According to a Federal data analysis from an Environmental Working Group study, Chromium 6

aka the ‘Erin Brockovich’ chemical contaminates the water supply of over 200 million Americans

in 50 states. An article written by EWG states that scientists find the carcinogenic Chromium 6

to cause cancer even at extremely low levels of ingestion.

A public health goal of 0.02 Parts Per Billion (ppb) was set by scientists in

California and deemed safe. Unfortunately EWG found that

over two-thirds of the U.S population is being exposed to water with

higher levels of Chromium 6 than 0.02 ppb.

This interactive map from the EWG website could help you discover reported

Chromium 6 levels from your local area.

The Pure Blue H2O NSF Certified 4 Stage Reverse Osmosis System features an

actual average Chromium 6 reduction percentage of 98.5% tested and certified

according to NSF/ANSI Standard 58 by NSF International.

Sources:

http://www.ewg.org/