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

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

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Ocean and Coastal Acidification

Ocean and Coastal Acidification

Changes to the concentration of carbon dioxide in the atmosphere can lead to increased acidity of the ocean and coastal systems. This phenomenon, called ocean acidification, impacts marine life and the people who depend on them. In addition, land-based sources of pollution can contribute to localized acidification of coastal waters. Learn more about Ocean and Coastal Acidification.

Basic Information

An Introduction to Acidification

What You Can Do

Your Family Can Help
Your School Can Help

Causes and Effects

Effects on Ecosystems
Understanding the Science
Effects on Marine Life

What EPA is Doing

Learn What EPA is Doing