EnviroNearby

Randall County, Texas air quality history

Daily Air Quality Index summaries from EPA monitors in Randall, Texas, 2007–2025.

83%
Good days in 2025
41
Median daily AQI, 2025
0
Days above 100 in 2025
360
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Randall, Texas on 360 days. 298 of those days (83%) were in the Good range, and the median daily AQI was 41. That median is lower than the typical monitored county in Texas (median 43.5 across 44 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 360 days. Across the years with fuller monitoring, the share of Good days fell: an average of 85% in 2007–2009 versus 79% in 2023–2025.

How the days broke down each year

Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.

Share of monitored days in each AQI category, by year0%25%50%75%100%2007: Good 213 of 248 days2007: Moderate 35 of 248 days20072008: Good 289 of 352 days2008: Moderate 63 of 352 days2009: Good 315 of 361 days2009: Moderate 46 of 361 days20092010: Good 321 of 350 days2010: Moderate 29 of 350 days2011: Good 212 of 323 days2011: Moderate 103 of 323 days2011: Unhealthy for Sensitive Groups 8 of 323 days20112012: Good 226 of 349 days2012: Moderate 110 of 349 days2012: Unhealthy for Sensitive Groups 13 of 349 days2013: Good 269 of 355 days2013: Moderate 84 of 355 days2013: Unhealthy for Sensitive Groups 2 of 355 days20132014: Good 291 of 354 days2014: Moderate 63 of 354 days2015: Good 300 of 356 days2015: Moderate 56 of 356 days20152016: Good 303 of 346 days2016: Moderate 42 of 346 days2016: Unhealthy for Sensitive Groups 1 of 346 days2017: Good 281 of 360 days2017: Moderate 78 of 360 days2017: Unhealthy for Sensitive Groups 1 of 360 days20172018: Good 266 of 362 days2018: Moderate 87 of 362 days2018: Unhealthy for Sensitive Groups 9 of 362 days2019: Good 280 of 354 days2019: Moderate 72 of 354 days2019: Unhealthy for Sensitive Groups 2 of 354 days20192020: Good 277 of 357 days2020: Moderate 80 of 357 days2021: Good 293 of 360 days2021: Moderate 64 of 360 days2021: Unhealthy for Sensitive Groups 3 of 360 days20212022: Good 251 of 338 days2022: Moderate 83 of 338 days2022: Unhealthy for Sensitive Groups 4 of 338 days2023: Good 270 of 363 days2023: Moderate 92 of 363 days2023: Unhealthy for Sensitive Groups 1 of 363 days20232024: Good 283 of 360 days2024: Moderate 75 of 360 days2024: Unhealthy for Sensitive Groups 2 of 360 days2025: Good 298 of 360 days2025: Moderate 62 of 360 days2025
  • Good
  • Moderate
  • Unhealthy for Sensitive Groups
  • Unhealthy
  • Very Unhealthy
  • Hazardous

Typical and high-end AQI over time

The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.

Median and 90th-percentile daily AQI, by year0501002007: 90th percentile AQI 542008: 90th percentile AQI 642009: 90th percentile AQI 542010: 90th percentile AQI 502011: 90th percentile AQI 802012: 90th percentile AQI 842013: 90th percentile AQI 742014: 90th percentile AQI 582015: 90th percentile AQI 582016: 90th percentile AQI 542017: 90th percentile AQI 612018: 90th percentile AQI 742019: 90th percentile AQI 612020: 90th percentile AQI 642021: 90th percentile AQI 642022: 90th percentile AQI 772023: 90th percentile AQI 712024: 90th percentile AQI 672025: 90th percentile AQI 612007: Median AQI 412008: Median AQI 412009: Median AQI 402010: Median AQI 402011: Median AQI 452012: Median AQI 452013: Median AQI 432014: Median AQI 412015: Median AQI 422016: Median AQI 412017: Median AQI 432018: Median AQI 432019: Median AQI 412020: Median AQI 422021: Median AQI 422022: Median AQI 442023: Median AQI 442024: Median AQI 432025: Median AQI 412007200920112013201520172019202120232025
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2025

On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.

PollutantDays as main pollutantShare of monitored days
Ozone360100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025360298620000416197Ozone
20243602837520004367108Ozone
20233632709210004471112Ozone
20223382518340004477122Ozone
20213602936430004264119Ozone
2020357277800000426490Ozone
20193542807220004161112Ozone
20183622668790004374112Ozone
20173602817810004361105Ozone
20163463034210004154112Ozone
2015356300560000425897Ozone
2014354291630000415893Ozone
20133552698420004374122Ozone
2012349226110130004584136Ozone
201132321210380004580140Ozone
2010350321290000405084Ozone
2009361315460000405487Ozone
20083522896300004164100Ozone
2007248213350000415487Ozone

What this data can and can’t tell you

It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.

It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.

Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.

Counties in Texas with a similar median AQI in 2025

All monitored counties in Texas

Source: U.S. EPA AirData, “Annual AQI by County” files for 2007–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem