Enclosure 2

California NO2 Areas Boundary Descriptions 

Page 1 of 7 

Amador County Air Pollution Control District 

All of Amador County 

Antelope Valley Air Quality Management District 

That portion of Los Angeles County which lies north and east of a line described as 

follows: Beginning at the Los Angeles-San Bernardino County boundary and running 

west along the township line common to T. 3 N and T. 2 N, San Bernardino Base and 

Meridian; then north along the range line common to R. 8 W and R. 9 W; then west along 

the township line common to T. 4 N and T. 3 N; then north along the range line common 

to R. 12 W and R. 13 W to the southeast corner of Section 12, T. 5 N, R. 13 W; then west 

along the south boundaries of Sections 12, 11, 10, 9, 8, 7, T. 5 N, R. 13 W to the 

boundary of the Angeles National Forest which is collinear with the range line common 

to R. 13 W and R. 14 W; then north and west along the Angeles National Forest 

boundary to the point of intersection with the township line common to T. 7 N and T. 6 N 

(point is at the northwest corner of Section 4 in T. 6 N, R. 14 W); then west along the 

township line common to T. 7 N and T. 6 N; then north along the range line common to 

R. 15 W and R. 16 W to the southeast corner of Section 13, T. 7 N, R. 16 W; then along 

the south boundaries of Sections 13, 14, 15, 16, 17, 18, T. 7 N, R. 16 W; then north along 

the range line common to R. 16 W and R. 17 W to the north boundary of the Angeles 

National Forest (collinear with township line common to T. 8 N and T. 7 N) then west 

and north along the Angeles National Forest boundary to the point of intersection with 

the south boundary of the Rancho La Liebre Land Grant; then west and north along this 

land grant boundary to the Los Angeles-Kern County boundary. 

Bay Area Air Quality Management District 

(a) All of Alameda County 

(b) All of Contra Costa County 

(c) All of Marin County 

(d) All of Napa County 

(e) All of San Francisco County 

(f) All of San Mateo County 

(g) All of Santa Clara County 

(h) That portion of Sonoma County which lies south and east of a line described as follows: 

Beginning at the southeasterly corner of the Rancho Estero Americano, being on the 

boundary line between Marin and Sonoma Counties, California; thence running northerly 

along the easterly boundary line of said Rancho Estero Americano to the northeasterly 

corner thereof, being an angle corner in the westerly boundary line of Rancho Canada de 

Jonive; thence running along said boundary of Rancho Canada de Jonive westerly, 

northerly and easterly to its intersection with the easterly line of Graton Road; thence 

running along the easterly and southerly line of Graton Road, northerly and easterly to its 

intersection with the easterly line of Sullivan Road; thence running northerly along said 

easterly line of Sullivan Road to the southerly line of Green Valley Road; thence running 

easterly along the said southerly line of Green Valley Road and easterly along the 

southerly line of State Highway 116, to the westerly line of Vine Hill Road; thence 

running along the westerly and northerly line of Vine Hill Road, northerly and easterly to 
Enclosure 2

California NO2 Areas Boundary Descriptions 

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its intersection with the westerly line of Laguna Road; thence running northerly along the 

westerly line of Laguna Road and the northerly projection thereof to the northerly line of 

Trenton Road; thence running westerly along the northerly line of said Trenton Road to 

the easterly line of Trenton-Healdsburg Road; thence running northerly along said 

easterly line of Trenton-Healdsburg Road to the easterly line of Eastside Road; thence 

running northerly along said easterly line of Eastside Road to its intersection with the 

southerly line of Rancho Sotoyome; thence running easterly along said southerly line of 

Rancho Sotoyome to its intersection with the Township line common to Townships 8 

and 9 North, Mount Diablo Meridian; thence running easterly along said township line to 

its intersection with the boundary line between Sonoma and Napa Counties. 

(i) That portion of Solano County which lies south and west of a line described as follows: 

Beginning at the intersection of the westerly boundary of Solano County and the 

1⁄4 section line running east and west through the center of Section 34, T. 6 N, R. 2.W, 

Mount Diablo Base and Meridian, thence east along said 1⁄4 section line to the east 

boundary of Section 36, T. 6 N, R. 2 W, thence south 1⁄2 mile and east 2.0 miles, more or 

less, along the west and south boundary of Los Putos Rancho to the northwest corner of 

Section 4, T. 5 N, R. 1 W, thence east along a line common to T. 5 N and T. 6 N to the 

northeast corner of Section 3, T. 5 N, R. 1 E, thence south along section lines to the 

southeast corner of Section 10, T. 3 N, R. 1 E, thence east along section lines to the south 

1⁄4 corner of Section 8, T. 3 N, R. 2 E, thence east to the boundary between Solano and 

Sacramento Counties. 

