Dillon Town Of, CO
Exceeded the action level in the past
Latest 90th-percentile lead: 5 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 Dillon Town Of
Dillon Town Of serves about 3,254 people through 566 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Summit County, Colorado. EPA system ID: CO0159035; phone on file: 970-262-3426. They can tell you what your service line is made of and whether they pay to replace it.
Dillon Town Of's lead record
That is down 3 ppb from 8 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Dillon Town Of is 96 ppb across 20 monitoring periods, 13 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 5 ppb |
| 2025 | 8 ppb |
| 2025 | 8 ppb |
| 2024 | 17 ppb over 15 |
| 2024 | 30 ppb over 15 |
| 2023 | 29 ppb over 15 |
| 2023 | 30 ppb over 15 |
| 2022 | 30 ppb over 15 |
| 2022 | 38 ppb over 15 |
| 2021 | 73 ppb over 15 |
| 2021 | 79 ppb over 15 |
| 2020 | 26 ppb over 15 |
| 2020 | 96 ppb over 15 |
| 2019 | 87 ppb over 15 |
| 2019 | 37 ppb over 15 |
| 2018 | 10 ppb |
| 2018 | 11 ppb over 10 |
| 2017 | 9 ppb |
| 2017 | 7 ppb |
| 2016 | 26 ppb over 15 |
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. Dillon Town Of's 5 ppb sits at the 93rd percentile in Colorado and the 91st nationally (higher means more lead).
Neighbouring systems
22 other systems share Summit County; 3 of them have a higher latest lead result than Dillon Town Of. 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 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 |
| Mesa Cortina Wsd | 466 | 2 ppb |
Next steps for Dillon, CO
Test your own tap with a certified lab first-draw sample; Dillon, 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 Dillon Town Of 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. More in what a past exceedance means today.