Mountain Water Company, VT
Exceeded the action level in the past
Latest 90th-percentile lead: 1.8 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 Mountain Water Company
Mountain Water Company serves about 2,400 people through 652 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws surface water, in Washington County, Vermont. EPA system ID: VT0005281; phone on file: 802-583-6340. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 38.6 ppb from 40.4 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Mountain Water Company is 170 ppb across 15 monitoring periods, 8 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.8 ppb |
| 2025 | 40.4 ppb over 15 |
| 2024 | 8 ppb |
| 2023 | 10.4 ppb over 10 |
| 2023 | 18.3 ppb over 15 |
| 2022 | 56.1 ppb over 15 |
| 2021 | 10.2 ppb over 10 |
| 2019 | 5.3 ppb |
| 2019 | 9 ppb |
| 2018 | 7.6 ppb |
| 2018 | 30.7 ppb over 15 |
| 2017 | 22.8 ppb over 15 |
| 2017 | 23.1 ppb over 15 |
| 2016 | 170 ppb over 15 |
| 2016 | 35 ppb over 15 |
How Mountain Water Company compares
Of the 372 Vermont systems with a lead result, the median latest reading is 1.4 ppb; 7 are over 15 ppb right now and 65 have gone over at some point. Mountain Water Company's 1.8 ppb sits at the 57th percentile in Vermont and the 68th nationally (higher means more lead).
Other water systems in Washington County
41 other systems share Washington County; 18 of them have a higher latest lead result than Mountain Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Barre City Water System | 14,000 | 0 (not detected) |
| Montpelier Water System | 8,912 | 2 ppb |
| Edward Farrar Utility District | 6,003 | 2.2 ppb |
| Northfield Water Dept | 5,145 | 5 ppb |
| Berlin Municipal Water System | 1,819 | 2 ppb |
| Barre Town Water System | 1,638 | 0 (not detected) |
| Central Vermont Medical Center | 1,528 | 6.1 ppb |
| Plainfield Water System | 985 | 2.6 ppb |
| Graniteville Fire District 4 | 700 | 0 (not detected) |
| Waitsfield Water Supply | 450 | 0 (not detected) |
Next steps for Warren, VT
Test your own tap with a certified lab first-draw sample; Warren, VT 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 Mountain Water Company 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. The lead result guide covers how utilities pick the homes they sample. More in what a past exceedance means today.