Tres Valles West, CO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Tres Valles West serves about 68 people through 30 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Huerfano County, Colorado. EPA system ID: CO0128726; phone on file: 719-846-2080. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 1.5 ppb from 1.5 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Tres Valles West is 1.5 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 1.5 ppb |
Where this result ranks
Of the 1,025 Colorado systems with a lead result, the median latest reading is 1 ppb; 2 are over 15 ppb right now and 71 have gone over at some point. Tres Valles West's reported as 0 (not detected) sits at the 3rd percentile in Colorado and the 6th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
9 other systems share Huerfano County; 3 of them have a higher latest lead result than Tres Valles West. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Walsenburg City Of | 3,230 | 18 ppb |
| La Veta Town Of | 850 | 0 (not detected) |
| Gardner Water And Sanitation Dist | 400 | 0 (not detected) |
| Cucharas Sanitation And Water District | 343 | 2 ppb |
| Navajo Western Wd Resorts | 341 | 2 ppb |
| Navajo Western Water District Estates | 145 | 0 (not detected) |
| Spanish Peaks Village Tract Ii Wa | 138 | 0 (not detected) |
| Huajatolla Valley Estates Inc | 132 | 0 (not detected) |
| Pinon Hills Water Users Association | 75 | 0 (not detected) |
What to do in your house
Look up your address in Tres Valles West's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Tres Valles West whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. A zero today does not rule out a jump later - the rules are tightening in 2027.