Air Monitoring Data & AQI

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Ozone and PM2.5 Air Quality Index (AQI) Forecast

Issued: Wednesday, December 10, 2025, 2:33 PM

Wednesday, a weak cold front will produce moderate westerly to northwesterly winds during the day, gradually dispersing pollutants and carrying cleaner air into the Bayou State. However, pollutant carryover due to limited dispersion during the morning hours will result in high-Good to low-Moderate AQI levels. Thursday and Friday, calm to light southerly to southwesterly winds will hinder dispersion each day as the next surface ridge of high pressure settles over the state. In addition, morning and evening temperature inversions will confine pollutants near the surface, leading to continued high-Good to low-Moderate AQI levels on both days.

Baton Rouge

 Wednesday Thursday Friday
Ozone 34 - Good 33 - Good 35 - Good
PM25 60 - Moderate 53 - Moderate 56 - Moderate

Alexandria

 Wednesday Thursday Friday
Ozone 31 - Good 28 - Good 32 - Good
PM25 50 - Good 39 - Good 50 - Good

Lake Charles

 Wednesday Thursday Friday
Ozone 36 - Good 28 - Good 34 - Good
PM25 44 - Good 39 - Good 44 - Good

Lafayette

 Wednesday Thursday Friday
Ozone 34 - Good 29 - Good 32 - Good
PM25 50 - Good 44 - Good 50 - Good

Monroe

 Wednesday Thursday Friday
Ozone 26 - Good 23 - Good 28 - Good
PM25 50 - Good 33 - Good 39 - Good

New Orleans

 Wednesday Thursday Friday
Ozone 32 - Good 31 - Good 33 - Good
PM25 56 - Moderate 44 - Good 53 - Moderate

Shreveport

 Wednesday Thursday Friday
Ozone 24 - Good 22 - Good 30 - Good
PM25 44 - Good 50 - Good 53 - Moderate

Thibodaux

 Wednesday Thursday Friday
Ozone 31 - Good 28 - Good 31 - Good
PM25 44 - Good 39 - Good 44 - Good

More Information About Understanding AQI Information

The AQI is an index for reporting daily air quality. It tells you how clean or unhealthy your air is, and what associated health effects might be a concern. The AQI focuses on health effects you may experience within a few hours or days after breathing unhealthy air. The following chart provides information regarding the AQI determinations:

Category AQI Value What This Means
Good 0-50 Air quality is considered satisfactory, and air pollution poses little or no risk.
Moderate 51-100 Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
Unhealthy for Sensitive Groups 101-150 Members of sensitive groups may experience health effects. The general public is not likely to be affected.
Unhealthy 151-200 Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
Very Unhealthy 201-300 Health warnings of emergency conditions. The entire population is more likely to be affected.
Hazardous 301-500 Health alert: everyone may experience more serious health effects.

Any questions about interpreting this monitoring data should be directed to the DEQ Customer Services Section at 1-866-896-5337.

TO REPORT ENVIRONMENTAL CONCERNS, INCLUDING ODORS, CONTACT THE DEQ SINGLE POINT OF CONTACT (SPOC) - 225-219-3640 or Toll Free 1-888-763-5424. In the event of an environmental emergency, citizens are encouraged to first contact their local authorities - police, sheriff, fire department, etc. Otherwise citizens and the regulated community can contact the SPOC line to report environmental concerns during business hours, 8 a.m. - 4:30 p.m., Monday through Friday at the number listed above. To report a concern outside of business hours call 225-342-1234 or the toll free number. Concerns include spills, releases, odors, fish kills, open burning, waste tires and any other types of environmental incidents. Citizens can report the incident online.

The data has not been quality reviewed or validated. Continuous PM2.5 readings shown are not NAAQS comparable.