EnviroNearby

Caddo Parish, Louisiana air quality history

Daily Air Quality Index summaries from EPA monitors in Caddo, Louisiana, 1981–2025.

80%
Good days in 2025
38
Median daily AQI, 2025
0
Days above 100 in 2025
360
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Caddo, Louisiana on 360 days. 288 of those days (80%) were in the Good range, and the median daily AQI was 38. That median is lower than the typical monitored county in Louisiana (median 42 across 21 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 269 days. Across the years with fuller monitoring, the share of Good days rose: an average of 75% in 1981–1983 versus 78% 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%1981: Good 188 of 288 days1981: Moderate 62 of 288 days1981: Unhealthy for Sensitive Groups 28 of 288 days1981: Unhealthy 9 of 288 days1981: Very Unhealthy 1 of 288 days19811982: Good 220 of 313 days1982: Moderate 66 of 313 days1982: Unhealthy for Sensitive Groups 26 of 313 days1982: Unhealthy 1 of 313 days1983: Good 267 of 303 days1983: Moderate 34 of 303 days1983: Unhealthy for Sensitive Groups 2 of 303 days1984: Good 310 of 348 days1984: Moderate 31 of 348 days1984: Unhealthy for Sensitive Groups 6 of 348 days1984: Unhealthy 1 of 348 days1985: Good 238 of 316 days1985: Moderate 57 of 316 days1985: Unhealthy for Sensitive Groups 15 of 316 days1985: Unhealthy 5 of 316 days1985: Very Unhealthy 1 of 316 days1986: Good 246 of 351 days1986: Moderate 91 of 351 days1986: Unhealthy for Sensitive Groups 13 of 351 days1986: Unhealthy 1 of 351 days19861987: Good 218 of 357 days1987: Moderate 88 of 357 days1987: Unhealthy for Sensitive Groups 46 of 357 days1987: Unhealthy 5 of 357 days1988: Good 229 of 359 days1988: Moderate 78 of 359 days1988: Unhealthy for Sensitive Groups 45 of 359 days1988: Unhealthy 7 of 359 days1989: Good 287 of 361 days1989: Moderate 54 of 361 days1989: Unhealthy for Sensitive Groups 18 of 361 days1989: Unhealthy 2 of 361 days1990: Good 271 of 360 days1990: Moderate 66 of 360 days1990: Unhealthy for Sensitive Groups 21 of 360 days1990: Unhealthy 2 of 360 days1991: Good 279 of 356 days1991: Moderate 66 of 356 days1991: Unhealthy for Sensitive Groups 8 of 356 days1991: Unhealthy 3 of 356 days19911992: Good 254 of 360 days1992: Moderate 88 of 360 days1992: Unhealthy for Sensitive Groups 17 of 360 days1992: Unhealthy 1 of 360 days1993: Good 273 of 355 days1993: Moderate 61 of 355 days1993: Unhealthy for Sensitive Groups 19 of 355 days1993: Unhealthy 2 of 355 days1994: Good 270 of 363 days1994: Moderate 75 of 363 days1994: Unhealthy for Sensitive Groups 17 of 363 days1994: Unhealthy 1 of 363 days1995: Good 270 of 360 days1995: Moderate 67 of 360 days1995: Unhealthy for Sensitive Groups 21 of 360 days1995: Unhealthy 2 of 360 days1996: Good 296 of 356 days1996: Moderate 49 of 356 days1996: Unhealthy for Sensitive Groups 10 of 356 days1996: Unhealthy 1 of 356 days19961997: Good 259 of 365 days1997: Moderate 80 of 365 days1997: Unhealthy for Sensitive Groups 25 of 365 days1997: Unhealthy 1 of 365 days1998: Good 240 of 364 days1998: Moderate 76 of 364 days1998: Unhealthy for Sensitive Groups 42 of 364 days1998: Unhealthy 6 of 364 days1999: Good 176 of 364 days1999: Moderate 147 of 364 days1999: Unhealthy for Sensitive Groups 