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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Greendale 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

 

96

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.373 ppb16160.240 ppb - 0.520 ppb
20150.398 ppb16160.240 ppb - 0.670 ppb
20160.268 ppb1613ND - 0.440 ppb
20170.182 ppb168ND - 0.440 ppb
20180.0963 ppb166ND - 0.280 ppb
20190.263 ppb1615ND - 0.590 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
2014-03-057733190.310 ppb
2014-03-057733200.380 ppb
2014-03-057733210.410 ppb
2014-03-057733180.290 ppb
2014-06-037941660.430 ppb
2014-06-037941680.440 ppb
2014-06-037941650.490 ppb
2014-06-037941670.520 ppb
2014-09-028147830.420 ppb
2014-09-028147840.480 ppb
2014-09-028147810.420 ppb
2014-09-028147820.380 ppb
2014-12-028336350.250 ppb
2014-12-028336330.240 ppb
2014-12-028336340.240 ppb
2014-12-028336320.260 ppb
2015-03-048464460.350 ppb
2015-03-048464470.370 ppb
2015-03-048464450.360 ppb
2015-03-048464480.350 ppb
2015-06-028631120.330 ppb
2015-06-028631110.300 ppb
2015-06-028631100.270 ppb
2015-06-028631130.420 ppb
2015-09-028806470.670 ppb
2015-09-028806460.630 ppb
2015-09-028806480.580 ppb
2015-09-028806490.500 ppb
2015-12-028962710.290 ppb
2015-12-028962730.420 ppb
2015-12-028962720.290 ppb
2015-12-028962700.240 ppb
2016-03-09909381ND
2016-03-09909379ND
2016-03-09909380ND
2016-03-099093820.280 ppb
2016-06-089258750.390 ppb
2016-06-089258740.310 ppb
2016-06-089258730.290 ppb
2016-06-089258720.280 ppb
2016-09-079440060.270 ppb
2016-09-079440080.320 ppb
2016-09-079440070.360 ppb
2016-09-079440090.440 ppb
2016-11-309622670.300 ppb
2016-11-309622660.310 ppb
2016-11-309622640.340 ppb
2016-11-309622650.400 ppb
2017-03-08976955ND
2017-03-089769560.260 ppb
2017-03-089769570.310 ppb
2017-03-089769580.440 ppb
2017-06-07996318ND
2017-06-07996319ND
2017-06-07996320ND
2017-06-07996321ND
2017-09-0610163830.330 ppb
2017-09-0610163820.380 ppb
2017-09-0610163840.400 ppb
2017-09-0610163850.400 ppb
2017-12-061032495ND
2017-12-061032494ND
2017-12-061032493ND
2017-12-0610324920.390 ppb
2018-03-071044158ND
2018-03-071044159ND
2018-03-071044157ND
2018-03-071044156ND
2018-06-061059687ND
2018-06-061059686ND
2018-06-061059684ND
2018-06-061059685ND
2018-09-051078434ND
2018-09-0510784350.250 ppb
2018-09-0510784360.250 ppb
2018-09-0510784370.260 ppb
2018-12-0610965100.240 ppb
2018-12-0610965080.280 ppb
2018-12-061096507ND
2018-12-0610965090.260 ppb
2019-03-0611082460.200 ppb
2019-03-0611082430.220 ppb
2019-03-0611082440.240 ppb
2019-03-0611082450.260 ppb
2019-06-0511256520.250 ppb
2019-06-0511256540.240 ppb
2019-06-0511256510.220 ppb
2019-06-051125653ND
2019-09-0411454240.270 ppb
2019-09-0411454250.280 ppb
2019-09-0411454230.300 ppb
2019-09-0411454220.590 ppb
2019-12-0411635710.240 ppb
2019-12-0411635720.260 ppb
2019-12-0411635730.260 ppb
2019-12-0411635700.380 ppb