San Joaquin Valley Attainment Status
| Pollutant |
Designation/Classification |
|
Federal
Standardsa |
State
Standardsb |
|
Ozone - One hour |
No Federal Standardf |
Nonattainment/Severe |
|
Ozone - Eight hour |
Nonattainment/Seriouse |
Nonattainment |
|
PM 10 |
Attainmentc |
Nonattainment |
|
PM 2.5 |
Nonattainmentd |
Nonattainment |
|
Carbon Monoxide |
Attainment/Unclassified |
Attainment/Unclassified |
| Nitrogen Dioxide |
Attainment/Unclassified |
Attainment |
|
Sulfur Dioxide |
Attainment/Unclassified |
Attainment |
|
Lead (Particulate) |
No Designation/Classification |
Attainment |
|
Hydrogen Sulfide |
No Federal Standard |
Unclassified |
|
Sulfates |
No Federal Standard |
Attainment |
|
Visibility Reducing Particles |
No Federal Standard |
Unclassified |
|
Vinyl Chloride |
No Federal Standard |
Attainment |
a See 40 CFR Part 81
b See CCR Title 17 Sections 60200-60210
c On September 25, 2008, EPA redesignated the San Joaquin Valley to attainment for the PM10 National Ambient Air Quality Standard (NAAQS) and approved the PM10 Maintenance Plan.
d The Valley is designated nonattainment for the 1997 federal PM2.5 standards. EPA released final designations for the 2006 PM2.5 standards in December 2008 (effective in 2009), designating the Valley as nonattainment for the 2006 PM2.5 standards.
e On April 30, 2007 the Governing Board of the San Joaquin Valley Air
Pollution Control District voted to request EPA to reclassify the San Joaquin
Valley Air Basin as extreme nonattainment for the federal 8-hour ozone
standards. The California Air Resources Board, on June 14, 2007, approved this request. This request must be forwarded to EPA by the California Air Resources
Board and would become effective upon EPA final rulemaking after a notice and
comment process; it is not yet in effect.
f Effective June 15, 2005, the U.S. Environmental Protection Agency (EPA) revoked in the federal 1-hour ozone standard, including associated designations and classifications. However, EPA had previously classified the SJVAB as extreme nonattainment for this standard. Many applicable requirements for extreme 1-hour ozone nonattainment areas continue to apply to the SJVAB.
National
Ambient Air Quality Standardsa
|
Pollutant |
Averaging Time |
Concentration |
|
Ozone |
8 Hour |
0.075 ppm (147 µg/m3)e
|
|
1 Hour |
-----b |
|
Carbon Monoxide |
8 Hour |
9 ppm (10 mg/m3) |
|
1 Hour |
35 ppm (40 mg/m3) |
|
Nitrogen Dioxide |
Annual Arithmetic Mean |
0.053 ppm (100 µg/m3) |
|
Sulfur Dioxide |
Annual Arithmetic Mean |
0.03 ppm (80 µg/m3) |
|
24 Hour |
0.14 ppm (365 µg/m3) |
|
PM 10 |
Annual Arithmetic Mean |
-----d |
|
24 Hour |
150 µg/m3 |
|
PM 2.5 (1997 Standard)c |
Annual Arithmetic Mean |
15 µg/m3 |
|
24 Hour |
65 µg/m3 (replaced)c |
|
PM 2.5 (2006 Standard)c |
Annual Arithmetic Mean |
15 µg/m3 |
|
24 Hour |
35 µg/m3 |
|
Leadf |
Rolling three-month period, evaluated over a three-year period |
0.15 µg/m3 |
| ppm=parts per million |
mg/m3=milligrams per cubic meter |
µg/m3=micrograms per cubic meter |
a See http://epa.gov/air/criteria.html
b 1-Hour ozone standard revoked effective June 15, 2005.
c The 1997 PM 2.5 standards were replaced by the 2006 PM 2.5 standards,
effective December 18, 2006. The 2008 PM 2.5 Plan due to EPA in April 2008
addresses attainment of the 1997 PM 2.5 standards. For this reason, the
District continues to list the 1997 24-hour PM 2.5 standard.
d Annual PM 10 standard revoked effective December 17, 2006.
e EPA finalized the revised (2008) 8-hour ozone standard of 0.075 ppm on March 27, 2008. The 1997 8-hour ozone standard of 0.08 ppm has not been revoked.
f On October 15, 2008, EPA strengthened the lead standard. More information is available
here.
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California Ambient Air Quality Standardsa
|
Pollutant
|
Averaging Time
|
Concentration
|
|
Ozone
|
8 Hour
|
0.070 ppm
(137 µg/m3) |
|
1 Hour
|
0.09 ppm
(180 µg/m3)
|
|
Carbon Monoxide
|
8 Hour
|
9 ppm
(10 mg/m3)
|
|
1 Hour
|
20 ppm
(23 mg/m3)
|
|
Nitrogen Dioxide
|
Annual
Arithmetic
Mean
|
0.030 ppm (56 µg/m3) |
|
1 Hour
|
0.18 ppm (338 µg/m3)
|
|
Sulfur Dioxide
|
|
24 Hour
|
0.04 ppm
(105 µg/m3)
|
|
1 Hour
|
0.25 ppm
(655 µg/m3)
|
|
PM 10
|
Annual
Arithmetic
Mean
|
20 µg/m3 |
|
24 Hour
|
50 µg/m3
|
|
PM 2.5
|
Annual
Arithmetic
Mean
|
12 µg/m3 |
|
24 Hour
|
none |
|
Sulfates
|
24 Hour
|
25 µg/m3
|
|
Lead
|
|
30 Day Average
|
1.5 µg/m3
|
|
Hydrogen Sulfide
|
1 Hour
|
0.03 ppm
(42 µg/m3)
|
|
Vinyl Chloride (chloroethene)
|
24 Hour
|
0.010 ppm
(26 µg/m3)
|
|
Visibility Reducing particles
|
8 Hour
|
see belowb)
|
| ppm=parts per million |
mg/m3=milligrams per cubic meter |
µg/m3=micrograms per cubic meter |
a See http://www.arb.ca.gov/research/aaqs/aaqs2.pdf
b Statewide Visibility Reducing Particle Standard (except Lake Tahoe Air Basin):
Particles in sufficient amount to produce an extinction coefficient of 0.23 per
kilometer when the relative humidity is less than 70 percent. This standard is
intended to limit the frequency and severity of visibility impairment due to
regional haze and is equivalent to a 10-mile nominal visual range.
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