State Implementation Plan (SIP) Dashboard

What is a SIP?

A State Implementation Plan (SIP) is a collection of regulations and documents used by a state, territory, or local air district to implement, maintain, and enforce the National Ambient Air Quality Standards (NAAQS), and to fulfill other requirements of the Clean Air Act (CAA).

What is included in a SIP?

The contents of a typical SIP fall into three categories:

  1. Regulatory: State-adopted control measures which consist of either state statutes and regulations or source-specific requirements (such as orders and consent decrees);
  2. Non-Regulatory and Quasi-Regulatory: State-submitted components in accordance with the CAA and USEPA Federal SIP implementation regulations and additional requirements promulgated by USEPA to satisfy a mandatory requirement in Section 110 or Part D of the CAA; and
  3. Source Specific SIP Revisions: Facility specific SIP Revisions.

 

For a list of USEPA approved regulations in the New Jersey SIP see Approved Air Quality Implementation Plans in New Jersey | US EPA.  For a list of USEPA approved non-regulatory provisions and quasi-regulatory measures in the New Jersey SIP see EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the New Jersey SIP | US EPA.  For a list of USEPA approved source specific SIP revisions see EPA Approved New Jersey Source-Specific Requirements | US EPA.

Learn more here.

SIP Type SIP Name Action – Date Description
Non-Regulatory and Quasi-Regulatory Equivalent, Alternative Program Demonstration: Clean Air Act Section 185 Requirements for Revoked 1-Hour Ozone National Ambient Air Quality Standard

20241204

 The proposed plan demonstrates an acceptable, equivalent alternative program to fulfill the Clean Air Act (CAA) Section 185 fee requirement for the New Jersey portion of the New York-N. New Jersey-Long Island (NY-NJ-CT) Nonattainment Area classified as Severe-17 for the revoked 1979 1-hour ozone National Ambient Air Quality Standard (NAAQS). This proposal demonstrates that the New Jersey’s Clean Energy Program (NJCEP) is an acceptable alternative program to satisfy the Section 185 fee program requirements for the revoked 1979 1-hour ozone NAAQS.
Non-Regulatory and Quasi-Regulatory Memorandum of Agreement for the Implementation of NJ’s NOx SIP Call Requirements under 40 CFR 51.121(r)(2) between the NJDEP and the USEPA, Region 2

20241125

 This proposed SIP revision in the form of a Memorandum of Agreement (MoA) with the United States Environmental Protection Agency (USEPA) for the Implementation of New Jersey’s NOx SIP Call Requirements under 40 CFR 51.121(r)(2). The MoA is to ensure the continued compliance with the NOx SIP Call under 40 CFR 51.121(r)(2) for the non-Electric Generating Units through the NOx Budget Program. The compliance for the affected Electric Generating Units (EGUs) were subsequently covered by Federal regulations, including but not limited to, the Clean Air Interstate Rule (2009) and Cross-State Air Pollution Rule (2015).
Regulatory New Jersey Rule Adoptions: ACT, ACC II, Low NOx Omnibus and Medium Duty Diesel Vehicle Inspection and Maintenance

20241007

 These rules and SIP Revision incorporate the following Adopted rules into the SIP:  Advanced Clean Trucks (ACT), Advanced Clean Cars II (ACC II), Omnibus and Medium Duty Diesel Vehicle Inspection and Maintenance.
Non-Regulatory and Quasi-Regulatory 70 ppb 8-Hour Ozone Attainment Demonstration, Moderate Classification

20240606

 This proposed SIP revision addresses the Clean Air Act (CAA) attainment demonstration requirements for New Jersey’s multi-state Northern New Jersey-New York-Connecticut (NJ-NY-CT) and Southern New Jersey-Pennsylvania-Delaware-Maryland (NJ-PA-DE-MD) Nonattainment Areas for its moderate classifications for the 2015 70 ppb 8-hour ozone NAAQS.  This proposed SIP also includes for inclusion in New Jersey’s SIP the New Jersey rules adopted on December 2, 2022, at 7:27F-2 that set new Electric Generating Unit (EGU) emission limits starting June 1, 2024, and New Jersey rules adopted on December 2, 2022, at 7:27F-3 that ban #4 and #6 fuel oil, with a compliance date in 2025.
Regulatory Mobile Cargo Handling Equipment at Ports and Rail Yards N.J.A.C. 7:27-34, and 7:27A-3

