Air Monitoring Data & AQI

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

Issued: Thursday, September 28, 2023, 2:30 PM

Thursday, light easterly winds will hinder dispersion across Louisiana. In addition, thin density smoke will keep particle levels elevated, particularly over northwestern parts of the state. Furthermore, partly sunny skies and highs in the low-90s will support ozone formation, leading to high-Good to low-Moderate AQI levels. Friday and Saturday, a weak area of low pressure aloft may bring an increase in showers and thunderstorms over far southern parts of the state, aiding dispersion. In addition, light to moderate easterly winds will strengthen slightly, promoting low-level mixing. However, with partly sunny skies and above-normal temperatures continuing to aid ozone formation, AQI levels will remain high-Good to low-Moderate in most locations on both days.

Baton Rouge

Thursday Friday Saturday
Ozone 47 - Good 51 - Moderate 54 - Moderate
PM25 46 - Good 38 - Good 42 - Good


Thursday Friday Saturday
Ozone 46 - Good 44 - Good 45 - Good
PM25 46 - Good 33 - Good 38 - Good

Lake Charles

Thursday Friday Saturday
Ozone 54 - Moderate 51 - Moderate 54 - Moderate
PM25 46 - Good 38 - Good 38 - Good


Thursday Friday Saturday
Ozone 49 - Good 46 - Good 48 - Good
PM25 33 - Good 29 - Good 33 - Good


Thursday Friday Saturday
Ozone 46 - Good 49 - Good 50 - Good
PM25 42 - Good 33 - Good 38 - Good

New Orleans

Thursday Friday Saturday
Ozone 42 - Good 47 - Good 50 - Good
PM25 38 - Good 33 - Good 38 - Good


Thursday Friday Saturday
Ozone 51 - Moderate 48 - Good 49 - Good
PM25 59 - Moderate 50 - Good 53 - Moderate


Thursday Friday Saturday
Ozone 42 - Good 40 - Good 47 - Good
PM25 38 - Good 29 - 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.