Air Quality in San Diego County

NACAA Fall Membership Meeting, 2007

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America’s Finest City

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Snapshot of San Diego County

• 4,200 square miles– 70 miles of Coastline

• 3.1 million people

• 1.6 million jobs

• 2.2 million vehicles

• 84 million daily VMT

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Inversion Layer

Photochemical SmogPhotochemical Smog

Ocean Breeze

Build-Up of Ozone

Los Angeles

San Diego

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19751975APCD

separatesfrom HealthDepartment

19811981Attains federal

annual NO2 standard19921992

State standard

19561956Monitoring began

at San DiegoPublic Library

19551955Board activates

APCD

19751975First to requirevapor

controlsat gas

stations

19851985Monitoring

beganfor air toxics

20032003Health alertsduring and

after firestorms

19911991Last Stage 1Smog Alert

19791979Last Stage 2

20052005Annual federalPM2.5 standard

attainment

20032003Attains federal1-hour ozone

standard

19951995Attains StateCO standard

19981998Federal

standard

100

80

60

40

20

090 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05

06YEARS

Vehicle Miles Traveled (millions/day)

Countywide Population (100,000s)

Days Over Federal

8-Hour Ozone

Standard

Air Quality Improves Despite Growth

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Lawnmower Exchange

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School Bus Retrofits

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Transborder Truck Retrofits

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Challenges

Thank you.