Site Name Ozone AQI PM2.5 AQI PM10 AQI
Carmel Valley AMS 20 at 1AM 63 at 1AM N/A
Hollister AMS 32 at 1AM 99 at 1AM 50 at 1AM
King City AMS 20 at 1AM 84 at 1AM 54 at 1AM
Pinnacles NM 23 at 1AM N/A N/A
SLV Middle School AMS N/A 115 at 1AM N/A
Salinas AMS 14 at 1AM 120 at 1AM N/A
San Juan Bautista AMS N/A N/A 49 at 1AM
Santa Cruz AMS 34 at 1AM 152 at 1AM N/A
All times shown in PDT Air Quality Index Information

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Air Quality Index Information

The above map reflects the most recent Air Quality Index (AQI) for today at each of the air monitoring stations. Station data is refreshed at the top of every hour, but may not be shown immediately due to data transfer and verification limitations. The AQI represents a weighted rolling average concentration over 24 hours for PM10 and PM2.5; and 8 hours for Ozone.

Site:  Parameter:  Hours:
Air Quality Index Information
Area Today Tomorrow
Pinnacles National Monument N/A N/A
Salinas N/A N/A
Santa Cruz N/A N/A
Hollister N/A N/A
King City N/A N/A
Carmel Valley N/A N/A
Davenport N/A N/A
San Lorenzo Valley N/A N/A
Scotts Valley N/A N/A
Watsonville N/A N/A
Marina/Seaside N/A N/A
Monterey Peninsula N/A N/A
September 20 September 23 As the low pressure system over the region moves towards the Great Basin, a separate low pressure system from the north will gradually make its way south influencing prevailing winds to the region. This system will effectively channel winds from the Pacific Northwest bringing smokey conditions for the next two days. AQIs have been and are expected to remain in the UNHEALTHY FOR SENSITIVE GROUPS to UNHEALTY categories as this wind pattern sustains itself until Friday. See Wildfire Smoke Information and Resources - Monterey Bay Air Resources District (specialdistrict.org) for current AQI measurements and guidelines. Additionally, as high pressure has given way to the current low pressure regime, increased mixing has allowed high altitude smoke to mix down to the surface. As the inversion reestablishes itself over the region today, this will trap smoke already at the surface. As this low pressure system migrates eastward in the coming days, prevailing winds should shift westerly, Thursday night and into Friday. Increased onshore flow should abate the smokey conditions and bring a noticeable improvement to air quality in the region. Expect seasonal temperatures, with coastal temps ranging from the mid 50s to the upper 60s, and inland temps ranging from the low 50s to the low 80s. Seasonal temperatures suggest GOOD air quality for Ozone. Although there will be breezy conditions in the Salinas Valley, we do not expect dust impacts and thus air quality for PM10 will remain GOOD.

Source: PFIRS - Prescribed Fire Information Reporting System