EnviroNearby

Jackson County, Illinois air quality history

Daily Air Quality Index summaries from EPA monitors in Jackson, Illinois, 1989–2010.

100%
Good days in 2010
20
Median daily AQI, 2010
0
Days above 100 in 2010
44
Days with an AQI in 2010 (of 365)

In 2010, EPA reported a daily Air Quality Index (AQI) for Jackson, Illinois on 44 days. 44 of those days (100%) were in the Good range, and the median daily AQI was 20. That median is lower than the typical monitored county in Illinois (median 40 across 24 counties), and lower than the typical monitored U.S. county (44). The main pollutant was coarse particles (PM10) on 44 days.

EPA did not report an AQI for every day of 2010 here (44 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 2010; EPA's files for 2011–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (2005, 2006, 2007, 2008, 2009, 2010…) 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 34 of 37 days1989: Moderate 3 of 37 days19891990: Good 53 of 57 days1990: Moderate 4 of 57 days1991: Good 49 of 50 days1991: Moderate 1 of 50 days19911992: Good 51 of 55 days1992: Moderate 4 of 55 days1993: Good 51 of 51 days19931994: Good 54 of 55 days1994: Moderate 1 of 55 days1995: Good 58 of 59 days1995: Moderate 1 of 59 days19951996: Good 61 of 61 days1997: Good 59 of 59 days19971998: Good 58 of 58 days1999: Good 54 of 54 days19992000: Good 58 of 60 days2000: Moderate 2 of 60 days2001: Good 60 of 60 days20012002: Good 58 of 59 days2002: Moderate 1 of 59 days2003: Good 60 of 60 days20032004: Good 61 of 61 days2005: Good 56 of 57 days2005: Moderate 1 of 57 days20052006: Good 59 of 60 days2006: Moderate 1 of 60 days2007: Good 57 of 58 days2007: Moderate 1 of 58 days20072008: Good 56 of 56 days2009: Good 61 of 61 days20092010: Good 44 of 44 days2010
  • 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 381990: 90th percentile AQI 441991: 90th percentile AQI 401992: 90th percentile AQI 431993: 90th percentile AQI 351994: 90th percentile AQI 291995: 90th percentile AQI 381996: 90th percentile AQI 291997: 90th percentile AQI 331998: 90th percentile AQI 381999: 90th percentile AQI 332000: 90th percentile AQI 392001: 90th percentile AQI 302002: 90th percentile AQI 312003: 90th percentile AQI 332004: 90th percentile AQI 302005: 90th percentile AQI 332006: 90th percentile AQI 292007: 90th percentile AQI 332008: 90th percentile AQI 282009: 90th percentile AQI 252010: 90th percentile AQI 301989: Median AQI 241990: Median AQI 221991: Median AQI 231992: Median AQI 241993: Median AQI 171994: Median AQI 191995: Median AQI 181996: Median AQI 171997: Median AQI 191998: Median AQI 201999: Median AQI 202000: Median AQI 192001: Median AQI 172002: Median AQI 162003: Median AQI 172004: Median AQI 182005: Median AQI 222006: Median AQI 192007: Median AQI 202008: Median AQI 162009: Median AQI 142010: Median AQI 20198919911993199519971999200120032005200720092010
  • 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
Coarse particles (PM10)44100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2010444400000203046PM10
2009616100000142536PM10
2008565600000162835PM10
2007585710000203356PM10
2006605910000192953PM10
2005575610000223351PM10
2004616100000183041PM10
2003606000000173344PM10
2002595810000163152PM10
2001606000000173044PM10
2000605820000193951PM10
1999545400000203350PM10
1998585800000203844PM10
1997595900000193345PM10
1996616100000172945PM10
1995595810000183853PM10
1994555410000192961PM10
1993515100000173549PM10
1992555140000244381PM10
1991504910000234053PM10
1990575340000224459PM10
1989373430000243870PM10

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 Illinois with a similar median AQI in 2010

All monitored counties in Illinois

Source: U.S. EPA AirData, “Annual AQI by County” files for 1989–2010 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem