Adverse Water Quality Incidents


Measure the effectiveness of Hamilton Water’s treatment systems for the provision of clean, safe drinking water.  Standards for drinking water quality are set and enforced by the Safe Water Drinking Act. The City of Hamilton’s drinking water regularly meets all Ontario Drinking Water Standards. Water samples are collected seven days a week from approximately 106 locations.

Story behind the numbers

The current target for adverse water quality incidents is 0. This indicator is influenced by seasonality, external service levels and other factors such as inclement weather and construction activity.

Performance improvements

Hamilton Water has a number of initiatives to ensure requirements are met. These include:

  • Optimization of the water distribution sampling and testing program to meet and exceed the Ontario Drinking Water Standards
  • Development of an Asset Management Plan to rehabilitate and replace aging infrastructure.

Previous years, 12 months data. 2017 data from January to September.

Adverse Water Quality Incidents

Year Status Q1 Q2 Q3 Q4 Total
2015 Confirmed   4 2 0 6
2015 Unconfirmed 1   2 1 4
2016 Confirmed 0 1 1 3 5
2016 Unconfirmed       1 1
2017 Confirmed 0 0 1 0 1
2017 Unconfirmed   1 2   3
Total           20