EnviroNearby

Hinds County, Mississippi air quality history

Daily Air Quality Index summaries from EPA monitors in Hinds, Mississippi, 1980–2025.

46%
Good days in 2025
52
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 Hinds, Mississippi on 365 days. 167 of those days (46%) were in the Good range, and the median daily AQI was 52. That median is higher than 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 291 days. Across the years with fuller monitoring, the share of Good days fell: an average of 75% in 1980–1982 versus 46% 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%1980: Good 250 of 366 days1980: Moderate 78 of 366 days1980: Unhealthy for Sensitive Groups 33 of 366 days1980: Unhealthy 4 of 366 days1980: Very Unhealthy 1 of 366 days19801981: Good 260 of 360 days1981: Moderate 78 of 360 days1981: Unhealthy for Sensitive Groups 16 of 360 days1981: Unhealthy 6 of 360 days1982: Good 310 of 364 days1982: Moderate 49 of 364 days1982: Unhealthy for Sensitive Groups 3 of 364 days1982: Unhealthy 1 of 364 days1982: Very Unhealthy 1 of 364 days1983: Good 286 of 364 days1983: Moderate 65 of 364 days1983: Unhealthy for Sensitive Groups 11 of 364 days1983: Unhealthy 2 of 364 days1984: Good 297 of 366 days1984: Moderate 57 of 366 days1984: Unhealthy for Sensitive Groups 11 of 366 days1984: Unhealthy 1 of 366 days1985: Good 318 of 362 days1985: Moderate 38 of 362 days1985: Unhealthy for Sensitive Groups 6 of 362 days19851986: Good 296 of 365 days1986: Moderate 61 of 365 days1986: Unhealthy for Sensitive Groups 8 of 365 days1987: Good 285 of 365 days1987: Moderate 64 of 365 days1987: Unhealthy for Sensitive Groups 15 of 365 days1987: Unhealthy 1 of 365 days1988: Good 288 of 366 days1988: Moderate 63 of 366 days1988: Unhealthy for Sensitive Groups 13 of 366 days1988: Unhealthy 2 of 366 days1989: Good 318 of 363 days1989: Moderate 44 of 363 days1989: Unhealthy for Sensitive Groups 1 of 363 days1990: Good 287 of 365 days1990: Moderate 56 of 365 days1990: Unhealthy for Sensitive Groups 21 of 365 days1990: Unhealthy 1 of 365 days19901991: Good 326 of 364 days1991: Moderate 35 of 364 days1991: Unhealthy for Sensitive Groups 3 of 364 days1992: Good 310 of 341 days1992: Moderate 29 of 341 days1992: Unhealthy for Sensitive Groups 2 of 341 days1993: Good 322 of 365 days1993: Moderate 40 of 365 days1993: Unhealthy for Sensitive Groups 3 of 365 days1994: Good 323 of 365 days1994: Moderate 41 of 365 days1994: Unhealthy for Sensitive Groups 1 of 365 days1995: Good 293 of 365 days1995: Moderate 66 of 365 days1995: Unhealthy for Sensitive Groups 6 of 365 days19951996: Good 301 of 366 days1996: Moderate 55 of 366 days1996: Unhealthy for Sensitive Groups 10 of 366 days1997: Good 275 of 365 days1997: Moderate 77 of 365 days1997: Unhealthy for Sensitive Groups 13 of 365 days1998: Good 277 of 365 days1998: Moderate 62 of 365 days1998: Unhealthy for Sensitive Groups 25 of 365 days1998: Unhealthy 1 of 365 days1999: Good 209 of 365 days1999: Moderate 133 of 365 days1999: Unhealthy for Sensitive Groups 22 of 365 days1999: Unhealthy 1 of 365 days2000: Good 201 of 366 days2000: Moderate 142 of 366 days2000: Unhealthy for Sensitive Groups 22 of 366 days2000: Unhealthy 1 of 366 days20002001: Good 223 of 365 days2001: Moderate 132 of 365 days2001: Unhealthy for Sensitive Groups 10 of 365 days2002: Good 112 of 365 days2002: Moderate 246 of 365 days2002: Unhealthy for Sensitive Groups 5 of 365 days2002: Unhealthy 2 of 365 days2003: Good 70 of 365 days2003: Moderate 292 of 365 days2003: Unhealthy for Sensitive Groups 3 of 365 days2004: Good 94 of 366 days2004: Moderate 271 of 366 days2004: Unhealthy for Sensitive Groups 1 of 366 days2005: Good 84 of 365 days2005: Moderate 270 of 365 days2005: Unhealthy for Sensitive Groups 10 of 365 days2005: Unhealthy 1 of 365 days20052006: Good 117 of 365 days2006: Moderate 236 of 365 days2006: Unhealthy for Sensitive Groups 12 of 365 days2007: Good 94 of 365 days2007: Moderate 266 of 365 days2007: Unhealthy for Sensitive Groups 5 of 365 days2008: Good 112 of 358 days2008: Moderate 244 of 358 days2008: Unhealthy for Sensitive Groups 2 of 358 days2009: Good 130 of 345 days2009: Moderate 214 of 345 days2009: Unhealthy for Sensitive Groups 1 of 345 days2010: Good 129 of 362 days2010: Moderate 232 of 362 days2010: Unhealthy for Sensitive Groups 1 of 362 days20102011: Good 70 of 365 days2011: Moderate 288 of 365 days2011: Unhealthy for Sensitive Groups 7 of 365 days2012: Good 146 of 366 days2012: Moderate 217 of 366 days2012: Unhealthy for Sensitive Groups 2 of 366 days2012: Unhealthy 1 of 366 days2013: Good 157 of 365 days2013: Moderate 208 of 365 days2014: Good 106 of 365 days2014: Moderate 258 of 365 days2014: Unhealthy 1 of 365 days2015: Good 131 of 365 days2015: Moderate 234 of 365 days20152016: Good 153 of 366 days2016: Moderate 213 of 366 days2017: Good 162 of 365 days2017: Moderate 203 of 365 days2018: Good 165 of 365 days2018: Moderate 199 of 365 days2018: Unhealthy for Sensitive Groups 1 of 365 days2019: Good 161 of 365 days2019: Moderate 204 of 365 days2020: Good 152 of 366 days2020: Moderate 213 of 366 days2020: Unhealthy for Sensitive Groups 1 of 366 days20202021: Good 144 of 365 days2021: Moderate 221 of 365 days2022: Good 168 of 365 days2022: Moderate 195 of 365 days2022: Unhealthy for Sensitive Groups 2 of 365 days2023: Good 131 of 365 days2023: Moderate 231 of 365 days2023: Unhealthy for Sensitive Groups 3 of 365 days2024: Good 203 of 366 days2024: Moderate 163 of 366 days2025: Good 167 of 365 days2025: Moderate 198 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 year0501001501980: 90th percentile AQI 1051981: 90th percentile AQI 801982: 90th percentile AQI 611983: 90th percentile AQI 671984: 90th percentile AQI 671985: 90th percentile AQI 521986: 90th percentile AQI 671987: 90th percentile AQI 771988: 90th percentile AQI 741989: 90th percentile AQI 541990: 90th percentile AQI 841991: 90th percentile AQI 511992: 90th percentile AQI 491993: 90th percentile AQI 541994: 90th percentile AQI 541995: 90th percentile AQI 771996: 90th percentile AQI 671997: 90th percentile AQI 771998: 90th percentile AQI 871999: 90th percentile AQI 922000: 90th percentile AQI 932001: 90th percentile AQI 792002: 90th percentile AQI 722003: 90th percentile AQI 772004: 90th percentile AQI 742005: 90th percentile AQI 802006: 90th percentile AQI 772007: 90th percentile AQI 772008: 90th percentile AQI 712009: 90th percentile AQI 652010: 90th percentile AQI 682011: 90th percentile AQI 742012: 90th percentile AQI 662013: 90th percentile AQI 662014: 90th percentile AQI 712015: 90th percentile AQI 702016: 90th percentile AQI 642017: 90th percentile AQI 642018: 90th percentile AQI 712019: 90th percentile AQI 662020: 90th percentile AQI 662021: 90th percentile AQI 642022: 90th percentile AQI 652023: 90th percentile AQI 742024: 90th percentile AQI 642025: 90th percentile AQI 631980: Median AQI 431981: Median AQI 421982: Median AQI 341983: Median AQI 381984: Median AQI 351985: Median AQI 341986: Median AQI 351987: Median AQI 381988: Median AQI 361989: Median AQI 301990: Median AQI 371991: Median AQI 311992: Median AQI 321993: Median AQI 321994: Median AQI 311995: Median AQI 351996: Median AQI 331997: Median AQI 341998: Median AQI 341999: Median AQI 452000: Median AQI 472001: Median AQI 432002: Median AQI 552003: Median AQI 582004: Median AQI 572005: Median AQI 592006: Median AQI 562007: Median AQI 562008: Median AQI 542009: Median AQI 532010: Median AQI 542011: Median AQI 582012: Median AQI 532013: Median AQI 522014: Median AQI 562015: Median AQI 542016: Median AQI 522017: Median AQI 522018: Median AQI 522019: Median AQI 522020: Median AQI 532021: Median AQI 522022: Median AQI 522023: Median AQI 542024: Median AQI 482025: Median AQI 521980198519901995200020052010201520202025
  • 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)29180%
Ozone7420%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253651671980000526384PM2.5
20243662031630000486496PM2.5
202336513123130005474115PM2.5
202236516819520005265105PM2.5
20213651442210000526488PM2.5
202036615221310005366114PM2.5
201936516120400005266100PM2.5
201836516519910005271112PM2.5
20173651622030000526490PM2.5
201636615321300005264100PM2.5
201536513123400005470100PM2.5
201436510625801005671154PM2.5
20133651572080000526693PM2.5
201236614621721005366156PM2.5
20113657028870005874150PM2.5
201036212923210005468108PM2.5
200934513021410005365119PM2.5
200835811224420005471105PM2.5
20073659426650005677115PM2.5
2006365117236120005677150PM2.5
200536584270101005980174PM2.5
20043669427110005774105PM2.5
20033657029230005877112PM2.5
200236511224652005572161PM2.5
2001365223132100004379136Ozone
2000366201142221004793174Ozone
1999365209133221004592169Ozone
199836527762251003487151Ozone
199736527577130003477147Ozone
199636630155100003367147Ozone
19953652936660003577129Ozone
19943653234110003154108Ozone
19933653224030003254105Ozone
19923413102920003249101Ozone
19913643263530003151140Ozone
199036528756211003784151Ozone
19893633184410003054101Ozone
198836628863132003674161Ozone
198736528564151003877154Ozone
19863652966180003567140Ozone
19853623183860003452150Ozone
198436629757111003567164Ozone
198336428665112003867164Ozone
19823643104931103461216Ozone
198136026078166004280159Ozone
1980366250783341043105208Ozone

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 1980–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem