Chicosa Water Users Association, CO
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Chicosa Water Users Association
Chicosa Water Users Association serves about 40 people through 16 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Las Animas County, Colorado. EPA system ID: CO0136175; phone on file: 719-680-4703. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Chicosa Water Users Association's lead record
That is up 1.5 ppb from 0.5 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Chicosa Water Users Association is 6 ppb across 9 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2024 | 0.5 ppb |
| 2023 | 6 ppb |
| 2022 | 5.4 ppb |
| 2021 | 5.1 ppb |
| 2020 | 2.3 ppb |
| 2019 | 1.4 ppb |
| 2019 | 0.9 ppb |
| 2018 | 3.4 ppb |
How Chicosa Water Users Association compares
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. Chicosa Water Users Association's 2 ppb sits at the 67th percentile in Colorado and the 69th nationally (higher means more lead).
Nearby utilities
13 other systems share Las Animas County; 1 of them has a higher latest lead result than Chicosa Water Users Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Trinidad City Of | 11,400 | 0 (not detected) |
| El Moro Hoehne Pipeline Assoc | 655 | 0 (not detected) |
| Aguilar Town Of | 447 | 2 ppb |
| Santa Fe Trail Ranch Md | 360 | 0.9 ppb |
| Sunflower Valley Pipeline Assn | 312 | 0 (not detected) |
| Greetville Carbondale Water | 210 | 0.5 ppb |
| Trinidad Lake Ranches Poa | 200 | 0 (not detected) |
| Trinidad Manufactured Home Community | 133 | 0 (not detected) |
| Branson Town Of | 131 | 2.5 ppb |
| Cokedale Town Of | 120 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Trinidad, CO may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Chicosa Water Users Association 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. Systems that went over once often dip back under; here is what that means.