Air Monitoring Data & AQI

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

Issued: Thursday, June 13, 2024, 2:30 PM

Thursday and Friday, an upper-level ridge of high pressure will limit atmospheric mixing throughout the period. In addition, mostly skies and highs in the mid-90s will enhance ozone formation. Furthermore, light and variable winds will reduce dispersion, allowing pollutants to accumulate across Louisiana. These conditions will result in mid-to high-Moderate AQI levels for much of the state on both days, with Unhealthy for Sensitive Groups AQI levels expected in Baton Rouge and New Orleans. Saturday, the upper-level ridge will begin to slowly shift eastward, increasing atmospheric mixing slightly. In addition, light southerly to southeasterly winds will gradually disperse pollutants. However, mostly sunny skies and temperatures in the mid-90s will continue to enhance ozone formation, and pollutant carryover from previous days will be high. Therefore, AQI levels will be mid- to high-Moderate statewide.

Baton Rouge

Thursday Friday Saturday
Ozone 112 - Unhealthy for sensitive groups 105 - Unhealthy for sensitive groups 100 - Moderate
PM25 60 - Moderate 62 - Moderate 58 - Moderate


Thursday Friday Saturday
Ozone 67 - Moderate 67 - Moderate 61 - Moderate
PM25 55 - Moderate 56 - Moderate 53 - Moderate

Lake Charles

Thursday Friday Saturday
Ozone 100 - Moderate 93 - Moderate 80 - Moderate
PM25 55 - Moderate 56 - Moderate 55 - Moderate


Thursday Friday Saturday
Ozone 77 - Moderate 71 - Moderate 67 - Moderate
PM25 58 - Moderate 56 - Moderate 55 - Moderate


Thursday Friday Saturday
Ozone 67 - Moderate 67 - Moderate 64 - Moderate
PM25 53 - Moderate 55 - Moderate 53 - Moderate

New Orleans

Thursday Friday Saturday
Ozone 101 - Unhealthy for sensitive groups 101 - Unhealthy for sensitive groups 97 - Moderate
PM25 58 - Moderate 56 - Moderate 55 - Moderate


Thursday Friday Saturday
Ozone 84 - Moderate 84 - Moderate 80 - Moderate
PM25 56 - Moderate 56 - Moderate 55 - Moderate


Thursday Friday Saturday
Ozone 67 - Moderate 67 - Moderate 61 - Moderate
PM25 60 - Moderate 60 - Moderate 56 - 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.