 Image Number K8697-1 |
Technician Andrew Pond uses an iron oxide test strip to measure the amount of phosphorus present in a runoff sample.
Photo by Scott Bauer.
An official website of the United States government
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.