Air Monitoring Data & AQI

« Back to DEQ's Main Website

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

Issued: Wednesday, April 17, 2024, 2:30 PM

Wednesday and Thursday, partly to mostly cloudy skies and scattered showers will reduce ozone formation over much of Louisiana. However, light to moderate southerly to southeasterly winds will bring thin-density smoke into the state from the Gulf, increasing particle levels in western Louisiana, especially. These conditions will lead to high-Good to low-Moderate AQI levels on both days. Friday, as a weak front stalls over Louisiana, cloud cover will continue to limit ozone production over the northern portion of the state. However, light winds will limit dispersion, allowing pollutants to accumulate in Louisiana. These conditions will keep AQI levels high-Good to low-Moderate in most cities.

Baton Rouge

Wednesday Thursday Friday
Ozone 41 - Good 42 - Good 50 - Good
PM2.5 53 - Moderate 50 - Good 50 - Good


Wednesday Thursday Friday
Ozone 37 - Good 35 - Good 40 - Good
PM2.5 50 - Good 46 - Good 46 - Good

Lake Charles

Wednesday Thursday Friday
Ozone 37 - Good 42 - Good 42 - Good
PM2.5 50 - Good 53 - Moderate 53 - Moderate


Wednesday Thursday Friday
Ozone 39 - Good 37 - Good 43 - Good
PM2.5 42 - Good 50 - Good 46 - Good


Wednesday Thursday Friday
Ozone 35 - Good 34 - Good 39 - Good
PM2.5 42 - Good 46 - Good 42 - Good

New Orleans

Wednesday Thursday Friday
Ozone 42 - Good 42 - Good 45 - Good
PM2.5 42 - Good 46 - Good 46 - Good


Wednesday Thursday Friday
Ozone 36 - Good 35 - Good 41 - Good
PM2.5 55 - Moderate 55 - Moderate 53 - Moderate


Wednesday Thursday Friday
Ozone 38 - Good 38 - Good 40 - Good
PM2.5 46 - Good 50 - Good 46 - 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.