Mahalo
Houston, TX

WILLOW WATERHOLE GREENSPACE CONSERVANCY INC

EIN 76-0685448
Environment & Animal Welfare Wildlife & Habitat Conservation
Mission

Preserve, restore, and enhance Willow Waterhole Greenway to reduce flooding, protect habitat, and connect people through nature and community.

IRS-recognized 501(c)(3) public charity Contributions are tax-deductible

About WILLOW WATERHOLE GREENSPACE CONSERVANCY INC

Willow Waterhole Greenspace Conservancy is a 501(c)(3) nonprofit that stewards the nearly 300-acre Willow Waterhole Greenway in southwest Houston, a landscape of lakes, prairie, marsh, islands, native plants, wildlife and public trails. The Conservancy manages habitat restoration, public programming, and operations that support flood detention and community recreation. The organization works in close partnership with civic groups, conservation organizations, and government agencies to maintain and expand public access, native prairie and wetland habitat, and nature-based flood mitigation. Willow Waterhole operates volunteer programs, educational events, and ongoing habitat projects to connect residents with the landscape. In the last 2–3 years the Conservancy has increased organizational transparency (audited financial statements and public Form 990 filings through 2023), earned a 2024 Gold Seal of Transparency from Candid/GuideStar, secured a sustainability grant to electrify its maintenance fleet (enabling emissions-free operations), and appointed new leadership to guide continued restoration and public programming.

Notable achievements

Candid (GuideStar) Gold Seal of Transparency (2024)

Earned the Gold Seal in 2024 for publishing detailed financial, leadership, and program information and for maintaining audited financial statements and public Form 990s.

Electrification of maintenance fleet

Received a sustainability grant in 2024 to purchase electric utility vehicles and all‑electric maintenance equipment, enabling emissions‑free grounds operations and reducing annual fuel use and CO2 emissions.

Established multi‑partner restoration and stewardship

Built sustained partnerships with local foundations, Harris County Flood Control District, Houston Parks Board, Houston Audubon, and civic groups to restore prairie and wetlands, expand trails, and maintain continuous public access.

At a glance

Total assets
$3.6M
Annual revenue
$1.6M
Tax status
501(c)(3)Public charity
EIN
76-0685448
Location
Houston, TX
On Mahalo since
May 2026

Financial figures from the IRS Business Master File, the IRS’s registry of tax-exempt organizations.

Recognition

Candid/GuideStar Gold Seal of Transparency (2024).
Recipient of a Green Mountain Energy Sun Club sustainability grant to fund electrification of equipment (2024).
Active partnership network including Kinder Foundation, Houston Parks Board, Harris County Flood Control District, Houston Audubon Society, and multiple local foundations and civic organizations.

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