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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Olean City

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)

47

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.08 ppb1613ND - 4.40 ppb
20150.772 ppb1612ND - 1.90 ppb
20160.581 ppb167ND - 2.20 ppb
20170.424 ppb167ND - 1.80 ppb
20180.323 ppb164ND - 1.60 ppb
20190.342 ppb165ND - 2.50 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
2014-03-053/14 DBP - LRAA2ND
2014-03-053/14 DBP - LRAA30.740 ppb
2014-03-053/14 DBP - LRAA10.840 ppb
2014-03-053/14 DBP - LRAA40.520 ppb
2014-06-046/14 DBP - LRAA40.880 ppb
2014-06-046/14 DBP - LRAA11.20 ppb
2014-06-046/14 DBP - LRAA31.30 ppb
2014-06-046/14 DBP - LRAA20.780 ppb
2014-09-049/14 DBP - LRAA11.20 ppb
2014-09-049/14 DBP - LRAA42.20 ppb
2014-09-049/14 DBP - LRAA24.40 ppb
2014-09-049/14 DBP - LRAA31.40 ppb
2014-12-02DBP-#1-2014120340.680 ppb
2014-12-02DBP-#2-201412030ND
2014-12-02DBP-#2-201412030ND
2014-12-02DBP-#4-2014120301.10 ppb
2015-03-043/15 DBP - INTER1.000 ppb
2015-03-043/15 DBP - JOHN1.000 ppb
2015-03-043/15 DBP - PLANT0.810 ppb
2015-03-043/15 DBP - HAMPT1.50 ppb
2015-06-036/15 - DBP - LRAND
2015-06-036/15 - DBP - LRA0.850 ppb
2015-06-036/15 - DBP - LRAND
2015-06-036/15 DBP- LRAA2ND
2015-09-159/15 DBP - LRAA41.90 ppb
2015-09-159/15 DBP - LRAA11.20 ppb
2015-09-159/15 DBP - LRAA20.870 ppb
2015-09-159/15 DBP - LRAA31.30 ppb
2015-12-0912/15 DBP- LRAA30.500 ppb
2015-12-0912/15 DBP - LRAA0.640 ppb
2015-12-0912/15 DBP - LRAA0.780 ppb
2015-12-0912/15 - DBP - LRND
2016-03-083/16 DBP201603090.920 ppb
2016-03-083/16 DBP-2016030ND
2016-03-083/16-DBP20160309ND
2016-03-083/16 DBP20160309ND
2016-06-086/16 DBP201606092.00 ppb
2016-06-082016 DBP201606091.10 ppb
2016-06-086/16 DBP20160609ND
2016-06-086/16 DBP20160609ND
2016-09-069/16 DBP20160907ND
2016-09-069/16 DBP201609072.20 ppb
2016-09-069/16 DBP201609070.920 ppb
2016-09-069/16 DBP201609071.20 ppb
2016-12-052016DBP201612061ND
2016-12-0512/16DBP20161206ND
2016-12-0512/16DBP20161206ND
2016-12-0512/16DBP201612060.960 ppb
2017-03-072017030805670.940 ppb
2017-03-072017030805680.740 ppb
2017-03-072017030805661.10 ppb
2017-06-077020781004ND
2017-06-0770207810020.640 ppb
2017-06-077020781001ND
2017-06-07201703080569ND
2017-06-077020781003ND
2017-09-0570289610071.80 ppb
2017-09-0570289610061.000 ppb
2017-09-057028961009ND
2017-09-057028961008ND
2017-12-047037141003ND
2017-12-0470371410020.570 ppb
2017-12-047037141001ND
2017-12-047037141004ND
2018-03-067044699004ND
2018-03-077044699002ND
2018-03-077044699001ND
2018-03-077044699003ND
2018-06-067054088003ND
2018-06-067054088001ND
2018-06-067054088004ND
2018-06-067054088002ND
2018-09-137064830008ND
2018-09-1370648300070.970 ppb
2018-09-137064830009ND
2018-09-137064830006ND
2018-12-0470728780021.30 ppb
2018-12-047072878004ND
2018-12-0470728780011.60 ppb
2018-12-0470728780031.30 ppb
2019-03-067081642013ND
2019-03-067081642014ND
2019-03-067081642012ND
2019-03-067081642011ND
2019-06-0470921460020.590 ppb
2019-06-0470921460010.620 ppb
2019-06-047092133001ND
2019-06-047092146003ND
2019-09-1670105189003ND
2019-09-1670105189004ND
2019-09-16701051890.900 ppb
2019-09-16701051890022.50 ppb
2019-12-0370114211001ND
2019-12-0370114211003ND
2019-12-03701142110020.860 ppb
2019-12-0370114211004ND