EnviroNearby

Jackson County, Mississippi air quality history

Daily Air Quality Index summaries from EPA monitors in Jackson, Mississippi, 1984–2025.

70%
Good days in 2025
44
Median daily AQI, 2025
0
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Jackson, Mississippi on 365 days. 255 of those days (70%) were in the Good range, and the median daily AQI was 44. That median is about the same as the typical monitored county in Mississippi (median 43 across 10 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 231 days. Across the years with fuller monitoring, the share of Good days fell: an average of 67% in 1984–1986 versus 61% 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%1984: Good 160 of 239 days1984: Moderate 50 of 239 days1984: Unhealthy for Sensitive Groups 25 of 239 days1984: Unhealthy 4 of 239 days19841985: Good 155 of 217 days1985: Moderate 47 of 217 days1985: Unhealthy for Sensitive Groups 13 of 217 days1985: Unhealthy 2 of 217 days1986: Good 159 of 258 days1986: Moderate 66 of 258 days1986: Unhealthy for Sensitive Groups 29 of 258 days1986: Unhealthy 3 of 258 days1986: Very Unhealthy 1 of 258 days1987: Good 145 of 269 days1987: Moderate 81 of 269 days1987: Unhealthy for Sensitive Groups 32 of 269 days1987: Unhealthy 11 of 269 days1988: Good 166 of 270 days1988: Moderate 68 of 270 days1988: Unhealthy for Sensitive Groups 25 of 270 days1988: Unhealthy 11 of 270 days1989: Good 193 of 265 days1989: Moderate 60 of 265 days1989: Unhealthy for Sensitive Groups 11 of 265 days1989: Unhealthy 1 of 265 days19891990: Good 154 of 272 days1990: Moderate 77 of 272 days1990: Unhealthy for Sensitive Groups 34 of 272 days1990: Unhealthy 7 of 272 days1991: Good 196 of 258 days1991: Moderate 51 of 258 days1991: Unhealthy for Sensitive Groups 10 of 258 days1991: Unhealthy 1 of 258 days1992: Good 133 of 204 days1992: Moderate 56 of 204 days1992: Unhealthy for Sensitive Groups 14 of 204 days1992: Unhealthy 1 of 204 days1993: Good 228 of 290 days1993: Moderate 53 of 290 days1993: Unhealthy for Sensitive Groups 9 of 290 days1994: Good 236 of 288 days1994: Moderate 34 of 288 days1994: Unhealthy for Sensitive Groups 17 of 288 days1994: Unhealthy 1 of 288 days19941995: Good 207 of 286 days1995: Moderate 54 of 286 days1995: Unhealthy for Sensitive Groups 25 of 286 days1996: Good 205 of 290 days1996: Moderate 65 of 290 days1996: Unhealthy for Sensitive Groups 18 of 290 days1996: Unhealthy 2 of 290 days1997: Good 134 of 234 days1997: Moderate 50 of 234 days1997: Unhealthy for Sensitive Groups 39 of 234 days1997: Unhealthy 11 of 234 days1998: Good 131 of 221 days1998: Moderate 58 of 221 days1998: Unhealthy for Sensitive Groups 20 of 221 days1998: Unhealthy 11 of 221 days1998: Very Unhealthy 1 of 221 days1999: Good 105 of 252 days1999: Moderate 117 of 252 days1999: Unhealthy for Sensitive Groups 26 of 252 days1999: Unhealthy 4 of 252 days19992000: Good 121 of 283 days2000: Moderate 122 of 283 days2000: Unhealthy for Sensitive Groups 34 of 283 days2000: Unhealthy 5 of 283 days2000: Very Unhealthy 1 of 283 days2001: Good 160 of 279 days2001: Moderate 103 of 279 days2001: Unhealthy for Sensitive Groups 15 of 279 days2001: Unhealthy 1 of 279 days2002: Good 173 of 280 days2002: Moderate 98 of 280 days2002: Unhealthy for Sensitive Groups 8 of 280 days2002: Unhealthy 1 of 280 days2003: Good 155 of 277 days2003: Moderate 104 of 277 days2003: Unhealthy for Sensitive Groups 15 of 277 days2003: Unhealthy 3 of 277 days2004: Good 200 of 317 days2004: Moderate 97 of 317 days2004: Unhealthy for Sensitive Groups 19 of 317 days2004: Unhealthy 1 of 317 days20042005: Good 166 of 358 days2005: Moderate 173 of 358 days2005: Unhealthy for Sensitive Groups 19 of 358 days2006: Good 99 of 359 days2006: Moderate 238 of 359 days2006: Unhealthy for Sensitive Groups 19 of 359 days2006: Unhealthy 3 of 359 days2007: Good 106 of 365 days2007: Moderate 246 of 365 days2007: Unhealthy for Sensitive Groups 12 of 365 days2007: Unhealthy 1 of 365 days2008: Good 98 of 326 days2008: Moderate 217 of 326 days2008: Unhealthy for Sensitive Groups 9 of 326 days2008: Unhealthy 2 of 326 days2009: Good 260 of 328 days2009: Moderate 64 of 328 days2009: Unhealthy for Sensitive Groups 4 of 328 days20092010: Good 264 of 364 days2010: Moderate 92 of 364 days2010: Unhealthy for Sensitive Groups 8 of 364 days2011: Good 259 of 364 days2011: Moderate 99 of 364 days2011: Unhealthy for Sensitive Groups 6 of 364 days2012: Good 305 of 361 days2012: Moderate 48 of 361 days2012: Unhealthy for Sensitive Groups 8 of 361 days2013: Good 328 of 356 days2013: Moderate 27 of 356 days2013: Unhealthy for Sensitive Groups 1 of 356 days2014: Good 322 of 361 days2014: Moderate 31 of 