Stewardship Partners
Stewardship Partners is a Seattle-based nonprofit, founded in 1999, that engages Puget Sound communities as caretakers of land and water through habitat restoration, Salmon-Safe farm certification, urban stormwater biofiltration (Adopt-a-Downspout), and green infrastructure programs for farmers, corporate sponsors, homeowners, schools, and municipal governments.
- Company typePrivate
- Founded1999
- HeadquartersSeattle, WA, United States
- Headcount11–50
- GTM typeB2B and B2C
- OfferingServices
What Stewardship Partners does
Stewardship Partners is a Seattle-based nonprofit organization founded in 1999 to address ecological decline in the Puget Sound region. It operates a portfolio of interconnected environmental programs that combine urban green stormwater infrastructure with agricultural land stewardship. Core programs include Snoqualmie Stewardship (habitat restoration via the Adopt-a-Buffer corporate partnership model), Salmon-Safe certification for farms and urban sites in western Washington (since 2004), the Adopt-a-Downspout / Box of Rain initiative that installs biofiltration planter boxes under elevated roadway downspouts to filter toxic tire chemicals (6PPD-quinone) from stormwater, the 12,000 Rain Gardens and RainChangers public-awareness campaigns, and the City Habitats cross-sector coalition.
The organization serves a diversified stakeholder base: farmers and agricultural landowners in the Snoqualmie Valley and wider Puget Sound region, corporate partners (Boeing, Microsoft, Starbucks, Tableau, Patagonia, DLR Group, Campbell Global), homeowners participating in rain garden rebate programs, schools (e.g., Carnation Elementary), and municipal/county governments (Seattle Public Utilities, King County, WSDOT). It also convenes the annual Green Infrastructure Summit of the Salish Sea (250+ partners in 2025) and the Feast on the Farm fundraiser.
Its business model is donation- and grant-based, supplemented by corporate sponsorships for Adopt-a-Buffer and Adopt-a-Downspout sites (approximately $10,000 per Adopt-a-Downspout site) and event revenue. The organization is governed by a Board of Directors and operates with a staff of approximately 10, having rebuilt its full field crew in 2024 for the first time since pre-Covid. Notable technical and operational outputs include a 92% 6PPD-quinone filtration rate, restoration of nearly a mile of Snoqualmie River riverbank in 2024, and record volunteer engagement of 1,400+ in 2025.
Stewardship Partners firmographics
Firmographics- Name
- Stewardship Partners
- Legal name
- Stewardship Partners
- Website
- https://stewardshippartners.org
- Company type
- Private
- Founded year
- 1999
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Stewardship Partners is a Seattle-based nonprofit, founded in 1999, that engages Puget Sound communities as caretakers of land and water through habitat restoration, Salmon-Safe farm certification, urban stormwater biofiltration (Adopt-a-Downspout), and green infrastructure programs for farmers, corporate sponsors, homeowners, schools, and municipal governments.
- Ownership category
- akta.pro rank
Stewardship Partners industry classification
Industry- Product category
- Environmental Stewardship and Conservation Services
- NAICS
- Environment, Conservation and Wildlife Organizations (813312)
- SIC
- Agricultural Services (700)
- akta.pro primary industry
- Marine & Freshwater Conservation (BPAGAGAE)
- akta.pro secondary industries
- Water Resources & Watershed Protection (BPAGAGAK), Oceans, Coastal & Marine Resource Management (BPADALAI), Wetland, Riparian & Buffer Services (within forest landscapes) (AFAMAMAI), Riparian & Watershed Reforestation (Streambank Stabilization) (AFAMACAK)
Keywords
Where Stewardship Partners is headquartered
LocationHeadquarters
- HQ city
- Seattle, WA
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Stewardship Partners business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Supply Chain, Others
Revenue model
- Donations and Grants: Individual donations and institutional grants from foundations and government agencies form the primary revenue stream. The organization relies heavily on public funding and philanthropic support.
- Corporate Sponsorships: Adopt-a-Buffer and Adopt-a-Downspout sponsorships from businesses and corporations. Sponsors fund restoration sites (approximately $10,000 per Adopt-a-Downspout site) or provide ongoing financial support for habitat buffers.
- Event Revenue: Feast on the Farm annual fundraiser generates significant revenue through ticket sales, sponsorships, live auctions, and raffles. Raised over $120,000 in 2025 and $115,000 in 2024.
- Summit Sponsorships: Annual Green Infrastructure Summit of the Salish Sea generates revenue through event sponsorships from corporate and organizational partners.
Go-to-market motion3 records
Distribution channels5 records
Marketing channels9 records
Stewardship Partners product offering
Product offeringCore offering
Stewardship Partners is a nonprofit that delivers people-based environmental stewardship programs across the Puget Sound region. It restores riparian habitat through the Snoqualmie Stewardship Program and Adopt-a-Buffer corporate partnerships, certifies farms and urban sites under Salmon-Safe Puget Sound, installs and maintains stormwater biofiltration Boxes of Rain through Adopt-a-Downspout, and runs residential rain garden campaigns (12,000 Rain Gardens, RainChangers). Revenue and engagement are generated through corporate sponsorships, donations, grants, and annual events including Feast on the Farm and the Green Infrastructure Summit of the Salish Sea.
Product overview
Stewardship Partners is a nonprofit organization (not a technology company) that creates people-based environmental solutions engaging Puget Sound communities as caretakers of land and water. The organization operates a portfolio of interconnected environmental programs rather than a unified software product. Core programs include: the Snoqualmie Stewardship Program (habitat restoration via Adopt-a-Buffer corporate partnerships), Salmon-Safe certification for farms and urban sites, Adopt-a-Downspout/Box of Rain (stormwater biofiltration boxes), Green Infrastructure Programs (including 12,000 Rain Gardens, RainChangers campaign, and City Habitats), and the annual Green Infrastructure Summit of the Salish Sea. Additionally, Feast on the Farm is the organization's signature annual fundraising event. These programs work together to filter polluted stormwater, restore salmon and wildlife habitat, support sustainable farming, and engage communities in environmental stewardship.
Differentiator
Problem solved
Functional benefit
Brands
- Adopt-a-Buffer: Program connecting businesses and community groups to restore fish and wildlife habitat on agricultural properties in the Snoqualmie Valley
- Adopt-a-Downspout
- Feast on the Farm
- Green Infrastructure Summit of the Salish Sea
- 12,000 Rain Gardens
- Salmon-Safe Puget Sound
- Snoqualmie Stewardship
- RainChangers
Quantifiable outcome
- 92% of 6PPD-quinone filtered from polluted stormwater by Boxes of Rain
- +6 more outcomes
Companies that use Stewardship Partners
Customer profileNamed customers11 records
Segments5 records
Ideal customer profiles5 records
Stewardship Partners technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature2 records
Stewardship Partners partnerships and signals
Strategic signalPartnerships
25 partnerships are on record, tiered core and minor.
- Washington State Department of Transportation (WSDOT)core10-year partnership agreement with WSDOT to scale the installation and maintenance of biofilter boxes (Adopt-a-Downspout) across the region. WSDOT is a key partner in addressing highway runoff pollution.
- The Nature ConservancycoreLong-standing partner in green infrastructure initiatives, stormwater management, and City Habitats campaign. Collaborates on Adopt-a-Downspout program addressing toxic tire chemicals.
- HerreracoreEnvironmental consulting firm partner in Adopt-a-Downspout program, providing technical expertise for stormwater management projects.
- King CountycoreMajor funder through King County Flood Control District Flood Reduction Funds for rain garden installations and Adopt-a-Downspout sites.
- Boeing CompanycoreMajor corporate sponsor and supporter; significant investments in City Habitats campaign; Kraken Green Night presenting partner; Boeing Company has supported Adopt-a-Buffer and employee volunteer programs.
