SIP Status Reports

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Status of Louisiana Designated Areas

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NOTE: As of 03/12/2021, these reports are no longer being updated.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

Louisiana CO (1971) Areas Return to map
No designated areas for this pollutant.
Louisiana Lead (1978) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana Lead (2008) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana NO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana Ozone-1Hr (1979) 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 (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
Baton Rouge Area	Nonattainment (NAAQS revoked)	11/15/1990	Severe-15	732,587	2017-2019	0.093	Yes	27 / 27	03/12/2010 75 FR 6570
Lafayette Area	Maintenance (NAAQS revoked)	11/15/1990	Transitional	221,578	2017-2019	0.075	Yes	1 / 1		05/25/1993	10/17/1995 60 FR 43020
Lake Charles Area	Maintenance (NAAQS revoked)	11/15/1990	Marginal	192,768	2017-2019	0.083	Yes	4 / 4		12/20/1995	06/02/1997 62 FR 24036
New Orleans Area	Maintenance (NAAQS revoked)	11/15/1990	Transitional	865,058	2017-2019	0.084	Yes	1 / 1		04/30/1993	12/01/1995 60 FR 51354
Pointe Coupee Parish Area	Maintenance (NAAQS revoked)	11/15/1990	Marginal	22,802	2017-2019	0.085	Yes	0 / 0		12/20/1995	12/20/1996 62 FR 648
Louisiana Ozone-8Hr (1997) 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 (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
Baton Rouge Area	Maintenance (NAAQS revoked)	06/15/2004	Subpart 2/Moderate	732,587	2017-2019	0.071	Yes	54 / 51	10/12/2010 75 FR 54778	08/31/2010	12/30/2011 76 FR 74000
Louisiana Ozone-8Hr (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 (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
Baton Rouge	Maintenance	07/20/2012	Marginal	732,587	2017-2019	0.071	Yes	3 / 3	06/03/2016 81 FR 26697	05/16/2016	03/21/2017 81 FR 95051
Louisiana Ozone-8Hr (2015) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana PM-10 (1987) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana PM-2.5 (1997) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana PM-2.5 (2006) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana PM-2.5 (2012) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana SO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Louisiana 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
Evangeline Parish (Partial)	Nonattainment	04/09/2018		124	2017-2019		No Data	6 / 0
St. Bernard Parish	Nonattainment	10/04/2013		35,897	2017-2019	44	Yes	6 / 6

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.