Winooski Water Dept, VT
Lead detected, under the action levels
Latest 90th-percentile lead: 0.4 ppb (monitoring period 2023-2025). 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.
Winooski Water Dept at a glance
Winooski Water Dept serves about 8,500 people through 1,744 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 Chittenden County, Vermont. EPA system ID: VT0005102; phone on file: 802-540-5122. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
The highest 90th-percentile result EPA holds for Winooski Water Dept is 0.4 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.4 ppb |
Where this result ranks
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. Winooski Water Dept's 0.4 ppb sits at the 30th percentile in Vermont and the 42nd nationally (higher means more lead).
Neighbouring systems
44 other systems share Chittenden County; 21 of them have a higher latest lead result than Winooski Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Burlington Dept Public Works Water Div | 42,000 | 1.4 ppb |
| South Burlington City Water System | 19,500 | 0 (not detected) |
| Colchester Water System | 11,299 | 0 (not detected) |
| Essex Town Water System | 9,734 | 0 (not detected) |
| Essex Jct Water Dept | 9,500 | 0.7 ppb |
| Colchester Fire District 2 | 8,300 | 0 (not detected) |
| Milton Water Dept | 8,260 | 0 (not detected) |
| Williston Water Dept | 7,259 | 1.2 ppb |
| Shelburne Water Dept | 5,764 | 0 (not detected) |
| Hinesburg Water Dept | 2,800 | 0 (not detected) |
Next steps for Winooski, VT
Test your own tap with a certified lab first-draw sample; Winooski, 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 Winooski Water Dept 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. The action level is dropping - the 10 ppb rule from 2027.