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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Watauga

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.125 ppb162ND - 1.000 ppb
20150.433 ppb165ND - 2.69 ppb
2016ND160ND
2017ND160ND
2018ND160ND
20190.828 ppb1610ND - 1.79 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
2014-03-12Q14083430041.000 ppb
2014-03-12Q1408343003ND
2014-03-12Q1408343002ND
2014-03-12Q1408343001ND
2014-04-16Q1412264006ND
2014-04-16Q1412264005ND
2014-04-16Q1412264004ND
2014-04-16Q14122640031.000 ppb
2014-08-06Q1434668002ND
2014-08-06Q1434668001ND
2014-08-06Q1434668003ND
2014-08-06Q1434668004ND
2014-10-07Q1451563004ND
2014-10-07Q1451563003ND
2014-10-07Q1451563002ND
2014-10-07Q1451563001ND
2015-02-05Q1504734006ND
2015-02-05Q15047340051.10 ppb
2015-02-05Q15047340041.10 ppb
2015-02-05Q1504734003ND
2015-04-15Q1514286001ND
2015-04-15Q1514286002ND
2015-04-15Q15142860042.69 ppb
2015-04-15Q1514286003ND
2015-08-13Q15321940041.02 ppb
2015-08-13Q15321940031.01 ppb
2015-08-13Q1532194002ND
2015-08-13Q1532194001ND
2015-10-06Q1539088004ND
2015-10-06Q1539088003ND
2015-10-06Q1539088002ND
2015-10-06Q1539088001ND
2016-01-11Q1600754003ND
2016-01-11Q1600754002ND
2016-01-11Q1600754004ND
2016-01-11Q1600754001ND
2016-04-14Q1614903004ND
2016-04-14Q1614903003ND
2016-04-14Q1614903002ND
2016-04-14Q1614903001ND
2016-08-03Q1632201004ND
2016-08-03Q1632201003ND
2016-08-03Q1632201002ND
2016-08-03Q1632201001ND
2016-10-24Q1645414003ND
2016-10-24Q1645414002ND
2016-10-24Q1645414004ND
2016-10-24Q1645414001ND
2017-01-09Q1700753006ND
2017-01-09Q1700753003ND
2017-01-09Q1700753005ND
2017-01-09Q1700753002ND
2017-05-02Q1717942004ND
2017-05-02Q1717942003ND
2017-05-02Q1717942002ND
2017-05-02Q1717942001ND
2017-07-18Q1729487002ND
2017-07-18Q1729487001ND
2017-07-18Q1729487003ND
2017-07-18Q1729487004ND
2017-10-10Q1750669004ND
2017-10-10Q1750669003ND
2017-10-10Q1750669002ND
2017-10-10Q1750669001ND
2018-01-04Q1800441008ND
2018-01-04Q1800441007ND
2018-01-04Q1800441006ND
2018-01-04Q1800441005ND
2018-04-04Q1813842004ND
2018-04-04Q1813842007ND
2018-04-04Q1813842008ND
2018-04-04Q1813842005ND
2018-07-11Q1827288008ND
2018-07-11Q1827288007ND
2018-07-11Q1827288006ND
2018-07-11Q1827288005ND
2018-10-03Q1839509008ND
2018-10-03Q1839509007ND
2018-10-03Q1839509006ND
2018-10-03Q1839509005ND
2019-02-12Q19061670061.08 ppb
2019-02-12Q19061670051.08 ppb
2019-02-12Q1906167007ND
2019-02-12Q1906167008ND
2019-04-01Q1912873008ND
2019-04-01Q1912873007ND
2019-04-01Q1912873006ND
2019-04-01Q1912873005ND
2019-07-16Q19452520081.16 ppb
2019-07-16Q19452520071.22 ppb
2019-07-16Q19452520061.35 ppb
2019-07-16Q19452520051.32 ppb
2019-10-21Q19730870051.38 ppb
2019-10-21Q19730870081.79 ppb
2019-10-21Q19730870071.57 ppb
2019-10-21Q19730870061.30 ppb