Texas · County air quality · 2025
Tarrant County, Texas
Median AQI 56 (Moderate). 31.8% of monitored days rated Good, direct from EPA Air Quality System stations.
- 56
- Median AQI
- 31.8%
- Good-air days
- 2
- Unhealthy days
- 2%
- Cleaner than US counties
Tarrant County's 2025 annual median AQI is 56 (Moderate), with 31.8% Good days
According to the U.S. EPA Air Quality System, Tarrant County, Texas posted a 2025 median AQI of 56 (Moderate) across 365 monitored days, with 31.8% rated Good and 2 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Tarrant County's 31.8% Good-day share places it cleaner than 2% of US counties in 2025.
- Closest median-AQI peer
- Butler County (33.1% Good, median AQI 55) is the closest nationwide median-AQI peer to Tarrant County.
- 2020–2025 trend
- Tarrant County's floor-qualifying Good-day share is worsening from 2020 to 2025 (44.5% → 31.8%).
- Median AQI
- Median AQI: 56
According to the 2025 EPA AQS county release on PlainAirData, Tarrant County, Texas ranks #933 of 951 by median AQI (56) and #934 by good-day share (31.8%). Ponce County, Puerto Rico is #1 of 951 by median AQI (3, 91.4% Good days) at good-day-share #159 ≠ largest of 7 at 100.0% Good days #1 by good-day share (100.0%, median AQI 9) at median-AQI #7.
Annual release change
What changed in the 2025 EPA annual release
- Tarrant County's peak single-day AQI fell from 203 to 162 between the 2024 and 2025 EPA annual releases, a change of -41 points.
- Tarrant County's Good-day share fell from 35.5% to 31.8% between the 2024 and 2025 EPA annual releases, a change of -3.7 percentage points.
- Tarrant County's Unhealthy-category days fell from 5 to 2 between the 2024 and 2025 EPA annual releases, a change of -3 days.
Data updated August 2026
- Good · 116 d · 31.8%
- Moderate · 219 d · 60.0%
- USG · 28 d · 7.7%
- Unhealthy · 2 d · 0.5%
How did Tarrant County's air break down in 2025?
Across 365 monitored days, 116 fell in the Good band (AQI 0–50) and 2 reached Unhealthy or worse. The worst single day peaked at AQI 162 (Unhealthy).
EPA AQS →Share of monitored days at AQI 0-50 (Good band).
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
Where Tarrant County sits nationally
COUNT-derived placement among 951 US counties with at least 100 monitored days in 2025. Tarrant County's Good-day share is 31.8% - cleaner than 2% of that comparison set.
Tarrant County Good-day share vs. every US county
Share of monitored days in the Good band (AQI 0–50) - EPA AQS annual release
31.8% 2nd percentile higher than 2% of 951 US counties
Each bar is a band; taller bars hold more US counties. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Environmental Protection Agency, Air Quality System (AQS) · 2025
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Tarrant County.
- PM2.5 · 218 days · 59.7%
- Ozone · 142 days · 38.9%
- NO₂ · 5 days · 1.4%
2024 daily-monitor rhythm in Tarrant County
Month-by-month median AQI from EPA day-level county monitors (366 reported days in 2024). Aug posted the highest typical readings (median AQI 74, peak 203); Feb was cleanest at median 44. Summer months (Jun–Aug) averaged median AQI 66 vs 48 in Dec–Feb. 6 days crossed Unhealthy (AQI >150) at least once that year.
Five-year seasonal record
EPA day-level county files · 2020–20241,827 daily readings show a recurring local pattern: Jun has the highest matched-month median AQI (66), while Feb is lowest (47). Each cell is that month’s median daily AQI, not a current-air forecast.
Lower AQI is better. The colors summarize EPA AQI bands; gaps mean the county had no day-level record for that month.
Health Impact Assessment
Tarrant County's air quality is rated Poor based on 31.8% good air days. There were 2 unhealthy days in 2025 when outdoor activity should be limited.
Air quality is acceptable most days, but 28 days reached "Unhealthy for Sensitive Groups" (AQI 101-150) and peak AQI reached 162. Sensitive groups should monitor real-time conditions at AirNow.gov.
The dominant pollutant is PM2.5, driving AQI on 218 of 365 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Tarrant County. Highest Good-day share: 2020 (44.5%, 163 of 366 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 163 | 187 | 13 | 3 | 52 | 159 |
| 2021 | 161 | 190 | 12 | 1 | 52 | 209 |
| 2022 | 132 | 211 | 20 | 2 | 54 | 172 |
| 2023 | 99 | 239 | 23 | 4 | 57 | 172 |
| 2024 | 130 | 205 | 25 | 5 | 54 | 203 |
| 2025 | 116 | 219 | 28 | 2 | 56 | 162 |
How does Tarrant County compare?
How Tarrant County compares
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Tarrant County, Texas · 2020–2025
Download this county's annual AQI row as CSV , with the same EPA fields and denominator shown on this page.
Every figure on PlainAirData is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.