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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

University 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.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

61

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.494 ppb168ND - 1.40 ppb
20151.67 ppb1613ND - 6.50 ppb
20160.981 ppb169ND - 4.00 ppb
20170.644 ppb166ND - 2.40 ppb
20181.11 ppb1612ND - 3.40 ppb
20191.78 ppb16160.900 ppb - 3.40 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
2014-01-282031245ND
2014-01-2820312460.600 ppb
2014-01-302031242ND
2014-01-3020312470.600 ppb
2014-04-2920499771.40 ppb
2014-04-3020499781.40 ppb
2014-04-3020499791.40 ppb
2014-04-3020499761.30 ppb
2014-07-282067436ND
2014-07-282071022ND
2014-07-302067455ND
2014-07-302071021ND
2014-10-3020906310.600 ppb
2014-10-302090640ND
2014-10-302090632ND
2014-10-3020906300.600 ppb
2015-01-29OE2121364.30 ppb
2015-01-29OE2121373.80 ppb
2015-01-29OE2121386.50 ppb
2015-01-29OE2121393.30 ppb
2015-04-27OE2358961.80 ppb
2015-04-27OE2358971.30 ppb
2015-04-27OE2358981.40 ppb
2015-04-27OE2358991.30 ppb
2015-07-30OE273632ND
2015-07-30OE2736330.500 ppb
2015-07-30OE2736310.600 ppb
2015-07-30OE273630ND
2015-10-29OE3134120.500 ppb
2015-10-29OE313414ND
2015-10-29OE3134130.600 ppb
2015-10-29OE3134110.800 ppb
2016-01-29OE3406054.00 ppb
2016-01-29OE3406063.60 ppb
2016-01-29OE3406071.20 ppb
2016-01-29OE3406083.80 ppb
2016-04-29OE3727700.600 ppb
2016-04-29OE3727710.600 ppb
2016-04-29OE3727690.600 ppb
2016-04-29OE3727680.700 ppb
2016-07-29OE407869ND
2016-07-29OE407870ND
2016-07-29OE4078680.600 ppb
2016-07-29OE407867ND
2016-10-31OE446789ND
2016-10-31OE446790ND
2016-10-31OE446787ND
2016-10-31OE446788ND
2017-01-30OE475197ND
2017-01-30OE475195ND
2017-01-30OE475198ND
2017-01-30OE475196ND
2017-04-19OE504071ND
2017-04-19OE504072ND
2017-04-19OE504073ND
2017-04-19OE504074ND
2017-07-19OE539583ND
2017-07-19OE539580ND
2017-07-19OE5395811.000 ppb
2017-07-19OE5395821.20 ppb
2017-10-30OE5839182.40 ppb
2017-10-30OE5839171.90 ppb
2017-10-30OE5839151.80 ppb
2017-10-30OE5839162.00 ppb
2018-01-29OE6161412.50 ppb
2018-01-29OE6161403.40 ppb
2018-01-29OE6161392.90 ppb
2018-01-29OE6161382.30 ppb
2018-04-27OE6507610.500 ppb
2018-04-27OE6507580.800 ppb
2018-04-27OE6507590.700 ppb
2018-04-27OE6507600.600 ppb
2018-07-31OE691634ND
2018-07-31OE691633ND
2018-07-31OE691632ND
2018-07-31OE691631ND
2018-10-30OE7334951.000 ppb
2018-10-30OE7334960.900 ppb
2018-10-30OE7334971.000 ppb
2018-10-30OE7334981.10 ppb
2019-01-28OE7650663.40 ppb
2019-01-28OE7650672.20 ppb
2019-01-28OE7650682.50 ppb
2019-01-28OE7650692.60 ppb
2019-04-23OE7985511.10 ppb
2019-04-23OE7985540.900 ppb
2019-04-23OE7985531.20 ppb
2019-04-23OE7985521.000 ppb
2019-07-26OE8407731.40 ppb
2019-07-26OE8407751.40 ppb
2019-07-26OE8407741.90 ppb
2019-07-26OE8407722.00 ppb
2019-10-30OE8869571.90 ppb
2019-10-30OE8869561.40 ppb
2019-10-30OE8869551.90 ppb
2019-10-30OE8869541.70 ppb