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Salish Sea

Air Quality

Summary

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Improving

13 of the 14 air monitoring stations in our study meet both Canadian and U.S. standards, and air quality is generally improving thanks to new actions in Washington and British Columbia that control sources of air pollution.

Photo of puffy clouds in sky above Salish Sea
Levels of fine particle air pollution - such as those found in smoke and haze - are improving across most of the watershed.

EPA and Environment Canada have set federal air pollution reduction targets for tiny particles of air pollution that are 2.5 micrometers in diameter and smaller (also called PM2.5). These fine particles - such as those found in smoke or haze - are 100 times smaller than the width of a human hair. They can be inhaled deeply into a person's respiratory system and cause severe health problems. They also contribute to poor visibility and can impact the function of the ecosystem.

What's happening?

Levels of fine particulate at 13 of the 14 air monitoring stations shown in the map below meet both the Canada Wide Standard and the U.S. Daily Standard. Levels of fine particulate in south Tacoma exceed the more stringent Canada Wide Standard but meet the U.S. Daily Standard.

12 of the stations showed improving conditions between 2005 and 2011. Fine particulate levels at Bellingham were marginally higher in 2011 than 2005. Higher levels were also observed at Victoria, however this may be partly due to the installation of new instruments that are more sensitive to fine particulates.

  • List of air monitoring station locations

Why is it important?

Elevated levels of fine particulate can affect human health, the environment and the economy. Fine particulates can be inhaled deeply into the respiratory system where they may aggravate existing respiratory and cardiovascular disease, reduce lung function, increase respiratory symptoms, and lead to premature death. Fine particulates may also provide a way for toxics - including carcinogens - to get deep into a person's respiratory system.

Research indicates that fine particulates may affect people's health even at levels below current federal health standards. Negative health effects lead to increased costs to the medical system and are associated with greater numbers of sick days in the work force.

High levels of fine particulates can also impair visibility, which has measureable impacts on tourism and decreases the quality of life for Salish Sea residents.

  • Learn more about why it's important

Why is it happening?

Fine particulates have natural and human-made sources. Primary sources of fine particulates in the Salish Sea ecosystem are transportation (e.g. cars, trucks, trains, ships), and woodstoves and fireplaces, particularly during winter months.

  • Learn more about why it's happening

What are we doing about it?

Agencies are focused on actions to reduce emission sources from the following sources:

  • Locomotives and rail yards
  • Marine vessels and port operations
  • Wood burning
  • Vehicles and non-road engines
  • Learn more about what we're doing

Five things you can do to help!

  1. Walk or ride a bike when possible, or take public transportation.
  2. Ask your energy supplier for a home audit to find ways to help you save energy and money.
  3. Have your gas appliances and heater regularly inspected and maintained.
  4. Turn off office equipment, computers, printers, and fax machines at night or after hours.
  5. During the day open the blinds and turn off the lights. Dress in layers instead of reaching for the thermostat.

Related information

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Scientific references

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  1. Thomson, B. 2004. Characterization of the Georgia Basin Puget Sound Airshed. Environment Canada and United States Environmental Protection Agency.
  2. Bates, D.V., J. Koenig, M. Bauer. 2003. Health and Air Quality 2002 Phase 1 Methods for Estimating and Applying Relationships between Air Pollution and Health Effects (PDF) (133 pp, 2MB). Prepared for British Columbia Lung Association.
  3. Environmental Protection Agency. 2009. Integrated Science Assessment for Particulate Matter. Environmental Protection Agency, Research Triangle Park, NC. EPA/600/R-08/139F.
  4. Grantz, D.A. 2003. Ecological effects of particulate matter. Environment International. 29(2003): 213-239.
  5. CCME, 2000. Canada Wide Standard for PM.
  • More references