NEW ENGLAND INTERSTATE WATER POLLUTION CONTROL COMMISSION: Single Audit Reports and Findings
NEW ENGLAND INTERSTATE WATER POLLUTION CONTROL COMMISSION filed 10 single audits between 2016 and 2025; the most recently observed auditor is GRASSI & CO., CPAS, P.C. (2025), and the 2025 report lists 1 finding. 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; NEW ENGLAND INTERSTATE WATER POLLUTION CONTROL COMMISSION is recorded in LOWELL, Massachusetts under EIN 046004735, and the Clearinghouse records it as a nonprofit. 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 | 2025-09-30 | $16,109,467 | $1,000,000 | GRASSI & CO., CPAS, P.C. | 1 | SD | 2025-09-GSAFAC-0000418673 |
| 2024 | 2024-09-30 | $13,992,219 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2024-09-GSAFAC-0000367749 |
| 2023 | 2023-09-30 | $11,431,022 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2023-09-GSAFAC-0000038090 |
| 2022 | 2022-09-30 | $9,721,974 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2022-09-CENSUS-0000005239 |
| 2021 | 2021-09-30 | $8,718,664 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2021-09-CENSUS-0000005239 |
| 2020 | 2020-09-30 | $8,329,427 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2020-09-CENSUS-0000005239 |
| 2019 | 2019-09-30 | $8,643,976 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2019-09-CENSUS-0000005239 |
| 2018 | 2018-09-30 | $9,912,626 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2018-09-CENSUS-0000005239 |
| 2017 | 2017-09-30 | $9,568,325 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2017-09-CENSUS-0000005239 |
| 2016 | 2016-09-30 | $8,438,642 | $750,000 | ANSTISS & CO., P.C. | 0 | — | 2016-09-CENSUS-0000005239 |
When is the next single audit due?
If NEW ENGLAND INTERSTATE WATER POLLUTION CONTROL COMMISSION is again required to have a single audit for the fiscal year ending Sep 30, 2026, the reporting package is due to the Federal Audit Clearinghouse by Jun 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 |
|---|---|---|---|
| 66.481 | GEOGRAPHIC PROGRAMS Â LAKE CHAMPLAIN BASIN PROGRAM | $10,813,248 | Yes |
| 66.437 | GEOGRAPHIC PROGRAMS Â LONG ISLAND SOUND PROGRAM | $1,764,175 | No |
| 66.419 | WATER POLLUTION CONTROL STATE, INTERSTATE, AND TRIBAL PROGRAM SUPPORT | $951,704 | No |
| 66.816 | HEADQUARTERS AND REGIONAL UNDERGROUND STORAGE TANKS PROGRAM | $654,067 | No |
| 11.420 | COASTAL ZONE MANAGEMENT ESTUARINE RESEARCH RESERVES | $586,519 | No |
| 15.939 | HERITAGE PARTNERSHIP | $449,179 | No |
| 66.446 | TECHNICAL ASSISTANCE FOR TREATMENT WORKS (CLEAN WATER ACT [CWA] SECTION 104(B)(8)) | $215,559 | No |
| 11.469 | CONGRESSIONALLY IDENTIFIED AWARDS AND PROJECTS | $179,399 | No |
| 66.444 | VOLUNTARY SCHOOL AND CHILD CARE LEAD TESTING AND REDUCTION GRANT PROGRAM (SDWA 1464(D)) | $120,786 | No |
| 66.436 | SURVEYS, STUDIES, INVESTIGATIONS, DEMONSTRATIONS, AND TRAINING GRANTS AND COOPERATIVE AGREEMENTS - SECTION 104(B)(3) OF THE CLEAN WATER ACT | $118,813 | No |
| 66.454 | WATER QUALITY MANAGEMENT PLANNING | $96,523 | No |
| 11.432 | NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION (NOAA) COOPERATIVE INSTITUTES | $78,869 | No |
| 66.129 | GEOGRAPHIC PROGRAMS - SOUTHEAST NEW ENGLAND COASTAL WATERSHED RESTORATION PROGRAM | $45,686 | No |
| 66.461 | REGIONAL WETLAND PROGRAM DEVELOPMENT GRANTS | $34,940 | 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 |
|---|---|---|---|
| 2025-001 | Reporting (L) | Significant deficiency | No |
Form 990 and IRS registration
Form 990 "accounting fees" (Part IX line 11c) cover all accounting services reported by the organization and are not the price of an audit engagement.
Where to find the return itself, and what our Form 990 data covers: Form 990 lookup.
- Most recent return
- 990 for 2025-09
- Total revenue
- $31,684,303
- Total assets
- $15,401,119
- Accounting fees (Part IX line 11c)
- $48,883
- Paid preparer
- GRASSI & CO CPA'S PC
- IRS object id
- 202601429349301505
- NTEE code
- C012
- Exempt under
- 501(c)(3)
- Ruling year
- 1981
- BMF release
- 2026-10-20
Read next
- CPA firms that audit Massachusetts nonprofits
- Massachusetts single audit statistics
- Massachusetts 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 NEW ENGLAND INTERSTATE WATER POLLUTION CONTROL COMMISSION 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. “New England Interstate Water Pollution Single Audits (MA).” https://getauditradar.com/single-audits/ma/new-england-interstate-water-pollution-control-commission-046004735/. Data as of 2026-11-06.