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Friends of Corte Madera Creek Watershed

Protect and enhance natural ecosystems. Increase public awareness, knowledge, and scientific understanding. Promote diverse and self-sustaining populations of native plants, habitats, wildlife, and fish. Improve water quality, assure …

Environment Larkspur, CA EIN: 680365270 (IRS) Sign up to see website
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76
Integrity Assessment
Strong transparency
76/100 · methodology

About Friends of Corte Madera Creek Watershed

Habitat Restoration: This work includes removal of weeds, planing native plants, and on-going maintenance of several project in our watershed. These include implementation of the Invasive Spartina Project, continued work at three projects started in the 1990s, and two projects at Hal Brown Park in Kentfield. Public Outreach: We publish a newsletter twice a year with a circulation of about 4,000 copies, maintain a website, and write comment letters about project in our watershed. In 2023 we held two bioblitz events, completed updating our brochure, and funded an environmental education program for children. Engineering: This included finalizing the $100% designs and specifications for a project to lower concrete walls along Corte Madera Creek. Most of the work was done in …

Founded
Headquarters
Larkspur, CA
Foundation type
Publicly-supported charity (509(a)(2))
NTEE code
C30
IRS subsection
501(c)(03)
Ruling date
Size
small

Verified certifications

Confirmed against the issuing authority - not self-reported.

IRS Tax-Deductible since 1996

Mission

Protect and enhance natural ecosystems. Increase public awareness, knowledge, and scientific understanding. Promote diverse and self-sustaining populations of native plants, habitats, wildlife, and fish. Improve water quality, assure adequate fresh water. Promote responsible flood management.

Focus areas & reach

· What they work on and where

How it stacks up against peers

· vs. 8 similar environment in United States
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)
$0.85
Program$0.85

GiveRadar Analysis

Original analysis from GiveRadar's dataset of comparable organizations

GiveRadar's verified records show Friends of Corte Madera Creek Watershed with a complete profile, cross-referenced across 3 independent sources including the IRS.

  • It is one of the better-documented environment charities in the United States GiveRadar currently tracks, because GiveRadar has verified its financial disclosures and its registration. Most of those have little verified data on record yet. View this cohort
  • It has more complete contact information than nearly all similar organizations, with a verified website, email, phone and address on record. See national comparisons
  • It has more complete governance disclosure than nearly all similar organizations, because GiveRadar has verified leadership, executive compensation, a mission statement and a founding date. See national comparisons
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

Friends of Corte Madera Creek Watershed is a registered environment nonprofit based in Larkspur, CA, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1996 and has been operating for 30 years. Its EIN is 680365270. 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 $48K in annual revenue. 56 officers and directors are publicly disclosed. No red flags have been detected.

Friends of Corte Madera Creek Watershed's EIN (Employer Identification Number) is 680365270. 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.

Friends of Corte Madera Creek Watershed 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. For comparison, the average integrity assessment for environment charities in United States is 90/100.

Friends of Corte Madera Creek Watershed is located in Larkspur, CA, United States. The organization was established in 1996 and has been active for 30 years.

Based on official tax filings, Friends of Corte Madera Creek Watershed has $48K in annual revenue. 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.

Friends of Corte Madera Creek Watershed 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 $48K in annual revenue. The organization has 56 disclosed officers and directors.

No red flags have been detected for Friends of Corte Madera Creek Watershed. 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, Friends of Corte Madera Creek Watershed 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). 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.

Habitat Restoration: This work includes removal of weeds, planing native plants, and on-going maintenance of several project in our watershed. These include implementation of the Invasive Spartina Project, continued work at three projects started in the 1990s, and two projects at Hal Brown Park in Kentfield. Public Outreach: We publish a newsletter twice a year with a circulation of about 4,000 copies, maintain a website, and write comment letters about project in our watershed. In 2023 we held two bioblitz events, completed updating our brochure, and funded an environmental education program for children. Engineering: This included finalizing the $100% designs and specifications for a project to lower concrete walls along... Friends of Corte Madera Creek Watershed is classified as an environment organization registered in United States. The organization was founded in 1996.

Among environment charities registered in United States: Its annual revenue of $48K is below the peer average of $2M.

Yes, donations to Friends of Corte Madera Creek Watershed are generally tax-deductible in the United States. Friends of Corte Madera Creek Watershed is a 501(c)(3) tax-exempt organization. Its EIN is 680365270, 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
$10K-$100K
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.

Leadership

From FY2024 filing

SA
Sandra G••••••
President

Officers & trustees (16)

Source: Public filings

See full names, roles, and stories

16 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
$0.0M revenue
FY2024
IRS 990
Form filed
$0.0M revenue
FY2023
IRS 990
Form filed
$0.3M revenue
FY2022
IRS 990
Form filed
$0.2M revenue
FY2021
IRS 990
Form filed
$0.2M revenue
FY2020
IRS 990

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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 - 56 disclosed in the public registry.
Supplementary verification
Charity Navigator

Data freshness

Last updated
Jun 12, 2026
Registry checked
Jun 6, 2026
Profile completeness
65%

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 · 56 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 · 1996
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 Friends of Corte Madera Creek Watershed

What is Friends of Corte Madera Creek Watershed?
Friends of Corte Madera Creek Watershed is a environment publicly-supported charity (509(a)(2)) based in Larkspur, United States. Habitat Restoration: This work includes removal of weeds, planing native plants, and on-going maintenance of several project in our watershed. These include implementation of the Invasive Spartina Project, continued work at three projects started in the 1990s, and two projects at Hal Brown Park in Kentfield. Public Outreach: We publish a newsletter twice a year with a circulation of about 4,000 copies, maintain a website, and write comment letters about project in our watershed. In 2023 we held two bioblitz events, completed updating our brochure, and funded an environmental education program for children. Engineering: This included finalizing the $100% designs and specifications for a project to lower concrete walls along Corte Madera Creek. Most of the work was done in 2022; reimbursement was received in 2023. We continue to work in support of replacing teh Saunders Avenue Bridge, a major barrier to steelhead mirgration. Water Quality Monitoring: We maintain temperature loggers in Ross Creek and measure DO periodically. We also maesure the water surface elevation in Corte Madera Creek at the Stadium Way Bridge.
When was Friends of Corte Madera Creek Watershed founded?
Friends of Corte Madera Creek Watershed was founded in 1996.
Who leads Friends of Corte Madera Creek Watershed?
Sandra Guldman serves as President.
Where is Friends of Corte Madera Creek Watershed located?
Headquartered in Larkspur, CA, United States.
What is Friends of Corte Madera Creek Watershed's annual budget?
Annual revenue for fiscal year 2024 is approximately $10K-$100K.
Is Friends of Corte Madera Creek Watershed trustworthy?
Friends of Corte Madera Creek Watershed 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 Friends of Corte Madera Creek Watershed's registration number?
IRS EIN: 680365270.
What is Friends of Corte Madera Creek Watershed's website?
http://[email protected]