Air Quality in Your Neighborhood? Here’s Our List

We examined the air quality of 251 neighborhoods, cities and towns across LA county hour by hour for almost an entire year.
Health
By and

 

Based on our research, we found neighborhoods across Los Angeles county which had the highest number of hours in a year when levels of particulate matter rose to unhealthy levels. We also measured neighborhoods that had the greatest number of hours in a year for low levels of particulate matter.

We looked at the number of hours that the PM 2.5 level was above 100 on the Air Quality Index scale, which is considered unhealthy for asthma sufferers, elderly and other sensitive groups. PM 2.5  — which measures microscopic particles in the air — is one of the variables for calculating AQI. Its levels are generally proportional to AQI. Long-time exposure to PM 2.5 may trigger heart attacks, asthma and other ailments.
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A note of caution: There are many variables that determine air quality. Measuring the number of hours that a neighborhood experiences high levels of PM 2.5 is only one way of understanding the differences in air quality among areas in Los Angeles. Areas that have consistently high levels of PM 2.5, such as Chinatown and Downtown, are often close to major freeways. But the health profile of a neighborhood is made of many factors.

How many hours have you been exposed to the high levels of particulate matter in your neighborhood? Check out our whole list by rank, alphabet and regions.

Have questions about our data?

By Rank
Alphabetical
By Region

By Rank

 

