646 ppb
2019-12-02193390013022.10 ppb
2019-12-021933900160213.0 ppb
2019-12-021933900140220.7 ppb
2019-12-02193390015028.30 ppb