Data and Tools
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Frequent Questions
AQS Tips and FAQs used to resolve AQS issues
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AQS Memos - Monitoring and Policy
AQS Monitoring and Policy
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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…
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Manufacturer How-To Guide
This page is intended to help small or medium-sized manufacturers navigate the E3 assessment process.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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AQUATOX 3.1 Fact Sheet
AQUATOX Release 3.1 includes numerous enhancements designed to improve model performance, more closely match data requirements with generally available data, improve data manipulation and analysis, and increase user friendliness.
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Contact HMS Helpdesk
Hydrologic Micro Services (HMS) request form. HMS Helpdesk
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EPA Pacific Southwest (Region 9) RTOC Meeting Materials
Collection of historic and upcoming meeting materials from Region 9 Regional Tribal Operations Committee (RTOC) meetings.
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Unacceptable and Acceptable Substitutes Tables
Landing page for substitute tables.
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Redevelopment at Federal Facilities
Reusing Federal Facility sites makes a visible difference in communities – enabling job opportunities, strengthening local economies and providing priority services.
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Modified Total Direct Cost (MTDC) Base Tool
EPA has provided a Modified Total Direct Cost (MTDC) Base Tool which breaks down cost categories and their allowability. Topics within this tool include but are not limited to supplies, travel, fringe benefits, equipment, and construction.
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Allowance Allocation Methodology for 2022
This page describes the steps EPA took to calculate each entity receiving allowances for calendar year 2022. The list of current allowance holders is available on the Issuing Allowance Allocations web page.
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Phasedown of Hydrofluorocarbons (HFCs): Issuing Allowance Allocations for 2022
The American Innovation and Manufacturing (AIM) Act was enacted by Congress on December 27, 2020. The AIM Act directs the U.S. Environmental Protection Agency (EPA) to address the environmental impact of HFCs.