Mesa Cortina Wsd, CO
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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. 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 Mesa Cortina Wsd
Mesa Cortina Wsd serves about 466 people through 249 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 groundwater, in Summit County, Colorado. EPA system ID: CO0159080; phone on file: 720-201-6420. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Mesa Cortina Wsd's lead record
That is down 1.5 ppb from 3.5 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Mesa Cortina Wsd is 12 ppb across 16 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2025 | 3.5 ppb |
| 2024 | 1.5 ppb |
| 2023 | 3 ppb |
| 2023 | 5 ppb |
| 2022 | 4 ppb |
| 2022 | 2 ppb |
| 2021 | 4 ppb |
| 2021 | 2 ppb |
| 2020 | 3 ppb |
| 2020 | 11 ppb over 10 |
| 2019 | 5 ppb |
| 2019 | 12 ppb over 10 |
| 2018 | 4 ppb |
| 2018 | 6 ppb |
| 2017 | 2.5 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. Mesa Cortina Wsd's 2 ppb sits at the 71st percentile in Colorado and the 71st nationally (higher means more lead).
Nearby utilities
22 other systems share Summit County; 9 of them have a higher latest lead result than Mesa Cortina Wsd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Breckenridge Town Of | 28,315 | 2 ppb |
| Snake River Wd | 9,900 | 0.9 ppb |
| Silverthorne Town Of | 8,400 | 0 (not detected) |
| Copper Mountain Consolidated Md | 5,785 | 5 ppb |
| Frisco Town Of | 4,495 | 4 ppb |
| Dillon Town Of | 3,254 | 5 ppb |
| Dillon Valley District | 3,063 | 3 ppb |
| Buffalo Mountain Md | 2,650 | 1 ppb |
| East Dillon Wd | 2,501 | 4.2 ppb |
| Keystone Ranch | 670 | 6 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Wheat Ridge, 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 Mesa Cortina Wsd whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1610 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.