There has been a lot of press lately regarding Chrome-Hex in drinking water.  The method cited by the Environmental Working Group for Chrome-Hex can only be achieved by a handful of laboratories on the west coast.  The USEPA monitors Chrome-Hex through the analysis of total Chromium and Suburban Laboratories can analyze total Chromium down to the levels of concern. We are also in the process of developing a Chrome-Hex method similar to the one used in the EWG study.

Environmental Working Group:  Chromium-6 Is Widespread in US Tap Water
EPA Issues Guidance for Enhanced Monitoring of Hexavalent Chromium in Drinking Water

For more information please refer to the links above or contact Suburban Laboratories.