Current Readings at Air Monitoring Subregions

Localized air quality events, such as wildfires that create smoke,
may not be reflected in the data presented.

LOS ANGELES COUNTY

Area#	Source/Receptor Area
1.	Central L.A.
2.	Northwest Coastal L.A. County
3.	Southwest Coastal L.A. County
4.	South Coastal L.A. County
5.	Southeast Los Angeles County
6.	West San Fernando Valley
7.	East San Fernando Valley
8.	West San Gabriel Valley
9.	East San Gabriel Valley 1
9.	East San Gabriel Valley 2
10.	Pomona/Walnut Valley 1
11.	South San Gabriel Valley
12.	South Central L.A. County
13.	Santa Clarita Valley
14.	Antelope Valley
15.	San Gabriel Mountains

---

ORANGE COUNTY

Area#	Source/Receptor Area
16.	North Orange County
17.	Central Orange County
18.	North Coastal Orange County
19.	Saddleback Valley
20.	Central Coastal Orange County
21.	Capistrano Valley

---

RIVERSIDE COUNTY

Area#	Source/Receptor Area
22.	Norco/Corona
23.	Metropolitan Riverside Area 1
23.	Metropolitan Riverside Area 2
24.	Perris Valley
25.	Lake Elsinore Area
26.	Temecula Valley
27.	Anza
28.	Hemet/San Jacinto Valley
29.	San Gorgonio Pass
30.	Coachella Valley 1
30.	Coachella Valley 2
31.	East Riverside County

---

SAN BERNARDINO COUNTY

Area#	Source/Receptor Area
32.	Northwest San Bernardino Valley
33.	Southwest San Bernardino Valley
34.	Central San Bernardino Valley 1
34.	Central San Bernardino Valley 2
35.	East San Bernardino Valley
36.	East San Bernardino Mountains
37.	Central San Bernardino Mountains
38.	West San Bernardino Mountains