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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Danville

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

 

137

Samples

0

Samples exceeding legal limit (MCL)

82

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.55 ppb4134ND - 5.00 ppb
20151.86 ppb2819ND - 7.20 ppb
20160.618 ppb175ND - 5.40 ppb
20171.01 ppb1712ND - 2.50 ppb
20181.09 ppb176ND - 7.30 ppb
20191.01 ppb178ND - 4.66 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
2014-02-04E1401002722.10 ppb
2014-02-04E1401002661.60 ppb
2014-02-04E1401002761.60 ppb
2014-02-04E1401002671.10 ppb
2014-02-04E1401002651.10 ppb
2014-02-04E1401002820.700 ppb
2014-02-07E1402012260.800 ppb
2014-02-07E1402012240.700 ppb
2014-02-07E1402012250.600 ppb
2014-02-07E140201223ND
2014-02-07E140201227ND
2014-05-05E1403073590.800 ppb
2014-05-05E1403073530.800 ppb
2014-05-05E1403073560.700 ppb
2014-05-05E1403073540.600 ppb
2014-05-05E1403073670.600 ppb
2014-05-05E1403073550.600 ppb
2014-05-05E1403073440.600 ppb
2014-08-05E1406085983.50 ppb
2014-08-05E1406086065.00 ppb
2014-08-05E1406086074.80 ppb
2014-08-05E1406086044.40 ppb
2014-08-05E1406085993.70 ppb
2014-08-05E1406085972.90 ppb
2014-09-03E1406084162.80 ppb
2014-09-03E1406084212.40 ppb
2014-10-07E1406084174.80 ppb
2014-10-07E1406084203.60 ppb
2014-11-05E1409032371.000 ppb
2014-11-05E1409032320.900 ppb
2014-11-05E1409032242.80 ppb
2014-11-05E1409032231.90 ppb
2014-11-05E1409032271.20 ppb
2014-11-05E1409032280.700 ppb
2014-11-05E140307349ND
2014-11-05E140307348ND
2014-12-01E1306006140.900 ppb
2014-12-01E1410003191.40 ppb
2014-12-01E130600618ND
2014-12-01E130600613ND
2014-12-01E141000325ND
2015-01-05VA010-DCLS5.40 ppb
2015-01-05VA010-DCLS0.900 ppb
2015-02-01VA010-DCLS2.70 ppb
2015-02-01VA010-DCLS2.00 ppb
2015-02-01VA010-DCLS1.80 ppb
2015-02-01VA010-DCLS1.60 ppb
2015-02-01VA010-DCLS1.40 ppb
2015-02-01VA010-DCLS1.40 ppb
2015-03-09VA010-DCLS2.30 ppb
2015-03-09VA010-DCLSND
2015-03-09VA010-DCLSND
2015-04-15VA010-DCLS2.50 ppb
2015-04-15VA010-DCLS0.700 ppb
2015-05-04VA010-DCLS1.30 ppb
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-05-04VA010-DCLSND
2015-08-03VA010-DCLS7.20 ppb
2015-08-03VA010-DCLS5.30 ppb
2015-08-03VA010-DCLS5.20 ppb
2015-08-03VA010-DCLS4.20 ppb
2015-08-03VA010-DCLS3.10 ppb
2015-11-04VA010-DCLS2.30 ppb
2015-11-04VA010-DCLS0.900 ppb
2015-11-04VA010-DCLSND
2015-11-04VA010-DCLSND
2016-02-02E151203194ND
2016-02-02E151203184ND
2016-02-02E151203199ND
2016-02-02E151203192ND
2016-05-04E160303519ND
2016-05-04E160303518ND
2016-05-04E160303507ND
2016-05-04E160303505ND
2016-08-10E1608012345.40 ppb
2016-08-10E1608012361.40 ppb
2016-08-10E1608012370.500 ppb
2016-08-10E160801235ND
2016-08-10E160801241ND
2016-11-02E1608043531.70 ppb
2016-11-02E1608043551.50 ppb
2016-11-02E160804359ND
2016-11-02E160804354ND
2017-02-06E1611034601.60 ppb
2017-02-06E161103451ND
2017-02-06E161103444ND
2017-02-06E161103454ND
2017-05-02E1702031711.40 ppb
2017-05-02E1702031721.10 ppb
2017-05-02E1702031701.10 ppb
2017-05-02E170203178ND
2017-08-01E1706015372.50 ppb
2017-08-01E1706015402.20 ppb
2017-08-01E1706015381.80 ppb
2017-08-01E1706015451.70 ppb
2017-08-01E1706015411.20 ppb
2017-11-07E1709025671.30 ppb
2017-11-07E1709025660.800 ppb
2017-11-07E1709025690.500 ppb
2017-11-07E170902568ND
2018-02-06E1712025392.70 ppb
2018-02-06E1712025417.30 ppb
2018-02-06E1712025434.00 ppb
2018-02-06E1712025452.90 ppb
2018-05-01E1803059540.700 ppb
2018-05-01E180305963ND
2018-05-01E180305965ND
2018-05-01E180305967ND
2018-08-06E180600781ND
2018-08-06E180600789ND
2018-08-06E180600791ND
2018-08-06E1806007930.900 ppb
2018-08-06E180600795ND
2018-11-06E181000958ND
2018-11-06E181000964ND
2018-11-06E181000966ND
2018-11-06E181000968ND
2019-02-05E181202416ND
2019-02-05E181202425ND
2019-02-05E181202426ND
2019-02-05E181202431ND
2019-05-07E1903023540.600 ppb
2019-05-07E190302358ND
2019-05-07E190302360ND
2019-05-07E1903023620.700 ppb
2019-08-05924401780050.753 ppb
2019-08-16L1129188-014.66 ppb
2019-08-16L1129188-022.34 ppb
2019-08-16L1129188-033.10 ppb
2019-08-16L1129188-041.68 ppb
2019-11-0592452346004ND
2019-11-0592452346006ND
2019-11-05924523460093.30 ppb
2019-11-0592452346010ND