Natural resource specialist Melissa May takes samples of water from the Animas River north of the New Mexico State line.
Natural resource specialist Melissa May takes samples of water from the Animas River north of the New Mexico State line.Durango Herald file

Registration is $45 before April 3 and $50 at the door the day of the event.

To register, call 247-1302 or visit www.swwcd.org.