Air Monitoring Data & AQI

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

Issued: Monday, January 25, 2021, 2:30 PM

Monday, gusty southerly winds will keep pollutants well dispersed across southern portions of the Bayou State, while northern portions experience a clean air mass arriving behind a cold front. Therefore AQI levels will be Good statewide. Tuesday, a front will stall across southern portions of Louisiana, producing light winds. In addition, high relative humidity will enhance particle formation across southern Louisiana, leading to low-Moderate AQI levels. Farther north, light northeasterly winds will continue to transport clean air into the region, resulting in another day of Good AQI levels. Wednesday, a cold front will move through the entire state by midday. Behind the front, northerly winds will enhance pollutant dispersion, and keep AQI levels Good statewide.

Baton Rouge

Monday Tuesday Wednesday
Ozone 31 - Good 33 - Good 36 - Good
PM25 42 - Good 53 - Moderate 42 - Good


Monday Tuesday Wednesday
Ozone 28 - Good 35 - Good 32 - Good
PM25 33 - Good 42 - Good 33 - Good

Lake Charles

Monday Tuesday Wednesday
Ozone 35 - Good 35 - Good 37 - Good
PM25 50 - Good 53 - Moderate 42 - Good


Monday Tuesday Wednesday
Ozone 30 - Good 33 - Good 35 - Good
PM25 46 - Good 53 - Moderate 42 - Good


Monday Tuesday Wednesday
Ozone 30 - Good 35 - Good 32 - Good
PM25 33 - Good 42 - Good 33 - Good

New Orleans

Monday Tuesday Wednesday
Ozone 31 - Good 34 - Good 35 - Good
PM25 38 - Good 55 - Moderate 42 - Good


Monday Tuesday Wednesday
Ozone 33 - Good 36 - Good 31 - Good
PM25 33 - Good 50 - Good 33 - Good


Monday Tuesday Wednesday
Ozone 34 - Good 36 - Good 36 - Good
PM25 42 - Good 53 - Moderate 42 - 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.