Rank Name Hours
1 Chinatown 147
2 Downtown 116
3 Lincoln Heights 101
4 Echo Park 94
5 Elysian Park 93
6 Marina del Rey 91
7 Pico-Union 91
8 Del Rey 88
9 Historic South-Central 85
10 South Park 85
11 Westlake 84
12 University Park 82
13 Boyle Heights 81
14 Fairfax 80
15 Exposition Park 79
16 West Adams 78
17 Hermosa Beach 78
18 Adams-Normandie 76
19 Culver City 74
20 Baldwin Hills/Crenshaw 74
21 Arleta 73
22 Silver Lake 72
23 Hancock Park 72
24 Walnut 71
25 Beverly Grove 71
26 Vernon 70
27 San Marino 70
28 West Los Angeles 70
29 Northridge 69
30 Mid-City 69
31 Southeast Antelope Valley 68
32 Tujunga Canyons 68
33 Castaic Canyons 68
34 Angeles Crest 68
35 Ridge Route 68
36 Green Meadows 68
37 Vermont Square 68
38 Northeast Antelope Valley 68
39 Century City 67
40 Unincorporated Santa Susana Mountains 67
41 Valley Glen 67
42 Playa Vista 67
43 Pasadena 67
44 Lake Los Angeles 67
45 Leona Valley 67
46 Hawthorne 67
47 Lawndale 66
48 Jefferson Park 66
49 Watts 66
50 Val Verde 65
51 Panorama City 65
52 Leimert Park 65
53 Huntington Park 65
54 Agoura Hills 64
55 Sun Village 64
56 East Compton 64
57 Palmdale 64
58 Agua Dulce 64
59 Hollywood Hills West 64
60 Unincorporated Santa Monica Mountains 64
61 Diamond Bar 64
62 East Hollywood 64
63 Littlerock 64
64 West Hollywood 64
65 Acton 64
66 Lennox 63
67 Los Feliz 63
68 Hasley Canyon 63
69 Koreatown 63
70 Topanga 63
71 South Diamond Bar 63
72 Central-Alameda 62
73 Harbor Gateway 62
74 Malibu 62
75 Willowbrook 62
76 Tujunga 62
77 Walnut Park 62
78 Canoga Park 62
79 Inglewood 62
80 Castaic 62
81 Monrovia 62
82 Ladera Heights 61
83 Duarte 61
84 North Hollywood 61
85 Redondo Beach 61
86 Westwood 61
87 Baldwin Park 60
88 Lopez/Kagel Canyons 60
89 Playa del Rey 60
90 West Hills 60
91 Temple City 60
92 Vincent 60
93 Beverly Crest 59
94 Vermont-Slauson 59
95 Commerce 59
96 Reseda 59
97 West Compton 59
98 Van Nuys 59
99 Venice 59
100 Arcadia 59
101 Maywood 59
102 Rancho Dominguez 58
103 Cheviot Hills 58
104 El Monte 58
105 Sun Valley 58
106 Sherman Oaks 58
107 Torrance 58
108 Broadway-Manchester 58
109 Stevenson Ranch 57
110 Signal Hill 57
111 Santa Fe Springs 57
112 Veterans Administration 57
113 East Pasadena 57
114 Cerritos 57
115 Claremont 57
116 Calabasas 57
117 Santa Clarita 57
118 Cudahy 57
119 Palms 57
120 Gardena 57
121 West Whittier-Los Nietos 57
122 Winnetka 57
123 Hidden Hills 57
124 East Los Angeles 56
125 Cypress Park 56
126 Rowland Heights 56
127 Florence-Firestone 56
128 Irwindale 56
129 Norwalk 56
130 Paramount 56
131 El Sereno 56
132 Valley Village 56
133 East La Mirada 56
134 Rolling Hills 56
135 North Hills 56
136 Chatsworth 56
137 Sierra Madre 56
138 Florence 56
139 View Park-Windsor Hills 55
140 Manhattan Beach 55
141 La Crescenta-Montrose 55
142 Harvard Park 55
143 North Whittier 55
144 West Puente Valley 55
145 Chatsworth Reservoir 55
146 Hollywood 55
147 Sunland 55
148 Pacific Palisades 55
149 Whittier 55
150 Atwater Village 55
151 Monterey Park 55
152 Toluca Lake 55
153 West Carson 55
154 Mission Hills 55
155 Compton 54
156 Hollywood Hills 54
157 Arlington Heights 54
158 Sawtelle 54
159 North El Monte 54
160 Mid-Wilshire 54
161 Shadow Hills 53
162 Hacienda Heights 53
163 Ramona 53
164 Montebello 53
165 Artesia 53
166 Carson 53
167 Hyde Park 53
168 Harvard Heights 53
169 Pico Rivera 53
170 El Segundo 52
171 Wilmington 52
172 Brentwood 52
173 Glendale 52
174 South Whittier 52
175 Rancho Park 52
176 Windsor Square 52
177 Lake View Terrace 52
178 Bell 52
179 Long Beach 52
180 La Habra Heights 52
181 Granada Hills 52
182 Westlake Village 52
183 Industry 51
184 Santa Monica 51
185 Alhambra 51
186 Glendora 50
187 Sylmar 50
188 Beverly Hills 50
189 Bell Gardens 50
190 Bellflower 50
191 San Dimas 50
192 Mar Vista 50
193 Pacoima 50
194 Glassell Park 49
195 Burbank 49
196 Downey 49
197 Rancho Palos Verdes 49
198 Lakewood 49
199 Pico-Robertson 49
200 Woodland Hills 49
201 Rosemead 49
202 Griffith Park 49
203 Alondra Park 48
204 South El Monte 48
205 Bradbury 48
206 West Covina 48
207 South Pasadena 48
208 Hawaiian Gardens 48
209 La Verne 48
210 Sepulveda Basin 47
211 Porter Ranch 47
212 Pomona 47
213 Studio City 47
214 Highland Park 47
215 Beverlywood 47
216 Palos Verdes Estates 47
217 Azusa 46
218 La Canada Flintridge 46
219 Mayflower Village 46
220 Encino 45
221 Lake Balboa 45
222 South Gate 45
223 Lomita 45
224 La Puente 44
225 San Gabriel 44
226 Whittier Narrows 44
227 Tarzana 44
228 Covina 44
229 Lynwood 43
230 Valinda 43
231 Hansen Dam 43
232 Westchester 43
233 Vermont Vista 42
234 Mount Washington 42
235 Altadena 42
236 Bel-Air 42
237 Gramercy Park 42
238 Montecito Heights 39
239 Eagle Rock 39
240 Rolling Hills Estates 39
241 East San Gabriel 39
242 San Pedro 38
243 Athens 37
244 Harbor City 37
245 Manchester Square 36
246 La Mirada 34
247 South San Gabriel 34
248 Vermont Knolls 33
249 Avocado Heights 33
250 Charter Oak 31
251 San Fernando 29

