Is Lancaster, NH Tap Water Safe? Quality & Contaminants

What was found in Lancaster'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
Copper	1003.34 µg/L 77% of the EPA limit 1300 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Fluoride	590 µg/L 15% of the EPA limit 4000 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Nitrate	440 µg/L 4.4% of the EPA limit 10000 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Nitrate-Nitrite	415 µg/L 4.2% of the EPA limit 10000 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Total Haloacetic Acids (HAA5)	81.6 µg/L 136% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
TTHM	77.4 µg/L 97% of the EPA limit 80 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Chloroform	75.35 µg/L No EPA limit set Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Trichloroacetic Acid	47.85 µg/L No EPA limit set Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Dichloroacetic Acid	37.8 µg/L No EPA limit set Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Lead	14.32 µg/L 95% of the EPA limit 15 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2018	1/1	SYR4
Barium	9.325 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Bromodichloromethane	0.7500 µg/L No EPA limit set Main supplier: LANCASTER WATER DEPT · 2,500 people · 2019	1/1	SYR4
Combined Radium (-226 And -228)	0.2000 pCi/L 4% of the EPA limit 5 pCi/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2015	1/1	SYR4
Gross Alpha, Excl. Radon And U	0.2000 pCi/L 1.3% of the EPA limit 15 pCi/L Main supplier: LANCASTER WATER DEPT · 2,500 people · 2015	1/1	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 Lancaster

Supplier	Population served
LANCASTER WATER DEPT	2,500

Frequently asked questions about Lancaster tap water

Is Lancaster tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Lancaster. 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 Lancaster?

1 public water supplier report drinking-water monitoring for Lancaster, New Hampshire to the EPA. Each is listed above with its population served.

What contaminants are in Lancaster's water?

The contaminants EPA monitoring detected in Lancaster include Copper, Fluoride, Nitrate, Nitrate-Nitrite, 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.