Our water quality standards exceed those set in our Approval to Operate or in the Health Canada Guidelines for Canadian Drinking Water Quality. To ensure that we continue to meet or exceed standards for the system, we have several programs in place. The Water Quality Index measures the number of treated water tests conducted that meet our internal water quality standards. In 2017, the Water Quality Index score was 99.84% (59,821 out of a total of 59,915 tests passed our internal quality standards).
Spring run-off conditions can result in an increase in the turbidity, colour, taste and odour of the raw water supply drawn from the North Saskatchwan River. Our treatment plants increase adjust their mode of operations during this time to control these conditions. Each year, we also recruit a panel of Edmonton customers to participate in our Home Sniffing Program, which measures the effectiveness of our spring runoff water treatment strategy. These customers rate the odour of the treated water from the hot and cold taps in their home. The overall Customer Satisfaction Rating for the Home Sniffing program was 94.46% in 2017, which means the majority of customers rated the odour as 0.5 or less on a scale of 1 to 3.
In addition to the Water Quality Index and the Home Sniffing Customer Satisfaction Rating, we strive to meet other requirements set by the City of Edmonton Performance Based Regulation. These measures ensure we maintain performance with regards to the reliability of the system, the water quality, customer service, the environment and safety.