Air Monitoring Data & AQI

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

Issued: Wednesday, March 3, 2021, 2:30 PM

Wednesday, light winds will limit pollutant dispersion as a surface high pressure system settles over the Bayou State. Although low carryover will keep AQI levels Good in most locations, seasonal burning could result in low-Moderate AQI levels across southern portions of the state. Thursday, the surface high pressure will continue to limit dispersion and mixing as it moves slowly east. As a result, AQI levels will be high-Good to low-Moderate. Friday, a weak low pressure system will bring increased mixing and dispersion. However, carryover from the previous day and continued light winds will keep AQI levels high-Good to low-Moderate.

Baton Rouge

Wednesday Thursday Friday
Ozone 44 - Good 49 - Good 43 - Good
PM25 33 - Good 53 - Moderate 50 - Good


Wednesday Thursday Friday
Ozone 40 - Good 44 - Good 37 - Good
PM25 29 - Good 46 - Good 42 - Good

Lake Charles

Wednesday Thursday Friday
Ozone 43 - Good 46 - Good 41 - Good
PM25 38 - Good 55 - Moderate 50 - Good


Wednesday Thursday Friday
Ozone 44 - Good 46 - Good 41 - Good
PM25 53 - Moderate 59 - Moderate 55 - Moderate


Wednesday Thursday Friday
Ozone 40 - Good 44 - Good 37 - Good
PM25 33 - Good 42 - Good 38 - Good

New Orleans

Wednesday Thursday Friday
Ozone 41 - Good 46 - Good 42 - Good
PM25 53 - Moderate 53 - Moderate 50 - Good


Wednesday Thursday Friday
Ozone 36 - Good 41 - Good 39 - Good
PM25 33 - Good 50 - Good 46 - Good


Wednesday Thursday Friday
Ozone 42 - Good 44 - Good 40 - Good
PM25 33 - Good 53 - Moderate 50 - 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.