EnviroNearby

Iberville Parish, Louisiana air quality history

Daily Air Quality Index summaries from EPA monitors in Iberville, Louisiana, 1980–2025.

79%
Good days in 2025
40
Median daily AQI, 2025
1
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 Iberville, Louisiana on 365 days. 287 of those days (79%) were in the Good range, and the median daily AQI was 40. That median is about the same as 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 303 days. Across the years with fuller monitoring, the share of Good days fell: an average of 80% in 1980–1982 versus 74% 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 203 of 284 days1980: Moderate 41 of 284 days1980: Unhealthy for Sensitive Groups 25 of 284 days1980: Unhealthy 7 of 284 days1980: Very Unhealthy 8 of 284 days19801981: Good 277 of 340 days1981: Moderate 42 of 340 days1981: Unhealthy for Sensitive Groups 17 of 340 days1981: Unhealthy 3 of 340 days1981: Very Unhealthy 1 of 340 days1982: Good 301 of 347 days1982: Moderate 28 of 347 days1982: Unhealthy for Sensitive Groups 11 of 347 days1982: Unhealthy 6 of 347 days1982: Very Unhealthy 1 of 347 days1983: Good 298 of 348 days1983: Moderate 29 of 348 days1983: Unhealthy for Sensitive Groups 12 of 348 days1983: Unhealthy 9 of 348 days1984: Good 303 of 359 days1984: Moderate 39 of 359 days1984: Unhealthy for Sensitive Groups 13 of 359 days1984: Unhealthy 4 of 359 days1985: Good 290 of 358 days1985: Moderate 43 of 358 days1985: Unhealthy for Sensitive Groups 16 of 358 days1985: Unhealthy 8 of 358 days1985: Very Unhealthy 1 of 358 days19851986: Good 268 of 362 days1986: Moderate 67 of 362 days1986: Unhealthy for Sensitive Groups 22 of 362 days1986: Unhealthy 4 of 362 days1986: Very Unhealthy 1 of 362 days1987: Good 233 of 350 days1987: Moderate 68 of 350 days1987: Unhealthy for Sensitive Groups 37 of 350 days1987: Unhealthy 10 of 350 days1987: Very Unhealthy 2 of 350 days1988: Good 257 of 356 days1988: Moderate 61 of 356 days1988: Unhealthy for Sensitive Groups 26 of 356 days1988: Unhealthy 11 of 356 days1988: Very Unhealthy 1 of 356 days1989: Good 287 of 362 days1989: Moderate 50 of 362 days1989: Unhealthy for Sensitive Groups 16 of 362 days1989: Unhealthy 8 of 362 days1989: Very Unhealthy 1 of 362 days1990: Good 264 of 363 days1990: Moderate 59 of 363 days1990: Unhealthy for Sensitive Groups 28 of 363 days1990: Unhealthy 7 of 363 days1990: Very Unhealthy 5 of 363 days19901991: Good 294 of 363 days1991: Moderate 46 of 363 days1991: Unhealthy for Sensitive Groups 20 of 363 days1991: Unhealthy 3 of 363 days1992: Good 243 of 364 days1992: Moderate 81 of 364 days1992: Unhealthy for Sensitive Groups 36 of 364 days1992: Unhealthy 4 of 364 days1993: Good 264 of 365 days1993: Moderate 70 of 365 days1993: Unhealthy for Sensitive Groups 18 of 365 days1993: Unhealthy 13 of 365 days1994: Good 272 of 365 days1994: Moderate 61 of 365 days1994: Unhealthy for Sensitive Groups 25 of 365 days1994: Unhealthy 5 of 365 days1994: Very Unhealthy 2 of 365 days1995: Good 247 of 365 days1995: Moderate 64 of 365 days1995: Unhealthy for Sensitive Groups 36 of 365 days1995: Unhealthy 17 of 365 days1995: Very Unhealthy 1 of 365 days19951996: Good 288 of 366 days1996: Moderate 49 of 366 days1996: Unhealthy for Sensitive Groups 19 of 366 days1996: Unhealthy 8 of 366 days1996: Very Unhealthy 2 of 366 days1997: Good 243 of 365 days1997: Moderate 67 of 365 days1997: Unhealthy for Sensitive Groups 39 of 365 days1997: Unhealthy 14 of 365 days1997: Very Unhealthy 2 of 365 days1998: Good 274 of 365 days1998: Moderate 53 of 365 days1998: Unhealthy for Sensitive Groups 23 of 365 days1998: Unhealthy 14 of 365 days1998: Very