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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Wilson County Rural Water District 1

NOTE: Wilson County Rural Water District 1 purchases water from Public Wholesale Water Supply District 23 which is required to test for bromoform. Sample information shown below was taken by Public Wholesale Water Supply District 23.

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.600 ppb42ND - 1.40 ppb
20130.667 ppb31ND - 2.00 ppb
2014ND20ND
20151.05 ppb43ND - 1.60 ppb
20160.138 ppb41ND - 0.550 ppb
20171.03 ppb43ND - 2.10 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

NOTE: Wilson County Rural Water District 1 purchases water from Public Wholesale Water Supply District 23 which is required to test for bromoform. Sample information shown below was taken by Public Wholesale Water Supply District 23.

Date Lab ID Result
2012-01-09572230TFND
2012-04-02577003TFND
2012-07-09581145TF1.40 ppb
2012-11-12587871TF1.000 ppb
2013-01-07589238TF2.00 ppb
2013-04-03594341TFND
2013-07-08598185TFND
2014-07-14152292ND
2015-07-21371026ND
2016-02-234979240.800 ppb
2016-04-185304712.40 ppb
2016-08-226080530.560 ppb
2016-10-03635638ND
2017-03-136800731.30 ppb
2017-05-02750488ND
2017-07-318092752.80 ppb