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News from GPAZ June 2018

Clean Air Day

The GPAZ communications committee recently organized a television appearance to promote Clean Air Day.

Click here to watch the interview segment on CTV Regina.

If you would like to keep up on our promotion and engagement activities, please visit and "like" our Facebook page 
Great Plains Air Zone - GPAZ
Members of the Great Plains Air Zone

Thank you to the GPAZ members for the 2017- 2018 fiscal year.
Click on the name of any organization below to learn more.

Consumer's Co-operative Refineries Limited
Evraz Inc. North America Canada
General Scrap Partnership
K & S Potash Canada GP 
Louis Dreyfus Company Yorkton Production ULC 
The Lung Association, Saskatchewan
Gibson Energy
Mosaic Canada ULC 
City of Regina
Saskatchewan Eco Network
Saskatchewan Ministry of Environment
Terra Grain Fuels Inc. 
TransCanada Corporation 
TransGas Limited
Yara Belle Plaine Inc. 
City of Yorkton
Sask Eco Network

Please contact us if you're interested in becoming a member.

The 2018 GPAZ Annual General Meeting will be held on Wednesday, August 15, 2018. All members are encouraged to attend in order to learn more about the recent work of GPAZ, and vote on resolutions and board appointments.
If you are a current member of GPAZ, you will soon receive a full AGM package by email including:
  • the meeting agenda
  • minutes of the last AGM
  • list of proposed resolutions
If you are not currently a member of GPAZ, but are curious about becoming one, the AGM is a great opportunity to come meet many of the people involved. You can RSVP to
Notice of GPAZ 2018 Annual General Meeting

Wednesday, August 15, 2018 - 8:15am - 11:30am
Co-op Refinery Business Office Boardroom - 580 Park St. Regina

Please contact us if you would like to join by teleconference. 
Air quality study in Yorkton  
The Great Plains Air Zone continuously monitors air within the geographic boundaries of our area.  One of the monitoring stations is located in Yorkton, Saskatchewan where GPAZ has been collecting air quality data and making it public on our website since May 2017. Periodically, we have detected levels of Hydrogen sulfide (H2S) that are above the air quality objective, which is approximately .011 parts per million (ppm). At this level, people may notice an unpleasant smell but risks to health don't come until a much higher level is reached, near 1 part per million (ppm) (which is almost 1000 times higher than the readings collected in Yorkton). Even though there is not a risk to human health in Yorkton, GPAZ and the Ministry of Environment conducted a study in the summer of 2017 to better understand the readings and to locate sources of Hydrogen Sulfide emissions near the city.

This is a map of the area North West of Yorkton, Saskatchewan. The dots are study locations. 

In the summer of 2017, the Great Plains Air Zone and Saskatchewan Ministry of Environment cooperated to monitor and interpret air quality data from the Yorkton area.  Continuous air quality monitoring for significant air pollutants is being collected 365 days a year by the Great Plains Air Zone and communicated the the public on its website
During calm evenings Hydrogen sulfide (H2S) levels reached or exceeded the Saskatchewan ambient air quality objective a number of times at an amount that resulted in increased unpleasant odours but not health concerns.  As a result of this information the Saskatchewan Ministry of Environment conducted continuous monitoring from June 14 to August 30th and more focused mobile monitoring for H2S on August 29th/30th.  The ambient air quality standard for H2S was exceeded at a level that would cause unpleasant odours, but not negative health effects.
Based on the measurements taken at the continuous stationary sites and using mobile monitoring, it appears that H2S is coming from a number of natural sloughs as well as from an industrial area of Yorkton.  When the weather conditions are just right (calm winds, evening inversion conditions) the combined levels can reach a level that is above the standard of .011 parts per million (ppm).  At this level, it may result in an increase in people noticing unpleasant odours but it is not a level that would start to cause health impacts, which is 1 part per million (ppm). For more information on the safe levels of exposure to H2S, please click here:  Sloughs are a source of H2S because it is created when vegetation rots where there is no air. As plants rot underwater, H2S is released. 

2017 GPAZ Annual Report

The Great Plains Air Zone annual air monitoring report will soon be available for download with all other reports on our website, or by clicking here.  The reports are published annually and contains a summary of the activities of GPAZ, including air monitoring data, for each calendar year.

Future GPAZ Meetings

The Great Plains Air Zone is a non-profit organization of public, industry, government, and non-government members. Members of GPAZ meet regularly at board and committee meetings. New members are always welcome. 

The Board meets quarterly. Board current focus: Governance and staffing, membership development, financial management, communications, networking and discussion of regulations. 
Tentative meeting schedule:
  • August 15, 2018
  • November 14, 2018
The Science committee meets every two months. Current focus: Current and future air monitoring. Long range plan for air monitoring in the Zone. 
Tentative meeting schedule:
  • August 08, 2018
  • October 10, 2018
  • December 12, 2018
The communications and engagement committee meets every two months. Current focus: Developing communications objectives and an implementation plan. Tentative meeting schedule:
  • September 11, 2018
  • November 13, 2018
GPAZ is on Facebook and Twitter! Follow us to keep up to date on our work and air quality issues

Contact us

Stephen Weiss, Executive Director  
Mobile: 306-537-5050    
Victoria Square P.O. Box 32146 Regina, SK  S4N 7L2

Great Plains Air Zone
Copyright © 2018 Great Plains Air Zone, All rights reserved.

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