Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromoform

Hudson Waterworks

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

45

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.449 ppb73ND - 2.30 ppb
20151.14 ppb97ND - 2.80 ppb
20161.28 ppb1614ND - 2.90 ppb
20170.660 ppb2113ND - 3.60 ppb
20180.811 ppb1811ND - 3.70 ppb
20190.523 ppb1913ND - 2.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-03-26776792ND
2014-03-26776789ND
2014-03-267767860.310 ppb
2014-03-31777341ND
2014-06-16797090ND
2014-08-188112130.530 ppb
2014-08-188112122.30 ppb
2015-02-04841974ND
2015-09-15883172ND
2015-09-158831710.620 ppb
2015-09-158831742.40 ppb
2015-09-158831731.90 ppb
2015-12-148979392.80 ppb
2015-12-148979370.660 ppb
2015-12-148979360.360 ppb
2015-12-148979381.50 ppb
2016-03-169106352.50 ppb
2016-03-169106370.530 ppb
2016-03-169106360.650 ppb
2016-03-169106381.20 ppb
2016-06-139265392.00 ppb
2016-06-139265402.40 ppb
2016-06-139265410.240 ppb
2016-06-13926542ND
2016-09-12944806ND
2016-09-129448070.620 ppb
2016-09-129448052.40 ppb
2016-09-129448042.10 ppb
2016-12-129659340.210 ppb
2016-12-129659332.90 ppb
2016-12-129659350.930 ppb
2016-12-129659321.80 ppb
2017-03-149778990.600 ppb
2017-03-149778961.40 ppb
2017-03-149778970.530 ppb
2017-03-14977898ND
2017-04-03980878ND
2017-04-039808740.290 ppb
2017-04-03980883ND
2017-04-04981146ND
2017-04-05981439ND
2017-06-13997245ND
2017-06-139972460.690 ppb
2017-06-139972472.00 ppb
2017-06-139972483.60 ppb
2017-09-111017337ND
2017-09-1110173360.350 ppb
2017-09-1110173341.30 ppb
2017-09-1110173350.660 ppb
2017-12-121033120ND
2017-12-1210331191.20 ppb
2017-12-1210331180.590 ppb
2017-12-1210331210.660 ppb
2018-03-191045727ND
2018-03-1910457260.350 ppb
2018-03-1910457291.20 ppb
2018-03-1910457281.50 ppb
2018-06-181062005ND
2018-06-181062006ND
2018-06-1810620042.80 ppb
2018-06-1810620033.70 ppb
2018-06-251063650ND
2018-09-1110794361.000 ppb
2018-09-111079439ND
2018-09-1110794380.540 ppb
2018-09-1110794370.480 ppb
2018-10-231088635ND
2018-12-1110971830.320 ppb
2018-12-111097184ND
2018-12-1110971811.30 ppb
2018-12-1910984601.40 ppb
2019-02-261106795ND
2019-03-191110410ND
2019-03-1911104090.350 ppb
2019-03-1911104080.980 ppb
2019-03-1911104071.000 ppb
2019-05-081119849ND
2019-06-1811289370.820 ppb
2019-06-1811289380.440 ppb
2019-06-1811289390.230 ppb
2019-06-181128940ND
2019-08-061139065ND
2019-09-171148789ND
2019-09-1711487870.280 ppb
2019-09-1711487900.410 ppb
2019-09-1711487882.00 ppb
2019-12-0911650551.70 ppb
2019-12-1611657610.270 ppb
2019-12-1611657590.460 ppb
2019-12-1611657601.000 ppb