Southern California bad air days
Number of days in the South Coast Air Basin with ozone pollution above 70 parts per billion
Created with Raphaël 2.1.2
1990
2000
2010
2020
200
X
0
20
40
60
80
100
120
140
160
180
200
157
126
141
145
132
113
126
116
138
122
123
129
140
126
129
136
148
151
146
154
145
144
138
174
163
170
175
205
199
188
193
