Charities United States Science & Technology Walnut Creek Open Space Foundation
Walnut Creek Open Space Foundation logo

Walnut Creek Open Space Foundation

The Walnut Creek Open Space Foundation works to preserve and enhance Walnut Creek's 2700 acres of open space and to educate area residents so that they can enjoy …

Walnut Creek, CA EIN 942607748 · IRS Sign up to see website
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86
Integrity Assessment
Strong transparency
86/100 · methodology

About Walnut Creek Open Space Foundation

Continuing restoration projects in the city of Walnut creek's Open Space

Founded
Headquarters
Walnut Creek, CA
Foundation type
Publicly-supported charity (509(a)(2))
IRS subsection
501(c)(03)
Ruling date
Size
micro

Verified certifications

Confirmed against the issuing authority - not self-reported.

IRS Tax-Deductible since 1980

Mission

The Walnut Creek Open Space Foundation works to preserve and enhance Walnut Creek's 2700 acres of open space and to educate area residents so that they can enjoy this wonderful resource.

Focus areas & reach

· What they work on and where
Science & Technology
Cause tags

How it stacks up against peers

· vs. 8 similar science & technology in United States
Program spending This charity: 86%
Peer average: 55%
Integrity Assessment This charity: 86
Peer average: 90

Red flags

· All clear
IRS revocation history
Open investigations
Governance scandals
Related-party deals
Excessive exec comp

Where every $1 goes

$0.86
Program expenses$0.86 ($19,592)
86% to programs beats the peer average (55%) and beats the Charity Navigator "highly efficient" threshold (75%).

Common questions

· Auto-generated from filings + methodology

Walnut Creek Open Space Foundation is a registered science & technology nonprofit based in Walnut Creek, CA, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1979 and has been operating for 47 years. Its EIN is 942607748. It has a GiveRadar Integrity Assessment of 86/100 (Strong transparency), indicating well-documented governance, financials, and contact details. The organization reports $88K in annual revenue. 37 officers and directors are publicly disclosed. No red flags have been detected.

Walnut Creek Open Space Foundation has a GiveRadar Integrity Assessment of 86/100. 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 86 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. The charity allocates 86% of expenses to programs, which contributes positively to its score. For comparison, the average integrity assessment for science & technology charities in United States is 90/100.

Walnut Creek Open Space Foundation is located in Walnut Creek, CA, United States. The organization was established in 1979 and has been active for 47 years.

Based on official tax filings, Walnut Creek Open Space Foundation has $88K in annual revenue. It allocates 86% of expenses to programs and services. This is above the average of 55% for science & technology charities in United States. Its revenue is below the peer average of $14M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.

Walnut Creek Open Space Foundation is classified as a Science & Technology organization, registered in United States. It operates as a Publicly-supported charity (509(a)(2)). By size, it is categorized as a micro organization. It has $88K in annual revenue. The organization has 37 disclosed officers and directors.

No red flags have been detected for Walnut Creek Open Space Foundation. 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.

Walnut Creek Open Space Foundation has a GiveRadar Integrity Assessment of 86/100 (Strong transparency) and no red flags have been detected, which suggests it is a well-documented organization. It is regulated by the IRS. 86% of expenses go to programs. The peer average is 55%. Visit the Walnut Creek Open Space Foundation profile on GiveRadar for full details before deciding. GiveRadar provides data for research purposes and does not endorse any organization. Always do your own due diligence.

Continuing restoration projects in the city of Walnut creek's Open Space Walnut Creek Open Space Foundation is classified as a science & technology organization registered in United States. The organization was founded in 1979.

Among science & technology charities registered in United States: Walnut Creek Open Space Foundation's GiveRadar Integrity Assessment of 86/100 is in line with the peer average of 90/100. It allocates 86% of expenses to programs, above the peer average of 55%. Its annual revenue of $88K is below the peer average of $14M.

