SIP Status Reports

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Status of Iowa Designated Areas

Iowa 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NOTE: As of 03/12/2021, these reports are no longer being updated.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 Iowa 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)


Iowa CO (1971) Areas     Return to map
 
No designated areas for this pollutant.

Iowa Lead (1978) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa Lead (2008) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(µg/m3)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Pottawattamie County Maintenance 12/31/2011   12,845 2017-2019 0.08 Yes 6 / 6  
 
09/18/2017 10/04/2018
83 FR 50024

Iowa NO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa Ozone-1Hr (1979) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa Ozone-8Hr (1997) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa Ozone-8Hr (2008) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa Ozone-8Hr (2015) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa PM-10 (1987) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa PM-2.5 (1997) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa PM-2.5 (2006) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa PM-2.5 (2012) Areas     Return to map Top of page

No designated areas for this pollutant.

Iowa SO2 (1971) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual/24-Hr
(ppb)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Muscatine County; (part) Maintenance 04/11/1994   24,633     /     1 / 1  
 
04/25/1997 05/18/1998
63 FR 13343

Iowa SO2 (2010) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
3 Year
1-⁠Hour
Design Value
(ppb)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Muscatine Nonattainment 10/04/2013   30,329 2017-2019 25 Yes 6 / 0  
 
   
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.