SIP Status Reports

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Status of Oklahoma Designated Areas

Oklahoma Areas by NAAQS
NOTE: As of 03/12/2021, these reports are no longer being updated. For the latest information, see the SIP Status Tools.

Jump to Oklahoma section for: CO (1971) Lead (1978) Lead (2008) NO2 (1971) Ozone-1Hr (1979) Ozone-8Hr (1997) Ozone-8Hr (2008) Ozone-8Hr (2015) PM-10 (1987) PM-2.5 (1997) PM-2.5 (2006) PM-2.5 (2012) SO2 (1971) SO2 (2010)

Oklahoma CO (1971) Areas Return to map
No designated areas for this pollutant.
Oklahoma Lead (1978) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma Lead (2008) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma NO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma Ozone-1Hr (1979) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma Ozone-8Hr (1997) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma Ozone-8Hr (2008) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma Ozone-8Hr (2015) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma PM-10 (1987) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma PM-2.5 (1997) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma PM-2.5 (2006) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma PM-2.5 (2012) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma SO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Oklahoma SO2 (2010) Areas Return to map Top of page
No designated areas for this pollutant.

We have made our best effort to ensure that the data contained in these reports is accurate. We note that there may be brief delays in updating the reports as we receive new state submissions and we take rulemaking action on plans. In order to assist us in providing accurate information, we request that you contact us by clicking on the "Contact Us" link near the top of this page with any comments regarding or corrections to the posted information, including concerns about whether the entries reflect the most recent status.

Current and historical design value data can be found on the EPA Air Quality Design Values website and the EPA Green Book contains comprehensive nonattainment area, designation status, and historical information.

The level of the 1-hour NAAQS for sulfur dioxide is 75 parts per billion (ppb) calculated as the 3-year average of the 99th percentile of the annual distribution of daily maximum 1-hour average concentrations.