EnviroNearby

Ashley County, Arkansas air quality history

Daily Air Quality Index summaries from EPA monitors in Ashley, Arkansas, 1989–2025.

56%
Good days in 2025
48
Median daily AQI, 2025
0
Days above 100 in 2025
122
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Ashley, Arkansas on 122 days. 68 of those days (56%) were in the Good range, and the median daily AQI was 48. That median is about the same as the typical monitored county in Arkansas (median 46 across 11 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 122 days. Across the years with fuller monitoring, the share of Good days rose: an average of 54% in 2010–2018 versus 63% in 2021–2025.

EPA did not report an AQI for every day of 2025 here (122 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

Years with fewer than 120 monitored days (2013, 2014, 2015, 2016, 2022, 2023…) are shown in the table but left out of comparisons and trend statements.

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%1989: Good 29 of 32 days1989: Moderate 3 of 32 days19891990: Good 57 of 61 days1990: Moderate 4 of 61 days1991: Good 55 of 58 days1991: Moderate 3 of 58 days1992: Good 56 of 60 days1992: Moderate 4 of 60 days1993: Good 60 of 61 days1993: Moderate 1 of 61 days1994: Good 59 of 61 days1994: Moderate 2 of 61 days19941995: Good 58 of 61 days1995: Moderate 3 of 61 days1996: Good 59 of 61 days1996: Moderate 2 of 61 days1997: Good 58 of 60 days1997: Moderate 2 of 60 days1999: Good 1 of 28 days1999: Moderate 27 of 28 days2000: Good 8 of 90 days2000: Moderate 81 of 90 days2000: Unhealthy for Sensitive Groups 1 of 90 days20002001: Good 34 of 114 days2001: Moderate 80 of 114 days2002: Good 48 of 117 days2002: Moderate 68 of 117 days2002: Unhealthy for Sensitive Groups 1 of 117 days2003: Good 36 of 117 days2003: Moderate 81 of 117 days2004: Good 45 of 119 days2004: Moderate 74 of 119 days2005: Good 25 of 104 days2005: Moderate 75 of 104 days2005: Unhealthy for Sensitive Groups 4 of 104 days20052006: Good 36 of 118 days2006: Moderate 82 of 118 days2007: Good 35 of 115 days2007: Moderate 80 of 115 days2008: Good 49 of 119 days2008: Moderate 70 of 119 days2009: Good 57 of 116 days2009: Moderate 59 of 116 days2010: Good 44 of 120 days2010: Moderate 76 of 120 days20102011: Good 46 of 118 days2011: Moderate 72 of 118 days2012: Good 56 of 119 days2012: Moderate 63 of 119 days2013: Good 66 of 116 days2013: Moderate 50 of 116 days2014: Good 70 of 118 days2014: Moderate 48 of 118 days2015: Good 78 of 116 days2015: Moderate 38 of 116 days20152016: Good 72 of 118 days2016: Moderate 46 of 118 days2017: Good 71 of 121 days2017: Moderate 50 of 121 days2018: Good 82 of 121 days2018: Moderate 38 of 121 days2018: Unhealthy for Sensitive Groups 1 of 121 days2019: Good 72 of 120 days2019: Moderate 48 of 120 days2020: Good 91 of 122 days2020: Moderate 31 of 122 days20202021: Good 82 of 120 days2021: Moderate 38 of 120 days2022: Good 83 of 117 days2022: Moderate 34 of 117 days2023: Good 71 of 119 days2023: Moderate 47 of 119 days2023: Unhealthy for Sensitive Groups 1 of 119 days2024: Good 77 of 121 days2024: Moderate 44 of 121 days2025: Good 68 of 122 days2025: Moderate 54 of 122 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 year0501001989: 90th percentile AQI 451990: 90th percentile AQI 411991: 90th percentile AQI 381992: 90th percentile AQI 481993: 90th percentile AQI 391994: 90th percentile AQI 401995: 90th percentile AQI 431996: 90th percentile AQI 361997: 90th percentile AQI 371999: 90th percentile AQI 882000: 90th percentile AQI 842001: 90th percentile AQI 752002: 90th percentile AQI 712003: 90th percentile AQI 712004: 90th percentile AQI 732005: 90th percentile AQI 772006: 90th percentile AQI 782007: 90th percentile AQI 702008: 90th percentile AQI 662009: 90th percentile AQI 622010: 90th percentile AQI 662011: 90th percentile AQI 662012: 90th percentile AQI 632013: 90th percentile AQI 622014: 90th percentile AQI 632015: 90th percentile AQI 612016: 90th percentile AQI 582017: 90th percentile AQI 572018: 90th percentile AQI 582019: 90th percentile AQI 582020: 90th percentile AQI 562021: 90th percentile AQI 592022: 90th percentile AQI 562023: 90th percentile AQI 602024: 90th percentile AQI 602025: 90th percentile AQI 581989: Median AQI 311990: Median AQI 261991: Median AQI 231992: Median AQI 221993: Median AQI 241994: Median AQI 241995: Median AQI 251996: Median AQI 221997: Median AQI 231999: Median AQI 692000: Median AQI 612001: Median AQI 582002: Median AQI 532003: Median AQI 562004: Median AQI 532005: Median AQI 602006: Median AQI 582007: Median AQI 542008: Median AQI 522009: Median AQI 512010: Median AQI 542011: Median AQI 542012: Median AQI 512013: Median AQI 442014: Median AQI 432015: Median AQI 422016: Median AQI 452017: Median AQI 442018: Median AQI 392019: Median AQI 432020: Median AQI 372021: Median AQI 422022: Median AQI 392023: Median AQI 432024: Median AQI 412025: Median AQI 4819891994200020052010201520202025
  • 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
Fine particles (PM2.5)122100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202512268540000485879PM2.5
202412177440000416096PM2.5
2023119714710004360107PM2.5
202211783340000395699PM2.5
202112082380000425966PM2.5
202012291310000375691PM2.5
201912072480000435871PM2.5
2018121823810003958103PM2.5
201712171500000445769PM2.5
201611872460000455872PM2.5
201511678380000426176PM2.5
201411870480000436376PM2.5
201311666500000446289PM2.5
201211956630000516376PM2.5
201111846720000546695PM2.5
201012044760000546675PM2.5
200911657590000516277PM2.5
200811949700000526682PM2.5
200711535800000547090PM2.5
200611836820000587899PM2.5
2005104257540006077120PM2.5
200411945740000537385PM2.5
200311736810000567191PM2.5
2002117486810005371118PM2.5
200111434800000587598PM2.5
20009088110006184108PM2.5
1999281270000698893PM2.5
1997605820000233770PM10
1996615920000223659PM10
1995615830000254366PM10
1994615920000244054PM10
1993616010000243954PM10
1992605640000224860PM10
1991585530000233861PM10
1990615740000264161PM10
1989322930000314560PM10

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 Arkansas with a similar median AQI in 2025

All monitored counties in Arkansas

Source: U.S. EPA AirData, “Annual AQI by County” files for 1989–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem