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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Atascadero Mutual Water Company

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

 

159

Samples

0

Samples exceeding legal limit (MCL)

127

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20144.39 ppb1918ND - 7.80 ppb
20154.72 ppb2624ND - 7.40 ppb
20163.14 ppb3724ND - 9.00 ppb
20175.03 ppb2019ND - 6.60 ppb
20184.37 ppb2018ND - 7.40 ppb
20193.44 ppb3724ND - 7.80 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
2014-02-063761-055-08404.60 ppb
2014-02-063761-056-09507.00 ppb
2014-02-063761-057-08007.80 ppb
2014-02-063761-058-08303.50 ppb
2014-02-063761-059-09004.00 ppb
2014-02-063761-060-09255.80 ppb
2014-05-063761-055-09123.20 ppb
2014-05-063761-056-08076.30 ppb
2014-05-063761-057-09417.40 ppb
2014-05-063761-058-09004.40 ppb
2014-05-063761-059-09254.00 ppb
2014-05-063761-060-08285.40 ppb
2014-05-083761-042-1030ND
2014-08-073761-055-08402.10 ppb
2014-08-073761-056-10254.20 ppb
2014-08-073761-057-07504.20 ppb
2014-08-073761-058-09122.50 ppb
2014-08-073761-059-09352.90 ppb
2014-08-073761-060-10024.20 ppb
2015-02-053761-055-09416.30 ppb
2015-02-053761-056-08157.40 ppb
2015-02-053761-057-10186.40 ppb
2015-02-053761-058-09165.40 ppb
2015-02-053761-059-09554.70 ppb
2015-02-053761-060-08427.00 ppb
2015-05-073761-055-08402.10 ppb
2015-05-073761-056-09154.10 ppb
2015-05-073761-057-08005.40 ppb
2015-05-073761-058-08252.60 ppb
2015-05-073761-059-08552.50 ppb
2015-05-073761-060-09304.80 ppb
2015-06-043761-020-0845ND
2015-08-063761-055-09085.60 ppb
2015-08-063761-056-08026.70 ppb
2015-08-063761-057-09446.70 ppb
2015-08-063761-058-08556.40 ppb
2015-08-063761-059-09265.20 ppb
2015-08-063761-060-08246.20 ppb
2015-09-033761-016-0845ND
2015-11-103761-055-09102.80 ppb
2015-11-103761-056-08365.10 ppb
2015-11-103761-057-10106.00 ppb
2015-11-103761-058-09354.70 ppb
2015-11-103761-059-09523.30 ppb
2015-11-103761-060-08105.30 ppb
2016-02-113761-023-0840ND
2016-02-113761-044-1012ND
2016-02-113761-055-09092.00 ppb
2016-02-113761-056-08092.30 ppb
2016-02-113761-057-09403.00 ppb
2016-02-113761-058-08572.20 ppb
2016-02-113761-059-09231.80 ppb
2016-02-113761-060-08272.30 ppb
2016-04-283761-001-1010ND
2016-04-283761-015-0920ND
2016-04-283761-050-0910ND
2016-05-033761-006-0915ND
2016-05-103761-055-08255.10 ppb
2016-05-103761-056-09459.00 ppb
2016-05-103761-057-07559.00 ppb
2016-05-103761-058-08406.00 ppb
2016-05-103761-059-08555.80 ppb
2016-05-103761-060-09256.00 ppb
2016-07-053761-007-1030ND
2016-07-053761-012-0820ND
2016-07-053761-018-0840ND
2016-07-283761-009-0750ND
2016-07-283761-040-0805ND
2016-07-283761-053-0825ND
2016-07-283761-054-0845ND
2016-08-093761-055-08553.10 ppb
2016-08-093761-056-07505.80 ppb
2016-08-093761-057-09305.30 ppb
2016-08-093761-058-08453.10 ppb
2016-08-093761-059-09103.50 ppb
2016-08-093761-060-08104.60 ppb
2016-11-103761-055-08505.00 ppb
2016-11-103761-056-09307.40 ppb
2016-11-103761-057-07507.00 ppb
2016-11-103761-058-08005.60 ppb
2016-11-103761-059-09104.60 ppb
2016-11-103761-060-10106.60 ppb
2017-02-093761-055-08554.10 ppb
2017-02-093761-056-09405.30 ppb
2017-02-093761-057-08205.90 ppb
2017-02-093761-058-08455.50 ppb
2017-02-093761-059-09155.80 ppb
2017-02-093761-060-10004.70 ppb
2017-05-093761-055-09036.10 ppb
2017-05-093761-056-07486.10 ppb
2017-05-093761-057-09246.20 ppb
2017-05-093761-058-08515.30 ppb
2017-05-093761-059-08346.60 ppb
2017-05-093761-060-08084.70 ppb
2017-05-163761-042-1005ND
2017-09-053761-059-09202.60 ppb
2017-11-073761-055-09064.50 ppb
2017-11-073761-056-08055.90 ppb
2017-11-073761-057-09366.50 ppb
2017-11-073761-058-08494.50 ppb
2017-11-073761-059-09194.80 ppb
2017-11-073761-060-08215.50 ppb
2018-02-083761-055-08403.90 ppb
2018-02-083761-056-09155.70 ppb
2018-02-083761-057-08355.60 ppb
2018-02-083761-058-08304.00 ppb
2018-02-083761-059-08554.30 ppb
2018-02-083761-060-09305.60 ppb
2018-06-073761-020-1015ND
2018-08-073761-055-09104.90 ppb
2018-08-073761-056-08407.40 ppb
2018-08-073761-057-10046.60 ppb
2018-08-073761-058-09285.00 ppb
2018-08-073761-059-09435.00 ppb
2018-08-073761-060-08106.40 ppb
2018-09-133761-016-0850ND
2018-11-083761-055-09202.90 ppb
2018-11-083761-056-08105.20 ppb
2018-11-083761-057-10104.40 ppb
2018-11-083761-058-09352.70 ppb
2018-11-083761-059-09523.20 ppb
2018-11-083761-060-08404.50 ppb
2019-02-073761-055-09044.40 ppb
2019-02-073761-056-08054.80 ppb
2019-02-073761-057-09335.00 ppb
2019-02-073761-058-08524.50 ppb
2019-02-073761-059-09154.60 ppb
2019-02-073761-060-08225.40 ppb
2019-02-123761-023-0900ND
2019-02-143761-044-0948ND
2019-04-163761-001-0900ND
2019-04-163761-015-0845ND
2019-05-073761-055-09404.30 ppb
2019-05-073761-056-10205.30 ppb
2019-05-073761-057-09104.50 ppb
2019-05-073761-058-09304.70 ppb
2019-05-073761-059-09555.00 ppb
2019-05-073761-060-10305.70 ppb
2019-05-093761-006-0835ND
2019-05-163761-050-0755ND
2019-07-183761-007-0950ND
2019-07-183761-009-0835ND
2019-07-183761-012-1018ND
2019-07-183761-018-1010ND
2019-07-183761-040-0940ND
2019-07-183761-053-0905ND
2019-07-183761-054-0930ND
2019-08-063761-055-09346.90 ppb
2019-08-063761-056-07587.80 ppb
2019-08-063761-057-10154.90 ppb
2019-08-063761-058-09103.30 ppb
2019-08-063761-059-09553.80 ppb
2019-08-063761-060-08324.80 ppb
2019-11-143761-055-09175.50 ppb
2019-11-143761-056-08146.70 ppb
2019-11-143761-057-09497.20 ppb
2019-11-143761-058-09035.60 ppb
2019-11-143761-059-09305.10 ppb
2019-11-143761-060-08337.40 ppb