Butte County Air Quality Management District 

All of Butte County 

Calaveras County Air Pollution Control District 

All of Calaveras County 

Colusa County Air Pollution Control District 

All of Colusa County 

Eastern Kern Air Pollution Control District 

That portion of Kern County east and south of a line described as follows: 

Beginning at the Kern-Los Angeles County boundary and running north and east along 

the northwest boundary of the Rancho La Libre Land Grant to the point of intersection 

with the range line common to R. 16 W and R. 17 W, San Bernardino Base and Meridian; 

north along the range line to the point of intersection with the Rancho El Tejon Land 

Grant boundary; then southeast, northeast, and northwest along the boundary of the 

Rancho El Tejon Land Grant to the northwest corner of Section 3, T. 11 N, R. 17 W; then 

west 1.2 miles; then north to the Rancho El Tejon Land Grant boundary; then northwest 

along the Rancho El Tejon line to the southeast corner of Section 34, T. 32 S, R. 30 E, 

Mount Diablo Base and Meridian; then north to the northwest corner of Section 35, 

T. 31 S, R. 30 E; then northeast along the boundary of the Rancho El Tejon Land Grant 

to the southwest corner of Section 18, T. 31 S, R. 31 E; then east to the southeast corner 

of Section 13, T. 31 S, R. 31 E; then north along the range line common to R. 31 E and 

R. 32 E, Mount Diablo Base and Meridian, to the northwest corner of Section 6, T. 29 S, 
Enclosure 2

California NO2 Areas Boundary Descriptions 

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R. 32 E; then east to the southwest corner of Section 31 T. 28 S, R. 32 E; then north along 

the range line common to R. 31 E and R. 32 E to the northwest corner of Section 6, 

T. 28 S, R. 32 E, then west to the southeast corner of Section 36, T. 27 S, R. 31 E, then 

north along the range line common to R. 31 E and R. 32 E to the Kern-Tulare County 

boundary. 

El Dorado County Air Quality Management District 

All of El Dorado County 

Feather River Air Quality Management District 

(a) All of Sutter County 

(b) All of Yuba County 

Glenn County Air Pollution Control District 

All of Glenn County 

Great Basin Unified Air Pollution Control District 

(a) All of Alpine County 

(b) All of Inyo County 

(c) All of Mono County 

Imperial County Air Pollution Control District 

All of Imperial County 

Lake County Air Quality Management District 

All of Lake County 

Lassen County Air Pollution Control District 

All of Lassen County 

Mariposa County Air Pollution Control District 

All of Mariposa County 

Mendocino County Air Quality Management District 

All of Mendocino County 

Modoc County Air Pollution Control District 

All of Modoc County 

Mojave Desert Air Quality Management District 

(a) That portion of Riverside County which lies east of a line described as follows: 

Beginning at the southwest corner of Section 32, T. 8 S, R. 20 E, San Bernardino Base 

and Meridian, on the Riverside-Imperial County Boundary; then northerly along section 

lines to the northwest corner of Section 5, T. 7 S, R. 20 E; then westerly along the 

township line to the southwest corner of Section 31, T. 6 S, R. 19 E; then northerly along 

the range line to the northwest corner of Section 6, T. 5 S, R. 19 E; then easterly along 
Enclosure 2

California NO2 Areas Boundary Descriptions 

Page 4 of 7 

the township line to the southwest corner of Section 33, T. 4 S, R. 19 E; then northerly 

along section lines to the northwest corner of Section 4, T. 4 S, R. 19 E; then westerly 

along the township lines to the southwest corner of Section 32, T. 3 S, R. 19 E; then 

northerly along section lines to the northwest corner of Section 17, T. 3 S, R. 19 E; then 

westerly along the township line to the southwest corner of Section 7, T. 3 S, R. 19 E; 

then northerly along section lines to the northwest corner of Section 30, T. 2 S, R. 19 E; 

then westerly along the southerly line of Section 24, T. 2 S, R. 18 E, to the southwest 

corner thereof; then northerly along section lines to the northwest corner of Section 13, 

T. 2 S, R. 18 E; then westerly along section lines to the southwest corner of Section 10, 

T. 2 S, R. 18 E; then northerly along section lines to the Riverside-San Bernardino 

County boundary. 

(b) That portion of San Bernardino County east and north of a line described as follows: 

Beginning at the San Bernardino-Riverside County boundary and running north along the 

range line common to R. 3 E and R. 2 E, San Bernardino Base and Meridian; then west 

along the township line common to T. 3 N and T. 2 N to the San Bernardino-Los Angeles 

County boundary. 