20231101

 These rules and SIP Revision require diesel mobile cargo handling equipment at ports and intermodal rail yards to apply best available control technology under a phase-in schedule, as zero-emissions technology continues to advance.
Non-Regulatory and Quasi-Regulatory Maintenance of the Fine Particulate Matter (PM2.5) 24-hour 35 µg/m3 NAAQS

20230706

 This SIP revision is the second PM2.5 maintenance plan for the 2006 24-hour PM2.5 standard of 35 micrograms per cubic meter (µg/m3) in accordance with the requirements of CAA Section 175A.  This maintenance plan is a limited maintenance plan (LMP) for PM2.5 for both of New Jersey’s multi-state maintenance areas.  This SIP revision demonstrates New Jersey’s continued compliance with the 2006 PM2.5 24-hour 35 µg/m3 NAAQS.
Non-Regulatory and Quasi-Regulatory 75 ppb 8-Hour Ozone Attainment Demonstration;

75 ppb and 70 ppb 8-Hour Ozone Reasonably Available Control Technology (RACT) Determinations;

75 ppb and 70 ppb 8-Hour Ozone Nonattainment New Source Review (NNSR) Program Compliance Certifications; and,

2017 Periodic Emissions Inventory

20211118

 This SIP revision includes four components. First, the ozone SIP Revision addresses the requirements of the Clean Air Act (CAA) regarding New Jersey’s plan for attaining the 2008 75 ppb 8-hour ozone NAAQS in its Northern New Jersey multi-state nonattainment area by its attainment date of July 20, 2021. Second, this SIP revision includes a Reasonably Available Control Technology (RACT) analysis to address both the 2008 75 ppb and the 2015 70 ppb NAAQS. Third, this SIP Revision addresses the submittal requirements for New Jersey’s NNSR permitting program for the 2008 75 ppb and 2015 70 ppb 8-hour ozone NAAQS and includes the required NNSR Program Compliance Certifications. Fourth, this SIP revision includes the 2017 periodic emissions inventory that will also be the base year inventory for RFP for the 2015 70 ppb 8-hour ozone NAAQS.
Non-Regulatory and Quasi-Regulatory 1971 Primary and Secondary Sulfur Dioxide (SO2) NAAQS Redesignation Request and Maintenance Plan

20211110

 This SIP revision includes a limited maintenance plan requesting the USEPA to redesignate the Warren County nonattainment area to attainment in accordance with the Clean Air Act. This SIP revision meets the requirements for a limited maintenance plan which are: Attainment Inventory, Maintenance Demonstration, Monitoring Network, Verification of Continued Attainment, and Contingency Plan. This document acknowledges the improvement in outdoor sulfur dioxide air quality by demonstrating that SO2 levels are currently well below 85 percent of the SO2 National Ambient Air Quality Standards (NAAQS).
Regulatory Permit and Reporting Requirements for Fumigants and Other HAPs

N.J.A.C. 7:27-8, -16, -17, -21, and -22, and 7:27A-3

20210301

 This proposed rule and SIP revision represents a continuation of the Department’s efforts to address air contaminants in New Jersey through its permitting and emission statements programs. The proposed rulemaking would regulate fumigants and fumigation operations based on potential to emit, rather than weight of raw materials, to provide clarity on the regulatory requirements for these operations. The Department also proposes to regulate three air contaminants that are not currently regulated by the State, to be referred to as New Jersey Hazardous Air Pollutants, and to add 13 air contaminants to the list of toxic air pollutants that must be included in an emission statement submitted by a source otherwise subject to emission statement requirements. The proposed rulemaking includes penalty provisions at N.J.A.C. 7:27A for the proposed amendments to the Air Pollution Control rules.

The proposal also constitutes a revision to New Jersey’s State Implementation Plan (SIP) for the attainment and maintenance of the National Ambient Air Quality Standards for ozone. To the extent that the proposed amendments, repeal, and new rules impact rules in the SIP, this rulemaking constitutes a revision to the SIP. The proposed amendments and new rule at N.J.A.C. 7:27-22 do not constitute a revision to the SIP as those provisions at N.J.A.C. 7:27-22 are not part of the SIP.
Non-Regulatory and Quasi-Regulatory Regional Haze

20200326

 This SIP revision is to protect and improve visibility levels in New Jersey’s Class I Area, the Brigantine Wilderness Area of the Edwin B. Forsythe National Wildlife Refuge. This SIP revision establishes the progress goal for the second planning period (2018 – 2028) for the Brigantine Wilderness Area to help achieve the goal of reaching natural background visibility levels by 2064. This SIP revision also addresses other mandatory SIP elements for regional haze and related issues.
Non-Regulatory and Quasi-Regulatory Infrastructure and Transport SIP Revision for the 70 ppb and 75 ppb 8-hour Ozone NAAQS and Negative Declaration for the Oil and Natural Gas Control Techniques Guidelines (CTGs)

20190513

 This SIP revision includes three components. First, this revision certifies New Jersey’s ability and authority to implement, maintain, and enforce the 2015 8-hour 70 ppb ozone NAAQS, addressing the infrastructure requirements of the Federal Clean Air Act (CAA) Section 110. Second, this revision addresses the interstate transport or “Good Neighbor” requirements of CAA Section 110 for both the 70 ppb and the 75 ppb ozone NAAQS. Third, this revision includes a negative declaration that the Oil and Natural Gas CTGs do not pertain to New Jersey.
Non-Regulatory and Quasi-Regulatory 84 ppb and 75 ppb 8-Hour Ozone Attainment Demonstration
Nonattainment New Source Review Program Compliance Certification

20171222

 This SIP revision addresses the requirements of the Clean Air Act (CAA) regarding New Jersey’s plan for attaining the 2008 75 ppb 8-hour ozone National Ambient Air Quality Standard (NAAQS) in its Northern New Jersey multi-state nonattainment area by its attainment date of July 20, 2018.  This SIP revision also shows that the State is meeting the 1997 84 ppb 8-hour ozone NAAQS. This SIP Revision also addresses the submittal requirements for New Jersey’s Nonattainment New Source Review (NNSR) permitting program for implementing the 75 ppb 2008 ozone NAAQS and includes the required NNSR Program Compliance Certification.
Regulatory Air Emission Control/Permitting Exemptions, Hazardous Air Pollutant Reporting Thresholds, and CAIR NOx Trading NOx Budget Trading Programs Repeal

N.J.A.C. 7:27-8, 16, 17, 19, 21, 22, 30, 31 and 7:27A-3.10

20170807

 This rule and SIP revision consists of three major categories. First, the Department is proposing to amend its permitting rules to provide exemptions for equipment that is used during and after natural and human-caused disasters, and other equipment that has a negligible environmental impact. Second, the Department is updating the HAP reporting thresholds using the most recent science-based methodologies. Third, the Department proposes to repeal N.J.A.C. 7:27-30, CAIR NOx Trading Program, and N.J.A.C. 7:27-31, NOx Budget Program, which have been Federally preempted. Additional proposed amendments conform the administrative penalties to the proposed rules and correct errors and inconsistencies. The proposed repeal and amendments to N.J.A.C. 7:27-22 do not constitute a revision to the SIP as those provisions of N.J.A.C. 7:27-22 are not part of the SIP.
Regulatory Gasoline Transfer Operations, Phase I and Phase II Vapor Recovery Systems TBAC Repeal

Permitting Amendments

N.J.A.C. 7:27-8, 16, 22, 34 and 7:27A-3.10

20171129

 These rule amendments and SIP revision allow new gasoline dispensing facilities to be constructed without Phase II vapor recovery systems, require existing facilities with Phase II systems that are incompatible with onboard vapor recovery (ORVR) systems to decommission the Phase II systems within three years, and require upgrades to the Phase I vapor recovery, tank breathing, and refueling components.  They also repeal t-butyl acetate (TBAC) emissions reporting requirements and proposes amendments to major and minor source permitting requirements to state that the terms of the preconstruction permit are incorporated into and become part of the operating permit, and that the Department will publish public notice of a draft operating permit by posting the notice on its website, rather than in the newspaper.
Regulatory, Non-Regulatory and Quasi-Regulatory Proposed Revisions to the State Implementation Plan (SIP) for New Jersey’s Enhanced Inspection and Maintenance (I/M) Program

20160516

 This SIP revision reflects rule changes to New Jersey’s Inspection and Maintenance (I/M) program.   The proposed changes include the discontinuation of: two-speed idle tests on model year 1981-1995 light duty gasoline vehicles, idle tests on pre-1981 model year light duty gasoline vehicles, idle tests on heavy duty gasoline vehicles, and gas cap leak testing.
Non-Regulatory and Quasi-Regulatory 5-Year Progress Report for Regional Haze

20160628

 This SIP revision is a 5-year progress report for Regional Haze. The report documents New Jersey’s continued progress in reducing emissions within the State resulting in improved visibility levels and demonstrates that the Department will meet New Jersey’s 2018 visibility goal at its Class I area: the Brigantine Wilderness Area in the Edwin B. Forsythe National Wildlife Refuge (Brigantine Wilderness Area).
Non-Regulatory and Quasi-Regulatory

75 ppb 8-Hour Ozone Reasonably Available Control Technology (RACT) Determination

2011 Periodic Emission Inventory

8-Hour Carbon Monoxide Maintenance and Monitoring Plan

20150611

This SIP revision establishes revisions to the existing New Jersey State Implementation Plan (SIP) in accordance with Clean Air Act Requirements for ozone, carbon monoxide and inventories.  The SIP revision includes: 1.  Ozone Reasonably Available Control Measure (RACT) Determination; 2. 2011 Emission Inventory for Ozone Precursors;  3. 2011 Periodic Emissions Inventory for Criteria Pollutants;  4.  Carbon Monoxide Maintenance Plan for the New Jersey portion of the New York-Northern New Jersey-Long Island Carbon Monoxide Maintenance Area; and  5.  Changes to the carbon monoxide air monitoring network.
Non-Regulatory and Quasi-Regulatory Infrastructure and Transport SIP Revision for Lead, Sulfur Dioxide, Nitrogen Dioxide, Ozone, PM2.5 and PM10, Carbon Monoxide and Regional Haze

20141017

 This SIP revision meets the Clean Air Act Section 110 requirements addressing infrastructure, transport, and regional haze . This SIP revision demonstrates to the USEPA that the state has the authority (or infrastructure) to implement, maintain, and enforce an air quality management program that provides for attainment and maintenance of all National Ambient Air Quality Standards.
Non-Regulatory and Quasi-Regulatory 1997 Annual and 2006 Daily Fine Particulate Matter (PM2.5) – Redesignation Request and Maintenance Plan

20121226

 This SIP revision presents the data and information that the USEPA requires in order to redesignate New Jersey’s 1997 annual 15 ug/m3 and 2006 daily 35 ug/m3 PM2.5 nonattainment areas to attainment. The document contains:
(1) air quality monitoring data that shows compliance with the NAAQS;
(2) a summary of control measures that New Jersey has implemented to bring the State into attainment;
(3) a maintenance plan that projects a continuing downward trend in emissions through 2025, and provides a contingency plan for continued monitoring and data evaluation;
(4) transportation conformity budgets.
Regulatory, Non-Regulatory and Quasi-Regulatory New Jersey Vehicle Inspection and Maintenance (I/M) Program – Extension of New Vehicle Exemption

20101012

This SIP revision provides the USEPA with documentation on the emission impacts that will result from a change to New Jersey’s enhanced I/M program.  The change is an extension of the new vehicle inspection exemption from four (4) years to five (5) years.
Non-Regulatory and Quasi-Regulatory 2006 Daily Fine Particulate Matter (PM2.5) – Certification of Infrastructure Requirements

20100115

This certification document (“Certification”) addresses requirements under 42 U.S.C. § 7410(a)(1) and (2) (Sections 110(a)(1) and (2) of the Clean Air Act) for the 2006 daily 35 µg/m3 PM2.5 NAAQS.  New Jersey certifies compliance with these elements through its existing SIP, and as described in this Certification.
Regulatory, Non-Regulatory and Quasi-Regulatory New Jersey Vehicle Inspection and Maintenance (I/M) Program – Rule Changes, I/M Program Modeling and Revised Performance Standard Modeling

20091209

This SIP revision implements changes to its vehicle inspection and maintenance (I/M) program. Changes are being proposed to both Department and Motor Vehicle Commission (MVC) rules to implement these changes that include the following:

  • Emission tests will no longer require the use of a dynamometer.
  • Emission tests will include On-Board Diagnostics (OBD), gas cap, visible smoke and two-speed idle (TSI) tailpipe tests. Repair cost waiver provisions have been removed.
  • Gas cap testing is excluded for vehicles of model year 2001 and newer.
  • Certain classes of vehicles will require annual (more frequent) inspection.
  • Light duty diesel vehicles will now be subject to emission testing.

