Notes:U/A = Unclassified/Attainment;N = Non-Attainment;N* = Non-attainment in a portion of the
county; NC = Not Classified
COUNTY
DISTRICT
1-HR OZONE DESIG-
NATION
CLASSIF ICATION
MAJOR SOURCE
NOX/VOC THRESHOLD (tons/yr)
50% OF THRES- HOLD
(tons/yr)
PM10 DESIG- NATION
CLASSIF ICATION
MAJOR SOURCE PM10
THRESHOLD (tons/yr)
50% OF THRES- HOLD
(tons/yr)
Alameda
Bay Area AQMD
N
NC
100
50
U/A
100
50
Alpine
Great Basin APCD
U/A
100
50
U/A
100
50
Amador
Amador APCD
U/A
100
50
U/A
100
50
Butte
Butte AQMD
N
Transition
100
50
U/A
100
50
Calaveras
Calaveras AQMD
U/A
100
50
U/A
100
50
Colusa
Colusa APCD
U/A
100
50
U/A
100
50
Contra Costa
Bay Area AQMD
N
NC
100
50
U/A
100
50
Del Norte
North Coast AQMD
U/A
100
50
U/A
100
50
El Dorado
El Dorado AQMD
N
Severe
25
12.5
U/A
100
50
Fresno
SJV Unified APCD
N
Severe
25
12.5
N
Serious
70
35
Glenn
Glenn APCD
U/A
100
50
U/A
100
50
Humboldt
North Coast AQMD
U/A
100
50
U/A
100
50
Imperial
Imperial APCD
N
Transition
100
50
N*
Moderate
100
50
Inyo
Great Basin APCD
U/A
100
50
N*
Serious
70
35
Kern
SJV Unified APCD
N
Severe
25
12.5
N
Serious
70
35
Kern
Kern APCD
N
Serious
50
25
U/A
100
50
Kings
SJV Unified APCD
N
Severe
25
12.5
N
Serious
70
35
Lake
Lake AQMD
U/A
100
50
U/A
100
50
Lassen
Lassen APCD
U/A
100
50
U/A
100
50
Los Angeles
South Coast AQMD
N
Extreme
10
5
N
Serious
70
35
Los Angeles
Antelope Valley APCD
N
Severe
25
12.5
U/A
100
50
Madera
SJV Unified APCD
N
Severe
25
12.5
N
Serious
70
35
Marin
Bay Area AQMD
N
NC
100
50
U/A
100
50
Mariposa
Mariposa APCD
U/A
100
50
U/A
100
50
Mendocino
Mendocino AQMD
U/A
100
50
U/A
100
50
Merced
SJV Unified APCD
N
Severe
25
12.5
N
Serious
70
35
Modoc
Modoc APCD
U/A
100
50
U/A
100
50
Mono
Great Basin APCD
U/A
100
50
N*
Moderate
100
50
Monterey
Monterey Bay APCD
U/A
100
50
U/A
100
50
Napa
Bay Area AQMD
N
NC
100
50
U/A
100
50
COUNTY
DISTRICT
1-HR OZONE DESIG-
NATION
CLASSIF ICATION
MAJOR SOURCE
NOX/VOC THRESHOLD (tons/yr)
50% OF THRES-HOLD
(tons/yr)
PM10 DESIG- NATION
CLASSIF ICATION
MAJOR SOURCE PM10
THRESHOLD (tons/yr)
50% OF THRES- HOLD
(tons/yr)
Nevada
Northern Sierra AQMD
U/A
100
50
U/A
100
50
Orange
South Coast AQMD
N
Extreme
10
5
N
Serious
70
35
Placer
Placer APCD
N
Severe
25
12.5
U/A
100
50
Plumas
Northern Sierra AQMD
U/A
100
50
U/A
100
50
Riverside
South Coast AQMD
N
Extreme
10
5
N
Serious
70
35
Riverside
Mojave Desert AQMD
N*
Severe
25
12.5
N*
Serious
70
35
Sacramento
Sac. Metro AQMD
N
Severe
25
12.5
N
Moderate
100
50
San Benito
Monterey Bay APCD
U/A
100
50
U/A
100
50
San Bernardino
South Coast AQMD
N
Extreme
10
5
N
Serious
70
35
San Bernardino
Mojave Desert AQMD
N*
Severe
25
12.5
N*
Moderate
100
50
San Diego
San Diego APCD
U/A
100
50
U/A
100
50
San Francisco
Bay Area AQMD
N
NC
100
50
U/A
100
50
San Joaquin
SJV Unified APCD
N
Severe
25
12.5
N
Serious
70
35
San Luis Obispo
San Luis Obispo APCD
U/A
100
50
U/A
100
50
San Mateo
Bay Area AQMD
N
NC
100
50
U/A
100
50
Santa Barbara
Santa Barbara APCD
U/A
100
50
U/A
100
50
Santa Clara
Bay Area AQMD
N
NC
100
50
U/A
100
50
Santa Cruz
Monterey Bay APCD
U/A
100
50
U/A
100
50
Shasta
Shasta AQMD
U/A
100
50
U/A
100
50
Sierra
Northern Sierra AQMD
U/A
100
50
U/A
100
50
Siskiyou
Siskiyou APCD
U/A
100
50
U/A
100
50
Solano
Bay Area AQMD
N
NC
100
50
U/A
100
50
Solano
Yolo-Solano AQMD
N
Severe
25
12.5
U/A
100
50
Sonoma
Bay Area AQMD
N
NC
100
50
U/A
100
50
Sonoma
Northern Sonoma APCD
U/A
100
50
U/A
100
50
Stanislaus
SJV Unified APCD
N
Severe
100
50
N
Serious
70
35
Sutter (South)
Feather River AQMD
N*
Severe
25
12.5
U/A
100
50
Sutter (North)
Feather River AQMD
N
Transition
100
50
U/A
100
50
Tehama
Tehama APCD
U/A
100
50
U/A
100
50
Trinity
North Coast AQMD
U/A
100
50
U/A
100
50
Tulare
SJV Unified APCD
N
Severe
25
12.5
N
Serious
70
35
Tuolumne
Tuolumne APCD
U/A
100
50
U/A
100
50
Ventura
Ventura APCD
N
Severe
25
12.5
U/A
100
50
Yolo
Yolo-Solano AQMD
N
Severe
25
12.5
U/A
100
50
Yuba
Feather River AQMD
N
Transition
100
50
U/A
100
50
Notes:U/A =
Unclassified/Attainment;N =
Non-Attainment;N* = Non-attainment in
a portion of the county; NC = Not Classified
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