Data and Tools

Analytical Methods for PFAS in Environmental Media

his presentation provides a summary and update on EPA analytical methods for PFAS in drinking, ground, surface and wastewaters in addition to solid samples such as soils, sediments, biosolids and tissues.

Overview of EPA PFAS R&D: Recent Accomplishments and Near-term Objectives

This presentation provides an overview of the different lines of R&D that EPA is conducting to address gaps and generate scientific information to enable decision makers to take action on PFAS.

Proctor Creek Watershed Story Map Webinar Archive

This EPA Tools & Resources webinar provides an overview of Story Maps and how they can be used to, featuring the Proctor Creek Watershed Story Map as an example.

Visualizing Ecosystem Land Management Assets (VELMA) Training Webinar Archive

This training webinar provides an overview of Visualizing Ecosystem Land Management Assets (VELMA), a spatially explicit ecohydrological watershed model planners use to visualize the effects of different scenarios.

PFAS Disposal and Destruction Research

The presentation provides an update on disposal and destruction research for PFAS, which have many and varied pathways into waste streams.

Frequent Questions

AQS Tips and FAQs used to resolve AQS issues

AQS Memos - Monitoring and Policy

AQS Monitoring and Policy

What do I do when I receive the error "Sample duration cannot change within a calendar year"?

When the need to change sample duration at a monitor arises a user should create a new POC with the new sample duration. By adding a new POC and this will allow for better understanding of what is going on at the site during any analysis. EPA utilizes the POC…

Last published: April 7, 2026

Manufacturer How-To Guide

This page is intended to help small or medium-sized manufacturers navigate the E3 assessment process.

E3 Supply Chain How-To Guide

Key steps for large manufacturers to initiate an E3 project for their supply chain, including resources for recruiting suppliers and recognizing supplier achievements.

Service Line Replacement Plan

Lead Service Line Inventory Template - This spreadsheet template may be used by public water systems in Wyoming and on EPA R8 Tribal Lands for service line inventories.

Bioaccumulation and Aquatic System Simulator (BASS)

On Bioaccumulation and Aquatic System Simulator (BASS), a model that simulates the population and bioaccumulation dynamics of age-structured fish communities.

WhAEM2000 BBM Files - Elm River, South Dakota

WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Elm River Quadrangle, South Dakota. Files serve as geographic basis for groundwater modeling.

WhAEM2000 BBM Files - Sioux Falls, South Dakota

WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Sioux Falls Quadrangle, South Dakota. Files serve as geographic basis for groundwater modeling.

United States Meteorological Data: Daily and Hourly files to Support Predictive Modeling

The resulting hourly and daily weather parameters provide a unified dataset for use in coordinated modeling.

Meteorological Data

30 year meteorological data files taken at 237 weather stations located throughout the United States for a period extending from 1961 to 1990.

AQUATOX Release 3.2 Fact Sheet

AQUATOX Release 3.2 was designed to extend the existing AQUATOX estuarine version to include improved capabilities for situations encountered in the nearshore marine environment. Several changes were required to model food webs in the marine environment.