TELLURIDE, Colo. — It supplies the town of Telluride with drinking water, but the sheriff’s office says a group of homeless men, most of whom deputies say are often highly intoxicated, are using it as their personal swimming hole.

The San Miguel County Sheriff’s Office said in a tweet Tuesday that the Mill Creek water treatment facility has been targeted by the group of homeless campers seeking to take a dip in the facility’s pond on several occasions.

Deputies are investigating a group of homeless men who are allegedly trespassing into the Mill Creek water treatment facility and swimming in the pond that feeds Telluride’s water supply. Although the water is treated before it reaches the public, there is a reason there's a pic.twitter.com/qKuL23uTJ5 — San Miguel Sheriff (@SheriffAlert) August 14, 2018

The sheriff’s office said although the water is treated before it reaches the public, the reoccurrence of the trespassing events into the fenced-off pond is of “great concern.”

The group is believed to be camping in the Mill Creek area and are “well known to law enforcement,” the tweet said.

the area's 30-day camping limit. One of the men is legally in possession of firearms, including an AR-15. If you see suspicious activity at the Mill Creek water treatment facility, please contact dispatch (970-729-1911). — San Miguel Sheriff (@SheriffAlert) August 14, 2018

The sheriff’s office said deputies and rangers with the Forest Service are investigating the group for violating the area’s 30-day camping limit.

The sheriff’s tweet said one of the men is legally in possession of firearms, including an AR-15.

The public is being asked to report any suspicious activity near or at the water treatment facility.