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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Two Rivers 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

 

98

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.268 ppb1711ND - 0.570 ppb
20150.275 ppb1611ND - 0.610 ppb
20160.278 ppb1615ND - 0.430 ppb
20170.0419 ppb163ND - 0.230 ppb
20180.0718 ppb174ND - 0.330 ppb
20190.0413 ppb163ND - 0.250 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
2014-03-127744990.480 ppb
2014-03-127744970.500 ppb
2014-03-127744960.530 ppb
2014-03-127744980.570 ppb
2014-04-23782154ND
2014-06-09795330ND
2014-06-09795328ND
2014-06-097953310.290 ppb
2014-06-097953290.300 ppb
2014-09-098166870.450 ppb
2014-09-098166880.480 ppb
2014-09-098166890.450 ppb
2014-09-098166900.220 ppb
2014-12-038341840.290 ppb
2014-12-03834182ND
2014-12-03834181ND
2014-12-03834183ND
2015-03-108474020.400 ppb
2015-03-108474050.240 ppb
2015-03-108474040.280 ppb
2015-03-108474030.380 ppb
2015-06-098644870.290 ppb
2015-06-098644890.320 ppb
2015-06-098644860.280 ppb
2015-06-09864488ND
2015-09-088813570.610 ppb
2015-09-088813580.550 ppb
2015-09-088813590.540 ppb
2015-09-088813560.510 ppb
2015-12-08897400ND
2015-12-08897399ND
2015-12-08897402ND
2015-12-08897401ND
2016-03-089089090.220 ppb
2016-03-089089070.240 ppb
2016-03-089089080.270 ppb
2016-03-089089060.260 ppb
2016-06-079253510.280 ppb
2016-06-079253530.260 ppb
2016-06-079253500.240 ppb
2016-06-07925352ND
2016-09-079437330.250 ppb
2016-09-079437320.260 ppb
2016-09-079437350.340 ppb
2016-09-079437340.350 ppb
2016-12-069645210.240 ppb
2016-12-069645200.390 ppb
2016-12-069645220.420 ppb
2016-12-069645230.430 ppb
2017-03-07976540ND
2017-03-079765370.220 ppb
2017-03-079765390.220 ppb
2017-03-079765380.230 ppb
2017-06-07996156ND
2017-06-07996155ND
2017-06-07996157ND
2017-06-07996158ND
2017-09-061016354ND
2017-09-061016356ND
2017-09-061016357ND
2017-09-061016355ND
2017-12-051032191ND
2017-12-051032190ND
2017-12-051032189ND
2017-12-051032192ND
2018-01-291038870ND
2018-03-121044622ND
2018-03-121044620ND
2018-03-121044621ND
2018-03-121044623ND
2018-06-131061274ND
2018-06-131061273ND
2018-06-131061275ND
2018-06-131061272ND
2018-09-1310802460.330 ppb
2018-09-1310802440.320 ppb
2018-09-1310802450.300 ppb
2018-09-1310802470.270 ppb
2018-12-051095827ND
2018-12-051095828ND
2018-12-051095829ND
2018-12-051095830ND
2019-03-131109444ND
2019-03-1311094420.170 ppb
2019-03-1311094430.240 ppb
2019-03-1311094450.250 ppb
2019-06-101126356ND
2019-06-101126357ND
2019-06-101126359ND
2019-06-101126358ND
2019-09-031144991ND
2019-09-031144990ND
2019-09-031144992ND
2019-09-031144989ND
2019-12-031163159ND
2019-12-031163157ND
2019-12-031163158ND
2019-12-031163160ND