Air Monitoring Data & AQI

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

Issued: Friday, March 31, 2023, 2:30 PM

Friday, as a cold front moves into the Bayou State, increasing clouds and rain showers will reduce ozone formation. In addition, strengthening southerly winds will enhance mixing and dispersion. However, these winds will also transport smoke from the western Gulf into Louisiana, increasing particle levels. Therefore, AQI levels will be high-Good to low-Moderate. Saturday, lighter northwesterly winds behind the departing front will limit pollutant dispersion. Furthermore, increasing sunshine will enhance ozone formation. These conditions will keep AQI levels high-Good to low-Moderate. Sunday, strengthening southeasterly to southerly winds will aid mixing and dispersion over Louisiana. Furthermore, increasing clouds and thunderstorms in the afternoon will limit ozone production. Therefore, AQI levels will be Good throughout the state.

Baton Rouge

Friday Saturday Sunday
Ozone 38 - Good 58 - Moderate 48 - Good
PM25 57 - Moderate 50 - Good 42 - Good


Friday Saturday Sunday
Ozone 34 - Good 46 - Good 37 - Good
PM25 42 - Good 38 - Good 29 - Good

Lake Charles

Friday Saturday Sunday
Ozone 33 - Good 50 - Good 37 - Good
PM25 53 - Moderate 53 - Moderate 50 - Good


Friday Saturday Sunday
Ozone 35 - Good 49 - Good 44 - Good
PM25 42 - Good 42 - Good 33 - Good


Friday Saturday Sunday
Ozone 32 - Good 46 - Good 39 - Good
PM25 42 - Good 33 - Good 29 - Good

New Orleans

Friday Saturday Sunday
Ozone 41 - Good 49 - Good 44 - Good
PM25 46 - Good 42 - Good 38 - Good


Friday Saturday Sunday
Ozone 33 - Good 45 - Good 40 - Good
PM25 46 - Good 38 - Good 33 - Good


Friday Saturday Sunday
Ozone 34 - Good 46 - Good 40 - Good
PM25 53 - Moderate 50 - Good 42 - 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.