Data update history
March 1, 2024
Posted financials
Added Form 990N for fiscal year 2023
April 1, 2023
Posted financials
Added Form 990N for fiscal year 2022
February 1, 2022
Posted financials
Added Form 990N for fiscal year 2021
April 23, 2021
Posted financials
Added Form 990N for fiscal year 2020
February 27, 2020
Updated personnel
Identified 1 new personnel
Nonprofit Types
Professional associationsBusiness and community development organizationsEnvironmental organizationsChapter / child organizationsCharities
Issues
Land and water conservationEnvironmentBusiness and industry
Characteristics
State / local levelTax deductible donationse-Postcard filer
General information
- Address
- 520 Wocester St
- Spring Green, WI 53588
- Metro area
- Madison, WI
- County
- Sauk County, WI
IRS details
- EIN
- 23-7037691
- Fiscal year end
- December
- Taxreturn type
- Form 990-N / Postcard
- Year formed
- 1969
- Eligible to receive tax-deductible contributions (Pub 78)
- Yes
Categorization
- NTEE code, primary
- C30: Natural Resources Conservation and Protection
- NAICS code, primary
- 813920: Professional Associations
- Parent/child status
- Child within group exemption
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