San Joaquin Valley Attainment Status
| Pollutant |
Designation/Classification |
|
Federal
Standardsa |
State
Standardsb |
|
Ozone - One hour |
No Federal Standardf |
Nonattainment/Severe |
|
Ozone - Eight hour |
Nonattainment/Extremee |
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 PM2.5 NAAQS. EPA designated the Valley as nonattainment for the 2006 PM2.5 NAAQS on November 13, 2009 (effective December 14, 2009).
e Though the Valley was initially classified as serious nonattainment for the 1997 8-hour ozone standard, EPA approved Valley reclassification to extreme nonattainment in the Federal Register on May 5, 2010 (effective June 4, 2010).
f Effective June 15, 2005, the U.S. Environmental Protection Agency (EPA) revoked the federal 1-hour ozone standard, including associated designations and classifications. EPA had previously classified the SJVAB as extreme nonattainment for this standard. EPA approved the 2004 Extreme Ozone Attainment Demonstration Plan on March 8, 2010 (effective April 7, 2010). 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)d
|
|
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 |
-----c |
|
24 Hour |
150 µg/m3 |
|
PM 2.5 (1997 Standard) |
Annual Arithmetic Mean |
15 µg/m3 |
|
24 Hour |
65 µg/m3 |
|
PM 2.5 (2006 Standard) |
Annual Arithmetic Mean |
15 µg/m3 |
|
24 Hour |
35 µg/m3 |
|
Leade |
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 Annual PM 10 standard revoked effective December 18, 2006.
d 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. In the January 19, 2010 Federal Register, EPA proposed to revise the 2008 ozone NAAQS of 0.075 ppm to a NAAQS in the range of 0.060 to 0.070 ppm. EPA expects to finalize the revised NAAQS, which will replace the 0.075 ppm NAAQS, by July 29, 2011. More information is available here.
e 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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|
