EnviroNearby

Livingston Parish, Louisiana air quality history

Daily Air Quality Index summaries from EPA monitors in Livingston, Louisiana, 1992–2025.

62%
Good days in 2025
45
Median daily AQI, 2025
0
Days above 100 in 2025
363
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Livingston, Louisiana on 363 days. 225 of those days (62%) were in the Good range, and the median daily AQI was 45. That median is higher than the typical monitored county in Louisiana (median 42 across 21 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 237 days. Across the years with fuller monitoring, the share of Good days fell: an average of 82% in 1992–1994 versus 54% 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%1992: Good 313 of 346 days1992: Moderate 25 of 346 days1992: Unhealthy for Sensitive Groups 7 of 346 days1992: Unhealthy 1 of 346 days19921993: Good 266 of 363 days1993: Moderate 70 of 363 days1993: Unhealthy for Sensitive Groups 23 of 363 days1993: Unhealthy 3 of 363 days1993: Very Unhealthy 1 of 363 days1994: Good 300 of 361 days1994: Moderate 50 of 361 days1994: Unhealthy for Sensitive Groups 7 of 361 days1994: Unhealthy 4 of 361 days1995: Good 283 of 360 days1995: Moderate 51 of 360 days1995: Unhealthy for Sensitive Groups 21 of 360 days1995: Unhealthy 5 of 360 days1996: Good 285 of 365 days1996: Moderate 54 of 365 days1996: Unhealthy for Sensitive Groups 21 of 365 days1996: Unhealthy 5 of 365 days1997: Good 262 of 362 days1997: Moderate 74 of 362 days1997: Unhealthy for Sensitive Groups 22 of 362 days1997: Unhealthy 4 of 362 days19971998: Good 269 of 364 days1998: Moderate 74 of 364 days1998: Unhealthy for Sensitive Groups 13 of 364 days1998: Unhealthy 8 of 364 days1999: Good 237 of 335 days1999: Moderate 62 of 335 days1999: Unhealthy for Sensitive Groups 31 of 335 days1999: Unhealthy 5 of 335 days2000: Good 172 of 365 days2000: Moderate 145 of 365 days2000: Unhealthy for Sensitive Groups 36 of 365 days2000: Unhealthy 11 of 365 days2000: Very Unhealthy 1 of 365 days2001: Good 164 of 365 days2001: Moderate 189 of 365 days2001: Unhealthy for Sensitive Groups 11 of 365 days2001: Unhealthy 1 of 365 days2002: Good 209 of 365 days2002: Moderate 143 of 365 days2002: Unhealthy for Sensitive Groups 12 of 365 days2002: Unhealthy 1 of 365 days20022003: Good 144 of 365 days2003: Moderate 203 of 365 days2003: Unhealthy for Sensitive Groups 16 of 365 days2003: Unhealthy 2 of 365 days2004: Good 187 of 354 days2004: Moderate 159 of 354 days2004: Unhealthy for Sensitive Groups 8 of 354 days2005: Good 139 of 361 days2005: Moderate 207 of 361 days2005: Unhealthy for Sensitive Groups 14 of 361 days2005: Unhealthy 1 of 361 days2006: Good 151 of 365 days2006: Moderate 190 of 365 days2006: Unhealthy for Sensitive Groups 22 of 365 days2006: Unhealthy 2 of 365 days2007: Good 148 of 364 days2007: Moderate 194 of 364 days2007: Unhealthy for Sensitive Groups 21 of 364 days2007: Unhealthy 1 of 364 days20072008: Good 178 of 358 days2008: Moderate 172 of 358 days2008: Unhealthy for Sensitive Groups 8 of 358 days2009: Good 213 of 365 days2009: Moderate 145 of 365 days2009: Unhealthy for Sensitive Groups 5 of 365 days2009: Unhealthy 2 of 365 days2010: Good 190 of 365 days2010: Moderate 165 of 365 days2010: Unhealthy for Sensitive Groups 8 of 365 days2010: Unhealthy 2 of 365 days2011: Good 206 of 363 days2011: Moderate 145 of 363 days2011: Unhealthy for Sensitive Groups 12 of 363 days2012: Good 231 of 361 days2012: Moderate 125 of 361 days2012: Unhealthy for Sensitive Groups 5 of 361 days20122013: Good 245 of 365 days2013: Moderate 117 of 365 days2013: Unhealthy for Sensitive Groups 3 of 365 days2014: Good 136 of 364 days2014: Moderate 222 of 364 days2014: Unhealthy for Sensitive Groups 6 of 364 days2015: Good 146 of 365 days2015: Moderate 217 of 365 days2015: Unhealthy for Sensitive Groups 2 of 365 days2016: