Tap WaterIndex

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Tap water quality report

Hanover, NH

EPA monitoring detected 12 contaminants across the 1 water supplier serving Hanover. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
9,600
people served
12
contaminants found
New Hampshire rankings Lead in New Hampshire PFAS in New Hampshire

What was found in Hanover's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
 1/1 SYR4
Copper
700 µg/L 54%
of the EPA limit 1300 µg/L
 1/1 SYR4
TTHM
72.3 µg/L 90%
of the EPA limit 80 µg/L
 1/1 SYR4
Chloroform
69 µg/L
No EPA limit set
 1/1 SYR4
Total Haloacetic Acids (HAA5)
52 µg/L 87%
of the EPA limit 60 µg/L
 1/1 SYR4
Trichloroacetic Acid
32 µg/L
No EPA limit set
 1/1 SYR4
Lead
30 µg/L 200%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
Dichloroacetic Acid
21 µg/L
No EPA limit set
 1/1 SYR4
Barium
15 µg/L 0.8%
of the EPA limit 2000 µg/L
 1/1 SYR4
Bromodichloromethane
4.9 µg/L
No EPA limit set
 1/1 SYR4
Combined Radium (-226 And -228)
0.3000 pCi/L 6%
of the EPA limit 5 pCi/L
 1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Hanover

SupplierPopulation served
HANOVER WATER DEPT 9,600

Frequently asked questions about Hanover tap water

Is Hanover tap water safe to drink?

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

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

What contaminants are in Hanover's water?

The contaminants EPA monitoring detected in Hanover include Fluoride, Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5). The full list, with the highest level found 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.