Air Monitoring Data & AQI

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

Issued: Thursday, February 5, 2026, 2:32 PM

Thursday, an approaching ridge of high pressure aloft will gradually limit mixing throughout the day. However, moderate westerly to west-northwesterly surface winds will aid pollutant dispersion across the Bayou State. Therefore, AQI levels will be Good to high-Good. Friday, a morning inversion will trap pollutants near the ground. Furthermore, lighter westerly to west-southwesterly winds will inhibit dispersion, while sunny skies and temperatures in the low- to mid-70s will enhance ozone formation. These conditions will yield high-Good to low-Moderate AQI levels. Saturday, mixing will continue to be limited by a ridge of high pressure aloft west of the state. However, winds will strengthen and shift to north-northeasterly, aiding dispersion. Furthermore, slightly cooler temperatures will decrease ozone development. Thus, AQI levels will be Good to high-Good.

Baton Rouge

 Thursday Friday Saturday
Ozone 43 - Good 54 - Moderate 46 - Good
PM25 44 - Good 53 - Moderate 39 - Good

Alexandria

 Thursday Friday Saturday
Ozone 37 - Good 46 - Good 41 - Good
PM25 39 - Good 50 - Good 33 - Good

Lake Charles

 Thursday Friday Saturday
Ozone 38 - Good 49 - Good 44 - Good
PM25 39 - Good 55 - Moderate 44 - Good

Lafayette

 Thursday Friday Saturday
Ozone 39 - Good 49 - Good 44 - Good
PM25 28 - Good 44 - Good 33 - Good

Monroe

 Thursday Friday Saturday
Ozone 37 - Good 45 - Good 40 - Good
PM25 39 - Good 50 - Good 33 - Good

New Orleans

 Thursday Friday Saturday
Ozone 43 - Good 51 - Moderate 45 - Good
PM25 39 - Good 53 - Moderate 39 - Good

Shreveport

 Thursday Friday Saturday
Ozone 35 - Good 45 - Good 40 - Good
PM25 39 - Good 50 - Good 33 - Good

Thibodaux

 Thursday Friday Saturday
Ozone 38 - Good 47 - Good 42 - Good
PM25 44 - Good 53 - Moderate 39 - 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.