MT. DIABLO UNIFIED SCHOOL DISTRICT: Single Audit Reports and Findings
MT. DIABLO UNIFIED SCHOOL DISTRICT filed 10 single audits between 2016 and 2025; the most recently observed auditor is NIGRO & NIGRO, PC (2025), and the 2025 report lists 1 finding, including 1 material weakness. Data as of 2026-11-06.
Data as of Nov 6, 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; MT. DIABLO UNIFIED SCHOOL DISTRICT is recorded in CONCORD, California under EIN 680091157, and the Clearinghouse records it as a local government. Each report opens on the Clearinghouse itself; how to search the Federal Audit Clearinghouse explains the rest of the reporting package.
| Audit year | Fiscal year end | Federal expended | Threshold applied | Auditor observed | Findings | MW / SD | FAC report |
|---|---|---|---|---|---|---|---|
| 2025 | 2025-06-30 | $32,035,965 | $750,000 | NIGRO & NIGRO, PC | 1 | MW / SD | 2025-06-GSAFAC-0000393518 |
| 2024 | 2024-06-30 | $59,421,559 | $750,000 | NIGRO & NIGRO, PC | 1 | MW / SD | 2024-06-GSAFAC-0000346647 |
| 2023 | 2023-06-30 | $45,046,528 | $750,000 | NIGRO & NIGRO, PC | 0 | MW | 2023-06-GSAFAC-0000013922 |
| 2022 | 2022-06-30 | $52,182,431 | $750,000 | CROWE LLP | 0 | — | 2022-06-CENSUS-0000133615 |
| 2021 | 2021-06-30 | $49,440,475 | $750,000 | CROWE LLP | 0 | — | 2021-06-CENSUS-0000133615 |
| 2020 | 2020-06-30 | $23,066,986 | $750,000 | CROWE LLP | 0 | — | 2020-06-CENSUS-0000133615 |
| 2019 | 2019-06-30 | $26,162,053 | $750,000 | CROWE LLP | 0 | — | 2019-06-CENSUS-0000133615 |
| 2018 | 2018-06-30 | $26,612,987 | $750,000 | CROWE LLP | 0 | — | 2018-06-CENSUS-0000133615 |
| 2017 | 2017-06-30 | $27,285,970 | $750,000 | NIGRO & NIGRO, PC | 0 | SD | 2017-06-CENSUS-0000133615 |
| 2016 | 2016-06-30 | $28,724,914 | $750,000 | NIGRO & NIGRO, PC | 1 | — | 2016-06-CENSUS-0000133615 |
When is the next single audit due?
If MT. DIABLO UNIFIED SCHOOL DISTRICT is again required to have a single audit for the fiscal year ending Jun 30, 2026, the reporting package is due to the Federal Audit Clearinghouse by Mar 30, 2027 at the latest.
Whether an audit is required depends on federal awards expended in that year (the single audit threshold). The rule, 2 CFR 200.512(a): the reporting package is due within 30 calendar days after the auditee receives the auditor's report or nine months after the end of the audit period, whichever is earlier; the date above is the nine-month date, moved to Monday when it falls on a weekend. Last verified: 2026-11-15.
Which federal programs did this organization report?
From the most recent accepted report, as listed on its schedule of expenditures of federal awards (SEFA). "Major" is the designation the auditor made under 2 CFR 200.518, not ours.
| ALN | Program | Expended | Major |
|---|---|---|---|
| 84.027 | SPECIAL EDUCATION GRANTS TO STATES | $7,641,288 | Yes |
| 10.555 | NATIONAL SCHOOL LUNCH PROGRAM | $6,139,573 | No |
| 84.010 | TITLE I GRANTS TO LOCAL EDUCATIONAL AGENCIES | $5,890,222 | Yes |
| 10.558 | CHILD AND ADULT CARE FOOD PROGRAM | $1,798,870 | No |
| 10.553 | SCHOOL BREAKFAST PROGRAM | $1,361,124 | No |
| 84.367 | SUPPORTING EFFECTIVE INSTRUCTION STATE GRANTS (FORMERLY IMPROVING TEACHER QUALITY STATE GRANTS) | $1,110,998 | Yes |
| 10.553 | SCHOOL BREAKFAST PROGRAM | $1,068,261 | No |
| 84.424 | STUDENT SUPPORT AND ACADEMIC ENRICHMENT PROGRAM | $996,293 | Yes |
| 10.555 | NATIONAL SCHOOL LUNCH PROGRAM | $972,815 | No |
| 84.010 | TITLE I GRANTS TO LOCAL EDUCATIONAL AGENCIES | $877,129 | Yes |
| 84.365 | ENGLISH LANGUAGE ACQUISITION STATE GRANTS | $812,219 | No |
| 10.555 | NATIONAL SCHOOL LUNCH PROGRAM | $465,765 | No |
| 17.259 | WIOA YOUTH ACTIVITIES | $360,590 | No |
| 93.558 | TEMPORARY ASSISTANCE FOR NEEDY FAMILIES | $350,120 | No |
| 84.027 | SPECIAL EDUCATION GRANTS TO STATES | $346,220 | Yes |
| 12.000 | JUNIOR RESERVE OFFICERS' TRAINING CORPS | $314,601 | No |
| 84.048 | CAREER AND TECHNICAL EDUCATION -- BASIC GRANTS TO STATES | $266,646 | No |
| 84.173 | SPECIAL EDUCATION PRESCHOOL GRANTS | $236,907 | Yes |
| 84.027 | SPECIAL EDUCATION GRANTS TO STATES | $191,847 | Yes |
| 84.002 | ADULT EDUCATION - BASIC GRANTS TO STATES | $187,121 | No |
| 84.181 | SPECIAL EDUCATION-GRANTS FOR INFANTS AND FAMILIES | $161,463 | No |
| 10.558 | CHILD AND ADULT CARE FOOD PROGRAM | $98,974 | No |
| 93.600 | HEAD START | $91,103 | No |
| 84.002 | ADULT EDUCATION - BASIC GRANTS TO STATES | $87,681 | No |
| 84.002 | ADULT EDUCATION - BASIC GRANTS TO STATES | $80,675 | No |
What findings did the auditor report?
The reference is the auditor’s; the requirement is the Compliance Supplement category the auditor selected. The finding text itself is not reproduced here; the FAC report linked above carries it in full. What the two severity levels mean: material weakness vs significant deficiency.
| Reference | Requirement | Severity | Repeat |
|---|---|---|---|
| 2025-003 | Special tests and provisions (N) | Significant deficiency | No |
Read next
- CPA firms that audit California nonprofits
- California single audit statistics
- California nonprofit audit requirements
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 MT. DIABLO UNIFIED SCHOOL DISTRICT 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. “MT. Diablo Unified School District, California Single Audits.” https://getauditradar.com/single-audits/ca/mt-diablo-unified-school-district-680091157/. Data as of 2026-11-06.