Grand Isle Fire District 4, VT
Lead detected, under the action levels
Latest 90th-percentile lead: 6.3 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.
About Grand Isle Fire District 4
Grand Isle Fire District 4 serves about 1,078 people through 365 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 Grand Isle County, Vermont. EPA system ID: VT0005139; phone on file: 802-372-8380. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Grand Isle Fire District 4's lead record
That is up 5.2 ppb from 1.1 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Grand Isle Fire District 4 is 6.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 6.3 ppb |
| 2019 | 1.1 ppb |
| 2017 | 1 ppb |
| 2017 | 1 ppb |
How Grand Isle Fire District 4 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. Grand Isle Fire District 4's 6.3 ppb sits at the 92nd percentile in Vermont and the 94th nationally (higher means more lead).
Neighbouring systems
6 other systems share Grand Isle County; 0 of them have a higher latest lead result than Grand Isle Fire District 4. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| North Hero Water System | 2,750 | 0 (not detected) |
| Grand Isle Consolidated Water District | 1,600 | 2.8 ppb |
| South Hero Fire District 4 | 760 | 3.4 ppb |
| Alburgh Village Water System | 576 | 2.2 ppb |
| South Alburgh Fire District 2 | 300 | 0.6 ppb |
| Alburgh Fire District 1 | 87 | 1 ppb |
Next steps for Grand Isle, VT
Test your own tap with a certified lab first-draw sample; Grand Isle, 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 Grand Isle Fire District 4 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. Size matters more than most people expect: small vs large water systems.