of 29
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
1/29
Report to the Board
January 23, 2014
1
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
2/29
Air quality standards
Recent high particulate levels
Regional progress
2
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
3/29
Air quality standards Recent high particulate levels
Regional progress
3
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
4/29
Clean Air Act requires U.S. EPA to set andreview air quality standards every five years
Standards are based on health science
Advancements in understanding health impactshave led to more stringent standards over time
Ozone strongly linked to respiratory effects:asthma exacerbation, reduced lung function,
and hospitalization
PM2.5 linked to mortality and hospitalizationfor cardiovascular diseases
4
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
5/29
Standards allow several exceedances Compliance based on calculated value
derived from peak concentrations
This is known as the design value Design value reflects three-year average to
reduce yearly variability
Design values for all sites in a region mustmeet standard
5
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
6/29
Designed to assessstatewide, regional,and local air quality
Rigorous data
quality procedures Determine regional
status regardingstandards
Multiple pollutantsmonitored at sites
More than 250 sites
6
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
7/297
Federal Ozone StandardsCLEANER AIR / MORE PROTECTIVE1979)1-hour0.12 ppm
1997)8-hour0.08 ppm2008)8-hour0.075 ppm
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
8/298
Federal PM2.5 StandardsCLEANER AIR / MORE PROTECTIVE1997)24-hour
65 g/m31997)Annual15 g/m3
2006)24-hour35 g/m32012)Annual12 g/m3
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
9/29
Area 1979)1-Hour0.12 ppm1997)8-Hour0.08 ppm
2008)8-Hour0.075 ppmSouth Coast
San Joaquin ValleySacramento
Desert Areas
San Diego
Ventura
Bay Area
Other areas
= currently meets the standard9
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
10/29
Area 1997)24-Hour65 g/m31997)Annual15 g/m3
2006)24-Hour35 g/m32012)Annual12 g/m3
South Coast San Joaquin Valley Imperial County Sacramento Bay Area Other Areas
= currently meets the standard
10
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
11/29
Air quality standards
Recent high particulate levels Regional progress
11
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
12/29
12
Widespread elevated PM2.5 levels occurredthroughout the State this winter
Resulted in large number of air advisories
Highest values occurred in San Joaquin Valley
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
13/29
13
Very conducive to PM2.5 buildup
Cold temperatures and warm afternoonswith limited vertical mixing
Calm winds and few low pressure systems Drought emergency due to record low
rainfall
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
14/29
14
Staff is completing review of recent data
Expect calculated design values to increase
Impacts on attainment status can then bedetermined
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
15/29
Air quality standards
Factors that affect air quality
Regional progress
15
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
16/29
Many different indicators can be used toassess progress
Legal definition of attainment is based onregional monitor with highest design value
Changes in spatial extent and frequency ofhigh pollution events highlight other aspectsof progress
16
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
17/29
Ozone Design values show uniform progress across all
areas over last decade
Even greater progress in reducing number of high
ozone days
PM2.5 Progress is variable, but both annual and
24-hour concentrations have declined Few sites now exceed the 15mg/m3annual
average standard
17
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
18/29
0.060.070.080.090.1
0.11
0.120.130.140.15
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
8
AagDgVupm
Year
0.08 ppm Standard
0.075 ppm Standard
South CoastSan Joaquin
Sacramento
Bay AreaSan Diego
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
19/29
10
15
20
25
30
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
AnnualAverageDesignValue,g/m3
Year
15 g/m3Standard
12 g/m3Standard
South Coast
San Joaquin
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
20/29
South Coast making continuing progresstowards 2023 attainment
Frequency of exposures improving, with 21%
fewer exceedance days since 2003
Coastal portion meets both 8-hour ozonestandards
Significant reductions in NOx and VOCs stillneeded to achieve 2023 attainment as well asmore stringent 2032 deadline
20
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
21/29
2003
2013
Design Value
ppm
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
22/29
Since 2002, annual average design value hasdecreased almost one-half to 15.6 mg/m3
As of 2012, only one site now exceeds the
15 mg/m3annual and 35 mg/m324-hourstandards
Still evaluating 2013 data
Area has 2014 attainment date for bothstandards
22
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
23/29
San Joaquin Valley shows continued progresstowards 2023 attainment
Frequency of exposure improving, with 35%
fewer exceedance days since 2003
Portions of the Valley meet both 8-hour ozonestandards
Further reductions in NOx still needed toachieve 2023 attainment as well as morestringent 2032 deadline
23
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
24/29
2003 2013
24
Design Value
ppm
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
25/29
Since 2002, annual average design value hasdecreased almost one-third to 16 mg/m3
Portions of the central and southern Valley
remain above the standard
Area has 2014 attainment date for annualstandard and 2019 attainment date for
24-hour standard
25
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
26/29
Classified Severe with 2027 attainmentdeadline for 0.075 ppm 8-hour ozonestandard
Over last three years averaged 35 days above
the 0.075 ppm 8-hour standard
Only one site remains above the 0.08 ppm8-hour ozone standard
Sacramento meets all other federal standardsfor ozone and particulate matter
26
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
27/29
Classified Marginal for the 0.075 ppm 8-hourozone standard with near-term attainmentdeadline
Only one site still above this standard
San Diego meets all other federal standards forozone and particulate matter
Still violates state standards
27
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
28/29
Meets all federal standards for ozone andparticulate matter
Still has violations of state standards
28
8/13/2019 Jan. 23, 2014: California Air Resources Board staff presentation, Air Quality Progress
29/29
Air quality continues to improve statewide
Over 68% of Californians live in communitiesthat meet federal standards
Even within remaining communities, levels
and numbers of exceedance days aredeclining
Our multi-pollutant strategy of NOx, VOCand PM2.5 controls is providing continuing
benefits for ozone and PM2.5
Significant further emission reductions will beneeded to meet ozone standards
29