Understanding Public Views about Air Quality and Air Pollution Sources in the San Joaquin Valley, California

Table 5

Participants’ perception of contributors to air pollution in the San Joaquin Valley versus actual sources.

Problem	All data; mean, SD, rank	Actual contribution; rank (%)
Cars & trucks	3.35, .808, 1	2 (17%)
Windblown dust	3.20, .872, 2	5 (8%)
Factories	3.19, .850, 3	6 (8%)
Pollution from bay area	2.99, .914, 4	3 (15%)
Farms and agriculture	2.98, .954, 5	1 (35%)
Forest fires	2.91, 1.014, 6	4 (9%)
Construction	2.64, .918, 7	8 (.82%)
Blowers and lawn mowers	2.61, .955, 8	7 (.98%)

Actual air pollution contribution calculated based on the 2012 estimated annual average emissions for the San Joaquin Valley Air Basin (Almanac Emission Projection Data, Published in 2013, downloaded from the Air Resources Board website).