MT DIABLO INTERPRETIVE ASSOC

2025 · Form 990 · revenue $394K · expenses $326K · assets $1.3M

EIN

23-7444529

Address

PO BOX 346, WALNUT CREEK, CA 94597-0346

Website

MDIA.ORG

NTEE code

N320

Subsection

501(c)(3)

Ruling year

1975

Cross-check

ProPublica Nonprofit Explorer

Mission

TO ASSIST WITH MAINTAINING AND INTERPRETING MOUNT DIABLO STATE PARK, AN ECOLOGICAL TREASURE OF THE SAN FRANCISCO BAY AREA.

Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).

People paid by the organization

None of the 39 people listed on these returns reported compensation from the organization. They are listed below.

Officers and directors, no compensation reported

39 people listed on the returns with $0 (or no amount) in every compensation column: current people first. Hours are as filed on the latest return each person appears on.

People by year

Highest-paid independent contractors

Who gave

Contributor names are not public for this form type.

Public charities filing Form 990 or 990-EZ report large donors on Schedule B, but the IRS withholds their names and addresses from public copies. Private foundations (990-PF) are different: their contributors are public.

Finances

Newest first. Each filing: its name on one row, its figures on the row beneath. Greyed filings are superseded by a later return for the same period and are left out everywhere else on this page.

Funders of this organization

7 grantors reported grants to this organization, $342,221 in all, tax years 2011 to 2024. Exact: the grantor wrote this organization's EIN. Fuzzy: the grantor wrote only a name (foundations' 990-PF has no EIN field), matched to the same or a near-identical name in the same state; the name as filed is shown. From the latest return for each grantor and year, so amended returns aren't counted twice. CSV

Similar organizations

Ranked without any AI: same NTEE code first, then the same NTEE group; then revenue within 2x, 5x or 10x; then the same state; then similar name and mission text. Same state only · More (100)

Who funds organizations like this

Grantors that funded the 100 most similar organizations. Ranked by total given to them. Foundations (990-PF) and donor-advised fund sponsors only. Same matching as Funders above (by EIN, or by name for foundations).

The full list · all similar organizations

Where the money went

Every expense line on each return, biggest first: Form 990 Part IX (with its program, management and fundraising columns), 990-EZ Part I, or 990-PF Part I. Event marks lines the organization itself describes as events. “Events” in each summary adds those lines, conferences and meetings, and the direct costs of fundraising events. Unusual is not the same as improper. Many of these patterns have ordinary explanations. Check the filing.