Whole House Water Filtration in Telluride, CO

In 2024, Telluride's total haloacetic acids averaged 30.94 parts per billion (individual results from 6.2 to 90.8) against a 60 ppb limit that applies to the running average, and total trihalomethanes averaged 22.22 ppb against an 80 ppb limit. Sodium was low at 3.07 parts per million, and nitrate was 0.15 ppm. The lead 90th percentile was 1 ppb and copper 0.19 ppm, both well under action levels. One local detail stands out. The town notes that water from Cornet Creek, used mainly in summer, runs partly through a titanium oxide filter that removes arsenic and is blended with Mill Creek and Stillwell water to land at about half the state arsenic limit, roughly 5 parts per billion. The source water assessment also lists existing and abandoned mine sites in the watershed among potential contamination sources. The town handles all of that before the water reaches you. What we add is a look at your own tap.

Telluride doesn't add fluoride to its water, according to the town. If you're comparing systems, that's one less thing to weigh, since reverse osmosis would otherwise remove most of it. In August 2025 the town limited outdoor watering while the Pandora plant was down for scheduled maintenance, leaving Mill Creek as the main plant with Stillwell as backup. Source and plant changes like that are normal, and they're one reason people in mountain towns like a whole-house filter that keeps taste consistent. If your home is up a valley on its own well, you're the only one testing it, so start with ours.