Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromoform

Panora Water Works

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.

 

52

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND80ND
2016ND80ND
2017ND80ND
20182.03 ppb84ND - 5.10 ppb
20191.79 ppb87ND - 4.10 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
2014-01-072028321ND
2014-01-072028322ND
2014-01-072028323ND
2014-01-072028324ND
2014-04-072043810ND
2014-04-072043811ND
2014-04-072043812ND
2014-04-072043813ND
2014-07-082061255ND
2014-07-082061256ND
2014-10-082085097ND
2014-10-082085096ND
2015-01-08OE209108ND
2015-01-08OE209109ND
2015-04-06OE227641ND
2015-04-06OE227642ND
2015-07-07OE263933ND
2015-07-07OE263934ND
2015-10-06OE302471ND
2015-10-06OE302472ND
2016-01-11OE334050ND
2016-01-11OE334051ND
2016-04-06OE362513ND
2016-04-06OE362514ND
2016-07-05OE396565ND
2016-07-05OE396566ND
2016-10-06OE437574ND
2016-10-06OE437575ND
2017-01-11OE469500ND
2017-01-11OE469499ND
2017-04-04OE497653ND
2017-04-04OE497652ND
2017-07-11OE535122ND
2017-07-11OE535121ND
2017-10-02OE572425ND
2017-10-02OE572426ND
2018-01-08OE608055ND
2018-01-08OE608054ND
2018-04-11OE643963ND
2018-04-11OE643964ND
2018-07-09OE6799904.50 ppb
2018-07-09OE6799914.70 ppb
2018-10-08OE7244705.10 ppb
2018-10-08OE7244711.90 ppb
2019-01-07OE7568654.10 ppb
2019-01-07OE7568661.90 ppb
2019-04-03OE7892050.600 ppb
2019-04-03OE7892062.20 ppb
2019-07-15OE8344291.30 ppb
2019-07-15OE834430ND
2019-10-08OE8762063.10 ppb
2019-10-08OE8762051.10 ppb