36 of 364 days1999: Unhealthy 5 of 364 days2000: Good 203 of 363 days2000: Moderate 129 of 363 days2000: Unhealthy for Sensitive Groups 27 of 363 days2000: Unhealthy 4 of 363 days2001: Good 226 of 364 days2001: Moderate 119 of 364 days2001: Unhealthy for Sensitive Groups 19 of 364 days20012002: Good 240 of 363 days2002: Moderate 111 of 363 days2002: Unhealthy for Sensitive Groups 12 of 363 days2003: Good 231 of 362 days2003: Moderate 117 of 362 days2003: Unhealthy for Sensitive Groups 13 of 362 days2003: Unhealthy 1 of 362 days2004: Good 251 of 362 days2004: Moderate 103 of 362 days2004: Unhealthy for Sensitive Groups 8 of 362 days2005: Good 200 of 357 days2005: Moderate 134 of 357 days2005: Unhealthy for Sensitive Groups 22 of 357 days2005: Unhealthy 1 of 357 days2006: Good 200 of 364 days2006: Moderate 136 of 364 days2006: Unhealthy for Sensitive Groups 25 of 364 days2006: Unhealthy 3 of 364 days20062007: Good 225 of 355 days2007: Moderate 123 of 355 days2007: Unhealthy for Sensitive Groups 6 of 355 days2007: Unhealthy 1 of 355 days2008: Good 243 of 363 days2008: Moderate 115 of 363 days2008: Unhealthy for Sensitive Groups 5 of 363 days2009: Good 268 of 362 days2009: Moderate 91 of 362 days2009: Unhealthy for Sensitive Groups 3 of 362 days2010: Good 233 of 363 days2010: Moderate 119 of 363 days2010: Unhealthy for Sensitive Groups 11 of 363 days2011: Good 209 of 365 days2011: Moderate 138 of 365 days2011: Unhealthy for Sensitive Groups 18 of 365 days20112012: Good 234 of 363 days2012: Moderate 124 of 363 days2012: Unhealthy for Sensitive Groups 4 of 363 days2012: Unhealthy 1 of 363 days2013: Good 268 of 365 days2013: Moderate 95 of 365 days2013: Unhealthy for Sensitive Groups 2 of 365 days2014: Good 269 of 352 days2014: Moderate 83 of 352 days2015: Good 270 of 364 days2015: Moderate 94 of 364 days2016: Good 271 of 354 days2016: Moderate 83 of 354 days20162017: Good 269 of 351 days2017: Moderate 82 of 351 days2018: Good 267 of 361 days2018: Moderate 92 of 361 days2018: Unhealthy for Sensitive Groups 2 of 361 days2019: Good 271 of 356 days2019: Moderate 85 of 356 days2020: Good 289 of 349 days2020: Moderate 59 of 349 days2020: Unhealthy for Sensitive Groups 1 of 349 days2021: Good 289 of 362 days2021: Moderate 73 of 362 days20212022: Good 274 of 363 days2022: Moderate 88 of 363 days2022: Unhealthy for Sensitive Groups 1 of 363 days2023: Good 277 of 353 days2023: Moderate 76 of 353 days2024: Good 273 of 357 days2024: Moderate 83 of 357 days2024: Unhealthy for Sensitive Groups 1 of 357 days2025: Good 288 of 360 days2025: Moderate 72 of 360 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 year0501001501981: 90th percentile AQI 1081982: 90th percentile AQI 971983: 90th percentile AQI 511984: 90th percentile AQI 581985: 90th percentile AQI 801986: 90th percentile AQI 901987: 90th percentile AQI 1151988: 90th percentile AQI 1151989: 90th percentile AQI 741990: 90th percentile AQI 841991: 90th percentile AQI 801992: 90th percentile AQI 841993: 90th percentile AQI 841994: 90th percentile AQI 801995: 90th percentile AQI 871996: 90th percentile AQI 671997: 90th percentile AQI 901998: 90th percentile AQI 1081999: 90th percentile AQI 1052000: 90th percentile AQI 942001: 90th percentile AQI 812002: 90th percentile AQI 742003: 