Dinosaur, Colorado Air Quality
Dinosaur has a median AQI of 42, earning an air quality grade of A- — excellent air quality that ranks better than 49% of US cities. Air quality has remained relatively stable over the past decade. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2018, Dinosaur recorded 262 good air quality days (79% of monitored days) and 1 unhealthy days.
Population: 507 • County: Moffat
Current AQI
Quick Facts
| Current AQI | 5 — Good |
| Air Quality Grade | A- |
| Median AQI (2018) | 42 |
| vs. U.S. Cities | Better than 49% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 1 |
| 10-Year Trend | → Stable |
| Data Source | EPA AQS (historical) · AirNow (live) |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Dinosaur is sourced from the Vernal #4 monitoring area, located approximately 33 miles from city center. This EPA-certified station continuously tracks ground-level ozone, the primary driver of air quality alerts in this area.
Dinosaur has relatively consistent air quality throughout the year without a strong seasonal peak. Air quality is primarily influenced by local traffic, industrial activity, and regional weather patterns rather than a single seasonal driver.
AQI Trend (10 Years)
Air Quality Days by Year
Dinosaur Median AQI by Year
Annual EPA air quality data for Dinosaur — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2018 | 42 | 262 | 1 | 108 | Ozone |
| 2017 | 44 | 282 | — | 84 | Ozone |
| 2016 | 41 | 316 | — | 67 | Ozone |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2018 Air Quality Summary
Primary Pollutant Days (2018)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Dinosaur Air Quality
What is the air quality in Dinosaur today?
The current AQI in Dinosaur is 5, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Dinosaur getting better or worse?
Air quality in Dinosaur has been stable. The median AQI has risen 1 points (from 41 in 2016 to 42 in 2018).
What is the most common air pollutant in Dinosaur?
Ozone is the primary air pollutant in Dinosaur, responsible for 331 days (100% of monitored days) in 2018. Ground-level ozone forms when sunlight reacts with emissions from vehicles and industry, typically peaking on hot summer afternoons.
How many unhealthy air days does Dinosaur have per year?
In 2018, Dinosaur recorded 79% good air quality days (262 days) out of 331 monitored days. There were 1 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 108.
What air quality grade does Dinosaur receive?
Dinosaur receives an air quality grade of A-, placing it better than 49% of US cities. This is based on a median AQI of 42 in 2018, with 262 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 49% of US cities
Nearby Cities
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National Rankings
See how Dinosaur compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Dinosaur
Ozone is Dinosaur's primary pollutant. Standard HEPA filters don't capture ozone molecules — you need activated carbon or PECO technology to chemically break them down. We highlight those units here.
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