Good 159 of 359 days2016: Moderate 198 of 359 days2016: Unhealthy for Sensitive Groups 2 of 359 days2017: Good 204 of 365 days2017: Moderate 158 of 365 days2017: Unhealthy for Sensitive Groups 3 of 365 days20172018: Good 212 of 365 days2018: Moderate 153 of 365 days2019: Good 198 of 365 days2019: Moderate 167 of 365 days2020: Good 206 of 355 days2020: Moderate 148 of 355 days2020: Unhealthy for Sensitive Groups 1 of 355 days2021: Good 186 of 348 days2021: Moderate 161 of 348 days2021: Unhealthy for Sensitive Groups 1 of 348 days2022: Good 177 of 361 days2022: Moderate 181 of 361 days2022: Unhealthy for Sensitive Groups 3 of 361 days20222023: Good 134 of 364 days2023: Moderate 225 of 364 days2023: Unhealthy for Sensitive Groups 5 of 364 days2024: Good 235 of 366 days2024: Moderate 131 of 366 days2025: Good 225 of 363 days2025: Moderate 138 of 363 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 year0501001501992: 90th percentile AQI 501993: 90th percentile AQI 901994: 90th percentile AQI 741995: 90th percentile AQI 871996: 90th percentile AQI 871997: 90th percentile AQI 931998: 90th percentile AQI 901999: 90th percentile AQI 1012000: 90th percentile AQI 1082001: 90th percentile AQI 772002: 90th percentile AQI 742003: 90th percentile AQI 792004: 90th percentile AQI 702005: 90th percentile AQI 842006: 90th percentile AQI 872007: 90th percentile AQI 842008: 90th percentile AQI 792009: 90th percentile AQI 672010: 90th percentile AQI 692011: 90th percentile AQI 712012: 90th percentile AQI 672013: 90th percentile AQI 622014: 90th percentile AQI 702015: 90th percentile AQI 672016: 90th percentile AQI 642017: 90th percentile AQI 622018: 90th percentile AQI 622019: 90th percentile AQI 632020: 90th percentile AQI 622021: 90th percentile AQI 622022: 90th percentile AQI 662023: 90th percentile AQI 702024: 90th percentile AQI 642025: 90th percentile AQI 591992: Median AQI 171993: Median AQI 401994: Median AQI 341995: Median AQI 361996: Median AQI 361997: Median AQI 391998: Median AQI 401999: Median AQI 402000: Median AQI 522001: Median AQI 522002: Median AQI 462003: Median AQI 532004: Median AQI 492005: Median AQI 552006: Median AQI 532007: Median AQI 542008: Median AQI 512009: Median AQI 472010: Median AQI 492011: Median AQI 472012: Median AQI 442013: Median AQI 442014: Median AQI 532015: Median AQI 532016: Median AQI 512017: Median AQI 482018: Median AQI 462019: Median AQI 482020: Median AQI 472021: Median AQI 482022: Median AQI 512023: Median AQI 542024: Median AQI 442025: Median AQI 4519921997200220072012201720222025
  • 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)23765%
Ozone12434%
Nitrogen dioxide (NO₂)21%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253632251380000455990PM2.5
202436623513100004464100PM2.5
202336413422550005470133PM2.5
202236117718130005166117PM2.5
202134818616110004862133PM2.5
202035520614810004762105PM2.5
20193651981670000486397PM2.5
201836521215300004662100PM2.5
201736520415830004862112PM2.5
201635915919820005164112PM2.5
201536514621720005367112PM2.5
201436413622260005370122PM2.5
201336524511730004462129Ozone
201236123112550004467133Ozone
2011363206145120004771150PM2.5
201036519016582004969192PM2.5
200936521314552004767172PM2.5
200835817817280005179126PM2.5
2007364148194211005484154PM2.5
2006365151190222005387172PM2.5
2005361139207141005584156PM2.5
200435418715980004970143PM2.5
2003365144203162005379182PM2.5
2002365209143121004674154Ozone
2001365164189111005277151PM2.5
200036517214536111052108213Ozone
1999335237623150040101177Ozone
199836426974138004090187Ozone
199736226274224003993190Ozone
199636528554215003687179Ozone
199536028351215003687172Ozone
19943613005074003474187Ozone
199336326670233104090203Ozone
19923463132571001750161NO2

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 1992–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem