SIP Status Reports

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Status of Idaho Designated Areas

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NOTE: As of 03/12/2021, these reports are no longer being updated.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

Idaho CO (1971) Areas Return to map
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 (ppm) (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
Boise-Northern Ada County Area	Maintenance	11/15/1990	Not Classified	257,440	2019	1.6	Yes	1 / 1		01/17/2002	12/27/2002 67 FR 65713
Idaho Lead (1978) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho Lead (2008) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho NO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho Ozone-1Hr (1979) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho Ozone-8Hr (1997) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho Ozone-8Hr (2008) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho Ozone-8Hr (2015) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho PM-10 (1987) 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	Average Estimated Exceedances (est. exc.) (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
Ada County; Boise	Maintenance (NAAQS revoked)	03/12/1999	Moderate	240,254	2017-2019	0.3	Yes	3 / 3			11/26/2003 68 FR 61106
Bonner County; The Sandpoint Area	Maintenance	11/15/1990	Moderate	40,876	2017-2019	2.0	No	3 / 3	08/23/2010 75 FR 35302	12/14/2011	05/03/2013 78 FR 20001
Power-Bannock Counties; Portneuf Valley Area	Maintenance	11/15/1990	Moderate	72,396	2017-2019	0.7	Yes	3 / 3	08/26/2002 67 FR 48552	06/30/2004	08/14/2006 71 FR 39574
Shoshone County; City of Pinehurst	Maintenance	11/15/1990	Moderate	1,578	2017-2019	0.0	Yes	3 / 3	10/22/2001 66 FR 44304	09/29/2017	10/11/2018 83 FR 45830
Shoshone County; Pinehurst Expansion Area	Maintenance	01/20/1994	Moderate	9,691	2017-2019		No Data	1 / 1	10/22/2001 66 FR 44304	09/29/2017	10/11/2018 83 FR 45830
Idaho PM-2.5 (1997) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho PM-2.5 (2006) Areas Return to map Area designated nonattainment for the 24-hour standard 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 24-Hr (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
Logan	Nonattainment	12/14/2009	Moderate	12,523	2017-2019	33	Yes	8 / 7	10/19/2018 83 FR 52983	09/13/2019
Idaho PM-2.5 (2012) 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
West Silver Valley	Nonattainment	04/15/2015	Moderate	7,497	2017-2019	11.3	Yes	7 / 2	01/22/2019 83 FR 65535	06/02/2020
Idaho SO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Idaho 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.