Unhealthy 1 of 365 days1999: Good 212 of 365 days1999: Moderate 106 of 365 days1999: Unhealthy for Sensitive Groups 34 of 365 days1999: Unhealthy 12 of 365 days1999: Very Unhealthy 1 of 365 days2000: Good 220 of 366 days2000: Moderate 91 of 366 days2000: Unhealthy for Sensitive Groups 33 of 366 days2000: Unhealthy 21 of 366 days2000: Very Unhealthy 1 of 366 days20002001: Good 231 of 365 days2001: Moderate 109 of 365 days2001: Unhealthy for Sensitive Groups 19 of 365 days2001: Unhealthy 6 of 365 days2002: Good 243 of 365 days2002: Moderate 111 of 365 days2002: Unhealthy for Sensitive Groups 10 of 365 days2002: Unhealthy 1 of 365 days2003: Good 215 of 365 days2003: Moderate 116 of 365 days2003: Unhealthy for Sensitive Groups 24 of 365 days2003: Unhealthy 10 of 365 days2004: Good 223 of 366 days2004: Moderate 117 of 366 days2004: Unhealthy for Sensitive Groups 22 of 366 days2004: Unhealthy 4 of 366 days2005: Good 186 of 365 days2005: Moderate 132 of 365 days2005: Unhealthy for Sensitive Groups 37 of 365 days2005: Unhealthy 10 of 365 days20052006: Good 200 of 365 days2006: Moderate 130 of 365 days2006: Unhealthy for Sensitive Groups 29 of 365 days2006: Unhealthy 6 of 365 days2007: Good 202 of 365 days2007: Moderate 130 of 365 days2007: Unhealthy for Sensitive Groups 27 of 365 days2007: Unhealthy 6 of 365 days2008: Good 233 of 361 days2008: Moderate 112 of 361 days2008: Unhealthy for Sensitive Groups 15 of 361 days2008: Unhealthy 1 of 361 days2009: Good 253 of 365 days2009: Moderate 104 of 365 days2009: Unhealthy for Sensitive Groups 7 of 365 days2009: Unhealthy 1 of 365 days2010: Good 223 of 365 days2010: Moderate 124 of 365 days2010: Unhealthy for Sensitive Groups 18 of 365 days20102011: Good 233 of 365 days2011: Moderate 111 of 365 days2011: Unhealthy for Sensitive Groups 18 of 365 days2011: Unhealthy 3 of 365 days2012: Good 256 of 363 days2012: Moderate 94 of 363 days2012: Unhealthy for Sensitive Groups 13 of 363 days2013: Good 273 of 365 days2013: Moderate 87 of 365 days2013: Unhealthy for Sensitive Groups 5 of 365 days2014: Good 272 of 365 days2014: Moderate 92 of 365 days2014: Unhealthy for Sensitive Groups 1 of 365 days2015: Good 303 of 365 days2015: Moderate 53 of 365 days2015: Unhealthy for Sensitive Groups 9 of 365 days20152016: Good 290 of 366 days2016: Moderate 74 of 366 days2016: Unhealthy for Sensitive Groups 2 of 366 days2017: Good 290 of 365 days2017: Moderate 74 of 365 days2017: Unhealthy for Sensitive Groups 1 of 365 days2018: Good 279 of 365 days2018: Moderate 78 of 365 days2018: Unhealthy for Sensitive Groups 7 of 365 days2018: Unhealthy 1 of 365 days2019: Good 290 of 365 days2019: Moderate 71 of 365 days2019: Unhealthy for Sensitive Groups 4 of 365 days2020: Good 306 of 366 days2020: Moderate 57 of 366 days2020: Unhealthy for Sensitive Groups 3 of 366 days20202021: Good 299 of 365 days2021: Moderate 63 of 365 days2021: Unhealthy for Sensitive Groups 3 of 365 days2022: Good 267 of 365 days2022: Moderate 91 of 365 days2022: Unhealthy for Sensitive Groups 6 of 365 days2022: Unhealthy 1 of 365 days2023: Good 253 of 365 days2023: Moderate 99 of 365 days2023: Unhealthy for Sensitive Groups 12 of 365 days2023: Unhealthy 1 of 365 days2024: Good 270 of 365 days2024: Moderate 86 of 365 days2024: Unhealthy for Sensitive Groups 8 of 365 days2024: Unhealthy 1 of 365 days2025: Good 287 of 365 days2025: Moderate 77 of 365 days2025: Unhealthy for Sensitive Groups 1 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 1191981: 90th percentile AQI 801982: 90th percentile AQI 641983: 90th percentile AQI 741984: 90th percentile AQI 741985: 90th percentile AQI 871986: 90th percentile AQI 901987: 90th