Other contact information
We're working to continue to reduce odour emissions from the plant, improve monitoring and report data in a preferred format for the community.
With over $10 million invested in odour reduction, see the results from our investments and future odour projects.
Odour at Gold Bar are a natural part of the treatment process; we continue to meet air quality objectives.
View our monthly air quality fenceline monitoring reports and see how annual odour levels have decreased over time.
$10 million in odour mitigation projects has been completed to date at the Gold Bar Wastewater Treatment Plant (WWTP) and has significantly helped reduce odour emissions. Some projects include:
These investments are showing results, and there has been a significant reduction in odours from 2017 to 2018. At the intake part of the plant, in particular, H2S readings are 80% lower than in the previous year.
At the Gold Bar WWTP, we're taking steps to ensure odour levels consistently meet current and future standards and are safe for health and recreation. When it comes to monitoring and reporting odours, we hope to achieve the following:
Additional, continuous air quality monitoring in a place closer to the fenceline;
Real time results that are available in a format that is useful for stakeholders; and
New regulatory monitoring and reporting that gives stakeholders the information they need to assure the air quality is safe for health and recreation.
We'll be carrying out several projects that will further reduce odours coming from Gold Bar WWTP, while also meeting current and future odour level standards:
In coordination with Alberta Environment and Parks, EPCOR is planning to install a new continuous monitoring station between the Gold Bar WWTP and the nearest receptors (homes along 109A Avenue).
We want to hear from you! Where do you think we should install this new air monitoring station?
We believe in listening to and engaging stakeholders. Community input and involvement is an important part of our decision-making and we want to hear what you think about our initiatives.
Our committments to you
Odours sometimes occur at Gold Bar and are a normal part of the treatment process due to the raw wastewater that flows through the plant. Most of these odours are related to hydrogen sulphide gas (H2S). H2S levels around Gold Bar can vary based on plant activities like maintenance work or from changes in water flow due to melting snow or rain. Most odours at Gold Bar come from the preliminary and primary treatment buildings, with some odour coming from the solid treatment buildings.
If you are concerned about odours near
the Gold Bar Wastewater Treatment Plant, contact the City of Edmonton at
311 and leave your contact information.
The City shares these concerns with us
and we will follow up within 24 hours to investigate and address the issue.
The safety of the public and our employees is always our number one priority. We are constantly monitoring air quality levels at Gold Bar to confirm our odour-control systems are working properly.
EPCOR actively measures H2S levels at the plant. We're also members of the Strathcona Industrial Association (SIA), which does environmental monitoring across the region, including ambient air quality. While there are occasional times that H2S levels at the plant exceed
Alberta Ambient Air Quality Objectives (such as during equipment maintenance), our H2S levels are much lower than those that can bring health concerns outlined in OH&S legislation.
If the H2S levels ever exceed the OH&S legislation limits, EPCOR will let you know of any concerns and any precautions you should take. One of the ways we will notify you is our through our
water outages and alerts page. Any
alarms you hear at the Gold Bar plant are specific to onsite workers and don't apply to nearby communities.
Our committments to you
When Gold Bar first opened in 1956, and as the community around the plant grew, there were few reports about oour. Odour reports in the 1980s led to the addition of air collection systems and odour scrubbers which have been relatively effective in controlling and reducing odours from wastewater treatment. However, in late 2014 and into 2015, this changed.
In November 2014 a member of the Nordic Ski Club complained to Alberta Environment about odour from the plant. Alberta Environment conducted air monitoring from February to April 2015 and found that over the 83 days, there were 4 days where H2S levels were over the daily average objective of 3 ppb and 24 of 1,992 hours where levels were over the hourly average objective of 10 ppb.
EPCOR determined that the chemical tanks for the odour scrubbers were failing; they were removed from service for repair in early 2015. This meant more un-scrubbed air was being released, causing more odour problems and complaints while repairs were being made. By late 2015, the repairs were made and the scrubbers returned to full service in January 2016.
As mentioned, EPCOR is a member of the Strathcona Industrial Association (SIA) Ambient Air Monitoring Network. The SIA conducts environmental monitoring across the East Edmonton and Strathcona County region. Their monitoring assesses ambient air quality. There are two monitoring stations near the Gold Bar Wastewater Treatment Plant.
EPCOR consistently monitors 8 locations around the Gold Bar plant fenceline for H2S levels (numbered). The readings at these stations are spot readings which may only exist for a moment in time, so these results are not compared to standards that are quantified in 1-hour, 8-hour or 24-hour averages.
Data from the previous month is posted by the 15th of the following month.
The chart below shows the average H2S levels from spot readings recorded annually at each station.
Average Parts Per Billion (ppb)
EPCOR consistently monitors 8 locations around the Gold Bar plant fence line for H2S levels (numbered). The readings at these stations are spot readings. The air conditions captured in these samples may only exist for a moment in time, so these results are not compared to standards that are quantified in 1-hour, 8-hour or 24-hour averages.
Data from the previous month is posted by the 15th of the following month:
Fenceline H2S Monitoring - January 2019Fenceline H2S Monitoring - December 2018Fenceline H2S Monitoring - November 2018Fenceline H2S Monitoring - October 2018
View the annual reporting that shows the average H2S levels from these spot readings, recorded annually at each station.
Average Parts Per Billion (ppb)