90th percentile AQI 742004: 90th percentile AQI 712005: 90th percentile AQI 902006: 90th percentile AQI 932007: 90th percentile AQI 712008: 90th percentile AQI 702009: 90th percentile AQI 612010: 90th percentile AQI 712011: 90th percentile AQI 872012: 90th percentile AQI 672013: 90th percentile AQI 622014: 90th percentile AQI 572015: 90th percentile AQI 622016: 90th percentile AQI 582017: 90th percentile AQI 592018: 90th percentile AQI 642019: 90th percentile AQI 592020: 90th percentile AQI 552021: 90th percentile AQI 562022: 90th percentile AQI 582023: 90th percentile AQI 612024: 90th percentile AQI 572025: 90th percentile AQI 571981: Median AQI 441982: Median AQI 411983: Median AQI 321984: Median AQI 311985: Median AQI 401986: Median AQI 411987: Median AQI 441988: Median AQI 441989: Median AQI 371990: Median AQI 391991: Median AQI 381992: Median AQI 411993: Median AQI 391994: Median AQI 391995: Median AQI 391996: Median AQI 381997: Median AQI 401998: Median AQI 441999: Median AQI 522000: Median AQI 472001: Median AQI 452002: Median AQI 442003: Median AQI 442004: Median AQI 432005: Median AQI 462006: Median AQI 482007: Median AQI 442008: Median AQI 422009: Median AQI 382010: Median AQI 442011: Median AQI 472012: Median AQI 432013: Median AQI 422014: Median AQI 382015: Median AQI 392016: Median AQI 382017: Median AQI 392018: Median AQI 392019: Median AQI 392020: Median AQI 362021: Median AQI 372022: Median AQI 402023: Median AQI 382024: Median AQI 412025: Median AQI 381981198619911996200120062011201620212025
  • 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
Ozone26975%
Fine particles (PM2.5)9125%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025360288720000385780Ozone
20243572738310004157101Ozone
20233532777600003861100Ozone
20223632748810004058108Ozone
2021362289730000375693Ozone
20203492895910003655126Ozone
2019356271850000395982Ozone
20183612679220003964128Ozone
20173512698200003959100Ozone
2016354271830000385884Ozone
2015364270940000396293Ozone
20143522698300003857100Ozone
20133652689520004262119Ozone
201236323412441004367185Ozone
2011365209138180004787147Ozone
2010363233119110004471143Ozone
20093622689130003861122Ozone
200836324311550004270136Ozone
200735522512361004471164Ozone
2006364200136253004893158Ozone
2005357200134221004690154Ozone
200436225110380004371136Ozone
2003362231117131004474151Ozone
2002363240111120004474134Ozone
2001364226119190004581150Ozone
2000363203129274004794190Ozone
19993641761473650052105161Ozone
1998364240764260044108192Ozone
199736525980251004090151Ozone
199635629649101003867161Ozone
199536027067212003987169Ozone
199436327075171003980154Ozone
199335527361192003984166Ozone
199236025488171004184154Ozone
19913562796683003880166Ozone
199036027166212003984154Ozone
198936128754182003774182Ozone
1988359229784570044115192Ozone
1987357218884650044115161Ozone
198635124691131004190151Ozone
198531623857155104080204Ozone
19843483103161003158164Ozone
19833032673420003251133Ozone
198231322066261004197159Ozone
1981288188622891044108201Ozone

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 Louisiana with a similar median AQI in 2025

All monitored counties in Louisiana

Source: U.S. EPA AirData, “Annual AQI by County” files for 1981–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem