Nonpartisan civic infrastructure
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Morton Arboretum

Public charityFed auditsIRS 990
DBA: % MORT
Environment · LISLE, IL · EIN 36-1505770

Federal Audit History

Single audits filed with the Federal Audit Clearinghouse
$6.9M in federal awards expended in FY2025
YearFederal $ expendedAuditorOpinionFlags
2025$6.9MCrowe LLPUnmodified (clean)Low-risk auditee
2024$4.0MPlante & Moran, PLLCUnmodified (clean)Low-risk auditee
2023$2.4MPlante & Moran, PLLCUnmodified (clean)Low-risk auditee
2022$2.8MPlante & Moran, PLLCUnmodified (clean)Low-risk auditee

Federal Programs

Top programs · FY2025
ProgramAgencyExpendedMajor programFindings
Inflation Reduction ACT Urban & Community Forestry ProgramUSDA$2.1MYes0
Inflation Reduction ACT Urban & Community Forestry Program
via Illinois Department of Natural Resources
USDA$1.2MYes0
Community Project Funds - Congressionally Directed SpendingUSDA$439KNo0
Urban and Community Forestry Program
via Illinois Department of Natural Resources
USDA$285KNo0
Urban and Community Forestry Program
via Illinois Department of Natural Resources
USDA$250KNo0
National Leadership GrantsNEA/NEH$233KNo0
Biological Sciences
via Atlanta Botanical Garden
NSF$224KNo0
Climate and Atmospheric ResearchCommerce$206KNo0
Urban and Community Forestry ProgramUSDA$181KNo0
Office of Science Financial Assistance ProgramEnergy$168KNo0
Source: Federal Audit Clearinghouse single audits (required of organizations expending $1,000,000+ in federal awards per year for fiscal years beginning on or after Oct 1, 2024; $750,000 before).