Full Description

The first water security pilot was deployed in Cincinnati in collaboration with theGreater Cincinnati Water Works (GCWW). The CANARY event detection software,developed by Sandia National Laboratories in cooperation with the U.S. Environmental Protection Agency's (USEPA's) NationalHomeland Security Research Center, has been in use at GCWW since October 2007.CANARY monitors data from 17 water quality monitoring stations throughout theGCWW distribution system that measure standard water parameters including chlorine, total organic carbon (TOC), pH, ORP, conductivity, turbidity, and temperature. In the first several months CANARY was deployed, over ten alarms per day were produced across the system. This excessive false alarm rate was deemed unacceptable due to the time and resources required to investigate each alarm. Through a systematic and thorough analysis of the entire water quality monitoring system and collaborationamong USEPA, GCWW, and CANARY developers, the alarm rate has been drastically decreased to one alarm every 3 to 4 days. The main causes of the CANARY alarms are discussed below, along with ways that these issues have been addressed. Note that these efforts were able to reduce false alarm rates by more than an order of magnitude. Includes 3 references, figures.

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Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 6File Size: 1 file , 770 KB