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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Jefferson County W and S District - M

NOTE: Jefferson County W and S District - M purchases water from Toronto Public Water System which is required to test for bromoform. Sample information shown below was taken by Toronto Public Water System.

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

23

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20124.43 ppb16161.20 ppb - 9.70 ppb
20131.36 ppb1715ND - 2.50 ppb
20140.648 ppb168ND - 1.70 ppb
20152.66 ppb16161.20 ppb - 6.04 ppb
20161.97 ppb1615ND - 5.71 ppb
20170.953 ppb168ND - 3.20 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

NOTE: Jefferson County W and S District - M purchases water from Toronto Public Water System which is required to test for bromoform. Sample information shown below was taken by Toronto Public Water System.

Date Lab ID Result
2012-01-109900088487ND
2012-04-1099000034351.60 ppb
2012-08-2899000541597.00 ppb
2012-11-2799000716111.60 ppb
2013-01-0899000718960.760 ppb
2013-01-0899000034360.680 ppb
2013-04-0999000105251.000 ppb
2013-04-0999000105261.40 ppb
2013-07-099900128985ND
2013-07-099900128987ND
2013-10-08A1301477455.50 ppb
2013-10-08A1301336886.30 ppb
2014-01-08A140079063ND
2014-01-08A140124485ND
2014-04-08A140183076ND
2014-04-08A140136427ND
2014-07-08A140213918ND
2014-07-08A140213919ND
2014-10-14A1402166275.00 ppb
2014-10-14A1402166255.10 ppb
2015-01-13A150231656ND
2015-01-13A150231654ND
2015-04-14A150259227ND
2015-04-14A150231653ND
2015-07-14A150310879ND
2015-07-14A150310877ND
2015-10-13A1501828504.16 ppb
2015-10-13A1501828514.66 ppb
2016-01-11A160338170ND
2016-01-11A160338171ND
2016-04-12A1603747420.840 ppb
2016-04-12A1603747430.800 ppb
2016-07-12A1603994012.58 ppb
2016-07-12A1603993992.61 ppb
2016-10-11A1604274897.88 ppb
2016-10-11A1604274908.78 ppb
2017-01-10A1704678010.640 ppb
2017-01-10A1704532870.620 ppb
2017-04-11A170477078ND
2017-04-11A170477079ND
2017-07-11A170498095ND
2017-07-11A170498096ND
2017-10-10A1700790613.70 ppb
2017-10-10A1700790604.70 ppb