Upper Surface Creek Domestic Wua, CO
Exceeded the action level in the past
Latest 90th-percentile lead: 3 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Upper Surface Creek Domestic Wua
Upper Surface Creek Domestic Wua serves about 2,800 people through 971 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws surface water, in Delta County, Colorado. EPA system ID: CO0115784; phone on file: 970-856-7199. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2025 (4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Upper Surface Creek Domestic Wua is 38 ppb across 14 monitoring periods, 3 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3 ppb |
| 2025 | 4 ppb |
| 2025 | 3 ppb |
| 2024 | 8 ppb |
| 2024 | 4 ppb |
| 2023 | 18 ppb over 15 |
| 2023 | 38 ppb over 15 |
| 2022 | 11 ppb over 10 |
| 2022 | 6 ppb |
| 2021 | 25 ppb over 15 |
| 2020 | 5 ppb |
| 2019 | 12 ppb over 10 |
| 2018 | 8 ppb |
| 2017 | 10 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. Upper Surface Creek Domestic Wua's 3 ppb sits at the 84th percentile in Colorado and the 82nd nationally (higher means more lead).
Other water systems in Delta County
29 other systems share Delta County; 4 of them have a higher latest lead result than Upper Surface Creek Domestic Wua. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Delta City Of | 8,700 | - |
| Orchard City Town Of | 3,100 | 7 ppb |
| Paonia Town Of | 2,499 | 1.2 ppb |
| Cedaredge Town Of | 2,400 | 2 ppb |
| Hotchkiss Town Of | 2,050 | 0.8 ppb |
| Rogers Mesa Wc | 840 | 0 (not detected) |
| Crawford Mesa Wa | 486 | 8.4 ppb |
| Crawford Town Of | 477 | 1 ppb |
| Bone Mesa Domestic Wd | 400 | 0 (not detected) |
| Pitkin Mesa Pipeline Co | 295 | 2.5 ppb |
Next steps for Cedaredge, CO
Test your own tap with a certified lab first-draw sample; Cedaredge, 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 Upper Surface Creek Domestic Wua whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1400 ppb (copper action level 1,300 ppb).
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. The lead result guide covers how utilities pick the homes they sample. Why an old exceedance still matters: over the limit before, under it now.