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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Hudson 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

 

90

Samples

0

Samples exceeding legal limit (MCL)

76

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.831 ppb75ND - 3.90 ppb
20151.58 ppb98ND - 3.30 ppb
20161.92 ppb16160.280 ppb - 4.70 ppb
20170.923 ppb2117ND - 2.70 ppb
20181.08 ppb1815ND - 4.70 ppb
20190.985 ppb1915ND - 2.80 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
2014-03-26776789ND
2014-03-267767860.380 ppb
2014-03-267767920.480 ppb
2014-03-31777341ND
2014-06-167970900.150 ppb
2014-08-188112130.910 ppb
2014-08-188112123.90 ppb
2015-02-04841974ND
2015-09-158831712.10 ppb
2015-09-158831733.30 ppb
2015-09-158831741.60 ppb
2015-09-158831720.660 ppb
2015-12-148979361.30 ppb
2015-12-148979381.90 ppb
2015-12-148979392.40 ppb
2015-12-148979371.000 ppb
2016-03-169106380.560 ppb
2016-03-169106361.20 ppb
2016-03-169106372.10 ppb
2016-03-169106352.90 ppb
2016-06-139265420.500 ppb
2016-06-139265411.20 ppb
2016-06-139265401.40 ppb
2016-06-139265392.30 ppb
2016-09-129448060.280 ppb
2016-09-129448044.70 ppb
2016-09-129448054.30 ppb
2016-09-129448071.70 ppb
2016-12-129659322.30 ppb
2016-12-129659333.30 ppb
2016-12-129659351.20 ppb
2016-12-129659340.750 ppb
2017-03-149778970.400 ppb
2017-03-149778980.420 ppb
2017-03-149778991.20 ppb
2017-03-149778961.80 ppb
2017-04-03980883ND
2017-04-03980878ND
2017-04-039808740.220 ppb
2017-04-04981146ND
2017-04-05981439ND
2017-06-139972450.400 ppb
2017-06-139972482.70 ppb
2017-06-139972472.60 ppb
2017-06-139972461.10 ppb
2017-09-1110173370.310 ppb
2017-09-1110173351.40 ppb
2017-09-1110173341.20 ppb
2017-09-1110173360.770 ppb
2017-12-1210331200.770 ppb
2017-12-1210331181.40 ppb
2017-12-1210331191.70 ppb
2017-12-1210331211.000 ppb
2018-03-1910457281.10 ppb
2018-03-1910457292.10 ppb
2018-03-1910457260.870 ppb
2018-03-1910457270.310 ppb
2018-06-1810620060.860 ppb
2018-06-1810620050.530 ppb
2018-06-1810620041.50 ppb
2018-06-1810620034.70 ppb
2018-06-251063650ND
2018-09-111079439ND
2018-09-1110794381.10 ppb
2018-09-1110794370.780 ppb
2018-09-1110794360.890 ppb
2018-10-231088635ND
2018-12-1110971811.10 ppb
2018-12-1110971840.220 ppb
2018-12-1110971830.710 ppb
2018-12-1910984602.60 ppb
2019-02-261106795ND
2019-03-1911104090.710 ppb
2019-03-1911104100.740 ppb
2019-03-1911104071.10 ppb
2019-03-1911104081.40 ppb
2019-05-081119849ND
2019-06-1811289381.10 ppb
2019-06-1811289371.70 ppb
2019-06-1811289390.580 ppb
2019-06-1811289400.240 ppb
2019-08-061139065ND
2019-09-171148789ND
2019-09-1711487870.670 ppb
2019-09-1711487900.980 ppb
2019-09-1711487882.80 ppb
2019-12-0911650551.80 ppb
2019-12-1611657591.10 ppb
2019-12-1611657611.50 ppb
2019-12-1611657602.30 ppb