Data update history
March 5, 2025
Posted financials
Added Form 990 for fiscal year 2023
February 26, 2025
Updated personnel
Identified 1 new personnel
November 19, 2024
Updated personnel
Identified 3 new personnel
October 31, 2024
Updated personnel
Identified 9 new personnel
December 30, 2023
Posted financials
Added Form 990 for fiscal year 2022
Nonprofit Types
Professional associationsBusiness and community development organizationsEnvironmental organizationsCharities
Issues
Science and technologyEducationEnvironmentCommunity improvementBusiness and industry
Characteristics
Conducts researchEndowed supportTax deductible donationsAccepts online donations
General information
- Address
- 1120 20th St NW Suite 750
- Washington, DC 20036
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- County
- District of Columbia, DC
- Website URL
- aslo.org/
- Phone
- (800) 929-2756
IRS details
- EIN
- 38-1710020
- Fiscal year end
- December
- Taxreturn type
- Form 990
- Year formed
- 1960
- Eligible to receive tax-deductible contributions (Pub 78)
- Yes
Categorization
- NTEE code, primary
- C60: Environmental Education
- NAICS code, primary
- 813920: Professional Associations
- Parent/child status
- Independent
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