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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Longton, City of

NOTE: Longton, City of purchases water from Chautauqua County Rural Water District 4 which is required to test for bromoform. Sample information shown below was taken by Chautauqua County Rural Water District 4.

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

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND10ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND30ND

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

NOTE: Longton, City of purchases water from Chautauqua County Rural Water District 4 which is required to test for bromoform. Sample information shown below was taken by Chautauqua County Rural Water District 4.

Date Lab ID Result
2014-10-29221600ND
2015-09-27413387ND
2016-09-26630621ND
2017-01-30680178ND
2017-04-05734714ND
2017-07-25803948ND
2017-10-24866820ND
2018-03-20938377ND
2018-04-30938378ND
2018-07-231010144ND
2018-10-311068352ND
2019-03-271139492ND
2019-06-261192046ND
2019-09-251247808ND
2019-12-171291362ND