Chromium +6 is a hot topic today with environmental watch dogs publishing data regarding 30+ cities exceeding the allowable limits.
Waterline has issued a Sales Bulletin to help one make the right decisions for their drinking water concerns.
Waterline Technology Sales Bulletin: Chromium 6 - 12/22/2010
When researching this issue, the US EPA is the governing body for the Safe Drinking Water Act (SDWA), it is best to use their data for sales marketing treatment positions on this issue. Below is the link to their site and excerpts as well as our take on the issue.
Here are a couple of excerpts from this site for your review:
EPA Treatment Recommendations: The following treatment method(s) have proven
to be effective for removing chromium (total) to below 0.1 mg/L or 100 ppb:
coagulation/filtration, ion exchange, reverse osmosis, lime softening.
Waterline's current recommendation for treatment will be:
Additional Research Source of Dietary Uses of Chromium reference link: (note: not Chromium 6) http://www.umm.edu/altmed/articles/chromium-000294.htm