Monterey County – Monterey Bay Unified Air Pollution Control District 

All of Monterey County 

San Benito County – Monterey Bay Unified Air Pollution Control District 

All of San Benito County 

Santa Cruz County – Monterey Bay Unified Air Pollution Control District 

All of Santa Cruz County 

North Coast Unified Air Quality Management District

(a) All of Del Norte County 

(b) All of Humboldt County 

(c) All of Trinity County 

Northern Sierra Air Quality Management District 

(a) All of Nevada County 

(b) All of Plumas County 

(c) All of Sierra County 

Northern Sonoma County Air Pollution Control District 

That portion of Sonoma County which lies north and west of a line described as follows: 

Beginning at the southeasterly corner of the Rancho Estero Americano, being on the 

boundary line between Marin and Sonoma Counties, California; thence running northerly 

along the easterly boundary line of said Rancho Estero Americano to the northeasterly 

corner thereof, being an angle corner in the westerly boundary line of Rancho Canada de 

Jonive; thence running along said boundary of Rancho Canada de Jonive westerly, 

northerly and easterly to its intersection with the easterly line of Graton Road; thence 

running along the easterly and southerly line of Graton Road, northerly and easterly to its 

intersection with the easterly line of Sullivan Road; thence running northerly along said 
Enclosure 2

California NO2 Areas Boundary Descriptions 

Page 5 of 7 

easterly line of Sullivan Road to the southerly line of Green Valley Road; thence running 

easterly along the said southerly line of Green Valley Road and easterly along the 

southerly line of State Highway 116, to the westerly line of Vine Hill Road; thence 

running along the westerly and northerly line of Vine Hill Road, northerly and easterly to 

its intersection with the westerly line of Laguna Road; thence running northerly along the 

westerly line of Laguna Road and the northerly projection thereof to the northerly line of 

Trenton Road; thence running westerly along the northerly line of said Trenton Road to 

the easterly line of Trenton-Healdsburg Road; thence running northerly along said 

easterly line of Trenton-Healdsburg Road to the easterly line of Eastside Road; thence 

running northerly along said easterly line of Eastside Road to its intersection with the 

southerly line of Rancho Sotoyome; thence running easterly along said southerly line of 

Rancho Sotoyome to its intersection with the Township line common to Townships 8 and 

9 North, Mount Diablo Meridian; thence running easterly along said township line to its 

intersection with the boundary line between Sonoma and Napa Counties. 

Placer County Air Pollution Control District 

All of Placer County 

Sacramento Metropolitan Air Quality Management District 

All of Sacramento County 

San Diego County Air Pollution Control District 

All of San Diego County 

San Joaquin Valley Unified Air Pollution Control District 

(a) All of San Joaquin County 

(b) All of Stanislaus County 

(c) All of Merced County 

(d) All of Madera County 

(e) All of Fresno County 

(f) All of Kings County 

(g) All of Tulare County 

(h) That portion of Kern County which lies west and north of a line described as follows: 

Beginning at the Kern-Los Angeles County boundary and running north and east along 

the northwest boundary of the Rancho La Libre Land Grant to the point of intersection 

with the range line common to R. 16 W and R. 17 W, San Bernardino Base and Meridian; 

north along the range line to the point of intersection with the Rancho El Tejon Land 

Grant boundary; then southeast, northeast, and northwest along the boundary of the 

Rancho El Tejon Land Grant to the northwest corner of Section 3, T. 11 N, R. 17 W; then 

west 1.2 miles; then north to the Rancho El Tejon Land Grant boundary; then northwest 

along the Rancho El Tejon line to the southeast corner of Section 34, T. 32 S, R. 30 E, 

Mount Diablo Base and Meridian; then north to the northwest corner of Section 35, 

T. 31 S, R. 30 E; then northeast along the boundary of the Rancho El Tejon Land Grant 

to the southwest corner of Section 18, T. 31 S, R. 31 E; then east to the southeast corner 

of Section 13, T. 31 S, R. 31 E; then north along the range line common to R. 31 E and 

R. 32 E, Mount Diablo Base and Meridian, to the northwest corner of Section 6, T. 29 S, 
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California NO2 Areas Boundary Descriptions 

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R. 32 E; then east to the southwest corner of Section 31, T. 28 S, R. 32 E; then north 

along the range line common to R. 31 E and R. 32 E to the northwest corner of Section 6, 

T. 28 S, R. 32 E, then west to the southeast corner of Section 36, T. 27 S, R. 31 E, then 

north along the range line common to R. 31 E and R. 32 E to the Kern-Tulare County 

boundary. 

San Luis Obispo County Air Pollution Control District 

All of San Luis Obispo County 

Santa Barbara County Air Pollution Control District

All of Santa Barbara County 

Shasta County Air Quality Management District 

All of Shasta County 

Siskiyou County Air Pollution Control District 

All of Siskiyou County 

Orange County – South Coast Air Quality Management District 

All of Orange County 

Riverside County – South Coast Air Quality Management District (portion) 

That portion of Riverside County which lies west of a line described as follows: 

Beginning at the southwest corner of Section 32, T. 8 S, R. 20 E, San Bernardino Base 

and Meridian, on the Riverside-Imperial County Boundary; then northerly along section 

lines to the northwest corner of Section 5, T. 7 S, R. 20 E; then westerly along the 

township line to the southwest corner of Section 31, T. 6 S, R. 19 E; then northerly along 

the range line to the northwest corner of Section 6, T. 5 S, R. 19 E; then easterly along 

the township line to the southwest corner of Section 33, T. 4 S, R. 19 E; then northerly 

along section lines to the northwest corner of Section 4, T. 4 S, R. 19 E; then westerly 

along the township lines to the southwest corner of Section 32, T. 3 S, R. 19 E; then 

northerly along section lines to the northwest corner of Section 17, T. 3 S, R. 19 E; then 

westerly along the township line to the southwest corner of Section 7, T. 3 S, R. 19 E; 

then northerly along section lines to the northwest corner of Section 30, T. 2 S, R. 19 E; 

then westerly along the southerly line of Section 24, T. 2 S, R. 18 E, to the southwest 

corner thereof; then northerly along section lines to the northwest corner of Section 13, 

T. 2 S, R. 18 E; then westerly along section lines to the southwest corner of Section 10, 

T. 2 S, R. 18 E; then northerly along section lines to the Riverside-San Bernardino 

County boundary. 

San Bernardino County – South Coast Air Quality Management District (portion) 

That portion of San Bernardino County west and south of a line described as follows: 

Beginning at the San Bernardino-Riverside County boundary and running north along the 

range line common to R. 3 E and R. 2 E; then west along the township line common to 

T. 3 N and T. 2 N to the San Bernardino-Los Angeles County boundary. 
Enclosure 2

California NO2 Areas Boundary Descriptions 

Page 7 of 7 

Los Angeles County – South Coast Air Quality Management District (portion) 

That portion of Los Angeles County which lies south and west of a line described as 

follows: Beginning at the Los Angeles-San Bernardino County boundary and running 

west along the township line common to T.3 N and T.2 N, San Bernardino Base and 

Meridian; then north along the range line common to R.8 W and R.9 W; then west along 

the township line common to T.4 N and T.3 N; then north along the range line common 

to R.12 W and R.13 W to the southeast corner of Section 12, T.5 N, R. 13 W; then west 

along the south boundaries of Sections 12, 11, 10, 9, 8, 7, T.5 N, R. 13 W to the boundary 

of the Angeles National Forest which is collinear with the range line common to R. 13 W 

and R. 14 W; then north and west along the Angeles National Forest boundary to the 

point of intersection with the township line common to T.7 N and T. 6 N (point is at the 

northwest corner of Section 4 in T.6 N, R. 14 W); then west along the township line 

common to T.7 N and T.6 N; then north along the range line common to R. 15 W and 

R. 16 W to the southeast corner of Section 13, T.7 N, R. 16 W; then along the south 

boundaries of Sections 13, 14, 15, 16, 17, 18, T.7 N, R. 16 W; then north along the range 

line common to R.16 W and R. 17 W to the north boundary of the Angeles National 

Forest (collinear with township line common to T.8 N and T.7 N); then west and north 

along the Angeles National Forest boundary to the point of intersection with the south 

boundary of the Rancho La Liebre Land Grant; then west and north along this land grant 

boundary to the Los Angeles-Kern County boundary. 

Tehama County Air Pollution Control District 

All of Tehama County 

Tuolumne County Air Pollution Control District 

All of Tuolumne County 

Ventura County Air Pollution Control District 

All of Ventura County 

Yolo-Solano Air Quality Management District 

(a) All of Yolo County 

(b) That portion of Solano County which lies north and east of a line described as follows: 

Beginning at the intersection of the westerly boundary of Solano County and the 1/4 

section line running east and west through the center of Section 34, T. 6 N, R. 2 W, 

Mount Diablo Base and Meridian, thence east along said 1⁄4 section line to the east 

boundary of Section 36, T. 6 N, R. 2 W, thence south 1⁄2 mile and east 2.0 miles, more or 

less, along the west and south boundary of Los Putos Rancho to the northwest corner of 

Section 4, T. 5 N, R. 1 W, thence east along a line common to T. 5 N and T. 6 N to the 

northeast corner of Section 3, T. 5 N, R. 1 E, thence south along section lines to the 

southeast corner of Section 10, T. 3 N, R. 1 E, thence east along section lines to the south 

1/4 corner of Section 8, T. 3 N, R. 2 E, thence east to the boundary between Solano and 

Sacramento Counties.