Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Water Supply/Drinking Water PTs

Also referred to as Potable Water or Water Supply samples. These samples are produced in lower ranges that mimic the levels that are common to drinking water samples.