Hudson Valley Stream Conservancy

aka Hudson Valley Stream Conservancy   |   Ossining, NY   |
GuideStar Charity Check

Hudson Valley Stream Conservancy

EIN: 02-0764100


To restore streams and their ecosystem services to their communities and beyond.

Ruling year info


Principal Officer

Dr. Gareth Hougham

Main address

53 old Albany Post Road

Ossining, NY 10562 USA

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Subject area info

Environmental justice

Rivers and lakes


Water pollution

Aquatic wildlife protection

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Population served info

Self-employed people

Retired people




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NTEE code info

Interdisciplinary Research (V30)

IRS subsection

501(c)(3) Public Charity

IRS filing requirement

This organization is required to file an IRS Form 990 or 990-EZ.

Tax forms


Programs and results

What we aim to solve

SOURCE: Self-reported by organization

Decades of neglect and misunderstanding have made it clear that our water resources are in need of attention. With special attention to the tributaries and geography of the Hudson River Valley watershed, there are significant problems associated with water quality and pollution; stream infrastructure and ecology (including aquatic and non-aquatic animal life); public understanding of the importance of clean waterways; and public access and enjoyment of water-rich resources like streams, ponds, and rivers.

Our programs

SOURCE: Self-reported by organization

What are the organization's current programs, how do they measure success, and who do the programs serve?

Sprout Brook Dam Removal

NY State funded design and permitting project for removal of the first dam up from the Hudson River tide. The purpose is to facilitate springtime migration of river herring (Alewife and Blueback Herring) upstream.

Population(s) Served

Where we work

Goals & Strategy

SOURCE: Self-reported by organization

Learn about the organization's key goals, strategies, capabilities, and progress.

Charting impact

Four powerful questions that require reflection about what really matters - results.

Hudson Valley Stream Conservancy (HVSC) is a tax exempt nonprofit that works in aquatic ecology, water-related infrastructure, environmental education and outreach. We’ve been around since 2006 and are supported by New York State and foundation grants. Our overriding goal is to protect and restore streams and rivers both for their ecological function and to help humans sustainably get the most out of interacting with nature, on both economic and recreation fronts.

We specialize in small community streams that have been long overlooked and work to bring them out of anonymity in their community. We do this by first researching the fish wildlife, the water quality, and the history of the streams and by then telling their stories using engaging interpretive signage, in-stream events and cleanups, and village fair demonstrations. We get to point out, for instance, that "No, your stream is not a lifeless sewer, but has nine documented species of fish!”.

HVSC works with peer organizations, municipalities, and other stakeholders on projects such as design and permitting for unneeded legacy dam removal, public education about local waterways, Hudson River public beach pre-permitting water quality studies, fish diversity and water quality studies of various streams, and design and permitting for deep water Hudson River piers. Deep water piers can accommodate tall ships like the Clearwater and the Freedom Ship Amistad, who can reinforce and multiply our complementary educational and recreational missions.

How we listen

SOURCE: Self-reported by organization

Seeking feedback from people served makes programs more responsive and effective. Here’s how this organization is listening.

done We demonstrated a willingness to learn more by reviewing resources about feedback practice.
done We shared information about our current feedback practices.
  • How is your organization using feedback from the people you serve?

    To identify and remedy poor client service experiences, To identify bright spots and enhance positive service experiences, To make fundamental changes to our programs and/or operations, To inform the development of new programs/projects, To identify where we are less inclusive or equitable across demographic groups, To strengthen relationships with the people we serve, To understand people's needs and how we can help them achieve their goals

  • Which of the following feedback practices does your organization routinely carry out?

    We take steps to get feedback from marginalized or under-represented people, We aim to collect feedback from as many people we serve as possible, We take steps to ensure people feel comfortable being honest with us, We look for patterns in feedback based on demographics (e.g., race, age, gender, etc.), We look for patterns in feedback based on people’s interactions with us (e.g., site, frequency of service, etc.), We engage the people who provide feedback in looking for ways we can improve in response, We act on the feedback we receive, We tell the people who gave us feedback how we acted on their feedback, We ask the people who gave us feedback how well they think we responded

  • What challenges does the organization face when collecting feedback?

