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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Arroyo Grande,Water Department

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

 

114

Samples

0

Samples exceeding legal limit (MCL)

63

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.91 ppb1713ND - 8.60 ppb
20154.50 ppb2517ND - 12.9 ppb
20166.14 ppb16163.00 ppb - 12.3 ppb
20170.544 ppb164ND - 5.00 ppb
20180.750 ppb249ND - 3.60 ppb
20190.444 ppb164ND - 2.20 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

Date Lab ID Result
2014-02-113761-015-10258.60 ppb
2014-02-113761-016-10008.10 ppb
2014-02-113761-017-10135.30 ppb
2014-02-113761-018-09307.90 ppb
2014-03-183761-013-0930ND
2014-05-153761-015-09121.50 ppb
2014-05-153761-016-09302.80 ppb
2014-05-153761-017-08501.50 ppb
2014-05-153761-018-09502.70 ppb
2014-08-193761-015-10101.90 ppb
2014-08-193761-016-09102.80 ppb
2014-08-193761-017-10001.90 ppb
2014-08-193761-018-09453.20 ppb
2014-11-253761-015-1000ND
2014-11-253761-016-0909ND
2014-11-253761-017-0930ND
2014-11-253761-018-08381.30 ppb
2015-02-173761-015-10103.90 ppb
2015-02-173761-016-10454.60 ppb
2015-02-173761-017-09504.30 ppb
2015-02-173761-018-11054.30 ppb
2015-05-123761-015-10302.40 ppb
2015-05-123761-016-09102.40 ppb
2015-05-123761-017-10102.70 ppb
2015-05-123761-018-08552.70 ppb
2015-05-193761-001-0912ND
2015-05-193761-002-0915ND
2015-05-193761-003-0922ND
2015-05-193761-004-0855ND
2015-05-193761-006-0827ND
2015-05-193761-007-0830ND
2015-05-193761-008-1035ND
2015-05-193761-013-1015ND
2015-08-113761-015-10236.50 ppb
2015-08-113761-016-09057.00 ppb
2015-08-113761-017-103812.9 ppb
2015-08-113761-018-105812.8 ppb
2015-08-273761-018-093010.3 ppb
2015-10-273761-015-11119.70 ppb
2015-10-273761-016-10069.80 ppb
2015-10-273761-017-103710.5 ppb
2015-10-273761-018-09065.70 ppb
2016-02-093761-015-10204.50 ppb
2016-02-093761-016-09465.20 ppb
2016-02-093761-017-10035.00 ppb
2016-02-093761-018-09145.40 ppb
2016-05-123761-015-11136.30 ppb
2016-05-123761-016-10355.10 ppb
2016-05-123761-017-11035.00 ppb
2016-05-123761-018-10156.10 ppb
2016-08-093761-015-10283.20 ppb
2016-08-093761-016-09353.00 ppb
2016-08-093761-017-095712.3 ppb
2016-08-093761-018-09079.30 ppb
2016-11-083761-015-08305.00 ppb
2016-11-083761-016-09208.70 ppb
2016-11-083761-017-09003.90 ppb
2016-11-083761-018-101010.3 ppb
2017-02-073761-015-1012ND
2017-02-073761-016-0916ND
2017-02-073761-017-09551.70 ppb
2017-02-073761-018-09005.00 ppb
2017-05-093761-015-0905ND
2017-05-093761-016-1000ND
2017-05-093761-017-1020ND
2017-05-093761-018-0940ND
2017-08-103761-015-0924ND
2017-08-103761-016-1054ND
2017-08-103761-017-11111.000 ppb
2017-08-103761-018-10141.000 ppb
2017-11-073761-015-1103ND
2017-11-073761-016-0737ND
2017-11-073761-017-0754ND
2017-11-073761-018-0723ND
2018-02-083761-015-1000ND
2018-02-083761-016-1030ND
2018-02-083761-017-0910ND
2018-02-083761-018-1100ND
2018-05-083761-001-0950ND
2018-05-083761-002-0850ND
2018-05-083761-003-1010ND
2018-05-083761-004-0818ND
2018-05-083761-006-0910ND
2018-05-083761-007-0930ND
2018-05-083761-008-0940ND
2018-05-083761-013-0850ND
2018-06-213761-015-10001.10 ppb
2018-06-213761-016-09001.90 ppb
2018-06-213761-017-09151.10 ppb
2018-06-213761-018-08411.70 ppb
2018-08-073761-015-1033ND
2018-08-073761-016-09401.20 ppb
2018-08-073761-017-1005ND
2018-08-073761-018-0919ND
2018-10-233761-015-11102.50 ppb
2018-10-233761-016-10503.60 ppb
2018-10-233761-017-09252.40 ppb
2018-10-233761-018-10302.50 ppb
2019-03-143761-015-0920ND
2019-03-143761-016-0945ND
2019-03-143761-017-1015ND
2019-03-143761-018-1040ND
2019-05-143761-015-10151.40 ppb
2019-05-143761-016-10502.20 ppb
2019-05-143761-017-10301.40 ppb
2019-05-143761-018-11102.10 ppb
2019-08-133761-015-0910ND
2019-08-133761-016-1025ND
2019-08-133761-017-0840ND
2019-08-133761-018-1045ND
2019-10-293761-015-1025ND
2019-10-293761-016-0919ND
2019-10-293761-017-1010ND
2019-10-293761-018-0902ND