- MicrosoftcoreCorporate Adopt-a-Buffer partner participating in employee volunteer restoration events at Snoqualmie Valley farms.
- Campbell GlobalminorPortland-based sustainable timber company and largest landowner in Snoqualmie Valley (100,000 acre Snoqualmie Forest); Adopt-a-Buffer sponsor at Full Circle Farm.
- Aspect ConsultingcoreEngineering firm providing pro-bono design, project management, and construction expertise for rain garden projects including Carnation Elementary School.
- Tableau (Salesforce)minorCorporate volunteer partner connected through Adopt-a-Buffer program; volunteers at Carnation Farms restoring fish and wildlife habitat.
- StarbuckscorePartners for Sustainability program supporter; corporate partner in environmental initiatives.
- Duke's Seafood & Chowder HouseminorLong-time partner hosting annual Sustainability Month with donations to Stewardship Partners; Adopt-a-Buffer volunteer events.
- Salmon-SafecorePartnership with Portland-based Salmon-Safe headquarters for co-implementation of Salmon-Safe certification in western Washington since 2004; Stewardship Partners leads agricultural and golf certifications.
- Snoqualmie TribecoreLong-standing partnership with Tribe's Environmental and Natural Resources program for habitat restoration, educational events, and water quality monitoring along Snoqualmie River.
- Greenprint PartnersminorPartnership for Adopt-a-Downspout webinar on 6PPD-q toxic chemical and salmon protection initiatives.
- Carnation FarmscoreKey farm partner hosting restoration crew headquarters; site of rain gardens and Earth Day volunteer events; partner since 2013 with over a decade of restoration work.
- Griffin Creek FarmcoreSalmon-Safe certified farm founded in 1996; original home of Feast on the Farm for 17 years; site of major restoration work since 2004 along Snoqualmie River.
- Growing VeteransminorVeterans organization committed to Salmon-Safe certification; uses sustainable agriculture for veteran reintegration.
- City Habitats NetworkcorePuget Sound-wide campaign started by Stewardship Partners with The Nature Conservancy, Washington Environmental Council, and City of Seattle; 100+ partners across sectors.
- Seattle Public UtilitiescorePartner in RainWise program and StormFest; General Manager and CEO Andrew Lee spoke at 2026 Green Infrastructure Summit.
- Northwest Fly AnglersminorConducts regular maintenance on Boxes of Rain at adopted site through Adopt-a-Downspout initiative.
- Touch WorldwideminorEvent sponsor and partner for Green Infrastructure Summit branding and event needs.
- PatagoniaminorLong-time corporate supporter and partner in sustainability initiatives.
- Grow It Forward RestorationminorNew local nonprofit partner offering volunteer opportunities for native tree seedling delivery to restoration projects.
- Dirt CorpsminorEnvironmental contractor for biofiltration box installation at The Grange in Duvall.
- MxM Landscape ArchitectureminorDesign partner for rain garden and biofiltration box projects including The Grange installation.
Scale indicators23 records
Recent moves7 records
Expansion highlights6 records
Stewardship Partners competitors and assessment
Company assessmentDirect peers
- EarthCorps: Seattle-based nonprofit focused on volunteer-driven ecological restoration in the Puget Sound region. Highly comparable as it mobilizes young adults and community volunteers for habitat restoration on similar Pacific Northwest watersheds.
- Salmon-Safe: Portland-based parent organization of the Salmon-Safe certification program that Stewardship Partners co-implements in western Washington. Directly comparable as the originating eco-label focused on watershed-protective land management certification across farms, vineyards, and urban sites.
- American Rivers: National nonprofit focused on river and watershed conservation, including wild salmon restoration. Comparable as a river-focused conservation organization, though operating at national scale with policy advocacy rather than regional volunteer restoration.
