EWG's Tap Water Database — 2019 UPDATE


Dibromoacetic acid

Mountain Park Public Works Authority

Dibromoacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids 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
201224.8 ppb4421.0 ppb - 31.3 ppb
20135.75 ppb115.75 ppb
201429.0 ppb43ND - 66.2 ppb
201529.7 ppb4411.3 ppb - 47.4 ppb
201622.5 ppb4411.4 ppb - 29.2 ppb
201728.7 ppb4422.7 ppb - 37.4 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2013-11-1212558905.75 ppb
2014-02-10127685918.6 ppb
2014-05-19130284666.2 ppb
2014-11-10134895831.2 ppb
2015-02-09137158032.7 ppb
2015-05-11139406047.4 ppb
2015-08-24142156611.3 ppb
2015-11-09144246027.5 ppb
2016-02-08146573226.0 ppb
2016-05-2310386880423.5 ppb
2016-08-1510658530411.4 ppb
2016-11-2111051630429.2 ppb
2017-02-0611235510425.8 ppb
2017-05-1511528760428.9 ppb
2017-08-0711810150437.4 ppb
2017-11-0612116470422.7 ppb