Is Wilmington, VT Tap Water Safe? Quality & Contaminants

What was found in Wilmington'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	628.5 µg/L 6.3% of the EPA limit 10000 µg/L Main supplier: CHIMNEY HILL · 2,594 people · 2019 Highest in the city: 2600 µg/L — COLD BROOK FD BASE AREA · 761 people · 2019	4/4	SYR4
Copper	839 µg/L 65% of the EPA limit 1300 µg/L Main supplier: CHIMNEY HILL · 2,594 people · 2018	4/4	SYR4
Fluoride	680 µg/L 17% of the EPA limit 4000 µg/L Highest in the city: TOWN OF WILMINGTON WATER SYSTEM · 1,400 people · 2019	3/4	SYR4
Barium	72.25 µg/L 3.6% of the EPA limit 2000 µg/L Highest in the city: COLD BROOK FD BASE AREA · 761 people · 2018	3/4	SYR4
Total Haloacetic Acids (HAA5)	18.075 µg/L 30% of the EPA limit 60 µg/L Main supplier: CHIMNEY HILL · 2,594 people · 2019	2/4	SYR4
TTHM	15.4 µg/L 19% of the EPA limit 80 µg/L Main supplier: CHIMNEY HILL · 2,594 people · 2019 Highest in the city: 17.164 µg/L — TOWN OF WILMINGTON WATER SYSTEM · 1,400 people · 2019	4/4	SYR4
Combined Uranium	16.654 µg/L 56% of the EPA limit 30 µg/L Highest in the city: COLD BROOK FD BASE AREA · 761 people · 2014	1/4	SYR4
Chloroform	10.625 µg/L No EPA limit set Main supplier: CHIMNEY HILL · 2,594 people · 2019 Highest in the city: 13.48 µg/L — TOWN OF WILMINGTON WATER SYSTEM · 1,400 people · 2019	4/4	SYR4
Lead	12 µg/L 80% of the EPA limit 15 µg/L Main supplier: CHIMNEY HILL · 2,594 people · 2018	4/4	SYR4
Trichloroacetic Acid	9.16 µg/L No EPA limit set Main supplier: CHIMNEY HILL · 2,594 people · 2019	2/4	SYR4
Dichloroacetic Acid	9.035 µg/L No EPA limit set Main supplier: CHIMNEY HILL · 2,594 people · 2019	2/4	SYR4
Benzene	3.05 µg/L 61% of the EPA limit 5 µg/L Highest in the city: COLD BROOK FD BASE AREA · 761 people · 2019	1/4	SYR4
Bromodichloromethane	1.715 µg/L No EPA limit set Main supplier: CHIMNEY HILL · 2,594 people · 2019 Highest in the city: 2.93 µg/L — TOWN OF WILMINGTON WATER SYSTEM · 1,400 people · 2019	4/4	SYR4
Dibromochloromethane	2.7 µg/L No EPA limit set Main supplier: CHIMNEY HILL · 2,594 people · 2019	4/4	SYR4
Combined Radium (-226 And -228)	0.6400 pCi/L 13% of the EPA limit 5 pCi/L Main supplier: CHIMNEY HILL · 2,594 people · 2019 Highest in the city: 2.4355 pCi/L — COLD BROOK FD BASE AREA · 761 people · 2018	3/4	SYR4
Xylenes, Total	2 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CHIMNEY HILL · 2,594 people · 2019	1/4	SYR4
Bromoform	1.4 µg/L No EPA limit set Main supplier: CHIMNEY HILL · 2,594 people · 2019	3/4	SYR4
Gross Alpha, Excl. Radon And U	0.9400 pCi/L 6.3% of the EPA limit 15 pCi/L Highest in the city: COLD BROOK FD BASE AREA · 761 people · 2014	1/4	SYR4
Di(2-ethylhexyl) Phthalate	0.6400 µg/L 11% of the EPA limit 6 µg/L Highest in the city: TOWN OF WILMINGTON WATER SYSTEM · 1,400 people · 2017	1/4	SYR4
Lead	0.0046 mg/L 31% of the EPA limit 0.0150 mg/L Main supplier: CHIMNEY HILL · 2,594 people · 2025 Highest in the city: 0.0089 mg/L — COLD BROOK FD BASE AREA · 761 people · 2023	4/4	LCR

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Wilmington

Supplier	Population served
CHIMNEY HILL	2,594
TOWN OF WILMINGTON WATER SYSTEM	1,400
COLD BROOK FD BASE AREA	761
COLD BROOK FIRE DISTRICT 1	700

Frequently asked questions about Wilmington tap water

Is Wilmington tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Wilmington. 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 Wilmington?

4 public water suppliers report drinking-water monitoring for Wilmington, Vermont to the EPA. Each is listed above with its population served.

What contaminants are in Wilmington's water?

The contaminants EPA monitoring detected in Wilmington include Nitrate, Copper, Fluoride, Barium, Total Haloacetic Acids (HAA5). 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.