Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Hydrologic Modeling Community of Practice

Data Provisioning and Modeling Tools

The following products were developed by the U.S. Environmental Protection Agency in conjunction with other government, academic, and commercial institutions. To find out more about a particular product, click on a hyper-linked name in the table below. The products listed are available for download and are subject to the distribution and support policy.

Available Products
Product Name Operating System Key Words Supported by ORD?
WhAEM and GFLOW Binary Base Maps Windows 7,8,10 groundwater hydrology, model, wellhead protection, capture zones Yes
CTS Web based Chemical transformation simulator, web-based, environmental pathways, biological transformation, physiochemical properties No
CYAN Web based Cyanobacteria assessment network, cyanobacteria blooms, lakes and reservoirs, water quality No
HMS Web Services hydro-informatics, hydrologic micro services, environmental modeling, water quality data provisioning web services, modeling components, precipitation, air temperature, solar radiation, soil moisture, evapotranspiration, surface and subsurface flow, runoff. No
Meteorological Data Win 98, NT, 2000, XP meteorological, data, model, precipitation, evaporation, temperature, wind, radiation, humidity, atmosphere No
OnSite On-line Site Assessment Tool Web Enabled assessment, gradient, retardation factor, effective solubility, plume diving, borehole concentration averaging, transport models, henry's constants, unit conversions No
PEST Win 98, NT, 2000, XP model, independent, parameter, estimation No
Pisces Web based Piscine stream community estimation system, fish assemblage, huc-based, native species, non-native species, freshwater fish, species rarity, stream size preference, occurrence envelopes, water quality metrics No
WATERSHEDSS Win 98, NT, 2000, XP water, soil, hydrology, decision, education, agriculture, watershed, NPS, pollution, Internet No

Hydrologic Modeling Community of Practice

  • Modeling Products
  • Groundwater Models
  • Surface Water Models
  • Food Chain Models
  • Multimedia Models
  • Data Provisioning and Modeling Tools
  • Information Sources
    • About This Website
    • Frequent Questions
    • Related Links
    • Distribution and Support Policy
Contact Us About Community of Practice
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 15, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.