Air Monitoring Data & AQI

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

Issued: Saturday, December 6, 2025, 2:30 PM

Saturday, calm to light easterly to southeasterly winds will limit pollutant dispersion. However, pollutant carryover from the overnight hours will be low. These conditions will yield Good to high-Good AQI levels. Sunday, calm to light easterly to east-southeasterly morning winds will allow pollutants to linger over Louisiana, and a morning inversion will trap pollutants near the ground. By the afternoon, a passing cold front will generate north-northwesterly winds, which will carry smoke from agricultural fires in the central and southern Plains into the state. Therefore, despite scattered showers and thunderstorms, AQI levels will increase to low-Moderate statewide. Monday, light to moderate northerly winds behind the front will persist, aiding dispersion and transporting cleaner, cooler air into Louisiana. As a result, AQI levels will improve to high-Good statewide.

Baton Rouge

 Saturday Sunday Monday
Ozone 23 - Good 21 - Good 25 - Good
PM25 39 - Good 53 - Moderate 44 - Good

Alexandria

 Saturday Sunday Monday
Ozone 23 - Good 21 - Good 25 - Good
PM25 39 - Good 55 - Moderate 44 - Good

Lake Charles

 Saturday Sunday Monday
Ozone 18 - Good 16 - Good 19 - Good
PM25 39 - Good 53 - Moderate 44 - Good

Lafayette

 Saturday Sunday Monday
Ozone 18 - Good 16 - Good 19 - Good
PM25 39 - Good 53 - Moderate 44 - Good

Monroe

 Saturday Sunday Monday
Ozone 28 - Good 26 - Good 30 - Good
PM25 44 - Good 56 - Moderate 50 - Good

New Orleans

 Saturday Sunday Monday
Ozone 19 - Good 17 - Good 20 - Good
PM25 44 - Good 53 - Moderate 44 - Good

Shreveport

 Saturday Sunday Monday
Ozone 28 - Good 26 - Good 30 - Good
PM25 50 - Good 56 - Moderate 50 - Good

Thibodaux

 Saturday Sunday Monday
Ozone 17 - Good 15 - Good 19 - Good
PM25 44 - Good 53 - Moderate 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.