Enclosure
1­
1
Enclosure
1
State
of
California
Initial
Recommendations
for
Area
Designations
under
the
Federal
PM2.5
Standard
(
based
on
2000­
2002
monitoring
data)

Recommended
PM2.5
Nonattainment
Areas
in
California
Nonattainment
Area
24­
Hour
Design
Value*
High
Monitor
ID
and
Location
Annual
Average
Design
Value*
High
Monitor
ID
and
Location
Areas
Included
1.
South
Coast
Air
Basin
73
ID#
60658001
Rubidioux
28.9
ID#
60658001
Rubidioux
Western
Los
Angeles
(
including
Catalina
and
San
Clemente
Islands),
Orange,

Southwestern
San
Bernardino,
and
Western
Riverside
Counties
2.
San
Joaquin
Valley
Air
Basin
90
ID#
61072002
Visalia
23.2
ID#
61072002
Visalia
San
Joaquin,
Stanislaus,
Merced,

Madera,
Fresno,
Kings,
Tulare,
and
Western
Kern
Counties
3.
San
Diego
County**
43
ID#
60730001
Chula
Vista
16.4
ID#
60731002
Escondido
San
Diego
County
4.
Calexico**
50
ID#
60250005
Calexico
15.6
ID#
60250005
Calexico
City
of
Calexico
*
The
federal
24­
hour
standard
is
65
ug/
m3.
The
federal
annual
average
standard
is
15.0
ug/
m3.

**
Recommended
nonattainment
for
the
annual
average
standard
only.
Enclosure
1­
2
Recommended
PM2.5
Attainment
Areas
in
California
Attainment
Area
24­
Hour
Design
Value
High
Monitor
ID
and
Location
Annual
Average
Design
Value
High
Monitor
ID
and
Location
Areas
Included
North
Coast
Air
Basin
28
ID#
60450006
Ukiah
8.8
ID#
60231002
Eureka
Del
Norte,
Humbolt,
Trinity,
Mendocino,

and
Northern
Sonoma
Counties
Shasta
County
34
ID#
60890004
Redding
9.7
ID#
60890004
Redding
Shasta
County
Butte
County
60
ID#
60070002
Chico
14.6
ID#
60070002
Chico
Butte
County
Colusa
County
37
ID#
60111002
Colusa
10.4
ID#
60111002
Colusa
Colusa
County
Calaveras
County
26
ID#
60090001
San
Andreas
9.0
ID#
60090001
San
Andreas
Calaveras
County
North
Central
Coast
Air
Basin
22
ID#
60531003
Salinas
8.6
ID#
60531003
Salinas
Monterey,
San
Benito,
and
Santa
Cruz
Counties
San
Luis
Obispo
County
39
ID#
60798001
Atascadero
10.0
ID#
60792002
San
Luis
Obispo
San
Luis
Obispo
County
Coachella
Valley
26
ID#
60652002
Indio
11.8
ID#
60652002
Indio
Portion
of
Riverside
County
Enclosure
1­
3
Recommended
PM2.5
Unclassifiable
Areas
in
California
Northeast
Plateau
Air
Basin
(
includes
Siskiyou,
Modoc,
and
Lassen
Counties)

Tehama
County
Sierra
County
Plumas
County
Glenn
County
Lake
County
Sutter
County
Yuba
County
Nevada
County
Placer
County
El
Dorado
County
Sacramento
County
Yolo
County
San
Francisco
Bay
Area
(
includes
Marin,
Southern
Sonoma,
Napa,
Western
Solano,
Contra
Costa,
Alameda,
Santa
Clara,

San
Francisco,
and
San
Mateo
Counties)

Amador
County
Tuolume
County
Mariposa
County
Santa
Barbara
County
Great
Basin
Valleys
Air
Basin
(
includes
Alpine,
Mono,
and
Inyo
Counties)

Ventura
County
Mojave
Desert
Air
Basin
(
includes
Eastern
Kern
County,
Antelope
Valley
and
Riverside
County,
excluding
recommended
Coachella
Valley
attainment
area)

Imperial
County
(
excluding
the
recommended
Calexico
nonattainment
area)
