EnviroNearby

Phillips County, Arkansas air quality history

Daily Air Quality Index summaries from EPA monitors in Phillips, Arkansas, 1989–2012.

32%
Good days in 2010
55
Median daily AQI, 2010
0
Days above 100 in 2010
120
Days with an AQI in 2010 (of 365)

In 2010, EPA reported a daily Air Quality Index (AQI) for Phillips, Arkansas on 120 days. 39 of those days (32%) were in the Good range, and the median daily AQI was 55. That median is about the same as the typical monitored county in Arkansas (median 54 across 13 counties), and higher than the typical monitored U.S. county (44). The main pollutant was fine particles (PM2.5) on 120 days.

EPA did not report an AQI for every day of 2010 here (120 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.

The most recent year with data for this county is 2012; EPA's files for 2013–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (2006, 2007, 2008, 2009, 2011, 2012…) 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 31 of 33 days1989: Moderate 2 of 33 days19891990: Good 56 of 57 days1990: Moderate 1 of 57 days1991: Good 58 of 58 days19911992: Good 60 of 60 days1993: Good 53 of 58 days1993: Moderate 5 of 58 days19931994: Good 58 of 58 days1995: Good 53 of 54 days1995: Moderate 1 of 54 days19951996: Good 56 of 58 days1996: Moderate 2 of 58 days1997: Good 55 of 56 days1997: Moderate 1 of 56 days19971999: Good 6 of 22 days1999: Moderate 16 of 22 days2000: Good 26 of 112 days2000: Moderate 86 of 112 days20002001: Good 38 of 115 days2001: Moderate 76 of 115 days2001: Unhealthy for Sensitive Groups 1 of 115 days2002: Good 51 of 118 days2002: Moderate 67 of 118 days20022003: Good 40 of 116 days2003: Moderate 75 of 116 days2003: Unhealthy for Sensitive Groups 1 of 116 days2004: Good 47 of 114 days2004: Moderate 67 of 114 days20042005: Good 38 of 108 days2005: Moderate 68 of 108 days2005: Unhealthy for Sensitive Groups 2 of 108 days2006: Good 48 of 117 days2006: Moderate 69 of 117 days20062007: Good 41 of 113 days2007: Moderate 71 of 113 days2007: Unhealthy for Sensitive Groups 1 of 113 days2008: Good 47 of 117 days2008: Moderate 70 of 117 days20082009: Good 56 of 116 days2009: Moderate 60 of 116 days2010: Good 39 of 120 days2010: Moderate 81 of 120 days20102011: Good 47 of 119 days2011: Moderate 72 of 119 days2012: Good 32 of 59 days2012: Moderate 27 of 59 days2012
  • 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 361990: 90th percentile AQI 371991: 90th percentile AQI 361992: 90th percentile AQI 411993: 90th percentile AQI 441994: 90th percentile AQI 361995: 90th percentile AQI 401996: 90th percentile AQI 401997: 90th percentile AQI 341999: 90th percentile AQI 772000: 90th percentile AQI 782001: 90th percentile AQI 742002: 90th percentile AQI 732003: 90th percentile AQI 702004: 90th percentile AQI 652005: 90th percentile AQI 832006: 90th percentile AQI 692007: 90th percentile AQI 752008: 90th percentile AQI 692009: 90th percentile AQI 622010: 90th percentile AQI 662011: 90th percentile AQI 672012: 90th percentile AQI 611989: Median AQI 221990: Median AQI 211991: Median AQI 181992: Median AQI 241993: Median AQI 231994: Median AQI 211995: Median AQI 211996: Median AQI 211997: Median AQI 201999: Median AQI 602000: Median AQI 592001: Median AQI 562002: Median AQI 532003: Median AQI 562004: Median AQI 532005: Median AQI 572006: Median AQI 542007: Median AQI 552008: Median AQI 532009: Median AQI 512010: Median AQI 552011: Median AQI 532012: Median AQI 48198919911993199519972000200220042006200820102012
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2010

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)120100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20125932270000486168PM2.5
201111947720000536785PM2.5
201012039810000556678PM2.5
200911656600000516279PM2.5
200811747700000536991PM2.5
2007113417110005575103PM2.5
200611748690000546990PM2.5
2005108386820005783119PM2.5
200411447670000536589PM2.5
2003116407510005670107PM2.5
200211851670000537398PM2.5
2001115387610005674107PM2.5
200011226860000597899PM2.5
1999226160000607793PM2.5
1997565510000203453PM10
1996585620000214061PM10
1995545310000214052PM10
1994585800000213649PM10
1993585350000234455PM10
1992606000000244148PM10
1991585800000183648PM10
1990575610000213753PM10
1989333120000223654PM10

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 2010

All monitored counties in Arkansas

Source: U.S. EPA AirData, “Annual AQI by County” files for 1989–2012 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem