Johnson, Texas Air Quality
Johnson County, Texas (TX)
→ Stableover 10 years
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days).
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 | 38 | 74 | 126 | 283 | 71 | 8 | Ozone |
| 2022 | 41 | 74 | 156 | 281 | 67 | 14 | Ozone |
| 2021 | 37 | 61 | 136 | 311 | 46 | 6 | Ozone |
| 2020 | 34 | 50 | 105 | 320 | 27 | 2 | Ozone |
| 2019 | 38 | 61 | 143 | 298 | 47 | 7 | Ozone |
| 2018 | 35 | 61 | 156 | 302 | 44 | 8 | Ozone |
| 2017 | 41 | 71 | 147 | 293 | 61 | 8 | Ozone |
| 2016 | 40 | 64 | 150 | 300 | 53 | 4 | Ozone |
| 2015 | 35 | 64 | 156 | 300 | 55 | 6 | Ozone |
| 2014 | 36 | 61 | 129 | 307 | 50 | 4 | Ozone |
What This Means for Johnson County Residents
Johnson, Texas has received an Air Quality Grade of C (62/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 38 falls in the "Good" range.
The primary pollutant affecting this area is Ground-Level Ozone. Over the past 5 years, this area has averaged 7 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.
Related Cities in Texas
Frequently Asked Questions
Johnson, Texas has a current median AQI of 38, which falls in the "Good" range. The area has received an Air Quality Grade of C (62/100) based on 10 years of EPA monitoring data.
Air quality in Johnson, Texas is stable over the past decade. The median AQI has changed by +2 points from 2014 to 2023.
Johnson, Texas averages 7 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 Johnson, Texas is Ground-Level Ozone. This is the dominant contributor to elevated AQI readings in the Johnson County area.
Johnson, Texas averages 7 unhealthy air days per year. Asthma patients should monitor daily AQI readings and limit outdoor activity when AQI exceeds 100. The primary pollutant is Ground-Level Ozone, which is a known asthma trigger.
With a median AQI of 38 (Good), outdoor exercise in Johnson, Texas is generally safe year-round. Johnson, Texas averages 7 days per year when athletes should move workouts indoors.