    We don't have any major challenges to collecting feedback


Hudson Valley Stream Conservancy
Fiscal year: Jan 01 - Dec 31

Revenue vs. expenses:  breakdown

SOURCE: IRS Form 990 info
Note: When component data are not available, the graph displays the total Revenue and/or Expense values.

Financial data

SOURCE: IRS Form 990

Hudson Valley Stream Conservancy

Revenue & expenses

Fiscal Year: Jan 01 - Dec 31

SOURCE: IRS Form 990 info

Fiscal year ending: cloud_download Download Data

Hudson Valley Stream Conservancy

Balance sheet

Fiscal Year: Jan 01 - Dec 31

SOURCE: IRS Form 990 info

The balance sheet gives a snapshot of the financial health of an organization at a particular point in time. An organization's total assets should generally exceed its total liabilities, or it cannot survive long, but the types of assets and liabilities must also be considered. For instance, an organization's current assets (cash, receivables, securities, etc.) should be sufficient to cover its current liabilities (payables, deferred revenue, current year loan, and note payments). Otherwise, the organization may face solvency problems. On the other hand, an organization whose cash and equivalents greatly exceed its current liabilities might not be putting its money to best use.

Fiscal year ending: cloud_download Download Data


The people, governance practices, and partners that make the organization tick.

Form 1023/1024 is not available for this organization

Principal Officer

Dr. Gareth Hougham

Biography: Gareth Hougham is president of Hudson Valley Stream Conservancy (HVSC), a 501(c)(3) non-profit dedicated to aquatic ecology, water quality and public access. He is also an adjunct professor of Environmental Science at SUNY Purchase where he has a dedicated water quality laboratory. He received his Ph.D. in chemistry from Polytechnic University in Brooklyn (now NYU Tandon School of Engineering) and worked at the IBM, Thomas J. Watson Research Center for 30 years on advanced materials for high speed electronics. He has over 100 U.S. patents and 30 publications including a two-volume book on fluoropolymers. He is also a past member of the Town of Ossining Planning Board and Chairman for 2021-2022, a founding member of Environmental Leaders Learning Alliance (ELLA), and a member of the American Chemical Society, Society of Wetland Scientists, and the American Fisheries Society. He is a board member of The Hudson River Sloop Clearwater.

Hudson Valley Stream Conservancy

Officers, directors, trustees, and key employees

SOURCE: IRS Form 990

Show data for fiscal year
Compensation data
Download up to 5 most recent years of officer and director compensation data for this organization

There are no highest paid employees recorded for this organization.

Hudson Valley Stream Conservancy

Board of directors
as of 05/25/2023
SOURCE: Self-reported by organization
Board of directors data
Download the most recent year of board of directors data for this organization
Board chair

Gareth Hougham

Elizabeth O'Mara

George Kraemer

State University of New York, College at Purchase

Margaret Minnis

PACE University, Pleasantville, NY

John Waldman

CUNY Queens College

David Post

DVP Advisors, Inc.

Barbara Henninger

Gavin Hougham

Board leadership practices

SOURCE: Self-reported by organization

GuideStar worked with BoardSource, the national leader in nonprofit board leadership and governance, to create this section.

  • Board orientation and education
    Does the board conduct a formal orientation for new board members and require all board members to sign a written agreement regarding their roles, responsibilities, and expectations? No
  • CEO oversight
    Has the board conducted a formal, written assessment of the chief executive within the past year ? No
  • Ethics and transparency
    Have the board and senior staff reviewed the conflict-of-interest policy and completed and signed disclosure statements in the past year? Yes
  • Board composition
    Does the board ensure an inclusive board member recruitment process that results in diversity of thought and leadership? Yes
  • Board performance
    Has the board conducted a formal, written self-assessment of its performance within the past three years? No

Organizational demographics

SOURCE: Self-reported; last updated 5/25/2023

Who works and leads organizations that serve our diverse communities? Candid partnered with CHANGE Philanthropy on this demographic section.


The organization's leader identifies as:

Race & ethnicity
Gender identity
Male, Not transgender
Sexual orientation
Heterosexual or Straight
Disability status
Person without a disability

Race & ethnicity

Gender identity

Transgender Identity

Sexual orientation

No data