Air Quality Forecast

The air quality forecast for Friday, February 26 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Saturday, February 27 is for less favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Sunday, February 28 is for more favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Monday, March 1 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The Forecast for Sunday and Monday was issued on Friday and subject to be slightly different due to unexpected changes in meteorological conditions. Please refer to the "Current Ozone & PM2.5 Pollution Map" for up to date information.

Air quality reports use the Air Quality Index, which represents the higher of two pollutants - PM2.5 or ozone. For ground-level ozone (O3), these values are based upon an 8-hour running average. For ground-level particulate matter with a diameter less than 2.5 microns (PM2.5), these values are based upon a 24-hour daily average.

Air Quality Index (AQI) Values	Levels of Health Concern	Colors
When the AQI is in this range:	…air quality conditions are:	…as symbolized by this color:
0 a 50	Good	Green
51 a 100	Moderate	Yellow
101 a 150	Unhealthy for Sensitive Groups (U.S.G.)	Orange
151 a 200	Unhealthy	Red
201 a 300	Very Unhealthy	Purple
301 a 500	Hazardous	Maroon

City	Forecast Maximum AQI and Pollutant
	FEBRUARY 26		FEBRUARY 27		FEBRUARY 28		MARCH 1
Alpine	51	OZONE	58	OZONE	46	OZONE	51	OZONE
Chula Vista	43	OZONE	46	OZONE	44	OZONE	45	OZONE
Del Mar	41	OZONE	40	OZONE	43	OZONE	42	OZONE
Downtown	46	PM2.5	53	PM2.5	44	OZONE	45	OZONE
El Cajon	46	OZONE	55	PM2.5	45	OZONE	49	OZONE
Escondido	46	OZONE	57	PM2.5	45	OZONE	49	OZONE
Otay Mesa	55	PM2.5	78	PM2.5	57	PM2.5	59	PM2.5
Kearny Mesa	44	OZONE	46	OZONE	44	OZONE	48	OZONE
Oceanside	41	OZONE	40	OZONE	43	OZONE	42	OZONE

POLLUTANT SPECIFIC FORECASTS

City	Forecast Maximum AQI OZONE		Forecast Maximum AQI PM2.5
	FRIDAY, FEBRUARY 26		FRIDAY, FEBRUARY 26
Alpine	51	MODERATE	13	GOOD
Chula Vista	43	GOOD	42	GOOD
Del Mar	41	GOOD	38	GOOD
Downtown	42	GOOD	46	GOOD
El Cajon	46	GOOD	42	GOOD
Escondido	46	GOOD	42	GOOD
Otay Mesa	44	GOOD	55	MODERATE
Kearny Mesa	44	GOOD	42	GOOD
Oceanside	41	GOOD	38	GOOD

City	Forecast Maximum AQI OZONE		Forecast Maximum AQI PM2.5
	SATURDAY, FEBRUARY 27		SATURDAY, FEBRUARY 27
Alpine	58	MODERATE	21	GOOD
Chula Vista	46	GOOD	46	GOOD
Del Mar	40	GOOD	38	GOOD
Downtown	42	GOOD	53	MODERATE
El Cajon	51	MODERATE	55	MODERATE
Escondido	51	MODERATE	57	MODERATE
Otay Mesa	44	GOOD	78	MODERATE
Kearny Mesa	46	GOOD	46	GOOD
Oceanside	40	GOOD	38	GOOD

City	Forecast Maximum AQI OZONE		Forecast Maximum AQI PM2.5
	SUNDAY, FEBRUARY 28		SUNDAY, FEBRUARY 28
Alpine	46	GOOD	13	GOOD
Chula Vista	44	GOOD	29	GOOD
Del Mar	43	GOOD	29	GOOD
Downtown	44	GOOD	33	GOOD
El Cajon	45	GOOD	38	GOOD
Escondido	45	GOOD	42	GOOD
Otay Mesa	44	GOOD	57	MODERATE
Kearny Mesa	44	GOOD	29	GOOD
Oceanside	43	GOOD	29	GOOD

City	Forecast Maximum AQI OZONE		Forecast Maximum AQI PM2.5
	MONDAY, MARCH 1		MONDAY, MARCH 1
Alpine	51	MODERATE	25	GOOD
Chula Vista	45	GOOD	38	GOOD
Del Mar	42	GOOD	33	GOOD
Downtown	45	GOOD	42	GOOD
El Cajon	49	GOOD	42	GOOD
Escondido	49	GOOD	46	GOOD
Otay Mesa	44	GOOD	59	MODERATE
Kearny Mesa	48	GOOD	38	GOOD
Oceanside	42	GOOD	33	GOOD

In cases where this page is not updated properly, or to hear the air pollution forecast, please call our air pollution recording line at (858) 586-2800.

If you need air quality information, please call (858) 586-2600. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.

Air Quality Forecast

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