Air Environmental Indicators

1997

Amount of Emissions (1996 Tons)

Pollutant

Stationary

Sources

Mobile

Sources

Area

Sources

Totals
Carbon Monoxide (CO) 953 73,882 38,720 113,555
Volatile Organic Compounds (VOCs) 4,247 8,439 13,830 26,516
Nitrogen Oxides (NOx) 687 17,295 6,400 24,382
Total Pollution 5,887 99,616 58,950 164,453
Permitted Air Pollution Sources
Major (> 100 tons actually emitted) 15
Minor (< 100 tons actually emitted) 284
Stage I (Gasoline Service Stations) 248
Transportation (parking) Facilities 29
Total 576
Days Exceeding Standard
Ozone (O3) 0
Carbon Monoxide (CO) 0
Other (PM-10, NOx, SOx, Radiation) 0
Air Quality Index (AQI)
Good Days 218
Moderate Days 145
Unhealthful Days 2
Mobile Source Activity
Registered Vehicles 471,964
Daily Vehicle Miles Travelled (VMT) 21,000,000
Bus Transit Ridership (Total Passengers) 12,127,525
Journey-to-Work Trips using Transit System 3%
Weather
Days Classified as Hazy 69
Number of Days > 90oF 50
Notices of Violation (non-procedural)
Permitted Sources 58
Total (Permitted, Registered, and non-permitted Sources) 69