EnviroNearby

Fayette County, Texas air quality history

Daily Air Quality Index summaries from EPA monitors in Fayette, Texas, 2005–2018.

79%
Good days in 2018
34
Median daily AQI, 2018
0
Days above 100 in 2018
330
Days with an AQI in 2018 (of 365)

In 2018, EPA reported a daily Air Quality Index (AQI) for Fayette, Texas on 330 days. 262 of those days (79%) were in the Good range, and the median daily AQI was 34. That median is lower than the typical monitored county in Texas (median 41 across 41 counties), and lower than the typical monitored U.S. county (41). The main pollutant was fine particles (PM2.5) on 330 days. Across the years with fuller monitoring, the share of Good days rose: an average of 57% in 2005–2007 versus 81% in 2016–2018.

The most recent year with data for this county is 2018; EPA's files for 2019–2025 contain no row for it, which usually means its monitors stopped reporting.

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%2005: Good 188 of 353 days2005: Moderate 165 of 353 days20052006: Good 215 of 356 days2006: Moderate 141 of 356 days20062007: Good 203 of 354 days2007: Moderate 151 of 354 days20072008: Good 197 of 354 days2008: Moderate 157 of 354 days20082009: Good 220 of 356 days2009: Moderate 136 of 356 days20092010: Good 251 of 361 days2010: Moderate 110 of 361 days20102011: Good 239 of 361 days2011: Moderate 122 of 361 days20112012: Good 260 of 365 days2012: Moderate 105 of 365 days20122013: Good 255 of 362 days2013: Moderate 107 of 362 days20132014: Good 239 of 352 days2014: Moderate 113 of 352 days20142015: Good 271 of 361 days2015: Moderate 90 of 361 days20152016: Good 283 of 361 days2016: Moderate 78 of 361 days20162017: Good 303 of 353 days2017: Moderate 50 of 353 days20172018: Good 262 of 330 days2018: Moderate 68 of 330 days2018
  • 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 year0501002005: 90th percentile AQI 642006: 90th percentile AQI 612007: 90th percentile AQI 642008: 90th percentile AQI 612009: 90th percentile AQI 612010: 90th percentile AQI 582011: 90th percentile AQI 612012: 90th percentile AQI 572013: 90th percentile AQI 592014: 90th percentile AQI 582015: 90th percentile AQI 572016: 90th percentile AQI 542017: 90th percentile AQI 532018: 90th percentile AQI 582005: Median AQI 472006: Median AQI 452007: Median AQI 462008: Median AQI 482009: Median AQI 442010: Median AQI 402011: Median AQI 392012: Median AQI 392013: Median AQI 382014: Median AQI 392015: Median AQI 332016: Median AQI 342017: Median AQI 332018: Median AQI 3420052006200720082009201020112012201320142015201620172018
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2018

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
Fine particles (PM2.5)330100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2018330262680000345896PM2.5
2017353303500000335384PM2.5
2016361283780000345486PM2.5
2015361271900000335780PM2.5
20143522391130000395890PM2.5
20133622551070000385988PM2.5
20123652601050000395777PM2.5
20113612391220000396193PM2.5
20103612511100000405878PM2.5
20093562201360000446186PM2.5
20083541971570000486188PM2.5
20073542031510000466477PM2.5
20063562151410000456185PM2.5
20053531881650000476499PM2.5

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.

All monitored counties in Texas

Source: U.S. EPA AirData, “Annual AQI by County” files for 2005–2018 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem