EnviroNearby

Lauderdale County, Mississippi air quality history

Daily Air Quality Index summaries from EPA monitors in Lauderdale, Mississippi, 1987–2025.

95%
Good days in 2025
35
Median daily AQI, 2025
0
Days above 100 in 2025
241
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Lauderdale, Mississippi on 241 days. 228 of those days (95%) were in the Good range, and the median daily AQI was 35. That median is lower than the typical monitored county in Mississippi (median 43 across 10 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 241 days. Across the years with fuller monitoring, the share of Good days rose: an average of 75% in 1987–1989 versus 96% in 2023–2025.

EPA did not report an AQI for every day of 2025 here (241 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.

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%1987: Good 198 of 272 days1987: Moderate 61 of 272 days1987: Unhealthy for Sensitive Groups 13 of 272 days19871988: Good 171 of 247 days1988: Moderate 57 of 247 days1988: Unhealthy for Sensitive Groups 17 of 247 days1988: Unhealthy 2 of 247 days1989: Good 189 of 224 days1989: Moderate 34 of 224 days1989: Unhealthy for Sensitive Groups 1 of 224 days1990: Good 205 of 273 days1990: Moderate 54 of 273 days1990: Unhealthy for Sensitive Groups 14 of 273 days1991: Good 247 of 274 days1991: Moderate 27 of 274 days1992: Good 250 of 273 days1992: Moderate 21 of 273 days1992: Unhealthy for Sensitive Groups 2 of 273 days19921993: Good 248 of 271 days1993: Moderate 22 of 271 days1993: Unhealthy for Sensitive Groups 1 of 271 days1994: Good 235 of 275 days1994: Moderate 37 of 275 days1994: Unhealthy for Sensitive Groups 3 of 275 days1995: Good 209 of 275 days1995: Moderate 58 of 275 days1995: Unhealthy for Sensitive Groups 7 of 275 days1995: Unhealthy 1 of 275 days1996: Good 203 of 244 days1996: Moderate 37 of 244 days1996: Unhealthy for Sensitive Groups 3 of 244 days1996: Unhealthy 1 of 244 days1997: Good 103 of 192 days1997: Moderate 79 of 192 days1997: Unhealthy for Sensitive Groups 10 of 192 days19971998: Good 133 of 206 days1998: Moderate 54 of 206 days1998: Unhealthy for Sensitive Groups 19 of 206 days1999: Good 84 of 226 days1999: Moderate 113 of 226 days1999: Unhealthy for Sensitive Groups 27 of 226 days1999: Unhealthy 2 of 226 days2000: Good 99 of 281 days2000: Moderate 152 of 281 days2000: Unhealthy for Sensitive Groups 29 of 281 days2000: Unhealthy 1 of 281 days2001: Good 150 of 275 days2001: Moderate 115 of 275 days2001: Unhealthy for Sensitive Groups 10 of 275 days2002: Good 163 of 271 days2002: Moderate 103 of 271 days2002: Unhealthy for Sensitive Groups 5 of 271 days20022003: Good 167 of 267 days2003: Moderate 96 of 267 days2003: Unhealthy for Sensitive Groups 4 of 267 days2004: Good 170 of 280 days2004: Moderate 108 of 280 days2004: Unhealthy for Sensitive Groups 2 of 280 days2005: Good 143 of 279 days2005: Moderate 121 of 279 days2005: Unhealthy for Sensitive Groups 14 of 279 days2005: Unhealthy 1 of 279 days2006: Good 140 of 324 days2006: Moderate 171 of 324 days2006: Unhealthy for Sensitive Groups 13 of 324 days2007: Good 106 of 365 days2007: Moderate 252 of 365 days2007: Unhealthy for Sensitive Groups 7 of 365 days20072008: Good 125 of 362 days2008: Moderate 237 of 362 days2009: Good 140 of 345 days2009: Moderate 205 of 345 days2010: Good 121 of 365 days2010: Moderate 242 of 365 days2010: Unhealthy for Sensitive Groups 2 of 365 days2011: Good 136 of 363 days2011: Moderate 227 of 363 days2012: Good 154 of 366 days2012: Moderate 212 of 366 days20122013: Good 232 of 242 days2013: Moderate 10 of 242 days2014: Good 228 of 242 days2014: Moderate 14 of 242 days2015: Good 236 of 241 days2015: Moderate 5 of 241 days2016: Good 203 of 212 days2016: Moderate 9 of 212 days2017: Good 240 of 245 days2017: Moderate 5 of 245 days20172018: Good 200 of 230 days2018: Moderate 30 of 230 days2019: Good 229 of 245 days2019: Moderate 16 of 245 days2020: Good 252 of 252 days2021: Good 244 of 245 days2021: Moderate 1 of 245 days2022: Good 230 of 240 days2022: Moderate 10 of 240 days20222023: Good 227 of 242 days2023: Moderate 15 of 242 days2024: Good 242 of 243 days2024: Moderate 1 of 243 days2025: Good 228 of 241 days2025: Moderate 13 of 241 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 year0501001501987: 90th percentile AQI 841988: 90th percentile AQI 931989: 90th percentile AQI 581990: 90th percentile AQI 871991: 90th percentile AQI 501992: 90th percentile AQI 501993: 90th percentile AQI 471994: 90th percentile AQI 611995: 90th percentile AQI 771996: 90th percentile AQI 671997: 90th percentile AQI 901998: 90th percentile AQI 1001999: 90th percentile AQI 1122000: 90th percentile AQI 1012001: 90th percentile AQI 842002: 90th percentile AQI 712003: 90th percentile AQI 742004: 90th percentile AQI 722005: 90th percentile AQI 872006: 90th percentile AQI 842007: 90th percentile AQI 782008: 90th percentile AQI 712009: 90th percentile AQI 642010: 90th percentile AQI 682011: 90th percentile AQI 682012: 90th percentile AQI 632013: 90th percentile AQI 462014: 90th percentile AQI 482015: 90th percentile AQI 442016: 90th percentile AQI 482017: 90th percentile AQI 452018: 90th percentile AQI 542019: 90th percentile AQI 492020: 90th percentile AQI 422021: 90th percentile AQI 422022: 90th percentile AQI 472023: 90th percentile AQI 482024: 90th percentile AQI 452025: 90th percentile AQI 481987: Median AQI 431988: Median AQI 421989: Median AQI 371990: Median AQI 391991: Median AQI 341992: Median AQI 351993: Median AQI 331994: Median AQI 351995: Median AQI 401996: Median AQI 391997: Median AQI 491998: Median AQI 451999: Median AQI 612000: Median AQI 582001: Median AQI 482002: Median AQI 452003: Median AQI 452004: Median AQI 462005: Median AQI 502006: Median AQI 542007: Median AQI 562008: Median AQI 542009: Median AQI 532010: Median AQI 542011: Median AQI 532012: Median AQI 522013: Median AQI 332014: Median AQI 362015: Median AQI 322016: Median AQI 372017: Median AQI 342018: Median AQI 372019: Median AQI 362020: Median AQI 312021: Median AQI 312022: Median AQI 362023: Median AQI 382024: Median AQI 362025: Median AQI 35198719921997200220072012201720222025
  • 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
Ozone241100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025241228130000354893Ozone
202424324210000364551Ozone
2023242227150000384887Ozone
2022240230100000364777Ozone
202124524410000314254Ozone
202025225200000314250Ozone
2019245229160000364977Ozone
2018230200300000375487Ozone
201724524050000344561Ozone
201621220390000374871Ozone
201524123650000324477Ozone
2014242228140000364871Ozone
2013242232100000334680Ozone
20123661542120000526390PM2.5
201136313622700005368100PM2.5
201036512124220005468108PM2.5
20093451402050000536480PM2.5
200836212523700005471100PM2.5
200736510625270005678116PM2.5
2006324140171130005484143Ozone
2005279143121141005087156Ozone
200428017010820004672108Ozone
20032671679640004574115Ozone
200227116310350004571150Ozone
2001275150115100004884143Ozone
2000281991522910058101156Ozone
1999226841132720061112174Ozone
1998206133541900045100150Ozone
199719210379100004990143Ozone
19962442033731003967151Ozone
19952752095871004077151Ozone
19942752353730003561133Ozone
19932712482210003347108Ozone
19922732502120003550112Ozone
19912742472700003450100Ozone
199027320554140003987140Ozone
19892241893410003758122Ozone
198824717157172004293169Ozone
198727219861130004384147Ozone

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 1987–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem