# Water Pollution Control State, Interstate, and Tribal Program Support (66.419)

Source: https://welltoldgrants.com/programs/66-419-water-pollution-control-state-interstate-and-tribal-program/  
Publisher: Well Told Grants. Data: USAspending.gov and Grants.gov, updated November 7, 2026.

Water Pollution Control State, Interstate, and Tribal Program Support is run by Environmental Protection Agency. From fiscal 2021 to 2025 it awarded $332 million in 377 grants, about $879,368 per award.

## Objectives

To assist States (including territories and the District of Columbia), Indian Tribes qualified under CWA Section 518(e), and interstate agencies in establishing and maintaining adequate measures for prevention and control of surface and ground water pollution from both point and nonpoint sources. States and Tribes will continue to focus on fulfilling their basic responsibilities under the CWA Section 106 funded programs, such as: (1) implementing monitoring strategies and the statistically-valid surveys to determine water quality status and trends; (2) fostering a watershed approach, including total maximum daily loads (TMDLs) and watershed plans designed to meet water quality standards; (3) implementing National Pollutant Discharge Elimination System (NPDES) permitting programs; and 4) States and Tribes will continue adopting updated water quality standards that support designated uses and completing triennial reviews on time. States NPDES Programs will continue to: (1) ensure the integrity of the program; (2) achieve and measure environmental results; and (3) incorporate efficiencies in permitting program operations. States will also conduct source water protection actions to protect both ground water and surface waters used for drinking water. Tribes will continue to conduct watershed assessments and will maintain and improve their capacity to implement water quality programs through monitoring, assessments, planning, data management and standards development.

## Funding by fiscal year

| Year | Amount | Awards |
|---|---|---|
| 2021 | $71.1 million | 149 |
| 2022 | $68.9 million | 121 |
| 2023 | $71.2 million | 122 |
| 2024 | $66.1 million | 116 |
| 2025 | $54.2 million | 81 |

## Largest recipients

| Recipient | State | Amount |
|---|---|---|
| State of California Water Resources Control Board | California | $61.8 million |
| North Carolina Department of Environmental Quality | North Carolina | $31.9 million |
| Pennsylvania Department of Environmental Protection | Pennsylvania | $30.4 million |
| The State of Ohio Office of Budget and Management | Ohio | $26.7 million |
| Texas Commission on Environmental Quality | Texas | $16.5 million |
| Oklahoma Secretary of Energy and Environment | Oklahoma | $14.3 million |
| Hawaii Department of Health | Hawaii | $11.7 million |
| Arkansas Division of Environmental Quality | Arkansas | $11.3 million |
| West Virginia Department of Environmental Protection | West Virginia | $10.2 million |
| New Mexico Environment Department | New Mexico | $9.7 million |
| Ohio River Valley Water Sanitation Commission | Ohio | $7.8 million |
| State of Idaho Department of Environmental Quality | Idaho | $7.7 million |
| State of Delaware, Dnrec | Delaware | $7.6 million |
| New England Interstate Water Pollution Control Commission | Massachusetts | $6.5 million |
| Department of Energy and Environment | District of Columbia | $6.2 million |
| Department of Conservation and Natural Resources | Nevada | $5.1 million |
| Interstate Environmental Commission | New York | $3.7 million |
| Delaware River Basin Commission | New Jersey | $3.3 million |
| Interstate Commission on the Potomac River Basin | Maryland | $3.2 million |
| Susquehanna River Basin Commission | Pennsylvania | $2.8 million |