Ellis, Texas Air Quality
Ellis County, Texas (TX)
↓ Improvingover 10 years
How Ellis, Texas Air Quality Compares
Ellis, Texas's median AQI of 36is 12% better than the national average of 41. Air quality has improved by 12 AQI points over the past decade. The area averages 1 unhealthy air days per year. The primary pollutant of concern is Fine Particulate Matter (PM2.5).
Ellis, Texas Air Quality: The Full Picture
Ellis, Texas (Ellis County) holds an AirHistory Air Quality Grade of B (good, scoring 73 out of 100), built from 10 years of EPA Air Quality System monitoring. Its median AQI fell 12 points between 2014 (48) and 2023 (36), and the five-year median now sits at 41 — inside the "Good" band on the EPA scale.
The pollutant driving most of the area's AQI readings is Fine Particulate Matter (PM2.5). In 2023, the single worst reading hit an AQI of 112 (Unhealthy for Sensitive Groups), while the 90th-percentile day — the level the dirtiest 10% of days reach — came in at 61.
In 2023, Ellis County recorded 286 "Good" air days (82% of the 348 days with valid AQI data), 60 "Moderate" days, and 2 days at "Unhealthy for Sensitive Groups" or above. Over the most recent five years on record, monitors logged 4 days that crossed into "Unhealthy for Sensitive Groups" or worse — about 1 per year.
The decade-long trend is improving: median AQI has been dropping by roughly 1.18 points per year. The cleanest year in the record was 2023 (median AQI 36), and the most polluted was 2017 (median AQI 50). Because the data come straight from federally certified EPA monitors, these figures track the Texas county the monitors physically sit in rather than a city boundary.
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10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). This area has seen measurable air quality improvement over the decade.
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 36 | 61 | 112 | 286 | 60 | 2 | Ozone |
| 2022 | 38 | 54 | 97 | 311 | 53 | 0 | Ozone |
| 2021 | 43 | 60 | 105 | 262 | 100 | 1 | Ozone |
| 2020 | 45 | 61 | 125 | 239 | 126 | 1 | PM2.5 |
| 2019 | 44 | 58 | 97 | 250 | 115 | 0 | Ozone |
| 2018 | 45 | 67 | 120 | 229 | 128 | 8 | PM2.5 |
| 2017 | 50 | 63 | 122 | 183 | 179 | 3 | PM2.5 |
| 2016 | 46 | 59 | 100 | 234 | 132 | 0 | PM2.5 |
| 2015 | 46 | 66 | 136 | 224 | 138 | 3 | PM2.5 |
| 2014 | 48 | 64 | 97 | 193 | 172 | 0 | PM2.5 |
What This Means for Ellis County Residents
Ellis, Texas has received an Air Quality Grade of B (73/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 36 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 12 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 1 unhealthy air quality days per year, days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity. The American Lung Association's State of the Air report provides additional context on long-term health risks from air pollution exposure.
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Frequently Asked Questions
Ellis, Texas has a current median AQI of 36, which falls in the "Good" range. The area has received an Air Quality Grade of B (73/100) based on 10 years of EPA monitoring data.
Air quality in Ellis, Texas is improving over the past decade. The median AQI has changed by -12 points from 2014 to 2023.
Ellis, Texas averages 1 unhealthy air quality days per year over the past 5 years. On these days, sensitive groups including children, the elderly, and those with respiratory conditions should limit outdoor activity.
The primary pollutant affecting Ellis, Texas is Fine Particulate Matter (PM2.5). This is the dominant contributor to elevated AQI readings in the Ellis County area.
Ellis, Texas averages 1 unhealthy air days per year. This is relatively low, making it a reasonable choice for asthma sufferers. The primary pollutant is Fine Particulate Matter (PM2.5), which is a known asthma trigger.
With a median AQI of 36 (Good), outdoor exercise in Ellis, Texas is generally safe year-round. Ellis, Texas averages 1 days per year when athletes should move workouts indoors.