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Lyon Arboretum Association

Fund raising and additional financial support for lyon arboretum located in honolulu, hawaii

Environment Honolulu, HI EIN: 237429693 (IRS) Sign up to see website
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76
Integrity Assessment
Strong transparency
76/100 · methodology

About Lyon Arboretum Association

Lyon arboretum's education department is responsible for educational programming including school tours for k-12 classes, nature day camps for children during school breaks, community classes, and guided tours for visitors. They develop curricula for the various programs, maintain the arboretum social media accounts and website, and coordinate volunteers. Funds from the friends of lyon arboretum (fla) are used to support the educational programs including subsidizing field trip costs to the arboretum for title I public schools. The lyon arboretum field trip kokua program helps to bring these students to lyon to experience the wonders of plants and nature in this unique setting. Fla sponsors the arboretums summer internship program for university students to encourage environmental leadership with 10 weeks of …

Founded
Headquarters
Honolulu, HI
Foundation type
Publicly-supported charity (509(a)(2))
NTEE code
C410
IRS subsection
501(c)(03)
Ruling date
Size
small

Verified certifications

Confirmed against the issuing authority - not self-reported.

IRS Tax-Deductible since 1975

Mission

Fund raising and additional financial support for lyon arboretum located in honolulu, hawaii

Focus areas & reach

· What they work on and where

How it stacks up against peers

· vs. 8 similar environment in United States
Program spending This charity: 77%
Peer average: 72%
Integrity Assessment This charity: 76
Peer average: 90

Concerns

· None found
No red flags found
Screened for IRS revocation history, Open investigations, Governance scandals, Related-party deals, Excessive exec comp.

Where every $1 goes

· FY2024 · IRS 990 (FY2024)
$0.77
Program$0.77
77% to programs beats the peer average (72%) and beats the Charity Navigator "highly efficient" threshold (75%).

GiveRadar Analysis

Original analysis from GiveRadar's dataset of comparable organizations

GiveRadar's verified records show Lyon Arboretum Association with a complete profile, cross-referenced across 4 independent sources including the IRS.

  • GiveRadar has cross-referenced this organization across 4 independent sources, led by the IRS - more than 97% of comparable organizations. See the sources
  • Established in 1975, it predates 85% of the environment charities in the United States GiveRadar has a founding year for. View this cohort
  • GiveRadar holds a more complete profile for this organization than for 82% of the 30,143 environment charities in the United States it tracks, because GiveRadar has verified its financial disclosures and its registration. Most of those have little verified data on record yet. View this cohort
GiveRadar has verified
  • government registration
  • financial records (5 filed years)
  • disclosed leadership
  • a website
  • a contact email
  • a donation page
Not yet verified by GiveRadar
  • an owner-submitted profile claim

Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.

Common questions

· Auto-generated from filings + methodology

Lyon Arboretum Association is a registered environment nonprofit based in Honolulu, HI, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1975 and has been operating for 51 years. Its EIN is 237429693. According to GiveRadar's records, it holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. GiveRadar's Integrity Assessment for the organization is 76/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports $392K in annual revenue. 64 officers and directors are publicly disclosed. No red flags have been detected.

Lyon Arboretum Association's EIN (Employer Identification Number) is 237429693. This is the organization's IRS tax identification number; you can use it to verify tax-exempt status and to look up its Form 990 filings with the IRS.

Lyon Arboretum Association has a GiveRadar Integrity Assessment of 76/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 76 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. The charity allocates 77% of expenses to programs, which contributes positively to its score. For comparison, the average integrity assessment for environment charities in United States is 90/100.

Lyon Arboretum Association is located in Honolulu, HI, United States. The organization was established in 1975 and has been active for 51 years.

Based on official tax filings, Lyon Arboretum Association has $392K in annual revenue. It allocates 77% of expenses to programs and services. This is above the average of 72% for environment charities in United States. Its revenue is below the peer average of $2M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.

Lyon Arboretum Association is classified as an Environment organization, registered in United States. It operates as a Publicly-supported charity (509(a)(2)). By size, it is categorized as a small organization. It has $392K in annual revenue. The organization has 64 disclosed officers and directors.

No red flags have been detected for Lyon Arboretum Association. GiveRadar automatically screens charities for concerning patterns including high executive compensation, low program spending, and missing financial filings. Based on available official data, no issues have been identified.

