Air Monitoring Data & AQI

« Back to DEQ's Main Website

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

Issued: Friday, November 7, 2025, 2:32 PM

Friday, as a weak cold front approaches from the northwest, atmospheric mixing will increase slightly, while areas of cloud cover will inhibit ozone formation. In addition, periods of moderate southwesterly winds will aid pollutant dispersion. Thus, AQI levels will be high-Good in most cities. Saturday, as the weak cold front stalls over Louisiana, light and variable winds throughout the day will hinder dispersion, and areas of patchy morning fog will enhance particle production. Therefore, AQI levels will be high-Good to low-Moderate. Sunday, as the cold front departs to the southeast and strong surface high pressure builds over the Plains, moderate and gusty northerly winds will develop across the Bayou State, dispersing pollutants and bringing clean, cool air into the region. As a result, AQI levels will be Good statewide.

Baton Rouge

 Friday Saturday Sunday
Ozone 44 - Good 47 - Good 37 - Good
PM25 50 - Good 55 - Moderate 44 - Good

Alexandria

 Friday Saturday Sunday
Ozone 41 - Good 44 - Good 34 - Good
PM25 39 - Good 50 - Good 33 - Good

Lake Charles

 Friday Saturday Sunday
Ozone 44 - Good 45 - Good 33 - Good
PM25 39 - Good 50 - Good 39 - Good

Lafayette

 Friday Saturday Sunday
Ozone 39 - Good 44 - Good 35 - Good
PM25 44 - Good 53 - Moderate 39 - Good

Monroe

 Friday Saturday Sunday
Ozone 36 - Good 42 - Good 32 - Good
PM25 39 - Good 44 - Good 33 - Good

New Orleans

 Friday Saturday Sunday
Ozone 41 - Good 46 - Good 34 - Good
PM25 39 - Good 50 - Good 44 - Good

Shreveport

 Friday Saturday Sunday
Ozone 36 - Good 44 - Good 34 - Good
PM25 44 - Good 55 - Moderate 39 - Good

Thibodaux

 Friday Saturday Sunday
Ozone 33 - Good 41 - Good 32 - Good
PM25 39 - Good 50 - Good 33 - 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.