- Forterra: Pacific Northwest regional land conservation nonprofit that acquires and stewards working lands, including farms. Comparable mission in conserving PNW landscapes, though Forterra focuses more on land acquisition and less on volunteer-driven habitat restoration.
- Trout Unlimited: National coldwater fisheries conservation organization focused on salmonid habitat protection and restoration. Comparable as it prioritizes salmonid habitat similar to Stewardship Partners' salmon-protection work, with a stronger volunteer chapter network and national policy focus.
- Surfrider Foundation: National nonprofit focused on coastal water quality, beach access, and ocean protection. Comparable as a volunteer-chapter-driven environmental nonprofit addressing water pollution, including stormwater runoff, with similar grassroots engagement model.
- Puget Sound Partnership: Washington state agency leading the recovery of Puget Sound ecosystem. Directly comparable as a regional ecosystem restoration coordinating body in the same geography; Stewardship Partners is a key implementation partner on its Action Agenda.
- Washington Environmental Council: Statewide environmental policy and advocacy nonprofit in Washington. Co-founding partner of City Habitats alongside Stewardship Partners. Comparable in PNW environmental mission, with stronger focus on legislative advocacy versus on-the-ground restoration.
Regional players
- Sustainable Connections: Northwest Washington-based nonprofit advancing sustainable business and food systems. Comparable as a regional nonprofit connecting businesses to environmental and sustainability outcomes, though focused more on food/agriculture economy than direct watershed restoration.
Broad incumbents
- The Nature Conservancy (Washington): Global conservation nonprofit with a major Washington chapter actively partnering with Stewardship Partners on City Habitats, stormwater management, and 6PPD-quinone initiatives. Comparable as a much larger conservation organization working on overlapping watershed priorities across a wider portfolio.
Market position
Strengths5 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
Stewardship Partners social profiles
Digital presenceStewardship Partners financial estimates
Financial estimateRevenue estimate
Valuation estimate
Stewardship Partners leadership team
Management profileNumber of profiles
Profiles6 records
Stewardship Partners funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Stewardship Partners M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Stewardship Partners
What does Stewardship Partners do?
Stewardship Partners is a nonprofit that delivers people-based environmental stewardship programs across the Puget Sound region. It restores riparian habitat through the Snoqualmie Stewardship Program and Adopt-a-Buffer corporate partnerships, certifies farms and urban sites under Salmon-Safe Puget Sound, installs and maintains stormwater biofiltration Boxes of Rain through Adopt-a-Downspout, and runs residential rain garden campaigns (12,000 Rain Gardens, RainChangers). Revenue and engagement are generated through corporate sponsorships, donations, grants, and annual events including Feast on the Farm and the Green Infrastructure Summit of the Salish Sea.
Is Stewardship Partners a public or private company?
Stewardship Partners is a private company. It is classified as nonprofit foundation owned and is currently operating.
When was Stewardship Partners founded?
Stewardship Partners was founded in 1999. It employs 11 to 50 people.
Where is Stewardship Partners based?
Stewardship Partners is headquartered in Seattle, WA, United States, in the North America region.
How does Stewardship Partners make money?
Four revenue lines are on record. Donations and Grants are the primary driver. The others are corporate Sponsorships, event Revenue and summit Sponsorships.
Who are Stewardship Partners's main competitors?
Direct peers on record are EarthCorps, Salmon-Safe, American Rivers, Forterra, Trout Unlimited, Surfrider Foundation, Puget Sound Partnership and Washington Environmental Council. Sustainable Connections is listed as a regional player. The Nature Conservancy (Washington) is listed as a broad incumbent.
Does Stewardship Partners have an API?
No public API is recorded for Stewardship Partners.
What industry is Stewardship Partners in?
Stewardship Partners's product category is Environmental Stewardship and Conservation Services. Its primary akta.pro industry code is BPAGAGAE, Marine & Freshwater Conservation, with a secondary code of BPAGAGAK, Water Resources & Watershed Protection. Its NAICS code is 813312 and its SIC code is 700.