Is Lincoln, NH Tap Water Safe? Quality & Contaminants

What was found in Lincoln'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
Fluoride	795 µg/L 20% of the EPA limit 4000 µg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Copper	147.25 µg/L 11% of the EPA limit 1300 µg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
TTHM	101.695 µg/L 127% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Chloroform	100 µg/L No EPA limit set Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Total Haloacetic Acids (HAA5)	95.95 µg/L 160% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Trichloroacetic Acid	67.65 µg/L No EPA limit set Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Dichloroacetic Acid	31.15 µg/L No EPA limit set Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Lead	17.2 µg/L 115% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2018	1/1	SYR4
Barium	5.025 µg/L 0.3% of the EPA limit 2000 µg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Bromodichloromethane	2.395 µg/L No EPA limit set Main supplier: LINCOLN WATER WORKS · 3,300 people · 2019	1/1	SYR4
Gross Alpha, Excl. Radon And U	1.74 pCi/L 12% of the EPA limit 15 pCi/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2014	1/1	SYR4
Combined Radium (-226 And -228)	1.49 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2014	1/1	SYR4
Combined Uranium	0.3900 µg/L 1.3% of the EPA limit 30 µg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2014	1/1	SYR4
Lead	0.0070 mg/L 47% of the EPA limit 0.0150 mg/L Main supplier: LINCOLN WATER WORKS · 3,300 people · 2024	1/1	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 Lincoln

Supplier	Population served
LINCOLN WATER WORKS	3,300

Frequently asked questions about Lincoln tap water

Is Lincoln tap water safe to drink?

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

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

What contaminants are in Lincoln's water?

The contaminants EPA monitoring detected in Lincoln include Fluoride, Copper, TTHM, Chloroform, 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.