Air Monitoring Data & AQI

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

Issued: Tuesday, November 30, 2021, 2:30 PM

Tuesday, light and variable winds will limit dispersion as a surface high pressure system lingers along the Gulf Coast. In addition, smoke from agricultural burning will contribute to elevated particle levels. Therefore, AQI levels will be Moderate statewide. Wednesday, conditions will improve slightly as a trough of low pressure aloft increases atmospheric mixing. However, patchy morning fog will promote particle formation, and light winds will continue to hinder dispersion. These conditions will result in high-Good to low-Moderate AQI levels. Thursday, a ridge of high pressure aloft will limit atmospheric mixing. In addition, light and variable winds throughout the day will limit dispersion as the surface high pressure system strengthens across the Bayou State. As a result, AQI levels will once again be Moderate statewide.

Baton Rouge

Tuesday Wednesday Thursday
Ozone 44 - Good 42 - Good 36 - Good
PM25 63 - Moderate 59 - Moderate 66 - Moderate


Tuesday Wednesday Thursday
Ozone 37 - Good 36 - Good 34 - Good
PM25 53 - Moderate 46 - Good 53 - Moderate

Lake Charles

Tuesday Wednesday Thursday
Ozone 43 - Good 41 - Good 38 - Good
PM25 53 - Moderate 50 - Good 53 - Moderate


Tuesday Wednesday Thursday
Ozone 41 - Good 40 - Good 38 - Good
PM25 57 - Moderate 53 - Moderate 55 - Moderate


Tuesday Wednesday Thursday
Ozone 39 - Good 37 - Good 35 - Good
PM25 53 - Moderate 46 - Good 53 - Moderate

New Orleans

Tuesday Wednesday Thursday
Ozone 40 - Good 38 - Good 36 - Good
PM25 57 - Moderate 55 - Moderate 59 - Moderate


Tuesday Wednesday Thursday
Ozone 37 - Good 36 - Good 34 - Good
PM25 55 - Moderate 53 - Moderate 55 - Moderate


Tuesday Wednesday Thursday
Ozone 35 - Good 33 - Good 32 - Good
PM25 53 - Moderate 50 - Good 53 - 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.