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Mountain Top Arboretum Inc

Conserve, enhance, and celebrate our distinctive catskill sanctuary through sustainable horticulture, responsible land stewardship, and innovative educational programming.

Tannersville, NY EIN: 222240075 (IRS) Sign up to see website
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73
Integrity Assessment
Strong transparency
73/100 · methodology

About Mountain Top Arboretum Inc

Mountain Top Arboretum is a public garden in the Catskill Mountains dedicated to displaying and managing native plant communities of the northeastern US, in addition to curating its collection of cold-hardy native and exotic trees.

Founded
Headquarters
Tannersville, NY
Foundation type
Publicly-supported charity (509(a)(2))
IRS subsection
501(c)(03)
Ruling date
Size
medium

Verified certifications

Confirmed against the issuing authority - not self-reported.

IRS Tax-Deductible since 2024

Mission

Conserve, enhance, and celebrate our distinctive catskill sanctuary through sustainable horticulture, responsible land stewardship, and innovative educational programming.

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: 59%
Peer average: 72%
Integrity Assessment This charity: 73
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)
$0.59
Program$0.59

GiveRadar Analysis

Original analysis from GiveRadar's dataset of comparable organizations

From what GiveRadar has verified so far, Mountain Top Arboretum Inc has a complete profile, cross-referenced across 4 independent sources including the IRS.

  • GiveRadar holds 10 years of financial filings for this organization, the most recent for fiscal year 2024 - a deeper filing history than 99% of the 13,585 environment charities in the United States with filings on record. See the filings
  • GiveRadar has cross-referenced this organization across 4 independent sources, led by the IRS - more than 97% of comparable charities. See the sources
  • GiveRadar holds a more complete profile for this organization than for 75% 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 (10 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

Mountain Top Arboretum Inc is a registered environment nonprofit based in Tannersville, NY, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1994 and has been operating for 32 years. Its EIN is 222240075. 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 73/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports $713K in annual revenue. No red flags have been detected.

Mountain Top Arboretum Inc's EIN (Employer Identification Number) is 222240075. 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.

Mountain Top Arboretum Inc has a GiveRadar Integrity Assessment of 73/100. 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 73 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. For comparison, the average integrity assessment for environment charities in United States is 90/100.

Mountain Top Arboretum Inc is located in Tannersville, NY, United States. The organization was established in 1994 and has been active for 32 years.

Based on official tax filings, Mountain Top Arboretum Inc has $713K in annual revenue. It allocates 59% of expenses to programs and services. This is below 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.

Mountain Top Arboretum Inc 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 medium organization. It has $713K in annual revenue.

No red flags have been detected for Mountain Top Arboretum Inc. 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, Mountain Top Arboretum Inc 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 59% 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.

Mountain Top Arboretum is a public garden in the Catskill Mountains dedicated to displaying and managing native plant communities of the northeastern US, in addition to curating its collection of cold-hardy native and exotic trees. Mountain Top Arboretum Inc is classified as an environment organization registered in United States. The organization was founded in 1994.

Among environment charities registered in United States: It allocates 59% of expenses to programs, below the peer average of 72%. Its annual revenue of $713K is below the peer average of $2M.

Yes, donations to Mountain Top Arboretum Inc are generally tax-deductible in the United States. Mountain Top Arboretum Inc is a 501(c)(3) tax-exempt organization. Its EIN is 222240075, 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
59% to programs
Source: IRS 990 (FY2024) why this matters
Unlock exact figures

Filing history

10 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, FY2015, FY2014, FY2013, FY2012, FY2011.
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
5

Leadership

From FY2024 filing

JE
Jennifer H•••••••••
Executive Director

Officers & trustees (2)

Source: Public filings

See full names, roles, and stories

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

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Latest news

From global news sources

No recent news coverage found

News coverage will appear here when articles mention this organization.

Activity timeline

Filings and press mentions, merged

Form filed
$0.7M revenue
FY2024
IRS 990
Form filed
$0.7M revenue
FY2023
IRS 990
Form filed
$0.4M revenue
FY2022
IRS 990
Form filed
$0.6M revenue
FY2021
IRS 990
Form filed
$0.5M revenue
FY2020
IRS 990
Form filed
$0.3M revenue
FY2015
IRS/ProPublica
Form filed
$0.3M revenue
FY2014
IRS/ProPublica
Form filed
$0.2M revenue
FY2013
IRS/ProPublica
Form filed
$0.2M revenue
FY2012
IRS/ProPublica
Form filed
$0.4M revenue
FY2011
IRS/ProPublica

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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 - 2 disclosed in the public registry.
Supplementary verification
ProPublica Nonprofit Explorer
Supplementary verification
Charity Navigator

Data freshness

Last updated
Jun 12, 2026
Registry checked
Jun 6, 2026
Profile completeness
75%

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 · 2 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 · 1994
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 Mountain Top Arboretum Inc

What is Mountain Top Arboretum Inc?
Mountain Top Arboretum Inc is a environment publicly-supported charity (509(a)(2)) based in Tannersville, United States. Mountain Top Arboretum is a public garden in the Catskill Mountains dedicated to displaying and managing native plant communities of the northeastern US, in addition to curating its collection of cold-hardy native and exotic trees.
When was Mountain Top Arboretum Inc founded?
Mountain Top Arboretum Inc was founded in 1994.
Who leads Mountain Top Arboretum Inc?
Jennifer Hemmerlein serves as Executive Director.
Where is Mountain Top Arboretum Inc located?
Headquartered in Tannersville, NY, United States.
What is Mountain Top Arboretum Inc's annual budget?
Annual revenue for fiscal year 2024 is approximately $100K-$1M. 59% of expenses go to program services.
Is Mountain Top Arboretum Inc trustworthy?
Mountain Top Arboretum Inc has a GiveRadar Integrity Assessment of 73 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 Mountain Top Arboretum Inc's registration number?
IRS EIN: 222240075.
What is Mountain Top Arboretum Inc's website?
http://www.mtarboretum.org