361 days2014: Unhealthy for Sensitive Groups 8 of 361 days20142015: Good 291 of 363 days2015: Moderate 72 of 363 days2016: Good 288 of 340 days2016: Moderate 52 of 340 days2017: Good 294 of 355 days2017: Moderate 60 of 355 days2017: Unhealthy for Sensitive Groups 1 of 355 days2018: Good 219 of 362 days2018: Moderate 141 of 362 days2018: Unhealthy for Sensitive Groups 2 of 362 days2019: Good 232 of 365 days2019: Moderate 132 of 365 days2019: Unhealthy for Sensitive Groups 1 of 365 days20192020: Good 204 of 356 days2020: Moderate 152 of 356 days2021: Good 242 of 359 days2021: Moderate 117 of 359 days2022: Good 243 of 365 days2022: Moderate 121 of 365 days2022: Unhealthy for Sensitive Groups 1 of 365 days2023: Good 176 of 364 days2023: Moderate 186 of 364 days2023: Unhealthy for Sensitive Groups 2 of 364 days2024: Good 236 of 363 days2024: Moderate 127 of 363 days20242025: Good 255 of 365 days2025: Moderate 110 of 365 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 year0501001501984: 90th percentile AQI 1051985: 90th percentile AQI 901986: 90th percentile AQI 1051987: 90th percentile AQI 1291988: 90th percentile AQI 1191989: 90th percentile AQI 841990: 90th percentile AQI 1191991: 90th percentile AQI 801992: 90th percentile AQI 901993: 90th percentile AQI 841994: 90th percentile AQI 771995: 90th percentile AQI 971996: 90th percentile AQI 871997: 90th percentile AQI 1261998: 90th percentile AQI 1151999: 90th percentile AQI 1052000: 90th percentile AQI 1082001: 90th percentile AQI 842002: 90th percentile AQI 772003: 90th percentile AQI 872004: 90th percentile AQI 872005: 90th percentile AQI 872006: 90th percentile AQI 902007: 90th percentile AQI 772008: 90th percentile AQI 712009: 90th percentile AQI 572010: 90th percentile AQI 642011: 90th percentile AQI 712012: 90th percentile AQI 642013: 90th percentile AQI 502014: 90th percentile AQI 512015: 90th percentile AQI 582016: 90th percentile AQI 542017: 90th percentile AQI 572018: 90th percentile AQI 622019: 90th percentile AQI 612020: 90th percentile AQI 592021: 90th percentile AQI 572022: 90th percentile AQI 602023: 90th percentile AQI 672024: 90th percentile AQI 612025: 90th percentile AQI 591984: Median AQI 441985: Median AQI 421986: Median AQI 441987: Median AQI 491988: Median AQI 441989: Median AQI 421990: Median AQI 491991: Median AQI 401992: Median AQI 431993: Median AQI 401994: Median AQI 341995: Median AQI 401996: Median AQI 411997: Median AQI 471998: Median AQI 441999: Median AQI 582000: Median AQI 562001: Median AQI 472002: Median AQI 442003: Median AQI 472004: Median AQI 432005: Median AQI 522006: Median AQI 572007: Median AQI 552008: Median AQI 552009: Median AQI 392010: Median AQI 412011: Median AQI 392012: Median AQI 332013: Median AQI 312014: Median AQI 322015: Median AQI 362016: Median AQI 392017: Median AQI 342018: Median AQI 472019: Median AQI 462020: Median AQI 472021: Median AQI 442022: Median AQI 442023: Median AQI 512024: Median AQI 442025: Median AQI 441984198919941999200420092014201920242025
  • 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)23163%
Ozone13336%
Nitrogen dioxide (NO₂)1<1%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652551100000445993PM2.5
20243632361270000446197PM2.5
202336417618620005167108PM2.5
202236524312110004460101PM2.5
20213592421170000445784PM2.5
20203562041520000475984PM2.5
201936523213210004661105PM2.5
201836221914120004762105PM2.5
20173552946010003457101Ozone
2016340288520000395493Ozone
2015363291720000365893Ozone
20143613223180003251122Ozone
20133563282710003150105Ozone
20123613054880003364119Ozone
20113642599960003971115Ozone
20103642649280004164140Ozone
20093282606440003957147Ozone
20083269821792005571164PM2.5
2007365106246121005577156PM2.5
200635999238193005790159PM2.5
2005358166173190005287147Ozone
200431720097191004387156Ozone
2003277155104153004787177Ozone
20022801739881004477154Ozone
2001279160103151004784164Ozone
20002831211223451056108208Ozone
19992521051172640058105179Ozone
19982211315820111044115218Ozone
19972341345039110047126192Ozone
199629020565182004187166Ozone
199528620754250004097150Ozone
199428823634171003477172Ozone
19932902285390004084133Ozone
199220413356141004390166Ozone
199125819651101004080190Ozone
1990272154773470049119179Ozone
198926519360111004284154Ozone
19882701666825110044119197Ozone
19872691458132110049129192Ozone
1986258159662931044105201Ozone
198521715547132004290156Ozone
1984239160502540044105187Ozone

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 Mississippi with a similar median AQI in 2025

All monitored counties in Mississippi

Source: U.S. EPA AirData, “Annual AQI by County” files for 1984–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem