Pollutant |
National Standard |
Federal Designation and Classification (attainment date) |
California Standard |
State Designation1 |
Ozone |
8-hr Std (2015 NAAQS) 0.070 ppm |
Nonattainment Serious3 |
8-hr Std4 0.07 ppm |
Nonattainment |
8-hr Std (2008 NAAQS) 0.075 ppm |
Nonattainment Severe-15 |
8-hr Std (1997 NAAQS) 0.08 ppm (revoked) |
Nonattainment Severe-15 |
1-hr Std (1979 NAAQS) 0.12 ppb (Revoked) |
Nonattainment5 Severe-15 |
1-hr Std (1988) 0.09 ppm |
Nonattainment |
Particulate Matter 2.5 microns (PM2.5) | 24-hr Std (2012 NAAAQS) 35 µg/m3 | Nonattainment2 Moderate | | |
Annual arithmetic (2012 NAAQS) 12 µg/m3 | Attainment | Annual Arithmetic 12 µg/m3 | Attainment |
Particulate Matter 10 microns (PM10) | 24-hr std (1987 NAAQS) 150 µg/m3 | Attainment - Maintenance Moderate (2013) | 24-hour Std 50 µg/m3 | Nonattainment |
Annual arithmetic mean 20 µg/m3 | Nonattainment |
Carbon Monoxide |
1-hr Std (2011 NAAQS) 35 ppm6 |
Attainment (1998) |
1-hr Std 20 ppm |
Attainment |
8-hr Std (2011 NAAQS) 9 ppm6 |
Attainment (1998) |
8-hr Std 9 ppm |
Attainment |
Lead |
3-month rolling (2008 NAAQS) 0.15 µg/m3 |
Attainment (2011) |
30-day average 1.5
µg/m3 |
Attainment |
Sulfur Dioxide |
1-hr Std (2010 NAAQS) 75 ppb |
Unclassifiable/ Attainment7 |
1-Hr Std 0.25 ppm |
Attainment |
24-hr avg Std 0.04 ppm |
Attainment |
Nitrogen Dioxide |
1-hr Std (2010 NAAQS) 0.100 ppm |
Unclassifiable/ Attainment8 (2012)
|
1-hr Std 0.18 ppm |
Attainment (2012) |
Annual Arithmetic Mean (2010 NAAQS)9 0.053 ppm |
Unclassifiable/ Attainment8 (2012) |
Annual arithmetic mean 0.030 ppm |
|
1 Summary of Historical Designations for State air quality Standards can be found here. A list of pollutants for which California Ambient Air Quality Standards were established and more information on the health and environmental effects specific to each pollutant can be found here.
2 EPA issued Determination of Attainment on 05/10/2017 (82 FR 21711) but the Sacramento Federal PM2.5 Nonattainment Area has not yet been redesignated to Attainment.
3 EPA is currently processing Air Districts' reclassification request from Serious to Severe-15.
4 In 04/2005, the
California Air Resources Board (CARB) approved a new 8-hour standard of 70 ppb and retained the 1-hour standard of 90 ppb.
5 EPA issued Determination of Attainment on 10/18/2012 (77 FR 64036) but the Sacramento Federal Ozone Nonattainment Area has not yet been redesignated to Attainment.
6 The original NAAQS was established in 1971. EPA reviewed both the 1-hour and 8-hour standards and decided to retain these standards in 2011.
7 Attainment /Unclassifiable designation was made as part of
EPA's Air Quality Designations for the 2010 Sulfur Dioxide (SO2) Primary NAAQS - Round 3 designation in 12/2017.
8 EPA designates areas as "unclassifiable/attainment" if they met the standard or are expected to meet the standard despite a lack of monitoring data.
9 The original NAAQS were established in 1971. EPA reviewed and decided to retain the annual arithmetic mean standard in 2010.