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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Hudson Waterworks

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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

 

91

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.581 ppb85ND - 3.00 ppb
20151.10 ppb98ND - 2.60 ppb
20161.43 ppb1615ND - 4.30 ppb
20170.590 ppb2115ND - 1.50 ppb
20180.643 ppb1815ND - 2.60 ppb
20190.768 ppb1915ND - 2.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-03-267767860.180 ppb
2014-03-267767920.470 ppb
2014-03-31777341ND
2014-06-16797090ND
2014-06-187978820.150 ppb
2014-08-188112130.850 ppb
2014-08-188112123.00 ppb
2015-02-04841974ND
2015-09-158831720.410 ppb
2015-09-158831740.500 ppb
2015-09-158831712.60 ppb
2015-09-158831732.30 ppb
2015-12-148979370.530 ppb
2015-12-148979361.40 ppb
2015-12-148979381.10 ppb
2015-12-148979391.10 ppb
2016-03-16910638ND
2016-03-169106372.50 ppb
2016-03-169106360.780 ppb
2016-03-169106351.60 ppb
2016-06-139265391.30 ppb
2016-06-139265411.80 ppb
2016-06-139265420.450 ppb
2016-06-139265400.440 ppb
2016-09-129448060.330 ppb
2016-09-129448071.60 ppb
2016-09-129448053.20 ppb
2016-09-129448044.30 ppb
2016-12-129659350.530 ppb
2016-12-129659340.840 ppb
2016-12-129659321.40 ppb
2016-12-129659331.80 ppb
2017-03-149778990.890 ppb
2017-03-149778961.000 ppb
2017-03-149778980.410 ppb
2017-03-14977897ND
2017-04-03980878ND
2017-04-03980874ND
2017-04-03980883ND
2017-04-04981146ND
2017-04-05981439ND
2017-06-139972471.50 ppb
2017-06-139972460.550 ppb
2017-06-139972450.480 ppb
2017-06-139972480.920 ppb
2017-09-1110173370.340 ppb
2017-09-1110173360.530 ppb
2017-09-1110173340.600 ppb
2017-09-1110173351.10 ppb
2017-12-1210331210.620 ppb
2017-12-1210331200.860 ppb
2017-12-1210331191.10 ppb
2017-12-1210331181.50 ppb
2018-03-1910457280.320 ppb
2018-03-1910457291.20 ppb
2018-03-1910457260.600 ppb
2018-03-1910457270.300 ppb
2018-06-1810620040.400 ppb
2018-06-1810620060.640 ppb
2018-06-1810620050.680 ppb
2018-06-1810620032.60 ppb
2018-06-251063650ND
2018-09-111079439ND
2018-09-1110794380.810 ppb
2018-09-1110794360.270 ppb
2018-09-1110794370.630 ppb
2018-10-231088635ND
2018-12-1110971810.380 ppb
2018-12-1110971840.270 ppb
2018-12-1110971830.570 ppb
2018-12-1910984601.90 ppb
2019-02-261106795ND
2019-03-1911104090.590 ppb
2019-03-1911104070.640 ppb
2019-03-1911104100.830 ppb
2019-03-1911104081.10 ppb
2019-05-081119849ND
2019-06-1811289380.970 ppb
2019-06-1811289371.20 ppb
2019-06-1811289390.380 ppb
2019-06-1811289400.270 ppb
2019-08-061139065ND
2019-09-171148789ND
2019-09-1711487900.630 ppb
2019-09-1711487870.640 ppb
2019-09-1711487881.90 ppb
2019-12-0911650550.920 ppb
2019-12-1611657590.820 ppb
2019-12-1611657611.70 ppb
2019-12-1611657602.00 ppb