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Education and Outreach Subcommittee (EOS) Newsletter
Fall 2026
Hello, NADP members. This newsletter is an outlook on major upcoming events, product updates, and recent milestones across NADP. Currently, this newsletter is shared twice per year, in between the fall and spring meetings. This edition summarizes September 2026 updates from all NADP committees.
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Business first.
NADP committees will hold public business meetings between October 15 and 29. Please check the schedule and register at the
meeting webpage.
NADP in the news.
This
news article
features NADP, fish, and frogs, but it’s definitely not a story about deposition effects on wildlife.
Tell us more.
There is still time during the NADP Joint meeting on October 28 for presentations of interest to the wider NADP community. Please contact Jason Lynch for more information
(lynch.jason@epa.gov).
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Program Office:
The NADP Program Office is responsible for assisting with program management and administering NADP operations.
Updates:
The program office has been working on the annual map summaries for 2025 which will be available online soon. Earlier versions of the map summaries are on the NADP
Annual Data Summaries
page.
The 2026 NADP Spring Meeting and Scientific Symposium was held June 9-12, 2026, in Madison, WI. The theme was “Thinking Outside the Bucket: Innovation in a Changing Environment.” We welcomed 70 in-person attendees and 52 virtual attendees from 6 different countries. Video recordings and posters can be viewed
online.
More information about the 2027 Spring Meeting and Scientific Symposium will be shared at the 2026 Fall Business Meeting.
Data from the April 2026 launch of the new PFAS-NTN (PFN) subnetwork will be available on the website soon. Stay tuned!
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NADP Executive Committee
(EC):
The EC is responsible for executing decisions and actions brought forward by the subcommittees, advisory committees, science committees, and ad hoc groups; for making budgetary decisions; and for ensuring program continuity, stability, and balance.
Updates:
The committee is considering recommendations provided by the panelists during the June 2026 session entitled
State, Local and Tribal Concerns Connecting Air Quality to Atmospheric Deposition
(watch the
recording on YouTube).
The PFAS ad hoc committee is also active as PFN prepares to release the first month of data (April 2026) and launch its NADP website. EC is looking forward to the 50th anniversary of the NADP in 2027-2028.
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NADP science committees: science committees are focused on key areas of atmospheric deposition, scientific interest and/or applications.
Aeroallergen Monitoring Science Committee (AMSC)
:
The mission of the AMSC is to engage multidisciplinary stakeholders in advancing the science of aeroallergen monitoring, including identifying emerging technologies, evaluating methods to ensure data quality, coordination of monitoring stations, and possibly serving as a repository of long-term aeroallergen monitoring data.
Updates:
The committee will meet on Thursday October 22, 2026 at 12:00-13:00 pm (CT). AMSC is developing best practices and supporting new operators with troubleshooting as members start running new instruments. The committee is planning to host guest speakers on pollen ID and NASA comparison of ground aeroallergen monitors and satellite data.
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Critical Loads of Atmospheric Deposition (CLAD)
:
The objectives of CLAD are to identify risk to aquatic and terrestrial ecosystems from air pollution and advance the development and application of critical loads of atmospheric deposition to promote ecosystem health in the United States.
Updates:
The business meeting will be held on Thursday October 15 at 12:00 – 14:00 (CT) and will include discussions about future work for the group. This summer the CLAD Working Group hosted presentations on NatureServe biodiversity mapping, climate change vulnerability of lichens, and wildfire contributions to N deposition. Folks interested in joining the Working Group or presenting recent CL research should email Mike Bell
(Michael_d_bell@nps.gov)
for more information. There is a
new publication
on ozone critical levels to protect tree growth by CLAD authors.
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Mercury in the Environment and Links to Deposition Science Committee (MELD)
:
The mission of MELD is to improve our understanding of atmospherically-derived mercury sources, pathways, processes, and effects on the environment.