percentile AQI 1191988: 90th percentile AQI 1051989: 90th percentile AQI 841990: 90th percentile AQI 1051991: 90th percentile AQI 801992: 90th percentile AQI 1051993: 90th percentile AQI 931994: 90th percentile AQI 971995: 90th percentile AQI 1261996: 90th percentile AQI 901997: 90th percentile AQI 1291998: 90th percentile AQI 1051999: 90th percentile AQI 1122000: 90th percentile AQI 1292001: 90th percentile AQI 902002: 90th percentile AQI 712003: 90th percentile AQI 972004: 90th percentile AQI 902005: 90th percentile AQI 1122006: 90th percentile AQI 1002007: 90th percentile AQI 932008: 90th percentile AQI 822009: 90th percentile AQI 712010: 90th percentile AQI 842011: 90th percentile AQI 872012: 90th percentile AQI 672013: 90th percentile AQI 612014: 90th percentile AQI 612015: 90th percentile AQI 582016: 90th percentile AQI 582017: 90th percentile AQI 602018: 90th percentile AQI 662019: 90th percentile AQI 592020: 90th percentile AQI 562021: 90th percentile AQI 582022: 90th percentile AQI 712023: 90th percentile AQI 842024: 90th percentile AQI 712025: 90th percentile AQI 611980: Median AQI 371981: Median AQI 351982: Median AQI 281983: Median AQI 271984: Median AQI 281985: Median AQI 331986: Median AQI 391987: Median AQI 421988: Median AQI 391989: Median AQI 351990: Median AQI 381991: Median AQI 341992: Median AQI 421993: Median AQI 411994: Median AQI 381995: Median AQI 401996: Median AQI 381997: Median AQI 411998: Median AQI 401999: Median AQI 472000: Median AQI 452001: Median AQI 442002: Median AQI 422003: Median AQI 452004: Median AQI 442005: Median AQI 502006: Median AQI 472007: Median AQI 462008: Median AQI 422009: Median AQI 432010: Median AQI 452011: Median AQI 432012: Median AQI 422013: Median AQI 402014: Median AQI 392015: Median AQI 352016: Median AQI 402017: Median AQI 402018: Median AQI 382019: Median AQI 382020: Median AQI 382021: Median AQI 392022: Median AQI 422023: Median AQI 442024: Median AQI 412025: Median AQI 401980198519901995200020052010201520202025
  • 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
Ozone30383%
Fine particles (PM2.5)6217%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652877710004061105Ozone
20243652708681004171159Ozone
202336525399121004484154Ozone
20223652679161004271156Ozone
20213652996330003958129Ozone
20203663065730003856136Ozone
20193652907140003859119Ozone
20183652797871003866153Ozone
20173652907410004060112Ozone
20163662907420004058101Ozone
20153653035390003558133Ozone
20143652729210003961119Ozone
20133652738750004061140Ozone
201236325694130004267122Ozone
2011365233111183004387159Ozone
2010365223124180004584140Ozone
200936525310471004371164Ozone
2008361233112151004282151Ozone
2007365202130276004693187Ozone
20063652001302960047100172Ozone
200536518613237100050112200Ozone
2004366223117224004490177Ozone
20033652151162410004597200Ozone
2002365243111101004271169Ozone
2001365231109196004490182Ozone
20003662209133211045129201Ozone
199936521210634121047112213Ozone
19983652745323141040105201Ozone
19973652436739142041129210Ozone
199636628849198203890216Ozone
19953652476436171040126204Ozone
199436527261255203897202Ozone
1993365264701813004193174Ozone
1992364243813640042105185Ozone
199136329446203003480174Ozone
1990363264592875038105212Ozone
198936228750168103584204Ozone
19883562576126111039105205Ozone
19873502336837102042119203Ozone
198636226867224103990201Ozone
198535829043168103387203Ozone
198435930339134002874174Ozone
198334829829129002774190Ozone
198234730128116102864240Ozone
198134027742173103580213Ozone
1980284203412578037119244Ozone

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 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