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CLEAN WISCONSIN INC

EIN 39-1413448 MADISON, WI

Browse the largest nonprofits in Wisconsin

Revenue 2025
$5,017,740
Expenses 2025
$3,804,486

Program services were 83.0% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
C20
Classification
1200
Street
634 W MAIN ST STE 300

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).

Other organizations at this address

1 other organization in the IRS Business Master File lists the same street address. matched by us

This address is a suite or unit (STE 300). Organizations that share one are often clients of the same office-services firm, accountant or registered agent rather than related to each other.

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2025

Mission

TO PROTECT AND PRESERVE WISCONSIN'S CLEAN AIR, WATER, AND NATURAL HERITAGE.

  • ENERGY - WORKING TO INCREASE THE STATE'S INVESTMENT IN ENERGY EFFICIENT AND RENEWABLE ENERGY SOURCES, THUS REDUCING GLOBAL WARMING GAS EMISSIONS, BY MOVING WISCONSIN FORWARD WITH THE CLEAN ENERGY JOBS ACT, INCREASING ENERGY EFFICIENCY IN WISCONSIN, REDUCING WISCONSIN'S CONTRIBUTION TO GLOBAL WARMING, PROTECTING WISCONSIN FROM UNSAFE NUCLEAR POWER PLANTS AND TOXIC WASTE, INCREASING RENEWABLE ENERGY IN WISCONSIN, AND STOPPING ALLIANT ENERGY'S PROPOSED COAL PLANT. TODAY'S INNOVATIVE TECHNOLOGIES COMBINED WITH ABUNDANT WISCONSIN RESOURCES, LIKE WIND AND AGRICULTURE BYPRODUCTS, OFFER AN OPPORTUNITY TO CREATE NEW JOBS AND ECONOMIC ACTIVITY WITH CLEAN, EFFICIENT, AND SAFE ENERGY SOURCES.

    Expenses $1,796,937 · Revenue $85,902

  • WATER - WORKING TO PROTECT AND IMPROVE WISCONSIN'S WATERS BY PASSING AND ENFORCING THE GREAT LAKES COMPACT, RESTORING THE GREAT LAKES, PROTECTING WISCONSIN'S GROUNDWATER, REDUCING MERCURY POLLUTION THAT IS CONTAMINATING OUR LAKES AND FISH AND HARMING OUR CITIZENS, AND REDUCING THE AMOUNT OF ANIMAL WASTE, FERTILIZERS AND TOXINS POLLUTING OUR LAKES AND RIVERS.

    Expenses $1,362,297 · Revenue $65,124

As filed on the 2025 return.

Officers and directors · 2025

As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Mark Redsten

    PRESIDENT & CEO

    Total calculated
    $168,736
    From this org
    $159,185
    From related orgs
    $0
    Other
    $9,551
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $138,185
    Bonus
    $16,000
    Other
    $5,000
    Deferred
    $9,551
    Nontaxable benefits
    $0
    Filer's total
    $168,736
  • Arun Soni

    IMMEDIATE PAST CHAIR

    Total calculated
    $0
    Hours/week
    2
  • Josh Neudorfer

    CHAIR

    Total calculated
    $0
    Hours/week
    1
  • Michael Weiss

    DIRECTOR

    Total calculated
    $0
    Hours/week
    2
  • Ann Brodek

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Irina Gokhman

    VICE-CHAIR

    Total calculated
    $0
    Hours/week
    1
  • Christa Wagner

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Jordan Farrell

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Celestine Jeffreys

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Charles Hua

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Isaac Showaki

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Marcelia Nicholson

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Chris Surges

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • John Clancy

    SECRETARY

    Total calculated
    $0
    Hours/week
    1
  • Julia Prohaska

    SECOND VICE-CHAIR

    Total calculated
    $0
    Hours/week
    1
  • Ryan Engelhardt

    TREASURER

    Total calculated
    $0
    Hours/week
    1
  • Elizabeth Feder

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • David Tipson

    VICE PRESIDENT

    Total calculated
    $150,414
    From this org
    $141,900
    From related orgs
    $0
    Other
    $8,514
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $133,900
    Bonus
    $8,000
    Other
    $0
    Deferred
    $8,514
    Nontaxable benefits
    $0
    Filer's total
    $150,414
  • Kathryn Nekola

    GENERAL COUNSEL

    Total calculated
    $143,059
    From this org
    $134,959
    From related orgs
    $0
    Other
    $8,100
    Hours/week
    40
  • Amy Barrilleaux

    COMMUNICATIONS DIRECTOR

    Total calculated
    $134,200
    From this org
    $126,700
    From related orgs
    $0
    Other
    $7,500
    Hours/week
    40
  • Brett Korte

    STAFF ATTORNEY

    Total calculated
    $110,095
    From this org
    $103,830
    From related orgs
    $0
    Other
    $6,265
    Hours/week
    40
  • Sara Walling

    WATER & AGRICULTURE PROGRAM DIRECTOR

    Total calculated
    $118,982
    From this org
    $112,191
    From related orgs
    $0
    Other
    $6,791
    Hours/week
    40

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. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2025
    Revenue
    $5,017,740
    Expenses
    $3,804,486
    Contributions
    $4,809,403
    Grants paid
    $0
  • 2024
    Revenue
    $4,028,197
    Expenses
    $3,523,057
    Contributions
    $3,531,715
    Grants paid
    $0
  • 2023
    Revenue
    $3,111,326
    Expenses
    $2,897,394
    Contributions
    $2,818,792
    Grants paid
    $0
  • 2022
    Revenue
    $2,730,695
    Expenses
    $2,515,016
    Contributions
    $2,488,003
    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
    $2,671,519
    Expenses
    $2,266,366
    Assets (EOY)
    $3,664,321
  • 2020 · 990

    Revenue
    $3,026,218
    Expenses
    $1,932,740
    Assets (EOY)
    $2,936,441
  • 2019 · 990

    Revenue
    $1,505,750
    Expenses
    $1,912,378
    Assets (EOY)
    $1,702,605
  • 2018 · 990

    Revenue
    $2,261,987
    Expenses
    $1,775,081
    Assets (EOY)
    $1,996,685
  • 2017 · 990

    Revenue
    $1,262,018
    Expenses
    $1,905,696
    Assets (EOY)
    $1,659,604
  • 2016 · 990

    Revenue
    $2,649,128
    Expenses
    $1,760,966
    Assets (EOY)
    $2,276,233
  • 2015 · 990

    Revenue
    $1,396,849
    Expenses
    $2,006,383
    Assets (EOY)
    $1,105,840
  • 2014 · 990

    Revenue
    $2,279,180
    Expenses
    $2,133,046
    Assets (EOY)
    $1,881,028
  • 2013 · 990

    Revenue
    $1,004,396
    Expenses
    $1,596,962
    Assets (EOY)
    $1,512,937
  • 2012 · 990

    Revenue
    not reported
    Expenses
    $1,768,024
    Assets (EOY)
    $2,188,647

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

The 10 largest by cash amount. The API serves every itemized grant.

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 2025, the newest we have parsed for this organization.