Is Longmont Tap Water Safe To Drink?
Yes! The tap water is safe to drink.
Yes. Tap water in Longmont, Colorado, is generally safe to drink and is treated and monitored under U.S. Environmental Protection Agency and Colorado health standards. The city publishes annual water quality reports showing testing results and compliance with regulatory requirements.
Water quality can vary in private wells, which are not managed by the city and require owner testing. Follow any temporary boil-water notice issued by Longmont or local health officials.
Last checked: 2026-10-16
Source of Water in Longmont, United States
Longmont’s tap water comes primarily from surface water in the St. Vrain Creek watershed and the Colorado-Big Thompson Project. The city also uses water stored in local reservoirs, including Ralph Price Reservoir.
The water is treated at Longmont’s water treatment facilities before entering the municipal distribution system. Treatment removes sediment, microorganisms, and other contaminants to meet Colorado and federal drinking water standards.
Longmont Drinking Fountains
Public drinking fountains in Longmont are generally safe to use because they are supplied by regulated municipal drinking water that meets federal and Colorado health standards. Fountains that are operating and properly maintained should provide water suitable for drinking.
Do not use a fountain marked out of service or one with visible damage, heavy dirt, or stagnant water. Let the water run briefly before drinking, especially if the fountain has not been used recently.
Drinking Water Map
Here is a map showing all the locations of drinking water spots in Longmont. You can click on each water drop to open the spot directly in Google Maps for directions. For easy access on the go, download our iOS app to find water fountains nearby.
Nearby Places
About the Author
Hi, I'm Emily Hartman, a researcher and water quality specialist with a background in public health.
I've spent the last few years studying how everyday water systems impact our health, and I'm passionate about making that information clear and useful for everyone.
Safe, clean tap water isn't just my job, it's something I truly care about.