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
    • 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
    • Guidance
    • 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
    • Newsroom
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Nutrient Pollution

Data and Tools to Assist States, Tribes, & Territories

The U.S. Environmental Protection Agency has collected data, developed tools and supported the efforts of states, Tribes and territories to protect the nation’s water bodies from nutrient pollution and improve water quality. The tools and data not only help water professionals better understand the distribution and effects of nutrient pollution, they also facilitate modelling efforts geared toward reducing and managing the effects of nutrient pollution on human health and the environment.

Learn about the data and tools that can help you understand the distribution, movement, impacts of, and management options for, nutrients in surface and source waters (i.e., those used as drinking water sources):

  • Nutrient Data
  • Surface and Source Water Tools

Nutrient Pollution

  • Basic Information
    • Sources and Solutions
      • Agriculture
      • Stormwater
      • Wastewater
      • Fossil Fuels
      • In and Around the Home
    • The Effects
      • Human Health
      • Environmental
      • Economic
    • Where it Occurs
      • Lakes and Rivers
      • Coasts and Bays
      • Ground Water and Drinking Water
      • Air
  • What You Can Do
    • In Your Home
    • In Your Yard
    • In Your Community
    • In Your Classroom
  • The EPA’s Efforts to Reduce Nutrient Pollution
    • 2022 Nutrient Reduction Memorandum
    • Ongoing Efforts
    • Previously Issued Policies and Documents
  • Data and Tools to Assist States, Tribes, & Territories
    • Nutrient Data
      • Nutrient Indicators Dataset
    • Surface and Source Water Tools
  • Learn about Numeric Nutrient Criteria
    • Programmatic Information
    • Technical Support for Criteria Development
      • N-STEPS Program
    • State Progress Toward Adopting Numeric Nutrient Criteria for Nitrogen and Phosphorus
  • Research, Reports, & Other Resources
    • Research and Reports
    • Technical Resources
Contact Us about Nutrient Pollution
Contact Us about Nutrient Pollution to ask a question, provide feedback, or report a problem.
Last updated on October 22, 2026
  • 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 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.