Interstate Commission on the Potomac River Basin: Single Audit Reports and Findings
Interstate Commission on the Potomac River Basin filed 10 single audits between 2016 and 2025; the most recently observed auditor is CLIFTONLARSONALLEN LLP (2025), and the 2025 report lists 1 finding. Data as of 2026-09-18.
Data as of Sep 18, 2026 · Source: Federal Audit Clearinghouse (public data)
Single audits by year
One row per audit year as the Federal Audit Clearinghouse accepted it. The auditor named is the one observed on that filing; Interstate Commission on the Potomac River Basin is recorded in ROCKVILLE, Maryland under EIN 536001427, and the Clearinghouse records it as a local government.
| Audit year | Fiscal year end | Federal expended | Threshold applied | Auditor observed | Findings | MW / SD | FAC report |
|---|---|---|---|---|---|---|---|
| 2025 | 2025-09-30 | $1,019,269 | $1,000,000 | CLIFTONLARSONALLEN LLP | 1 | SD | 2025-09-GSAFAC-0000416167 |
| 2024 | 2024-09-30 | $988,580 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2024-09-GSAFAC-0000369093 |
| 2023 | 2023-09-30 | $909,214 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2023-09-GSAFAC-0000043933 |
| 2022 | 2022-09-30 | $971,968 | $750,000 | CLIFTONLARSONALLEN LLP | 1 | SD | 2022-09-CENSUS-0000181626 |
| 2021 | 2021-09-30 | $953,471 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2021-09-CENSUS-0000181626 |
| 2020 | 2020-09-30 | $891,136 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2020-09-CENSUS-0000181626 |
| 2019 | 2019-09-30 | $830,335 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2019-09-CENSUS-0000181626 |
| 2018 | 2018-09-30 | $859,730 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2018-09-CENSUS-0000181626 |
| 2017 | 2017-09-30 | $814,598 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2017-09-CENSUS-0000181626 |
| 2016 | 2016-09-30 | $1,170,420 | $750,000 | CLIFTONLARSONALLEN LLP | 0 | — | 2016-09-CENSUS-0000181626 |
Which federal programs did this organization report?
From the most recent accepted report. "Major" is the designation the auditor made under 2 CFR 200.518, not ours.
| ALN | Program | Expended | Major |
|---|---|---|---|
| 66.419 | WATER POLLUTION CONTROL STATE, INTERSTATE, AND TRIBAL PROGRAM SUPPORT | $634,000 | Yes |
| 66.466 | GEOGRAPHIC PROGRAMS - CHESAPEAKE BAY PROGRAM | $293,789 | No |
| 66.454 | WATER QUALITY MANAGEMENT PLANNING | $57,316 | No |
| 66.468 | DRINKING WATER STATE REVOLVING FUND | $8,888 | No |
| 66.468 | DRINKING WATER STATE REVOLVING FUND | $8,888 | No |
| 66.468 | DRINKING WATER STATE REVOLVING FUND | $8,888 | No |
| 15.670 | ADAPTIVE SCIENCE | $7,500 | No |
What findings did the auditor report?
The reference and the requirement letter are the ones the auditor used. The finding text itself is not reproduced here; the FAC report linked above carries it in full.
| Reference | Requirement | Severity | Repeat |
|---|---|---|---|
| 2025-001 | I | Significant deficiency / Questioned costs | No |
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How we computed this
Every row comes from the Federal Audit Clearinghouse record named beside it, one report per audit year, with a resubmission superseding the filing it replaces. The auditor is the one named on that filing — it is not a statement about who audits Interstate Commission on the Potomac River Basin now. Form 990 figures come from the IRS e-filed return named by its object id. This page exists because the organization filed at least two single audits, or one with a finding.
Cite this page
AuditRadar. “Interstate Commission on the Potomac Riv Single Audits.” https://getauditradar.com/single-audits/md/interstate-commission-on-the-potomac-river-basin-536001427/. Data as of 2026-09-18.