EWG's Tap Water Database — 2021 UPDATE



Daviess County Public Water Supply District 2

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20141.41 ppb11110.610 ppb - 2.35 ppb
20151.60 ppb880.540 ppb - 3.07 ppb
20161.70 ppb87ND - 3.22 ppb
20171.63 ppb87ND - 3.12 ppb
20182.32 ppb65ND - 5.57 ppb
20193.35 ppb21ND - 6.69 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
2014-03-19AC166810.610 ppb
2014-03-19AC166820.640 ppb
2014-03-21AC166831.45 ppb
2014-03-21AC166841.39 ppb
2014-06-11AC289892.35 ppb
2014-06-11AC289902.06 ppb
2014-06-11AC289880.870 ppb
2014-06-11AC289870.860 ppb
2014-09-09AC306172.26 ppb
2014-10-21AC376432.12 ppb
2014-10-21AC376440.850 ppb
2015-03-09AC403680.560 ppb
2015-03-09AC403672.04 ppb
2015-04-26AC450372.50 ppb
2015-04-26AC450380.560 ppb
2015-07-20AC542713.07 ppb
2015-07-20AC542700.600 ppb
2015-10-21AC612000.540 ppb
2015-10-21AC611992.92 ppb
2016-01-25AC650062.07 ppb
2016-05-16AC693660.720 ppb
2016-05-16AC693653.22 ppb
2016-08-22AC796950.830 ppb
2016-08-22AC796943.06 ppb
2016-11-16AC862740.780 ppb
2016-11-16AC862732.91 ppb
2017-02-06AC890840.640 ppb
2017-02-06AC890832.37 ppb
2017-04-27AC944452.63 ppb
2017-09-05AD013830.870 ppb
2017-09-05AD013823.12 ppb
2017-11-14AD078821.05 ppb
2017-11-14AD078812.36 ppb
2018-03-07AD113232.06 ppb
2018-08-07AD179965.57 ppb
2018-08-07AD179970.570 ppb
2018-08-07AD291595.08 ppb
2018-08-07AD291600.650 ppb
2019-09-16AD517776.69 ppb