Derby Mhp, VT
Lead detected, under the action levels
Latest 90th-percentile lead: 0.6 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.
Derby Mhp at a glance
Derby Mhp serves about 265 people through 101 service connections, which makes it a very small system under EPA's size classes. It is owned by the state and draws surface water, in Orleans County, Vermont. EPA system ID: VT0020744; phone on file: 802-828-1183. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Derby Mhp is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.6 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 2 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. Derby Mhp's 0.6 ppb sits at the 35th percentile in Vermont and the 45th nationally (higher means more lead).
Other water systems in Orleans County
21 other systems share Orleans County; 17 of them have a higher latest lead result than Derby Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Jay Peak Water System | 6,740 | 3 ppb |
| Newport City Water System | 4,766 | 2.3 ppb |
| Derby Center Water System | 1,400 | 2 ppb |
| Barton Water System | 950 | 2 ppb |
| North Troy Water System | 864 | 2.5 ppb |
| Orleans Water System | 846 | 4.7 ppb |
| Greensboro Fire District 1 | 551 | 1.1 ppb |
| Craftsbury Fire District 2 | 420 | 2.8 ppb |
| Newport Center Water System | 330 | 0.7 ppb |
| Troy Water System | 315 | 5.9 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Montpelier, 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 Derby Mhp 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. Systems that went over once often dip back under; here is what that means.