ACRD on Twitter

Whats New

The Draft AV Age-Friendly Plan is available for review by June 3, 2020.
The project to commence May 19th, 2020 through to October, 2020. See notice for more details.

Objectives and Standards for Particulate Matter


Canada-Wide Standards (CWS)

In June, 2000, federal and provincial ministers of the environment declared particulate matter and ozone to be toxic substances and established Canada-Wide Standards (CWS) for both of them as part of a long term goal of minimizing the health risks that these contaminants pose to human health and the environment. These standards represent a balance between achieving the best health and environmental protection possible and the feasibility and costs of reducing the pollutant emissions that contribute to PM and ground-level ozone in ambient air.

To view the full standard

Calculating the CWS PM 2.5 metric for a community is not simple. It requires at least three years of PM 2.5 data. The 30 ug/m3 standard is compared to the rolling average of the 98th percentile daily average value for each year. It is not a true daily standard that can be used for day to day air quality management.

In response to the need for a fine PM standard to address day to day air quality management, the Province adopted the new daily PM2.5 standard of 25 ug/m3 in 2009.


PM 2.5 - 25ug/m3 for a 24 hour averaging time
PM 2.5 - 8ug/m3 for an annual averaging time
PM 2.5 - 6ug/m3 for an annual averaging time planning goal
PM 10 - 50ug/m3 for a 24 hour averaging time.

Provincial PM2.5 Objective

Other Canadian and Provincial standards are found here.