Alphabetical

 

Rank Name Hours
65 Acton 64
18 Adams-Normandie 76
54 Agoura Hills 64
58 Agua Dulce 64
185 Alhambra 51
203 Alondra Park 48
235 Altadena 42
34 Angeles Crest 68
100 Arcadia 59
21 Arleta 73
157 Arlington Heights 54
165 Artesia 53
243 Athens 37
150 Atwater Village 55
249 Avocado Heights 33
217 Azusa 46
20 Baldwin Hills/Crenshaw 74
87 Baldwin Park 60
236 Bel-Air 42
178 Bell 52
189 Bell Gardens 50
190 Bellflower 50
93 Beverly Crest 59
25 Beverly Grove 71
188 Beverly Hills 50
215 Beverlywood 47
13 Boyle Heights 81
205 Bradbury 48
172 Brentwood 52
108 Broadway-Manchester 58
195 Burbank 49
116 Calabasas 57
78 Canoga Park 62
166 Carson 53
80 Castaic 62
33 Castaic Canyons 68
72 Central-Alameda 62
39 Century City 67
114 Cerritos 57
250 Charter Oak 31
136 Chatsworth 56
145 Chatsworth Reservoir 55
103 Cheviot Hills 58
1 Chinatown 147
115 Claremont 57
95 Commerce 59
155 Compton 54
228 Covina 44
118 Cudahy 57
19 Culver City 74
125 Cypress Park 56
8 Del Rey 88
61 Diamond Bar 64
196 Downey 49
2 Downtown 116
83 Duarte 61
239 Eagle Rock 39
56 East Compton 64
62 East Hollywood 64
133 East La Mirada 56
124 East Los Angeles 56
113 East Pasadena 57
241 East San Gabriel 39
4 Echo Park 94
104 El Monte 58
170 El Segundo 52
131 El Sereno 56
5 Elysian Park 93
220 Encino 45
15 Exposition Park 79
14 Fairfax 80
138 Florence 56
127 Florence-Firestone 56
120 Gardena 57
194 Glassell Park 49
173 Glendale 52
186 Glendora 50
237 Gramercy Park 42
181 Granada Hills 52
36 Green Meadows 68
202 Griffith Park 49
162 Hacienda Heights 53
23 Hancock Park 72
231 Hansen Dam 43
244 Harbor City 37
73 Harbor Gateway 62
168 Harvard Heights 53
142 Harvard Park 55
68 Hasley Canyon 63
208 Hawaiian Gardens 48
46 Hawthorne 67
17 Hermosa Beach 78
123 Hidden Hills 57
214 Highland Park 47
9 Historic South-Central 85
146 Hollywood 55
156 Hollywood Hills 54
59 Hollywood Hills West 64
53 Huntington Park 65
167 Hyde Park 53
183 Industry 51
79 Inglewood 62
128 Irwindale 56
48 Jefferson Park 66
69 Koreatown 63
218 La Canada Flintridge 46
141 La Crescenta-Montrose 55
180 La Habra Heights 52
246 La Mirada 34
224 La Puente 44
209 La Verne 48
82 Ladera Heights 61
221 Lake Balboa 45
44 Lake Los Angeles 67
177 Lake View Terrace 52
198 Lakewood 49
47 Lawndale 66
52 Leimert Park 65
66 Lennox 63
45 Leona Valley 67
3 Lincoln Heights 101
63 Littlerock 64
223 Lomita 45
179 Long Beach 52
88 Lopez/Kagel Canyons 60
67 Los Feliz 63
229 Lynwood 43
74 Malibu 62
245 Manchester Square 36
140 Manhattan Beach 55
192 Mar Vista 50
6 Marina del Rey 91
219 Mayflower Village 46
101 Maywood 59
30 Mid-City 69
160 Mid-Wilshire 54
154 Mission Hills 55
81 Monrovia 62
164 Montebello 53
238 Montecito Heights 39
151 Monterey Park 55
234 Mount Washington 42
159 North El Monte 54
135 North Hills 56
84 North Hollywood 61
143 North Whittier 55
38 Northeast Antelope Valley 68
29 Northridge 69
129 Norwalk 56
148 Pacific Palisades 55
193 Pacoima 50
57 Palmdale 64
119 Palms 57
216 Palos Verdes Estates 47
51 Panorama City 65
130 Paramount 56
43 Pasadena 67
169 Pico Rivera 53
199 Pico-Robertson 49
7 Pico-Union 91
89 Playa del Rey 60
42 Playa Vista 67
212 Pomona 47
211 Porter Ranch 47
163 Ramona 53
102 Rancho Dominguez 58
197 Rancho Palos Verdes 49
175 Rancho Park 52
85 Redondo Beach 61
96 Reseda 59
35 Ridge Route 68
134 Rolling Hills 56
240 Rolling Hills Estates 39
201 Rosemead 49
126 Rowland Heights 56
191 San Dimas 50
251 San Fernando 29
225 San Gabriel 44
27 San Marino 70
242 San Pedro 38
117 Santa Clarita 57
111 Santa Fe Springs 57
184 Santa Monica 51
158 Sawtelle 54
210 Sepulveda Basin 47
161 Shadow Hills 53
106 Sherman Oaks 58
137 Sierra Madre 56
110 Signal Hill 57
22 Silver Lake 72
71 South Diamond Bar 63
204 South El Monte 48
222 South Gate 45
10 South Park 85
207 South Pasadena 48
247 South San Gabriel 34
174 South Whittier 52
31 Southeast Antelope Valley 68
109 Stevenson Ranch 57
213 Studio City 47
105 Sun Valley 58
55 Sun Village 64
147 Sunland 55
187 Sylmar 50
227 Tarzana 44
91 Temple City 60
152 Toluca Lake 55
70 Topanga 63
107 Torrance 58
76 Tujunga 62
32 Tujunga Canyons 68
60 Unincorporated Santa Monica Mountains 64
40 Unincorporated Santa Susana Mountains 67
12 University Park 82
50 Val Verde 65
230 Valinda 43
41 Valley Glen 67
132 Valley Village 56
98 Van Nuys 59
99 Venice 59
248 Vermont Knolls 33
37 Vermont Square 68
233 Vermont Vista 42
94 Vermont-Slauson 59
26 Vernon 70
112 Veterans Administration 57
139 View Park-Windsor Hills 55
92 Vincent 60
24 Walnut 71
77 Walnut Park 62
49 Watts 66
16 West Adams 78
153 West Carson 55
97 West Compton 59
206 West Covina 48
90 West Hills 60
64 West Hollywood 64
28 West Los Angeles 70
144 West Puente Valley 55
121 West Whittier-Los Nietos 57
232 Westchester 43
11 Westlake 84
182 Westlake Village 52
86 Westwood 61
149 Whittier 55
226 Whittier Narrows 44
75 Willowbrook 62
171 Wilmington 52
176 Windsor Square 52
122 Winnetka 57
200 Woodland Hills 49

By Region

 

Angeles Forest
The Antelope Valley
Central LA
Eastside
The Harbor
Northeast LA
Northwest County
The Pomona Valley
The San Fernando Valley
The San Gabriel Valley
Santa Monica Mountains
South Bay
South LA
Southeast
The Verdugos
The Westside
These neighborhoods are not included in our database
Carthay
Chesterfield Square
Citrus
Del Aire
Desert View Highlands
Elysian valley
Green Valley
Lancaster
Larchmonk
Northwest Antelope Valley
Northwest Palmdale
Quartz Hill
San Pasqual
South San Jose Hills
Universal City
West San Dimas
Westmont

We map the areas against library of region boundaries created by The Los Angeles Times.