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

Issued: Friday, June 19, 2026, 2:32 PM

Friday, light winds will allow pollutants to accumulate across Louisiana, while humid conditions promote particle formation. In addition, thin regional smoke will contribute to particle levels. Therefore, despite areas of showers and thunderstorms aiding dispersion during the afternoon and evening, AQI levels will remain low-Moderate due to PM2.5. Saturday and Sunday, periods of showers and thunderstorms will enhance atmospheric mixing as a humid and unstable air mass remains over the state. However, light southerly winds will continue to carry thin regional smoke into the Deep South, keeping particle levels elevated. As a result, AQI levels will be high-Good to low-Moderate on both days.

Baton Rouge

 Friday Saturday Sunday
Ozone 28 - Good 31 - Good 29 - Good
PM25 60 - Moderate 58 - Moderate 56 - Moderate

Alexandria

 Friday Saturday Sunday
Ozone 31 - Good 28 - Good 23 - Good
PM25 58 - Moderate 50 - Good 44 - Good

Lake Charles

 Friday Saturday Sunday
Ozone 24 - Good 23 - Good 24 - Good
PM25 64 - Moderate 62 - Moderate 60 - Moderate

Lafayette

 Friday Saturday Sunday
Ozone 19 - Good 21 - Good 23 - Good
PM25 62 - Moderate 62 - Moderate 58 - Moderate

Monroe

 Friday Saturday Sunday
Ozone 27 - Good 26 - Good 22 - Good
PM25 56 - Moderate 44 - Good 50 - Good

New Orleans

 Friday Saturday Sunday
Ozone 31 - Good 32 - Good 31 - Good
PM25 60 - Moderate 58 - Moderate 56 - Moderate

Shreveport

 Friday Saturday Sunday
Ozone 25 - Good 39 - Good 20 - Good
PM25 62 - Moderate 53 - Moderate 53 - Moderate

Thibodaux

 Friday Saturday Sunday
Ozone 18 - Good 19 - Good 23 - Good
PM25 64 - Moderate 60 - Moderate 58 - 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.