 

This SIP revision consists of the Department rule changes, the MVC rule changes, and an analysis showing the emissions impact of the proposed changes to the program.
Non-Regulatory and Quasi-Regulatory Regional Haze

20111207

A SIP revision to protect and enhance visibility levels in the Brigantine Wilderness Area of the Edwin B. Forsythe National Wildlife Refuge, a federally designated Class I area. The purpose of this SIP revision is to establish the first Reasonable Progress Goal within the Class I area to help achieve the Congressionally mandated goal of reaching natural background visibility levels by the year 2064. The SIP revision demonstrates that New Jersey will meet the 2018 Uniform Rate of Progress set for Brigantine Wilderness Area by the deadline established in the USEPA regulations. The SIP revision also addresses other mandatory SIP elements for regional haze.
Non-Regulatory and Quasi-Regulatory 1997 Annual Fine Particulate Matter (PM2.5) Attainment Demonstration

20080603

 The purpose of this SIP revision is to demonstrate that New Jersey’s two PM2.5 nonattainment areas are projected to attain the 1997 annual 15 ug/m3 PM2.5 NAAQS by the attainment date, April 5, 2010. This SIP revision also addresses other SIP elements associated with the 1997 PM2.5 NAAQS.
Non-Regulatory and Quasi-Regulatory Update of the early Transportation Conformity Budgets for Mercer County

20080225

 A SIP revision that updates the initial early transportation conformity budgets for PM2.5 to incorporate the latest planning assumptions.
Non-Regulatory and Quasi-Regulatory 1997 Annual Fine Particulate Matter (PM2.5) and 1997 8 Hour Ozone Infrastructure SIP

20080225

 A SIP revision that addresses the requirements under 42 U.S.C. § 7410, Section 110(a)(1) and (2) of the Clean Air Act, for the 1997 8 hour 0.08 ppm ozone and the 1997 annual 15 ug/m3 PM2.5 NAAQS.
Non-Regulatory and Quasi-Regulatory 1997 8 Hour Ozone

20071029

 This SIP revision presents the State’s demonstration that it projects attainment of the  1997 8-Hour 0.08 ppm Ozone NAAQS by the attainment date of June 15, 2010 for it’s two nonattainment areas.  This SIP also includes other SIP elements such as the Reasonably Available Control Measure (RACM) analysis, Reasonable Further Progress (RFP) demonstration, transportation conformity budgets and emission inventories.
Regulatory CAIR

N.J.A.C. 7:27A-3.10, N.J.A.C. 7:27-30, N.J.A.C. 7:27-31.23

20070619

 The Federal Clean Air Interstate Rule (CAIR) program, as established in the Federal rules, starts in 2009 for the annual and ozone season NOx control periods, and 2010 for the annual SO2 control period, and prescribes the participation by New Jersey’s large stationary combustion units in the Federal CAIR cap and trade programs at 40 CFR Part 97, which are designed to reduce emissions of NOx and SO2 in the eastern half of the United States. The Department’s rules allocate the NOx allowances differently than the Federal rules to satisfy the Federal requirements for an abbreviated SIP for CAIR (40 CFR Part 97 Subpart EE and Subpart EEEE).
Non-Regulatory and Quasi-Regulatory 1997 8 Hour Ozone RACT

20070801

 This SIP presents the Reasonably Available Control Technology (RACT) demonstration for the 1997 8 hour ozone 0.08 ppm NAAQS.
Non-Regulatory and Quasi-Regulatory Ozone and PM2.5 Transport SIP

20061222

 This letter describes the State’s plan for addressing the transported emission requirements prescribed in Section 110(a)(2)(D)(i) of the Clean Air Act. The State’s proposed actions include, but are not limited to, the State’s 2/7/2007 RACT proposal, the State’s 2/7/2007 CAIR rule proposal and the anticipated Regional Haze proposal.
Non-Regulatory and Quasi-Regulatory Carbon Monoxide Maintenance Plan
Conformity Budgets for 1 Hour Ozone and PM2.5; and
Statewide 2002 Periodic Emission Inventory

