What was found in Derby's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 2800 µg/L 28% of the EPA limit 10000 µg/L Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019 | 1/5 | SYR4 |
| Copper | 492 µg/L 38% of the EPA limit 1300 µg/L Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019 | 5/5 | SYR4 |
| Lead | 34 µg/L 227% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019 | 5/5 | SYR4 |
| TTHM | 24.46 µg/L 31% of the EPA limit 80 µg/L Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019
Highest in the city: 24.775 µg/L — SHATTUCK HILL MHP · 129 people · 2019 | 5/5 | SYR4 |
| Chloroform | 18.475 µg/L No EPA limit set Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019 | 5/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 15.645 µg/L 26% of the EPA limit 60 µg/L Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019
Highest in the city: 17.565 µg/L — DERBY MHP · 265 people · 2019 | 3/5 | SYR4 |
| Trichloroacetic Acid | 8.8 µg/L No EPA limit set Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019
Highest in the city: 9.905 µg/L — SHATTUCK HILL MHP · 129 people · 2019 | 3/5 | SYR4 |
| Dichloroacetic Acid | 7.985 µg/L No EPA limit set Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019
Highest in the city: 9.82 µg/L — DERBY MHP · 265 people · 2019 | 3/5 | SYR4 |
| Bromodichloromethane | 5.4 µg/L No EPA limit set Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019 | 5/5 | SYR4 |
| Dibromochloromethane | 2.06 µg/L No EPA limit set Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019
Highest in the city: 2.695 µg/L — SHATTUCK HILL MHP · 129 people · 2019 | 4/5 | SYR4 |
| Bromoform | 0.8700 µg/L No EPA limit set Highest in the city: SHATTUCK HILL MHP · 129 people · 2019 | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 0.7380 pCi/L 15% of the EPA limit 5 pCi/L Highest in the city: DERBY LINE VILLAGE WATER DISTRICT · 897 people · 2015 | 1/5 | SYR4 |
| Benzo(A)Pyrene | 0.6000 µg/L 300% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2019 | 1/5 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: DERBY CENTER WATER SYSTEM · 1,400 people · 2024
Highest in the city: 0.0030 mg/L — BEEBE PLAIN WATER SYSTEM · 142 people · 2015 | 5/5 | LCR |
Water suppliers serving Derby
| Supplier | Population served |
|---|---|
| DERBY CENTER WATER SYSTEM | 1,400 |
| DERBY LINE VILLAGE WATER DISTRICT | 897 |
| DERBY MHP | 265 |
| BEEBE PLAIN WATER SYSTEM | 142 |
| SHATTUCK HILL MHP | 129 |
Frequently asked questions about Derby tap water
Is Derby tap water safe to drink?
EPA testing detected 14 contaminants in the water serving Derby. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Derby?
5 public water suppliers report drinking-water monitoring for Derby, Vermont to the EPA. Each is listed above with its population served.
What contaminants are in Derby's water?
The contaminants EPA monitoring detected in Derby include Nitrate, Copper, Lead, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.