EIN 41-2222581501(c)(3) public charityApproved June 2007Donations tax deductible
From the latest return on file
At a glance
Figures come from the organization’s Form 990 for the fiscal year ending June 2025, as recorded by the IRS.
Revenue
$5,510,650
FY2025
Assets
$15,633,884
Year end
Required return
Form 990
Full return required from $200K of receipts
Fiscal year
July to June
Ends in June
Focus
Pollution abatement and control
NTEE C20, environment
Charity type
Publicly supported
170(b)(1)(A)(vi)
Compliance clock
What is due, and when
Computed from the fiscal year end and the return type. Federal dates are fixed by law. The state line is the general charitable solicitation rule of Virginia, read from the regulator’s own guidance; exemptions vary, and the regulator’s page is the authority.
Nov 16, 2026
Form 990 for FY2026
Fifteenth day of the fifth month after year end. November 15 falls on a Sunday, so the deadline moves to Monday.
Nov 15, 2027
Form 990 for FY2027
Fifteenth day of the fifth month after year end.
Annual
Virginia charitable solicitation registration
Charities that solicit in Virginia register with the state and renew each year, unless exempt. It is due by the 15th day of the fifth month after the fiscal year ends. An extension is available. For a fiscal year ending in June, that is November 15.
Exempt status is revoked after three consecutive years without a return. The latest return on file is FY2025.
Filing history
When each return reached the IRS
From IRS records of electronically filed returns. The IRS record date is the date in the IRS’s own record of each return. It is not a legal filing date, and extensions are not public.
Fiscal year
Form
IRS record date
Due date
Note
FY2025
Form 990
February 8, 2026
November 17, 2025
FY2024
Form 990
December 23, 2024
November 15, 2024
FY2023
Form 990
November 13, 2023
November 15, 2023
On or before the due date
FY2022
Form 990
February 21, 2023
November 15, 2022
Returns for fiscal years before 2021, and returns the IRS record cannot date, are not listed.
IRS status check
What the IRS lists say
Three IRS lists, read each month. This is a display of what they show, not a determination of status.
Exempt status
Listed as exempt
The IRS list of exempt organizations. As of October 13, 2026.
Deductible donations
Listed
The IRS list of organizations eligible to receive tax deductible contributions. Listed with code PC (public charity). As of October 13, 2026.
Automatic revocation
Not on the list
The IRS list of organizations whose exemption was revoked for not filing three years in a row. As of October 13, 2026.
Peers
Against Virginia environment organizations of similar size
24 public charities share this focus and state with revenue over $5M on a recent return. The shaded band is the middle half of the group.
$5M$15.7M$26.3M$37M$47.6M+
The Lamb Center $5.51MPeer median $11.9MMiddle half of peers
Revenue rank
10th percentile
Among the 24 peers
Assets held
About 2.8 years
Of annual revenue, from public figures
Age
About the typical age
Approved 2007; the median peer, 1996
Readiness
What public data cannot tell you
A 990 shows money in and money out. It cannot show whether programs, outcomes, funding and compliance live in one place, or how long a funder report takes to produce. The five pillars below are scored only by the organization itself.
Mission & Strategic Clarity
Can every program be traced to a stated outcome?
Unscored
Stakeholders & Positioning
Do funders see the same story the board sees?
Unscored
Programs & Program Design
Are participants, activities and budgets tracked per program?
Unscored
Evidence, Data & Storytelling
How long does the next funder report take to assemble?