Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromoform

Manville WSC

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

 

138

Samples

0

Samples exceeding legal limit (MCL)

92

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20144.12 ppb2018ND - 14.6 ppb
20152.08 ppb2618ND - 8.70 ppb
20161.08 ppb238ND - 10.00 ppb
20171.76 ppb2314ND - 8.20 ppb
20182.00 ppb2315ND - 6.50 ppb
20193.49 ppb2319ND - 10.8 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
2014-03-11AC46497ND
2014-03-11AC464623.10 ppb
2014-03-11AC464631.20 ppb
2014-03-11AC464613.10 ppb
2014-03-11AC464643.40 ppb
2014-06-18AC573026.30 ppb
2014-06-18AC5735814.6 ppb
2014-06-18AC5735711.4 ppb
2014-06-18AC573599.30 ppb
2014-06-18AC573562.20 ppb
2014-06-18AC572987.40 ppb
2014-06-18AC573001.50 ppb
2014-09-12AC66802ND
2014-09-12AC668041.30 ppb
2014-09-12AC668051.40 ppb
2014-09-12AC668031.30 ppb
2014-11-24AC727414.10 ppb
2014-11-24AC727754.30 ppb
2014-11-24AC727713.20 ppb
2014-11-24AC727723.30 ppb
2015-03-19AC853574.10 ppb
2015-03-19AC853678.70 ppb
2015-03-19AC85369ND
2015-03-19AC853512.20 ppb
2015-03-19AC853652.40 ppb
2015-03-19AC852651.10 ppb
2015-03-19AC852851.000 ppb
2015-03-19AC852631.20 ppb
2015-03-19AC85267ND
2015-05-26AC933106.60 ppb
2015-05-26AC933081.20 ppb
2015-05-26AC933124.90 ppb
2015-05-26AC93256ND
2015-05-26AC93261ND
2015-05-26AC93254ND
2015-05-26AC93257ND
2015-08-17AD042612.40 ppb
2015-08-17AD04262ND
2015-08-17AD042651.000 ppb
2015-08-17AD04258ND
2015-09-29AD090092.30 ppb
2015-11-18AD139973.00 ppb
2015-11-18AD139913.60 ppb
2015-11-18AD139943.00 ppb
2015-11-18AD139952.60 ppb
2015-11-18AD140272.80 ppb
2016-02-08AD224192.00 ppb
2016-02-08AD22399ND
2016-02-08AD22420ND
2016-02-08AD22418ND
2016-04-25AD340171.10 ppb
2016-04-25AD340191.40 ppb
2016-04-25AD340153.50 ppb
2016-04-25AD3401310.00 ppb
2016-04-25AD340212.10 ppb
2016-04-25AD340233.50 ppb
2016-04-25AD33948ND
2016-04-25AD33949ND
2016-04-25AD33945ND
2016-04-25AD33944ND
2016-07-25AD45414ND
2016-07-25AD45411ND
2016-07-25AD454201.30 ppb
2016-07-25AD45416ND
2016-11-09AD57440ND
2016-11-09AD57368ND
2016-11-09AD57367ND
2016-11-09AD57355ND
2016-11-09AD57364ND
2017-01-23AD660928.20 ppb
2017-01-23AD660902.10 ppb
2017-01-23AD660944.60 ppb
2017-01-23AD660314.00 ppb
2017-01-23AD660332.50 ppb
2017-01-23AD660354.30 ppb
2017-01-23AD660323.70 ppb
2017-04-27AD81512ND
2017-04-27AD815141.50 ppb
2017-04-27AD81518ND
2017-04-27AD81516ND
2017-04-27AD815011.70 ppb
2017-04-27AD81498ND
2017-04-27AD815001.20 ppb
2017-04-27AD815021.80 ppb
2017-08-17AD93386ND
2017-08-17AD93390ND
2017-08-17AD93388ND
2017-08-17AD93389ND
2017-10-27AE023982.00 ppb
2017-10-27AE024051.50 ppb
2017-10-27AE024041.30 ppb
2017-10-27AE02406ND
2018-02-01AE118891.90 ppb
2018-02-01AE118931.20 ppb
2018-02-01AE118872.50 ppb
2018-02-01AE118812.80 ppb
2018-02-01AE118954.80 ppb
2018-02-01AE118852.20 ppb
2018-02-01AE118834.70 ppb
2018-02-01AE11826ND
2018-02-01AE118241.60 ppb
2018-02-01AE118231.70 ppb
2018-02-01AE118251.30 ppb
2018-04-04AE211853.10 ppb
2018-04-04AE211885.30 ppb
2018-04-04AE211875.30 ppb
2018-04-04AE211956.50 ppb
2018-08-27AE38746ND
2018-09-24AE41269ND
2018-09-24AE41271ND
2018-09-24AE41266ND
2018-11-09AE457341.20 ppb
2018-11-09AE45735ND
2018-11-27AE46990ND
2018-11-27AE46984ND
2019-02-06AE531863.90 ppb
2019-02-06AE531802.60 ppb
2019-02-06AE531823.10 ppb
2019-02-06AE531841.80 ppb
2019-02-06AE531882.20 ppb
2019-02-06AE53118ND
2019-02-06AE53117ND
2019-02-06AE53119ND
2019-02-06AE53116ND
2019-06-06AE694201.10 ppb
2019-06-06AE694221.50 ppb
2019-06-06AE694181.20 ppb
2019-06-06AE694191.40 ppb
2019-09-12AE832443.90 ppb
2019-09-12AE8319010.8 ppb
2019-09-12AE831888.30 ppb
2019-09-12AE831899.60 ppb
2019-09-12AE831879.60 ppb
2019-09-30AE851252.60 ppb
2019-12-03AE909853.80 ppb
2019-12-03AE909864.10 ppb
2019-12-03AE909824.40 ppb
2019-12-03AE909834.30 ppb