Last Update: 04/05/2026 at 2:50 PM EST
Salt Lake City Emissions Decline
Coverage from Phys, Phys.org, and others
Articles
3
Latest Article
04/01
Active Days
1
Executive Summary
Salt Lake City monitoring shows falling NOx, CO and CO2 since 2005 as cleaner vehicles reduce tailpipe pollution and non-traffic sources grow
- NOx, CO and CO2 declined at three Salt Lake City monitoring sites from 2005 to 2023
- The study used continuous measurements from Hawthorne Elementary, the Browning building and Rose Park
- Cleaner vehicles, emissions standards and catalytic converters are linked to lower tailpipe pollution
- Pollution sources are becoming more mixed as non-traffic sources gain share
- Industry, residential heating and off-road equipment now contribute relatively more than before
- Weekday and weekend pollutant ratios have converged, suggesting more non-traffic influence
- Summer data were excluded because tree photosynthesis affected CO2 levels
Quick Facts
- What: Long term trends show declining urban emissions
- Where: Salt Lake City monitoring sites and surrounding neighborhoods
- Why: Cleaner vehicles reduced tailpipe pollution as sources shifted
- Who: John Lin led University of Utah researchers
- When: 2005 to 2023 data period
Featured Article
John Lin and collaborators report declining NOx, CO, and CO2 at three Salt Lake City monitoring sites from 2005 to 2023, with increasing non-traffic source share.
Additional Articles
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John Lin and colleagues report 2005-2023 declines in NOx, CO, and CO2 in Salt Lake City using a multi-site urban air monitoring dataset.
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University of Utah researchers report declining NOx and CO emissions in Salt Lake City since 2005 using multi-site monitoring from 2005-2023.