According to GiveRadar's records, Lyon Arboretum Association holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. It is registered with the Internal Revenue Service (IRS). It reports that 77% of expenses go to programs (the peer average is 72%). You can donate directly through their official donation page linked on their GiveRadar profile. GiveRadar provides data for research and does not endorse any organization. A GiveRadar Integrity Assessment reflects how much public data is available, not whether an organization is safe to donate to, so it is always smart to do your own research before giving.

Lyon arboretum's education department is responsible for educational programming including school tours for k-12 classes, nature day camps for children during school breaks, community classes, and guided tours for visitors. They develop curricula for the various programs, maintain the arboretum social media accounts and website, and coordinate volunteers. Funds from the friends of lyon arboretum (fla) are used to support the educational programs including subsidizing field trip costs to the arboretum for title I public schools. The lyon arboretum field trip kokua program helps to bring these students to lyon to experience the wonders of plants and nature in this unique setting. Fla sponsors the arboretums summer internship program for... Lyon Arboretum Association is classified as an environment organization registered in United States. The organization was founded in 1975.

Among environment charities registered in United States: It allocates 77% of expenses to programs, above the peer average of 72%. Its annual revenue of $392K is below the peer average of $2M.

Yes, donations to Lyon Arboretum Association are generally tax-deductible in the United States. Lyon Arboretum Association is a 501(c)(3) tax-exempt organization. Its EIN is 237429693, which you can use for tax filing purposes. Donors can typically deduct contributions on their federal income tax return if they itemize deductions. Consult a tax professional for guidance specific to your situation.

Annual revenue
$100K-$1M
77% to programs
Source: IRS 990 (FY2024) why this matters
Unlock exact figures

Filing history

5 years on file from IRS 990 (FY2024): revenue, expenses, program spending, assets, and liabilities by fiscal year.

Years on record: FY2024, FY2023, FY2022, FY2021, FY2020.
Financial details are free - with a GiveRadar account

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Taxes

Tax-deductibility for donors

Donations may be tax-deductible for residents of United States under local rules. Confirm with the charity directly.

Always confirm tax treatment with the charity directly or your tax advisor before donating.

Staff & volunteers

From filings and published profiles

Employees
1

Leadership

From FY2024 filing

ME
Melissa D•••••••••••
Treasurer

Officers & trustees (25)

Source: Public filings

See full names, roles, and stories

25 officers and trustees on file - free with a GiveRadar account.

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Latest news

From global news sources

10 articles found

From news sources and the organization. Shown for transparency; news never affects the integrity score.

Activity timeline

Filings and press mentions, merged

Lyon Arboretum joins CTAHR to expand living laboratories for students - University of Hawaii System
Apr 2026
www.hawaii.edu
Summer 2026 Nature Day Camp | Harold L. Lyon Arboretum - UH Manoa
Apr 2026
manoa.hawaii.edu
Grant termination threatens Lyon Arboretum’s seed digitization project - University of Hawaii System
May 2025
www.hawaii.edu
Lyon Arboretum hosts CTAHR event: rare plants, tours, research, more - University of Hawaii System
Mar 2025
www.hawaii.edu
Spring Plant Sale | Harold L. Lyon Arboretum - UH Manoa
Mar 2025
manoa.hawaii.edu
Form filed
$0.4M revenue
FY2024
IRS 990
Community Classes: 2024 Winter and Spring Community Classes | Harold L. Lyon Arboretum - UH Manoa
Jan 2024
manoa.hawaii.edu
Form filed
$0.1M revenue
FY2023
IRS 990
Lyon Arboretum Hawaiʻi rare plant expert retires after 35 years of service - University of Hawaii System
May 2023
www.hawaii.edu
Form filed
$0.1M revenue
FY2022
IRS 990
Largest palm collection in N. America right at Lyon Arboretum - University of Hawaii System
Oct 2022
www.hawaii.edu
Form filed
$0.1M revenue
FY2021
IRS 990
Form filed
$0.1M revenue
FY2020
IRS 990
Article: Get Lost at Lyon Arboretum in Mānoa - UH Manoa
Jul 2020
manoa.hawaii.edu
Get Lost at Lyon Arboretum in Mānoa - HAWAIʻI Magazine
Jul 2020
www.hawaiimagazine.com

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Cause areas in United States

How many charities work in each area, with this charity's area highlighted.

