Air Monitoring Data & AQI

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

Issued: Sunday, May 26, 2024, 2:32 PM

Sunday, southerly to south-southwesterly winds will transport a humid, unstable air mass into Louisiana, increasing mixing in the lower levels of the atmosphere and limiting ozone formation. However, these winds will also transport thin-density smoke into the state from the western and central Gulf of Mexico, keeping particle concentrations elevated. Therefore, AQI levels will be mid-Moderate in Shreveport, with low-Moderate AQI levels elsewhere. Memorial Day, as a weak cold front enters the state, light and variable winds will limit dispersion of smoke. Furthermore, mostly sunny skies will promote ozone development, and lingering smoke will enhance ozone formation. These conditions, combined with carryover from the previous days, will yield low- to mid-Moderate AQI levels in most cities. Tuesday, a slightly drier air mass will limit vertical mixing. In addition, light and variable winds across southeastern Louisiana will allow pollutants to accumulate. Furthermore, partly sunny skies and warm temperatures will promote ozone development. As a result, AQI levels will be high-Moderate in Baton Rouge, New Orleans, and Thibodaux, with low- to mid-Moderate AQI levels in most locations.

Baton Rouge

Sunday Monday Tuesday
Ozone 44 - Good 84 - Moderate 100 - Moderate
PM25 56 - Moderate 62 - Moderate 64 - Moderate


Sunday Monday Tuesday
Ozone 39 - Good 51 - Moderate 58 - Moderate
PM25 62 - Moderate 60 - Moderate 56 - Moderate

Lake Charles

Sunday Monday Tuesday
Ozone 41 - Good 71 - Moderate 77 - Moderate
PM25 60 - Moderate 66 - Moderate 58 - Moderate


Sunday Monday Tuesday
Ozone 40 - Good 67 - Moderate 74 - Moderate
PM25 53 - Moderate 64 - Moderate 62 - Moderate


Sunday Monday Tuesday
Ozone 36 - Good 46 - Good 48 - Good
PM25 53 - Moderate 50 - Good 44 - Good

New Orleans

Sunday Monday Tuesday
Ozone 44 - Good 80 - Moderate 97 - Moderate
PM25 55 - Moderate 60 - Moderate 62 - Moderate


Sunday Monday Tuesday
Ozone 44 - Good 54 - Moderate 61 - Moderate
PM25 75 - Moderate 62 - Moderate 56 - Moderate


Sunday Monday Tuesday
Ozone 42 - Good 74 - Moderate 90 - Moderate
PM25 55 - Moderate 60 - Moderate 62 - 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.