Grand County Water No 1, CO
Exceeded the action level in the past
Latest 90th-percentile lead: 1 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 Grand County Water No 1
Grand County Water No 1 serves about 5,400 people through 702 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Grand County, Colorado. EPA system ID: CO0125323; phone on file: 970-726-5583. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 1.1 ppb from 2.1 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Grand County Water No 1 is 16 ppb across 18 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 2.1 ppb |
| 2025 | 2 ppb |
| 2024 | 2.9 ppb |
| 2024 | 4 ppb |
| 2023 | 9.6 ppb |
| 2023 | 14 ppb over 10 |
| 2022 | 7 ppb |
| 2022 | 5 ppb |
| 2021 | 2 ppb |
| 2021 | 9 ppb |
| 2020 | 11 ppb over 10 |
| 2020 | 13.7 ppb over 10 |
| 2019 | 2 ppb |
| 2018 | 3 ppb |
| 2018 | 3 ppb |
| 2017 | 16 ppb over 15 |
| 2016 | 3 ppb |
How Grand County Water No 1 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. Grand County Water No 1's 1 ppb sits at the 56th percentile in Colorado and the 55th nationally (higher means more lead).
Nearby utilities
23 other systems share Grand County; 13 of them have a higher latest lead result than Grand County Water No 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Winter Park Wsd | 6,635 | 3 ppb |
| Winter Park Ranch Wsd | 3,250 | 2 ppb |
| Granby Town Of South Service Area | 2,300 | 2 ppb |
| Fraser Town Of | 2,150 | 6.8 ppb |
| Grand Lake Town Of | 2,035 | 1.8 ppb |
| Granby Town Of North Service Area | 2,025 | 8 ppb |
| Kremmling Town Of | 1,859 | 0 (not detected) |
| Hot Sulphur Springs Town Of | 687 | 2 ppb |
| Ymca Snow Mtn Ranch | 578 | 0 (not detected) |
| Tabernash Meadows Wsd | 564 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Winter Park, 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 Grand County Water No 1 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.