Human Services 322,679
Education 195,586
Arts & Culture 133,128
Advocacy & Civil Rights 128,026
Religion 114,636
Health 98,862
Community Development 56,086
Youth Development 53,450
Environment this charity 30,143
See all cause areas in United States

Most common causes in United States

Causes charities work on most.

Community Development 235,146
Education 159,016
Religion 103,741
Arts & Culture 101,203
Human Rights 76,926
Health 65,250
Youth Development 47,775
Animal Welfare 32,425

Sources and verification

Registration and legal identity
Internal Revenue Service (IRS) - Tax Exempt Organization Search
Financial filings
IRS Form 990 filings - Fiscal year 2024 most recent on file.
Officers and trustees
Internal Revenue Service (IRS) - Tax Exempt Organization Search - 64 disclosed in the public registry.
News and media coverage
GDELT Project + Google News
Supplementary verification
Charity Navigator

Data freshness

Last updated
Jun 12, 2026
Registry checked
Jun 6, 2026
Profile completeness
85%

What we know and don't know

Exactly which public data we hold on this charity. Our score reflects transparency, not impact.

On record · 9
  • Financial data · FY2024 on record
  • Named leadership · 64 officers on file
  • Government registration · Registered with an official registry
  • Mission statement · Published
  • Official website · On record
  • Headquarters address · On file
  • Direct contact · Email or phone published
  • Tax-deductibility · Verified
  • Founding date · 1975
Not available · 2
  • Executive pay
    Top-officer pay not disclosed
  • Programs & activities
    No named programs listed by the charity

Methodology

GiveRadar builds each profile primarily from official government charity registries, supplemented where available by third-party nonprofit databases and news archives, and combines it into a single 0-100 integrity assessment. The exact sources for this charity are listed above. We don't take a cut of any donation, ever.

Read full methodology

Are you the owner or a board member?

If you represent this organization and want to correct or update its data, you can claim this listing to edit details yourself, or email [email protected] with the correct information. We review every request and respond within 30 days.

Quick facts about Lyon Arboretum Association

What is Lyon Arboretum Association?
Lyon Arboretum Association is a environment publicly-supported charity (509(a)(2)) based in Honolulu, United States. Lyon arboretum's education department is responsible for educational programming including school tours for k-12 classes, nature day camps for children during school breaks, community classes, and guided tours for visitors. They develop curricula for the various programs, maintain the arboretum social media accounts and website, and coordinate volunteers. Funds from the friends of lyon arboretum (fla) are used to support the educational programs including subsidizing field trip costs to the arboretum for title I public schools. The lyon arboretum field trip kokua program helps to bring these students to lyon to experience the wonders of plants and nature in this unique setting. Fla sponsors the arboretums summer internship program for university students to encourage environmental leadership with 10 weeks of hands-on learning coordinated by the education department. All the departments at the arboretum are involved in engaging these students in the full range of arboretum experiences. This important program has influenced students educational paths and provides a significant connection as they enter their careers. Fla also co-sponsors community educational classes run by the department. Lyon arboretums facilites & maintenance department is responsible for maintaining the approximately 200 acres of arboretum property as well as buildings and other infrastructure. Funds from friends of lyon arboretum (fla) are used for supplies and equipment needed for this very large responsibility. Equipment purchases are made through the university of hawaiI foundation so they are incorporated into the capital lists maintained by the universitys facilities department, and fla does not have any additional responsibilities for maintenance, repair or replacement costs. Support from fla has enabled lyons facilities & maintenance department to operate more efficiently and effectively. The lyon arboretum micropropagation lab has successfully grown over 300 hawaiian plant taxa using mic
When was Lyon Arboretum Association founded?
Lyon Arboretum Association was founded in 1975.
Who leads Lyon Arboretum Association?
Melissa Duarte-Lopez serves as Treasurer.
Where is Lyon Arboretum Association located?
Headquartered in Honolulu, HI, United States.
What is Lyon Arboretum Association's annual budget?
Annual revenue for fiscal year 2024 is approximately $100K-$1M. 77% of expenses go to program services.
Is Lyon Arboretum Association trustworthy?
Lyon Arboretum Association has a GiveRadar Integrity Assessment of 76 out of 100 (Strong transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
What is Lyon Arboretum Association's registration number?
IRS EIN: 237429693.
What is Lyon Arboretum Association's website?
http://www.friendsoflyon.com