Salt Lake City Department of Public Utilities (SLCDPU) is installing a Biofilter at 1020 West Pierpont Avenue to implement odor control and protect underground sewer pipes. Over time, these gases have contributed to unpleasant smells and faster pipe deterioration. The Biofilter will safely remove them, improving conditions for the community and the sewer system.

What is the purpose of a Biofilter?

Hydrogen sulfide (H2S) gas forms naturally as waste breaks down in the sewer. Currently, this gas escapes through maintenance lids and causes strong odors. Hydrogen sulfide can also turn into sulfuric acid, which damages concrete sewer pipes. By filtering this gas, we are:

• Reducing odors in the immediate area
• Preventing pipe corrosion, which could lead to costly and disruptive emergency repairs.

How does it work?

The biofilter uses a biological process in which bacteria grow on a biomat (a plastic media), naturally breaking down sulfur compounds. The system is proven to remove up to 99.5% of hydrogen sulfide. We are also installing carbon filters to capture any remaining traces before air is released. The primary emissions from the process are nitrogen gas, oxygen, and water vapor.

What will the site look like?

Based on community feedback, we have decided to remove the tower component of the facility. This change reduces the maximum height of the structure from approximately 30 feet to 15 feet. The modification will not impact the effectiveness of the odor control system. This change will not have any health impacts, as the primary emissions from the process are nitrogen gas, oxygen, and water vapor.

After construction, we will install water-wise landscaping, including a mix of trees, decorative rock, and gravel to help the facility blend into the environment.

Why this specific location?

After a thorough study, this site was selected because it’s near a major junction where a 66-inch trunk line converges with other pumped lines.

When these lines meet, the water becomes turbulent, releasing hydrogen sulfide. To remove odors, we need to filter the gas where it’s being released.

Schedule

Construction is slated to begin as early as January 2026 and conclude by August 2026.

Project Timeline

• January 5, 2026: On-site neighborhood visit for interested residents (4:00 PM).
• January 15, 2026: Community information meeting at Salt Lake City Public Utilities – West Campus
• ​Months 1-2: Roadway and utilities work. You will see significant activity as we prepare the connection to the 1200 West trunk line.​
• ​Months 3-4: Sitework including site grading, concrete pours, and some landscaping.​
• ​Months 5-6: Installation of biofilter, connection to utilities, finalize landscaping, and system testing and calibration.

Construction Impacts

• Construction activities Monday through Friday between 7am and 5pm.
• Occasional nighttime or weekend construction activities.
• Notification prior to any potential road closures or detours.
• Maintained vehicle access with brief interruptions. Trenches may be plated to provide vehicle access.
• Increased noise and dust should be expected.

Engagement Resources

• Presentation to Poplar Grove Community Council 4/23/2025
• Flyer mailed April 2025

Please contact us directly with any questions or concerns: