Regional Haze Planning Work Group

Volcanic Ash Event Hawaii Wilson Fire, California Old Faithful Geyser, Yellowstone National Park, Class I Area, Wyoming Tonto National Monument with Mazatzal Class I Area Wilderness Area behind, Arizona Space Needle with Mount Rainier National Park Class I Area behind, Seattle, Washington
Regional Haze Planning Work Group
Board-approved Scope


The purpose of the WRAP Regional Haze Planning Work Group (RHPWG) is to prepare and implement the framework to support regional planning for the 15-state WESTAR/WRAP region, to protect and improve visibility in Class I federal areas and to assure needed elements will be available for Implementation Plans for the third planning period of the federal Regional Haze Rule (RHR). Regional Haze Implementation Plan preparation is a multi-year effort and must incorporate time for the required consultation and public review process. These plans are to continue protection and improvement efforts of visual air quality for visitors to the 118 Class I federal areas of the WESTAR/WRAP region since the inception of the RHR in 1999.

Changes to the RHR will be considered for the third planning period that has a 2038 nominal milestone date. Review of the existing RHR requirements to address the basic State Implementation Plan planning needs is a starting point. The RHPWG will advocate for changes to the RHR that address strategies for implementation across all WRAP member agencies to address and improve visual air quality. Timely changes to the RHR and release of planning guidance would provide the basis for a successful visibility program in the future. A key element of western visibility planning will be to continue substantive consultation between WRAP members - States, Tribes, Local Air Agencies, Federal Land Managers (FLMs), and U.S. EPA about planning strategies.

Each WESTAR/WRAP region air quality program encompasses unique needs and requires specific emphasis to meet their goals. However, there are certain common themes that weave them together including:
  • Staff (capacity) – there is wide variation in the staff sizes among WRAP members.
  • Sources – there is wide variation across the WESTAR/WRAP region by jurisdiction for types of air pollution sources, emission magnitudes, approaches to emissions control and reduction strategies, contributions of uncontrollable international and natural sources, and other factors.
  • Funding – no significant amount of funding has been available from U.S. EPA for the federally-required regional planning efforts of the past 10+ years. Resources have been largely provided by States and FLMs, with lesser support from U.S. EPA. All WRAP members also contribute in-kind to the regional planning effort.
  • Training (capability) – new personnel across WESTAR/WRAP jurisdictions will need training and other support to participate fully and manage planning efforts for the regional visibility program.

Responsibilities and Deliverables

Workplan Scope Topical Areas
  • Identify work needed and plan uses of WRAP and WESTAR products and services
  • Facilitate support of Implementation Plan development to protect and improve visibility and reduce regional haze in Class I federal areas
  • Discuss needs to link other air quality protection and climate change mitigation and adaptation programs to visibility protection and improvement
  • Provide educational opportunities for the WRAP membership, i.e., States, Tribes, Local Air Agencies, Federal Land Managers, and U.S. EPA, as well as industry and environmental organizations
  • Identify needs and services from the Technical Support System
  • Identify SIP, TIP, and FIP planning target dates
  • Assure collaboration, coordination, and consultation related to visibility protection and improvement between WRAP member agencies
Annual Action Items
  • RHPWG periodic calls and meetings, reports on any deliverables completed
  • Maintain distribution and contact list
  • Prepare RHPWG deliverables and adapt products from other Work Groups and other sources in support of Topical Areas listed above
This work must take into consideration differing levels of expertise, programmatic resources and approaches, cultural necessities, and needs by WESTAR-WRAP member agency. Several of these activities will involve close coordination within WESTAR-WRAP facilitated by the Technical Steering Committee (TSC), as is done with other WRAP Work Groups.

Operations and Reporting

The Co-Chairs will provide a summary report to the TSC at each TSC/WG Co-Chairs meeting, about the status of activities, findings, and work products related to the topics and for the action items described above. Participation in the RHPWG will be dynamic and evolving depending on topics and action items being addressed and the interests of the Work Group’s members. The Co-Chairs, with support from WESTAR/WRAP staff, will maintain a distribution list to be updated when needed. Participation will be tracked on the Regional Haze Planning Work Group web page. No formal detailed workplan is required but welcome. The RHPWG will have regular virtual or in-person meetings arranged by Co-Chairs, at least quarterly. The principal purpose of RHPWG meetings is to provide a regular opportunity for discussion of progress to protect and improve visibility at WESTAR/WRAP region Class I federal areas, air quality planning for the Regional Haze program, and other topics. If necessary, Subcommittees or Teams may be defined by the RHPWG to execute, track, and provide oversight for both in-kind and/or any contractor-supported RHPWG projects, and will meet as needed at self-defined separate intervals. Any active Teams and Subcommittees will report regularly to the RHPWG. The RHPWG Co-Chairs will communicate on relevant matters with the TSC and Board.

Subcommittees and Teams

None at this time.

Active Projects

None at this time.

Work Products and Materials

Round 2 Regional Haze Rule planning effort (click to expand)
The purpose of the WRAP Regional Haze Planning Work Group (RHPWG) is to prepare the framework to support regional planning for the 15 western states, so that needed elements will be available for RH SIP submissions in a timely fashion, to meet the July 2021 deadline for implementation plans to be submitted each of the 15 states and the City of Albuquerque within the WESTAR and WRAP region, for the second planning period of the federal Regional Haze Rule for visibility protection at 118 Class I areas. This includes a training element for new Regional Haze State Implementation Plan (RHSIP) writers, as evidenced by the webinars and resource links found on this webpage.

The RHPWG formed several topical subcommittees from among its members to coordinate and track work by other WRAP Work Groups and contractors, to address elements needed for State Implementation Plan preparation such as:
  • Inventories: current and future (growth projections methodologies by source categories)
  • Develop a transparent and complete monitoring data metric for planning and model projection purposes
  • Database management (including the TSS database)
  • 4-factor analysis for control measures
  • Regional photochemical modeling
  • Assessment of “unknowns” and uncertain categories (natural conditions, international emissions, fire and dust emission, et cetera)
  • Development of Regional Haze SIP package content and progress report template
  • Develop control strategies menu for major western state sources
Links to RHPWG Subcommittees

Work Group Reference Material

WESTAR-WRAP region Point Source emissions data used in Regional Haze modeling scenarios
  • Representative Baseline v2 (RepBase2) and 2028 On The Books v2 (2028OTBa2) (XLS) – data review by WESTAR-WRAP states completed September 18, 2020
  • 2028 On The Books v2 (2028OTBa2) and 2028 Potential Additional Controls v2 (PAC2) (XLS) – data review by WESTAR-WRAP state completed October 9,2020
U.S. Forest Service Regional Haze Contacts in the WESTAR-WRAP region (January 19, 2021)

Communication Framework for Regional Haze Planning Sept. 3, 2019 RHPWG consensus

Regional Haze Principles of Engagement - adopted April 4, 2018

WESTAR and WRAP Joint Operating Agreement - adopted August 1, 2017

Regional Haze Planning Readiness Assessment Project
WESTAR/WRAP Round 2 Regional Haze Work Plan Completion & Results Virtual Remote Meetings 2020-21 (click to expand)
July 20, 2021 – Meeting 10 (final meeting)
Review of current status of TSS data and tool displays
Meeting recording (mp4 format)

May 5, 2021 – Meeting 9
Item 3 presentation
Item 4 presentation
Meeting recording (mp4 format)

April 1, 2021 – Meeting 8
Item 3 presentation
Item 4 presentation
Meeting recording (mp4 format)

March 9, 2021 – Meeting 7
WESTAR-WRAP Regional Haze Work Plan Results Meeting
Meeting recording (mp4 format)

February 18, 2021 – Meeting 6
WESTAR-WRAP Regional Haze Results Meeting – syllabus and items reviewed

December 22, 2020
Informal discussion with NM and MT about Using Rank Point results (mp4 format)

December 17, 2020
Source Contribution Assessment using WRAP products - Idaho and neighbors case study

December 9, 2020
NM Class I area case study use of WEP/AoI results meeting (mp4 format)
Discussion slides
Q&A document subsequent to the meeting

November 19, 2020 – Meeting 5
WESTAR-WRAP Regional Haze Work Plan Results Meeting
Meeting recording (mp4 format)

September 2, 2020 – Meeting 4
WRAP Tribal Data WG Workplan Results for Regional Haze and Modeling Update

July 30, 2020 – Meeting 3, Day 2
Meeting 3, Day 2 recording (mp4 format)

July 23, 2020 – Meeting 3, Day 1
Meeting 3, Day 1 recording (mp4 format)

June 25, 2020 – Meeting 2, Day 2
Meeting 2, Day 2 recording – June 25th session on Modeling methodology topics (mp4 format)

June 23, 2020 – Meeting 2, Day 1
Meeting 2, Day 1 recording – June 23rd session on Modeling results and TSS display (mp4 format)

May 20, 2020 – Meeting 1, Day 2
Meeting 1 Day 2 recording - May 20th session on Emissions Data results (mp4 format)

May 19 , 2020 – Meeting 1, Day 1
Meeting 1 Day 1 recording - May 19th session on Monitoring Data results (mp4 format)

Work Group Meetings

RHPWG Meetings and Materials 2018 through 2020 (click to expand)
April 7, 2020 (Notes)
  1. RTOWG modeling - Ralph Morris (PDF)
  2. March 16th 2028 Potential Additional Controls summary and next steps - David and Tom
  3. Status Update to May 19-20 “WESTAR-WRAP Regional Haze Work Plan Completion & Results Meeting” – Tom
  4. Mobile Source Emissions Inventory Projections project.- David/Jay/Tom (project wiki page: Mobile Source Emissions Inventory Projections Project)
  5. WRAP State Regional Haze Progress Website –Amber (
January 14, 2020 (Notes)

December 3, 2019 WebEx/call

  1. Welcome, Roll Call, Note-taking duties, Agenda Review – Jay Baker, Amber Potts, David Stroh (Notes)
  2. TSS FAQ document review, request for approval – Elias Toon
  3. ADA accessibility need for Washington DoE – Jean-Paul Huys
    • State input roundtable discussion – Amber Potts
  4. Storyboard in the West demonstration / feedback process – Ed Merta
  5. State outreach/planning and timeline update – David Stroh
  6. TSS2 Delivery of modeling products for Regional Haze planning use – Pat Brewer
  7. Proposed Information Collection Request; Comment Request; Regional Haze Regulations (Renewal)” FR notice at: Due January 27th – RHPWG Co-Chairs
  8. Action items / next call date and time – RHPWG Co-Chairs
October 3, 2019 Outreach webex/call recording (MP4 format)

Topics: Sept. 3, 2019 August 6, 2019 July 2, 2019 Agenda

June 20, 2019 Outreach webex/call recording (MP4 format) May 7, 2019 Agenda RHPWG call minutes (DOCX format) Overview of Regional Haze Planning document for consensus approval (DOCX format)

March 20, 2019 Spring Outreach webex recording (MP4 format)
  • Monitoring Data Trend Analysis using TSS
    • Cindy Hollenberg (PDF)
    • Brandon McGuire (PDF)
  • Source Screening, Control Analysis, and Communication (PDF)
March 5, 2019 RHPWG call minutes (DOCX format)

2018 Calls and Meetings

April 4, 2018 RHPWG call minutes (DOCX format)

April 13, 2018 Regional Haze Monitoring vs. Modeling results comparison Audio Recording (MP4 format) Powerpoint (PPTX format)

Materials related to Monitoring Results (PPTX format) – added August 29, 2018

June 5, 2018 RHPWG call notes (PDF format)

August 7, 2018 RHPWG call notes (PDF format)

October 2, 2018 RHPWG bimonthly call agenda and notes

October 5, 2018 RHPWG Shared Database Subcommittee - TSSv2 Progress Report Audio Recording (MP4 format) Powerpoint (PPTX format)

December 11, 2018 RHPWG bimonthly call agenda and notes

December 12, 2018 RHPWG Control Measures Subcommittee / Regional Technical Operations WG – Single Source Identification / Analysis and Cumulative Regional Modeling Methods Audio Recording (MP4 format) Powerpoint (PPTX format)

2017 Round 2 Regional Haze Planning preparatory meetings (click to expand)
June 29th

IMPROVE data and interpretation for Regional Haze planning July 27th

Glide Path and Natural Conditions Teach-In #2 recording (MP4 format) August 31st

Emissions (categories and forecasting) Teach-In #3 recording (MP4 format) October 19th

Modeling Teach-In #4 recording (MP4 format) November 16th

Source Apportionment & Source Control Evaluation (4-factor) Teach-In #5 recording (MP4 format) December 5-7, 2017

Western and National Regional Haze Planning Workshop, Denver (final interactive agenda)
  • December 5 recording (MP4)
  • December 6 recording (MP4)
  • December 7 recording (MP4)

Reference Material
Links to other Resources
  • For Regional Haze Planning Data: WRAP TSS v2 Logo

  • For Information from the First Regional Haze Planning Period: Archived WRAP website Logo