Air Monitoring Data & AQI

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

Issued: Monday, June 23, 2025, 2:32 PM

Monday and Tuesday, light southeasterly to easterly winds will limit pollutant dispersion. Additionally, periods of sunshine and temperatures in the low- to mid-90s will continue to promote ozone formation. However, humid conditions will lead to afternoon clouds and isolated to scattered thunderstorms, limiting ozone production. As a result, AQI levels will be high-Good to low-Moderate on both days. Wednesday, a slight decrease in humidity will promote sunny skies and warm temperatures, with highs in the mid-90s enhancing ozone production. Furthermore, calm to light southeasterly winds will hinder dispersion, leading to high-Good to mid-Moderate AQI levels.

Baton Rouge

 Monday Tuesday Wednesday
Ozone 48 - Good 50 - Good 80 - Moderate
PM25 44 - Good 44 - Good 53 - Moderate

Alexandria

 Monday Tuesday Wednesday
Ozone 35 - Good 37 - Good 49 - Good
PM25 39 - Good 33 - Good 33 - Good

Lake Charles

 Monday Tuesday Wednesday
Ozone 37 - Good 35 - Good 40 - Good
PM25 33 - Good 28 - Good 28 - Good

Lafayette

 Monday Tuesday Wednesday
Ozone 40 - Good 44 - Good 49 - Good
PM25 44 - Good 39 - Good 33 - Good

Monroe

 Monday Tuesday Wednesday
Ozone 39 - Good 42 - Good 47 - Good
PM25 39 - Good 39 - Good 33 - Good

New Orleans

 Monday Tuesday Wednesday
Ozone 42 - Good 44 - Good 67 - Moderate
PM25 50 - Good 39 - Good 44 - Good

Shreveport

 Monday Tuesday Wednesday
Ozone 41 - Good 44 - Good 49 - Good
PM25 33 - Good 33 - Good 28 - Good

Thibodaux

 Monday Tuesday Wednesday
Ozone 34 - Good 32 - Good 43 - Good
PM25 60 - Moderate 56 - Moderate 56 - 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.