SIP Status Reports

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Status of Designated Areas for the NO2 (1971) NAAQS

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NOTE: As of 03/12/2021, these reports are no longer being updated.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

NO2 (1971) Areas Return to NAAQS selection

Click on the Area name
to view SIP Required Elements

Area

State

Status

Designation
Date

Classification

2010
Population
(state portion)

Meets NAAQS
Basis

Design Value
Annual
(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

Los Angeles-South Coast Air Basin Area

Maintenance

11/15/1990

15,799,134

2019

Yes

0 / 0

02/05/1997

09/22/1998
63 FR 39747

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.