Air Monitoring Data & AQI

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

Issued: Saturday, June 28, 2025, 2:32 PM

Saturday, partly to mostly sunny skies and high temperatures in the low- to mid-90s will continue to support ozone production over the Bayou State. Furthermore, light southerly winds will limit dispersion and gradually transport a plume of Saharan dust into the southern part of the state, increasing particle concentrations late in the day. As a result, AQI levels will be low-Moderate in most cities, with mid-Moderate AQI levels for ozone in Baton Rouge. Sunday and Monday, light southerly to southwesterly winds will carry Saharan dust northward across the state, further increasing particle levels throughout Louisiana. In addition, partly to mostly sunny skies and very warm temperatures will continue to aid ozone formation in some areas. These conditions will lead to low- to mid-Moderate AQI levels statewide on both days.

Baton Rouge

 Saturday Sunday Monday
Ozone 84 - Moderate 67 - Moderate 61 - Moderate
PM25 55 - Moderate 71 - Moderate 77 - Moderate

Alexandria

 Saturday Sunday Monday
Ozone 54 - Moderate 51 - Moderate 45 - Good
PM25 50 - Good 58 - Moderate 68 - Moderate

Lake Charles

 Saturday Sunday Monday
Ozone 48 - Good 46 - Good 44 - Good
PM25 53 - Moderate 68 - Moderate 75 - Moderate

Lafayette

 Saturday Sunday Monday
Ozone 43 - Good 42 - Good 40 - Good
PM25 53 - Moderate 66 - Moderate 69 - Moderate

Monroe

 Saturday Sunday Monday
Ozone 49 - Good 51 - Moderate 44 - Good
PM25 44 - Good 53 - Moderate 62 - Moderate

New Orleans

 Saturday Sunday Monday
Ozone 61 - Moderate 51 - Moderate 49 - Good
PM25 50 - Good 68 - Moderate 71 - Moderate

Shreveport

 Saturday Sunday Monday
Ozone 58 - Moderate 64 - Moderate 51 - Moderate
PM25 44 - Good 56 - Moderate 69 - Moderate

Thibodaux

 Saturday Sunday Monday
Ozone 44 - Good 43 - Good 41 - Good
PM25 53 - Moderate 69 - Moderate 73 - 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.