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Water Topics

Water

EPA supports efforts under the Clean Water Act and Safe Drinking Water Act to protect and restore our nation's waters and ensure that every American has access to clean, safe water.


EPA & You

  • Protect Source Water
  • Save Water with WaterSense
  • Protect Watersheds
  • Volunteer Water Quality Monitoring
  • Urban Water Renewal

Drinking water

Drinking Water

  • Drinking Water Basics
    • Lead in Drinking Water
  • Local Water Quality Reports
  • Private Wells
  • Source Water Protection
  • Drinking Water State Revolving Fund
water treatment

Wastewater 

  • Septic Systems
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  • Clean Water State Revolving Fund
marsh land

Wetlands, Oceans and Watersheds

  • Beaches
  • Coral Reefs
  • Healthy Watersheds Protection
  • How's My Waterway?
  • Watershed Academy
  • Marine Protection Permitting
  • National Estuary Program
  • Ocean and Coastal Acidification
  • Trash-Free Waters
  • Vessels, Marinas and Ports
  • Wetlands
water research

Water Research

  • Water Topics, Funding, and Training
  • Coastal Water Data
  • Water Data and Tools
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  • Water Research 
  • Methods and Models
    • EPANET
  • Microplastics Research
estuary

Climate Resilience

  • Climate Change in the Water Sector
  • Climate Ready Estuaries
  • Utility Resilience tools 
  • Sustainable Water Infrastructure
  • Green Stormwater Management
Dam

Infrastructure Finance

  • Funding and Assistance Resources 
  • Coordinate Funding
  • Water Finance Center
  • Water Technical Assistance 
  • Water Infrastructure Finance and Innovation Act (WIFIA)
Storm drain

Pollution Prevention and Monitoring

  • National Pollutant Discharge Elimination System (NPDES)
    • Resources for Permit Writers
    • Stormwater Pollution
  • Nutrient Pollution
  • Per- and Polyfluoroalkyl Substances (PFAS)
  • Polluted Runoff: Nonpoint Source (NPS) Pollution

Related Information

About Water at EPA

  • Office of Water
  • Frequent Questions about Water

Laws and Regulations

  • Clean Water Act
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  • Drinking Water Regulations: Maximum Contaminant Levels (MCLs)
  • Regulatory Information by Topic: Water

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Contact Us
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 19, 2025
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