20060501

 This SIP revision includes a carbon monoxide  maintenance plan for Camden County and the nine not-classified areas for the second ten-year compliance period; the Statewide 2002 periodic emission inventory; updated transportation conformity budgets for carbon monoxide and ozone for the northern NJ area; revised general conformity ozone emission budget for McGuire Air Force Base; a PM2.5, transportation conformity budget for northern NJ for the interim period prior to the PM2.5 attainment demonstration SIP;
Non-Regulatory and Quasi-Regulatory Transportation Conformity Budgets for Carbon Monoxide and 1 Hour Ozone

20040503

 This document establishes updated transportation conformity budgets for New Jersey’s Metropolitan Planning Organizations (MPOs) because of changes to emission prediction models.
Non-Regulatory and Quasi-Regulatory Revised Motor Vehicle Emission Inventories and Transportation Conformity Budgets

20030404

 New Jersey Revised Motor Vehicle Emission Inventories and Transportation Conformity Budgets Using the MOBILE6 Model
Regulatory, Non-Regulatory and Quasi-Regulatory Enhanced Inspection and Maintenance (I/M) Program for the State of New Jersey

20021127

 Revision to the State of New Jersey’s enhanced inspection and maintenance (I/M) program State Implementation Plan (SIP) for securing EPA approval for the State to extend the new vehicle emission inspection exemption from the current one inspection cycle (i.e., 2 years) to two inspection cycles (i.e., 4 years).
Non-Regulatory and Quasi-Regulatory Carbon Monoxide Redesignation Request and Maintenance Plan

20020115

 Redesignation Request and Maintenance Plan for the New Jersey Portion of the New York-Northern New Jersey-Long Island Carbon Monoxide Nonattainment Area
Non-Regulatory and Quasi-Regulatory 1 Hour Ozone

20010912

 Update to Meeting the Requirements of the Alternative Ozone Attainment Demonstration Policy:  Additional Emission Reductions, Reasonably Available Control Measure (RACM) Analysis, and Mid-Course Review
Regulatory, Non-Regulatory and Quasi-Regulatory Enhanced Inspection and Maintenance (I/M) Program

20010609

 Proposed SIP Revision: Amendments to New Jersey Division of Motor Vehicles’ Enhanced Inspection and Maintenance Rules
Regulatory, Non-Regulatory and Quasi-Regulatory Enhanced Inspection and Maintenance (I/M) Program

20010504

 Proposed Revisions to the SIP for the Enhanced Inspection and Maintenance (I/M) Program
Non-Regulatory and Quasi-Regulatory 1 Hour Ozone
Rate of Progress Plan
Statewide 1996 Periodic Emission Inventory

20010331

 Revisions to the SIP for the 1 Hour Ozone NAAQS: New Jersey 1996 Actual Periodic Emission Inventory and ozone Rate of Progress (ROP) Plan.
Non-Regulatory and Quasi-Regulatory 1 Hour Ozone

20000204

 Proposed SIP Revision for the 1-Hour Ozone NAAQS: Update to Meeting the Requirements of the Alternative Ozone Attainment Demonstration Policy-Additional Emission Reduction Commitment and Transportation Conformity Budgets
Non-Regulatory and Quasi-Regulatory NOx SIP Call

19990928

 Proposed Revisions to New Jersey’s Ozone and Carbon Monoxide SIPs – Meeting the Requirements of the Regional NOx Cap and Establishment of Transportation Conformity Budgets
Non-Regulatory and Quasi-Regulatory 1 Hour Ozone 15% Rate of Progress Plan

19981123

 Proposed Revision to NJ’s 15% Rate of Progress Plan
Non-Regulatory and Quasi-Regulatory Low Emission Gasoline Program

19981116

 Proposed SIP Revision requesting a waiver under section 211(c)(4)(C) of the Clean Air Act. This request is being made because the proposed new fuel requirements are different from, and more stringent than, the RFG requirements currently in effect in New Jersey. The State has determined that the additional emission reduction benefits that these new gasoline standards would generate will be necessary to (1) meet the new eight-hour NAAQS for ozone and (2) address in part the uncertainty in attaining the one-hour NAAQS.
Non-Regulatory and Quasi-Regulatory 1 Hour Ozone Phase II SIP

19980630

 Proposed revision for the 1 hour Ozone National Ambient Air Quality Standards (NAAQS).
Regulatory, Non-Regulatory and Quasi-Regulatory Inspection and Maintenance Program SIPS

19980605

 Inspection and Maintenance Program SIPs
SIP Type SIP Name Action | Date Description