Yes, donations to Walnut Creek Open Space Foundation are generally tax-deductible in the United States. Walnut Creek Open Space Foundation is a 501(c)(3) tax-exempt organization. Its EIN is 942607748, 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.

Verified against 4 official sources, last refreshed .

Annual revenue
$10K-$100K
86% to programs
Source: IRS 990 (FY2025) why this matters
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Filing history

4 years on file from IRS 990 (FY2025): revenue, expenses, program spending, assets, and liabilities by fiscal year.

Years on record: FY2025, FY2024, FY2023, FY2022.
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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.

Leadership

KA
Karl Snover
Treasurer

Officers & trustees (11)

Source: Public filings

BI
Bill H•••
Board Member and Vice President
DA
David O••••
Board Member
EL
Elizabeth H•••••
Board Member and Treasurer
GA
Gary M•••••
Board Member
KA
karl s•••••
board member
KI
Kime S••••
Board Member and President
LE
Lesley H•••
Board Member and Secretary
MA
Mark C•••••
Board Member
PH
Phil J••••••
Board Member
SE
Sean M•••••••
Board Member
TI
Tim O••
Board Member
Full names, contact details & compensation

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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
$0.1M revenue
FY2025
IRS_990
Form filed
$0.1M revenue
FY2024
IRS_990
Form filed
$0.1M revenue
FY2023
IRS_990
Form filed
$0.1M revenue
FY2022
IRS_990

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Peer charities

Other science & technology in United States, by integrity assessment

Charity Score Revenue Program %
Walnut Creek Open Space Foundation This page 86 $88,178 86%
Technology Student Association 93 $229,263 97%
Humanity Plus Inc 90 $263,171 89%
Society for Literature and Science Inc 90 $138,215 67%
Bioinnovations Institute 89 $1.3 million 91%
Collaborative for Leadership in Ayres Sensory Integration 89 $1.8 million -
Alfred e Mann Foundation for Scientific Research 89 $18.1 million -
Citizen Science Foundation 89 $551,176 95%
Blue Marble Space 89 $5.1 million -

Sources and verification

Refreshed

Registration and legal identity
Internal Revenue Service (IRS) - Tax Exempt Organization Search
Financial filings
IRS Form 990 filings - Fiscal year 2025 most recent on file.
Officers and trustees
Internal Revenue Service (IRS) - Tax Exempt Organization Search - 37 disclosed in the public registry.
Supplementary verification
Charity Navigator

Data freshness

Last updated
May 27, 2026
Profile completeness
75%

What we don't know

Honest gaps - our score reflects transparency, not impact

Programs & projects
No named programs listed by the charity
Operating reach
Countries where programs run not specified

Methodology

GiveRadar combines public registry filings, ProPublica Nonprofit Explorer, Charity Navigator, GuideStar, and news archives into a single 0-100 integrity assessment. We don't take a cut of any donation, ever.

Read full methodology

Quick facts about Walnut Creek Open Space Foundation

What is Walnut Creek Open Space Foundation?
Walnut Creek Open Space Foundation is a science & technology publicly-supported charity (509(a)(2)) based in Walnut Creek, United States. Continuing restoration projects in the city of Walnut creek's Open Space
When was Walnut Creek Open Space Foundation founded?
Walnut Creek Open Space Foundation was founded in 1979.
Who leads Walnut Creek Open Space Foundation?
Karl Snover serves as Treasurer.
Where is Walnut Creek Open Space Foundation located?
Headquartered in Walnut Creek, United States.
What is Walnut Creek Open Space Foundation's annual budget?
Annual revenue for fiscal year 2025 is approximately $10K-$100K. 86% of expenses go to program services.
Is Walnut Creek Open Space Foundation trustworthy?
Walnut Creek Open Space Foundation has a GiveRadar Integrity Assessment of 86 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 Walnut Creek Open Space Foundation's registration number?
IRS EIN: 942607748.
What is Walnut Creek Open Space Foundation's website?
http://www.wcosf.org