Data and Tools
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Vadose Zone Leaching (VLEACH)
VLEACH is a one-dimensional, finite difference model for making preliminary assessments of the effects on groundwater from the leaching of volatile, sorbed contaminants through the vadose zone.
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Wellhead Protection Area (WHPA) Model
WHPA is a semi-analytical groundwater flow simulation program used for delineating capture zones in a wellhead protection area.
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Categorical State Grant Programs Covered Under GPI 11-03: State Grant Workplans and Progress Reports
list of categorical state programs is subject to the requirements of Grants Policy Issuance (GPI) 11-03: State Grant Workplans and Progress Reports
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Addressing Emerging Contaminants in Wastewater Treatment Systems Webinar Archive
This EPA Tools & Resources webinar provides overview of work to develop a framework of wastewater treatment processes, focusing on removal rates of certain emerging contaminants, as well as associated life cycle costs and environmental impacts.
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Chemical and Products Database (CPDat)
CPCat (Chemical and Product Categories) is a database containing information mapping more than 43,000 chemicals to a set of terms categorizing their usage or function.
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What is the Enhancing State and Tribal Programs Initiative?
Information about state and tribal wetlands programs.
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Hydrocarbon Spill Screening Model (HSSM)
The model is intended to address the problem of LNAPL flow and transport from the ground surface to a water table aquifer.
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BIOSCREEN, Natural Attenuation Decision Support System
The model is designed to simulate biodegradation by both aerobic and anaerobic reactions.
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BIOPLUME III
BIOPLUME III is a two-dimensional finite difference model for simulating the natural attenuation of organic contaminants in groundwater due to the processes of advection, dispersion, sorption, and biodegradation.
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Remediation Evaluation Model for Fuel hydrocarbons (REMFuel)
This model simulates the transient effects of groundwater source and plume remediation for fuel hydrocarbons.
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Three-Dimensional Subsurface Flow, Fate and Transport of Microbes and Chemicals (3DFATMIC) Model
This model simulates subsurface flow, fate and transport of contaminants that are undergoing chemical or biological transformations. The model is applicable to transient conditions in both saturated and unsaturated zones.
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Data Governance
EPA has a data governance body that improves data management practices and support the implantation of the Evidence Act.
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Data from the National Aquatic Resource Surveys
The following data are available for download as text (.txt) files. Each .txt data file has a companion metadata file (.txt) that lists the field labels and descriptions for each variable.
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Frequent Questions about the Enhancing State and Tribal Program Initiative
Frequently asked questions for ESTP
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AQS Use of PM2.5 FEMS and ARMs in SLAMS Networks
AQS Use of PM2.5 FEMS and ARMs in SLAMS Networks
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Registration Letters for Fuel Programs
List of registered transportation fuel and fuel additives
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Virtual Beach 3.0.7 User Guide
Virtual Beach version 3 (VB3) is a decision support tool that constructs site-specific statistical models to predict fecal indicator bacteria (FIB) concentrations at recreational beaches.
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Tools for Source Water Protection Webcast
Learn more about tools for source water protection during our March 21st webcast.
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Summary Table EPA's Response to State and Tribe Recommendations - 2015 Ozone Designations
Table sumarizind 120-day letters
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Smart Growth in Your Community
Map of EPA smart growth project locations and text version.