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Compensation 990 is an independent service that uses public IRS Form 990 filings as its source data. We clean and standardize this information, but the original filings may contain errors or omissions. Years on this site refer to the organization’s fiscal year end date on the filing.

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Employees Wachusett Earthday Incorporated Mark Koslowske

Mark Koslowske

Trustee/director

Director at Wachusett Earthday Incorporated

Fiscal year ended June 30, 2025. Published on January 25, 2026.

$57,470
2025

Total compensation

Mark Koslowske has been listed as an employee of Wachusett Earthday Incorporated in Form 990 filings since at least fiscal year 2016.

Annual compensation details

$57,470
Director
2025
$58k org
40 hrs/wk
$0
Vice President
2017
$0
Vice President
2016

Total compensation by year

Compare the compensation of Mark Koslowske to:

2025

Other employees at Wachusett Earthday Incorporated

Norma Chanis
Executive Director
$40,000
$40,000 from orgNo related compNo other comp
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Revisions to this profile

January 25, 2026:
2025 Wachusett Earthday Incorporated 990 published
January 24, 2026:
2018 Wachusett Earthday Incorporated 990 published
January 24, 2026:
2017 Wachusett Earthday Incorporated 990 published

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