Science & Technology

State and Tribal Wetland Program Plans

Information about Wetland Program Plans (WPPs) developed and implemented by state agencies and tribes.

Diving Case Studies

Summaries of EPA scientific diving investigations.

Atlanta Journal Constitution op-ed by Regional Administrator McOmber

McOmber Delivers Earth Day Message: Spend Time Outdoors, Enjoy the Sense of Place our Green Spaces Provide

Release Date: April 22, 2026

NDWAC 2015 Recommendations to the Administrator for the Long Term Revisions to the Lead and Copper Rule (LCR) and Past Meeting Summaries

The NDWAC Lead and Copper Rule Working Group was formed to provide advice to EPA in considering Long-Term Revisions to the Lead and Copper Rule.

Fact Sheet: First Six-Year Review of Drinking Water Standards

This document is a fact sheet about the 2003 review of existing drinking water standards

Support Documents for EPA’s First Review of Existing Drinking Water Standards

The support documents for the Six-Year Review 1 of existing National Primary Drinking Water Standards contain extensive information.

Initial Review for Existing Drinking Water Standards

Learn about the parts of EPA's initial review to identify contaminants in drinking water

Evaluating Implementation Issues for Six-Year Review of Drinking Water Standards

Learn about the criteria EPA considers when evaluating implementation issues for drinking water standards

Reviewing Treatment Methods for Six-Year Review of Drinking Water Standards

Learn about EPA's review of recommendations for best available technologies for drinking water treatments processes.

Fact Sheet: Second Six-Year Review of Drinking Water Standards

This document is a fact sheet about the 2010 second six-year review of existing drinking water standards.

Health Effects Review for Existing Drinking Water Standards

Learn about how new health effects assessments for drinking water contaminants are reviewed to determine if changes should be made to the current regulations

Six-Year Review 2 Contaminant Occurrence Data (1998-2005)

In March 2010, EPA announced the review results for the Agency’s second Six-Year Review. EPA analyzed occurrence data for the Six-Year Review 2 for 69 regulated contaminants, using data provided by 47 states or primacy agencies.

Six-Year Review 2 of Drinking Water Standards

Read the summary of EPA's Six-Year Review 2 of existing drinking water standards and learn about the four regulatory revision candidates

Six-Year Review 1 of Drinking Water Standards

Read the summary of EPA's Six-Year Review 1 of existing drinking water standards and its recommendations for revision

Supplemental Data for Six-Year Review 3

These following supplemental data sources were referred to in the technical support documents for the Six-Year Review 3.

EPA Unmanned Aircraft Systems (UAS) Program

The goal of the EPA UAS program is to create a framework through which EPA Regions, Program offices and grant recipients can take advantage of UAS technology to protect human health and the environment.

Integrated Water Analysis Tools

Integrated water analysis tools offer a wide spectrum of valuable information into a single interface. A few of these tools are applications that are geared for the public.

Fact Sheet: Watershed Boundaries for the 2002 Impaired Waters Baseline National Geospatial Dataset

Request for Correction and Reconsideration

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