Laws & Regulations

Arizona DEQ PSD Delegation Agreements

This delegation agreement is for Prevention Of Significant Deterioration (PSD) allows ADEQ to issue GHG and PM10 PSD permits using 40 CFR 52.21

Denver Water Variance Associated Documents

Denver Water’s request for a SDWA variance has been signed. Attached are the signed cover letter, order, appendix, and signed version of the FR notice.

Regional Fish Consumption Screening Levels (Spring 2021)

Regional Screening Level RSL generic table page provides the default RSLs for use by risk assessors in site screening for chemical contaminants for the assessment of human Health.

Energy and Environment Guide to Action 2015 Edition

Presents in-depth information about state policies and best practices used to meet energy, environmental, and economic objectives.

Detroit SO2 Federal Implementation Plan

EPA is proposing a Federal Implementation Plan (FIP) for attaining the 1-hour sulfur dioxide (SO2) primary national ambient air quality standard (NAAQS) for the Detroit SO2 nonattainment area.

Discover the History of the Clean Water Act

Explore an interactive StoryMap and learn about the history of the Clean Water Act.

Federal Register Citations - MATS

list of FR citations mats

How to Apply

State Authorization Rule Checklists 247 to 249 for Hazardous Waste Rulemakings Published Between July 2024 and June 2025

Rules, checklists, summaries and Federal Register Notice links related to State Program Advisory 42.

Delegations of New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) in the Pacific Northwest

Clean Air Act Title V program reviews conducted by EPA for delegated and approved permitting programs in Region 10 (Alaska, Idaho, Oregon, Washington.)

Transfer and Cross‐Collateralization of Clean Water State Revolving Funds and Drinking Water State Revolving Funds

Link containing Federal laws and Executive Orders, including cross-cutting federal authorities, apply to projects and activities receiving assistance under the Clean Water State Revolving Fund (CWSRF) program.

WIFTA Questions and Answers

WIFTA questions and answers

DWSRF Resources for Water Utilities

This page contains links and summaries of DWSRF resources.

Deviation from 40 CFR §35.3520(e)(2) for the Groundwater Source Development Project for Mores Creek Rim Ranches Water District, Idaho (2018)

req for a deviation from 40 CFR Part 35.3520(e)(2), which prohibits DWSRF financing of water rights. The deviation will allow the state of ID to use DWSRF funds for a water rights purchase, which would then allow the Mores Creek Rim Ranches Water District

Deviation from 40 CFR Part 35.3520(e)(2) for the Well Relocation Project for Oshkosh, Nebraska, and the North Douglas Regional Intertie Project for Carson City, Nevada (2018)

The deviation will allow the state of Nebraska to use DWSRF funds for a water transfer permit fee from the North Platte Natural Resource District, which would then allow the City of Oshkosh to withdraw water from new wells in the Blue Creek drainage basin.