Is Deerfield, NH Tap Water Safe? Quality & Contaminants

What was found in Deerfield'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	1870 µg/L 19% of the EPA limit 10000 µg/L Highest in the city: CORNERSTONE PLACE · 20 people · 2019	1/3	SYR4
Fluoride	898.5 µg/L 22% of the EPA limit 4000 µg/L Main supplier: INN AT DEERFIELD · 57 people · 2018	3/3	SYR4
Copper	120 µg/L 9.2% of the EPA limit 1300 µg/L Main supplier: INN AT DEERFIELD · 57 people · 2019 Highest in the city: 166.17 µg/L — SHERBURN WOODS · 25 people · 2017	3/3	SYR4
Combined Uranium	2.2 µg/L 7.3% of the EPA limit 30 µg/L Main supplier: INN AT DEERFIELD · 57 people · 2015 Highest in the city: 140.395 µg/L — CORNERSTONE PLACE · 20 people · 2019	3/3	SYR4
Barium	5.8 µg/L 0.3% of the EPA limit 2000 µg/L Highest in the city: CORNERSTONE PLACE · 20 people · 2017	1/3	SYR4
Lead	1.95 µg/L 13% of the EPA limit 15 µg/L Main supplier: INN AT DEERFIELD · 57 people · 2019 Highest in the city: 5.24 µg/L — CORNERSTONE PLACE · 20 people · 2019	3/3	SYR4
Chromium	4 µg/L 4% of the EPA limit 100 µg/L Highest in the city: SHERBURN WOODS · 25 people · 2017	1/3	SYR4
Arsenic	3.1 µg/L 31% of the EPA limit 10 µg/L Highest in the city: SHERBURN WOODS · 25 people · 2019	1/3	SYR4
Xylenes, Total	2.6 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: SHERBURN WOODS · 25 people · 2019	1/3	SYR4
Combined Radium (-226 And -228)	2.315 pCi/L 46% of the EPA limit 5 pCi/L Highest in the city: CORNERSTONE PLACE · 20 people · 2016	1/3	SYR4
Gross Alpha, Excl. Radon And U	1.395 pCi/L 9.3% of the EPA limit 15 pCi/L Highest in the city: CORNERSTONE PLACE · 20 people · 2016	1/3	SYR4
Ethylbenzene	0.5000 µg/L 0.1% of the EPA limit 700 µg/L Highest in the city: SHERBURN WOODS · 25 people · 2019	1/3	SYR4

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 Deerfield

Supplier	Population served
INN AT DEERFIELD	57
SHERBURN WOODS	25
CORNERSTONE PLACE	20

Frequently asked questions about Deerfield tap water

Is Deerfield tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Deerfield. 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 Deerfield?

3 public water suppliers report drinking-water monitoring for Deerfield, New Hampshire to the EPA. Each is listed above with its population served.

What contaminants are in Deerfield's water?

The contaminants EPA monitoring detected in Deerfield include Nitrate, Fluoride, Copper, Combined Uranium, Barium. 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.