Mountaindale, VT
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 11.8 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Who runs the water here
Mountaindale serves about 48 people through 18 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Windham County, Vermont. EPA system ID: VT0020003; phone on file: 802-464-5749. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 88.2 ppb from 100 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Mountaindale is 110 ppb across 11 monitoring periods, 4 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 11.8 ppb over 10 |
| 2025 | 100 ppb over 15 |
| 2025 | 19.4 ppb over 15 |
| 2024 | 10.8 ppb over 10 |
| 2024 | 5.3 ppb |
| 2023 | 6.6 ppb |
| 2023 | 6.3 ppb |
| 2022 | 110 ppb over 15 |
| 2022 | 57 ppb over 15 |
| 2019 | 4.6 ppb |
| 2016 | 6 ppb |
Against other Vermont systems
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. Mountaindale's 11.8 ppb sits at the 96th percentile in Vermont and the 98th nationally (higher means more lead).
Nearby utilities
42 other systems share Windham County; 2 of them have a higher latest lead result than Mountaindale. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Brattleboro Water Dept | 12,200 | 0 (not detected) |
| Winhall Stratton F D 1 | 6,200 | 1.9 ppb |
| Bellows Falls Water Dept | 4,000 | 1.8 ppb |
| Chimney Hill | 2,594 | 4.6 ppb |
| Town Of Wilmington Water System | 1,400 | 2 ppb |
| Putney Water System | 1,300 | 2.6 ppb |
| Timber Creek Coa Inc | 1,116 | 4.8 ppb |
| Cold Brook Fd Base Area | 761 | 14.3 ppb |
| Cold Brook Fire District 1 | 700 | 0 (not detected) |
| Seasons On Mount Snow | 623 | 1.7 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; West Dover, 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 Mountaindale 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. What a 90th-percentile result does and does not tell you: how to read a lead result. See what changes at 10 ppb in 2027.