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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Town of Prosper

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

62

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.08 ppb12121.60 ppb - 14.5 ppb
20152.49 ppb168ND - 6.26 ppb
20160.142 ppb162ND - 1.18 ppb
20173.24 ppb1614ND - 5.49 ppb
20182.12 ppb1612ND - 3.88 ppb
20191.34 ppb1614ND - 2.05 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
2014-04-09Q14112870041.70 ppb
2014-04-09Q141128700314.5 ppb
2014-04-09Q14112870021.60 ppb
2014-04-09Q14112870011.60 ppb
2014-09-15Q14443040043.50 ppb
2014-09-15Q14443040033.70 ppb
2014-09-15Q14443040022.50 ppb
2014-09-15Q14443040013.00 ppb
2014-12-08Q14589070034.20 ppb
2014-12-08Q14589070024.80 ppb
2014-12-08Q14589070044.00 ppb
2014-12-08Q14589070053.90 ppb
2015-02-03Q15040730043.90 ppb
2015-02-03Q15040730033.70 ppb
2015-02-03Q15040730024.40 ppb
2015-02-03Q15040730014.30 ppb
2015-04-29Q15158820045.67 ppb
2015-04-29Q15158820035.82 ppb
2015-04-29Q15158820026.26 ppb
2015-04-29Q15158820015.71 ppb
2015-09-30Q1538587002ND
2015-09-30Q1538587001ND
2015-09-30Q1538587003ND
2015-09-30Q1538587004ND
2015-12-02Q1547915004ND
2015-12-02Q1547915003ND
2015-12-02Q1547915002ND
2015-12-02Q1547915001ND
2016-02-09Q1605592004ND
2016-02-09Q1605592003ND
2016-02-09Q1605592002ND
2016-02-09Q1605592001ND
2016-04-27Q1616621004ND
2016-04-27Q1616621001ND
2016-04-27Q16166210021.09 ppb
2016-04-27Q1616621003ND
2016-09-06Q1635669004ND
2016-09-06Q1635669003ND
2016-09-06Q16356690021.18 ppb
2016-09-06Q1635669001ND
2016-11-01Q1646791003ND
2016-11-01Q1646791005ND
2016-11-01Q1646791002ND
2016-11-01Q1646791004ND
2017-02-07Q1705541004ND
2017-02-07Q1705541003ND
2017-02-07Q17055410021.24 ppb
2017-02-07Q17055410011.27 ppb
2017-05-22Q17206840045.34 ppb
2017-05-22Q17206840035.26 ppb
2017-05-22Q17206840024.42 ppb
2017-05-22Q17206840014.44 ppb
2017-07-27Q17311240044.85 ppb
2017-07-27Q17311240035.49 ppb
2017-07-27Q17311240025.25 ppb
2017-07-27Q17311240015.02 ppb
2017-10-23Q17544480022.40 ppb
2017-10-23Q17544480012.17 ppb
2017-10-23Q17544480042.34 ppb
2017-10-23Q17544480052.37 ppb
2018-02-12Q18059510043.57 ppb
2018-02-12Q18059510033.88 ppb
2018-02-12Q18059510023.61 ppb
2018-02-12Q18059510013.54 ppb
2018-05-16Q18200770022.30 ppb
2018-05-16Q18200770012.39 ppb
2018-05-16Q18200770042.33 ppb
2018-05-16Q18200770032.30 ppb
2018-08-27Q18347040042.60 ppb
2018-08-27Q18347040012.42 ppb
2018-08-27Q18347040032.66 ppb
2018-08-27Q18347040022.39 ppb
2018-11-09Q1845047003ND
2018-11-09Q1845047002ND
2018-11-09Q1845047004ND
2018-11-09Q1845047005ND
2019-02-14Q19070290021.71 ppb
2019-02-14Q19070290011.72 ppb
2019-02-14Q19070290031.76 ppb
2019-02-14Q19070290041.80 ppb
2019-06-21Q19390920041.93 ppb
2019-06-21Q19390920031.81 ppb
2019-06-21Q19390920022.05 ppb
2019-06-21Q19390920011.80 ppb
2019-09-20Q19680310041.09 ppb
2019-09-20Q1968031003ND
2019-09-20Q1968031002ND
2019-09-20Q19680310011.06 ppb
2019-12-04Q19792560031.07 ppb
2019-12-04Q19792560041.25 ppb
2019-12-04Q19792560051.12 ppb
2019-12-04Q19792560021.22 ppb