Updates:
The business meeting will be held on Monday October 26, from 12:00-14:30 pm (CT). In fall 2025, NADP voted to extend the mercury passive network for a year. This MELD meeting will include presentations of data from the mercury passive network, and of a study comparing active and passive mercury samplers in national parks.
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Total Deposition Science Committee (TDep)
:
The mission of TDep is to improve estimates of atmospheric deposition by advancing the science of measuring and modeling atmospheric wet, dry, and total deposition of species such as sulfur and nitrogen by providing a forum for the exchange of information on current and emerging issues within a broad multi-organization context including atmospheric scientists, ecosystem scientists, resource managers, and policy makers.
Updates:
The TDep Science Committee business meeting is scheduled for Monday, October 26, 2026, from 10:00 am to 12:00 pm (CT), and we hope to see you there:
Zoom Registration Link
.
This summer, TDep has been running a webinar series highlighting timely topics in deposition measurements and modeling, and the recordings are now
available online.
The TDep Measurement-Model Fusion (MMF) and Measurement subcommittees are both active and moving forward. MMF is looking ahead to a fall release of updated TDep surfaces, which should be a key milestone for the community. In addition, there will be a special deposition session “Future of Atmospheric Total Deposition Monitoring and Modeling”, at the
American Meteorological Society meeting
in January 2027, offering another opportunity to share progress and ideas.
In other notable developments, EPA included TDep in its annual report,
National Air Quality: Status and Trends of Key Air Pollutants,
and the agency is also launching an internal workgroup focused on measurements and methods to tackle uncertainty in deposition modeling. It’s an exciting time for TDep, with momentum building across science, modeling, and application!
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NADP technical subcommittees: These committees advise the Executive Committee and develop initiatives, projects, and recommendations for program change.
Network Operations Subcommittee (NOS)
:
The mission of the NOS is to provide a forum for discussion and evaluation of issues pertaining to station siting, equipment, and procedures for sampling and analysis in all NADP networks.
Updates:
NOS will meet on Tuesday October 27, starting at 11:00 am. (CT) NOS invites presentations or updates on monitoring during its fall business meeting. Please contact Jason Lynch for more information
(lynch.jason@epa.gov).
The meeting will include a presentation of new site-specific visualizations of NTN data and sample completion criteria.
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Education and Outreach Committee (EOS)
:
The mission of EOS is to coordinate outreach and education activities among the network and scientific subcommittees.
Updates:
The business meeting will be held on Wednesday October 28, at 10:00-11:00 am (CT). The committee is currently updating the NADP Governance Document and the NADP factsheet. If you have new publications, education plans, or outreach projects, please email the listserv or tell us about it at the fall business meeting.
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NADP Advisory Groups: These advisory groups advise the Executive Committee on quality management, quality assurance, and data management for networks and programs.
Quality Assurance Advisory Group (QAAG)
:
QAAG advises the Executive Committee on matters of quality management and quality assurance for the NADP Program Office, networks, and laboratories. The QAAG also makes recommendations on the external QA programs and advises the Executive Committee on matters related to these programs.
Updates:
The committee has a new chair: Kathryn (Kat) McKinnon, who you can contact at
kathryn.mckinnon@slh.wisc.edu.
The 2025 Quality Assurance Report is nearly done and will be shared soon with members. QAAG met on September 28. NADP members interested in QA should contact Kat to self-nominate for membership in QAAG.
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Data Management Advisory Group (DMAG)
:
The DMAG advises the Executive Committee on matters of data management for the NADP Program Office, networks, and laboratories.
Updates:
The workflow to scan NTN field forms using optical character recognition is in its testing phase. The map summaries of 2025 NADP data will be available soon. AMoN maps will have updated symbols and colors for both annual ammonium levels and quarterly breakdowns. The web infrastructure is written to support PFN data, with testing planned once the first datasets become available.
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© 2026 National Atmospheric Deposition Program
465 Henry Mall, Madison, Wisconsin 53706
email: nadp@slh.wisc.edu
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