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SOCIETY FOR FRESHWATER SCIENCE

EIN 43-1109247 ASHLAND, WI

Browse the largest nonprofits in Wisconsin

Revenue 2024
$341,051
Expenses 2024
$300,598

Program services were 90.4% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
U99C
Classification
2000
Street
708 9TH AVE W

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2024

Mission

AN INTERNATIONAL SCIENTIFIC ORGANIZATION WHOSE PURPOSE IS TO PROMOTE FURTHER UNDERSTANDING OF FRESHWATER ECOSYSTEMS AND ECOSYSTEMS AT THE INTERFACE BETWEEN AQUATIC AND TERRESTRIAL HABITATS.

  • STUDENT AWARDS FOR EDUCATION AND ADVANCEMENT AND TRAVEL REIMBURSEMENT FOR ANNUAL MEETING.

    Expenses $124,440

  • INCLUDES QUARTERLY PUBLICATION "JOURNAL OF NORTH AMERICAN BENTHOLOGICAL SOCIETY" AVAILABLE IN BOTH PRINT AND ELECTRONIC MEDIA. ADDITIONALLY, BULLETIN AND MEMBER DIRECTORY DISTRIBUTION. ALL OTHER PROGRAM RELATED EXPENSES.

    Expenses $147,438 · Revenue $220,254

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Frank Akamagwuna

    EARLY CAREER

    Total calculated
    $0
    Hours/week
    1
  • David Arscott

    PRESIDENT

    Total calculated
    $0
    Hours/week
    2
  • Zanethia Barnett

    NON-ACADEMIC

    Total calculated
    $0
    Hours/week
    1
  • Amy Burgin

    PUBCOMM CHAI

    Total calculated
    $0
    Hours/week
    1
  • Sally Entrekin

    PRESIDENT EL

    Total calculated
    $0
    Hours/week
    2
  • Natalie Griffithis

    VICE PRESIDE

    Total calculated
    $0
    Hours/week
    3
  • Anna Hamilton

    FINCOMM CHAI

    Total calculated
    $0
    Hours/week
    3
  • Jim Hood

    ACADEMIC REP

    Total calculated
    $0
    Hours/week
    1
  • Erin Hotchkiss

    PAST VICE PR

    Total calculated
    $0
    Hours/week
    3
  • Sherri Johnson

    PAST PRESIDE

    Total calculated
    $0
    Hours/week
    2
  • Manda Kambikambi

    URV COUNCIL

    Total calculated
    $0
    Hours/week
    1
  • Lauren Kinsman-Costello

    COMMUNICATIO

    Total calculated
    $0
    Hours/week
    1
  • Andreas Leidolf

    EXECUTIVE DI

    Total calculated
    $0
    Hours/week
    20
  • Peter Levi

    TREASURER

    Total calculated
    $0
    Hours/week
    5
  • Abagael Pruitt

    SRC REP

    Total calculated
    $0
    Hours/week
    1
  • Aj Reisinger

    SECRETARY

    Total calculated
    $0
    Hours/week
    2
  • Erasme Uyizeye

    INTL. DELEGA

    Total calculated
    $0
    Hours/week
    1
  • Wil Wolheim

    VICE PRESIDE

    Total calculated
    $0
    Hours/week
    3

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $341,051
    Expenses
    $300,598
    Contributions
    $5,920
    Grants paid
    $0
  • 2023
    Revenue
    $253,622
    Expenses
    $329,551
    Contributions
    $10,237
    Grants paid
    $0
  • 2022
    Revenue
    $389,506
    Expenses
    $334,236
    Contributions
    $1,221
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $353,965
    Expenses
    $158,010
    Assets (EOY)
    $2,423,266
  • 2020 · 990

    Revenue
    $224,155
    Expenses
    $166,936
    Assets (EOY)
    $2,129,032
  • 2019 · 990

    Revenue
    $388,982
    Expenses
    $270,456
    Assets (EOY)
    $1,988,880
  • 2018 · 990

    Revenue
    $324,963
    Expenses
    $330,401
    Assets (EOY)
    $1,743,054
  • 2017 · 990

    Revenue
    $411,119
    Expenses
    $422,157
    Assets (EOY)
    $1,899,811
  • 2016 · 990

    Revenue
    $436,575
    Expenses
    $312,422
    Assets (EOY)
    $1,820,432
  • 2015 · 990

    Revenue
    $317,119
    Expenses
    $299,893
    Assets (EOY)
    $1,696,279
  • 2014 · 990

    Revenue
    $499,978
    Expenses
    $328,031
    Assets (EOY)
    $1,679,053
  • 2013 · 990

    Revenue
    $600,866
    Expenses
    $477,183
    Assets (EOY)
    $1,528,154
  • 2012 · 990

    Revenue
    not reported
    Expenses
    $435,725
    Assets (EOY)
    $1,475,756

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.