Air Monitoring Data & AQI

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

Issued: Saturday, November 15, 2025, 2:32 PM

Saturday, as an upper-level ridge of high pressure moves toward the Bayou State, atmospheric mixing will decrease, and mostly sunny skies with warm afternoon temperatures will support ozone formation. In addition, smoke from scattered agricultural fires will increase particle concentrations in some areas. These conditions will yield low-Moderate AQI levels in southeastern Louisiana, with Good to high-Good AQI levels elsewhere. Sunday and Monday, as the upper-level ridge sets up over Louisiana, mixing will be inhibited. Additionally, morning inversions will confine pollutants near the ground, while calm to light winds will hinder dispersion of pollutants and lingering smoke. Furthermore, partly to mostly sunny skies will aid ozone development. Thus, AQI levels will be high-Good to low-Moderate in most cities on both days.

Baton Rouge

 Saturday Sunday Monday
Ozone 50 - Good 47 - Good 46 - Good
PM25 56 - Moderate 60 - Moderate 64 - Moderate

Alexandria

 Saturday Sunday Monday
Ozone 42 - Good 39 - Good 38 - Good
PM25 44 - Good 53 - Moderate 56 - Moderate

Lake Charles

 Saturday Sunday Monday
Ozone 41 - Good 38 - Good 37 - Good
PM25 39 - Good 50 - Good 55 - Moderate

Lafayette

 Saturday Sunday Monday
Ozone 44 - Good 41 - Good 40 - Good
PM25 39 - Good 50 - Good 55 - Moderate

Monroe

 Saturday Sunday Monday
Ozone 39 - Good 36 - Good 35 - Good
PM25 28 - Good 39 - Good 50 - Good

New Orleans

 Saturday Sunday Monday
Ozone 54 - Moderate 47 - Good 46 - Good
PM25 53 - Moderate 58 - Moderate 62 - Moderate

Shreveport

 Saturday Sunday Monday
Ozone 39 - Good 36 - Good 35 - Good
PM25 28 - Good 39 - Good 50 - Good

Thibodaux

 Saturday Sunday Monday
Ozone 44 - Good 42 - Good 41 - Good
PM25 53 - Moderate 56 - Moderate 60 - Moderate

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.