Fields of Proficiency Testing Table for Non-Potable Water Updated

The TNI PT Board has updated the Fields of Proficiency Testing (FOPT) table for non-potable water by adding low-level concentration analytes for mercury and total residual chlorine.  The new non-potable water table is effective as of January 4, 2010.  The two new analytes will only affect laboratories which are performing low-level measurements for those parameters.