Air Monitoring Data & AQI

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

Issued: Wednesday, June 16, 2021, 2:30 PM

Wednesday, an Air Quality Advisory is in effect for Baton Rouge and New Orleans. Temperatures in the mid-90s and mostly sunny skies will increase ozone formation, and light northeasterly winds will limit dispersion across much of the Bayou State. In addition, areas of smoke will continue to impact far southern and western Louisiana, enhancing ozone production and increasing particle levels. As a result, AQI levels will be Moderate in most locations, with Unhealthy for Sensitive Groups AQI levels expected in New Orleans and Baton Rouge. Thursday, despite easterly winds enhancing low-level mixing, mostly sunny skies and temperatures near 90F will once again support ozone formation, producing mid- to high-Moderate AQI levels. Friday, sunny skies and warm temperatures will continue to promote ozone development for the northwest half of Louisiana. In southeastern Louisiana, clouds will limit ozone formation. However, an area of Saharan dust could increase particle levels. As a result, AQI levels will be Moderate for most locations on Friday.

Baton Rouge

Wednesday Thursday Friday
Ozone 101 - Unhealthy for sensitive groups 90 - Moderate 47 - Good
PM25 46 - Good 42 - Good 53 - Moderate


Wednesday Thursday Friday
Ozone 49 - Good 46 - Good 47 - Good
PM25 50 - Good 33 - Good 46 - Good

Lake Charles

Wednesday Thursday Friday
Ozone 61 - Moderate 54 - Moderate 61 - Moderate
PM25 53 - Moderate 46 - Good 53 - Moderate


Wednesday Thursday Friday
Ozone 64 - Moderate 51 - Moderate 49 - Good
PM25 29 - Good 33 - Good 53 - Moderate


Wednesday Thursday Friday
Ozone 51 - Moderate 61 - Moderate 51 - Moderate
PM25 42 - Good 33 - Good 38 - Good

New Orleans

Wednesday Thursday Friday
Ozone 101 - Unhealthy for sensitive groups 67 - Moderate 46 - Good
PM25 42 - Good 38 - Good 53 - Moderate


Wednesday Thursday Friday
Ozone 46 - Good 71 - Moderate 61 - Moderate
PM25 55 - Moderate 50 - Good 42 - Good


Wednesday Thursday Friday
Ozone 58 - Moderate 51 - Moderate 44 - Good
PM25 57 - Moderate 46 - 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.