Air Monitoring Data & AQI

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

Issued: Thursday, May 8, 2025, 2:32 PM

Thursday, as a surface ridge of high pressure stretches across southern Louisiana, mostly sunny skies and warm temperatures will enhance ozone development. In addition, light and variable winds will hinder dispersion. As a result, AQI levels will be high-Good to low-Moderate. Friday, a trough of low pressure aloft will enhance atmospheric mixing, while cloud cover and periods of rain limit ozone formation. Therefore, despite light winds hindering dispersion, AQI levels will be Good to high-Good. Saturday, partly to mostly cloudy skies will continue to hinder ozone development as the area of low pressure aloft stalls over Louisiana. Furthermore, moderate north-northeasterly winds will aid dispersion and transport clean air into the Bayou State. As a result, AQI levels will continue to be Good to high-Good.

Baton Rouge

 Thursday Friday Saturday
Ozone 67 - Moderate 43 - Good 44 - Good
PM25 53 - Moderate 50 - Good 39 - Good

Alexandria

 Thursday Friday Saturday
Ozone 47 - Good 41 - Good 42 - Good
PM25 39 - Good 33 - Good 33 - Good

Lake Charles

 Thursday Friday Saturday
Ozone 54 - Moderate 44 - Good 47 - Good
PM25 33 - Good 28 - Good 28 - Good

Lafayette

 Thursday Friday Saturday
Ozone 51 - Moderate 47 - Good 45 - Good
PM25 44 - Good 39 - Good 28 - Good

Monroe

 Thursday Friday Saturday
Ozone 49 - Good 39 - Good 37 - Good
PM25 33 - Good 28 - Good 28 - Good

New Orleans

 Thursday Friday Saturday
Ozone 51 - Moderate 40 - Good 42 - Good
PM25 39 - Good 44 - Good 39 - Good

Shreveport

 Thursday Friday Saturday
Ozone 51 - Moderate 41 - Good 39 - Good
PM25 33 - Good 28 - Good 28 - Good

Thibodaux

 Thursday Friday Saturday
Ozone 44 - Good 37 - Good 40 - Good
PM25 44 - Good 33 - 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.