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Tap water quality report

Keene, NH

EPA monitoring detected 13 contaminants across the 1 water supplier serving Keene. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
30,000
people served
13
contaminants found
New Hampshire rankings Lead in New Hampshire PFAS in New Hampshire

What was found in Keene'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
3000 µg/L 30%
of the EPA limit 10000 µg/L
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Copper
950.5 µg/L 73%
of the EPA limit 1300 µg/L
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
TTHM
66.1 µg/L 83%
of the EPA limit 80 µg/L
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Chloroform
60.55 µg/L
No EPA limit set
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
54.8 µg/L 91%
of the EPA limit 60 µg/L
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Trichloroacetic Acid
29.8 µg/L
No EPA limit set
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Dichloroacetic Acid
22.22 µg/L
No EPA limit set
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Lead
12.05 µg/L 80%
of the EPA limit 15 µg/L
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Bromodichloromethane
5.44 µg/L
No EPA limit set
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Dibromochloromethane
2.535 µg/L
No EPA limit set
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Bromoform
0.5000 µg/L
No EPA limit set
Main supplier: KEENE WATER DEPT · 30,000 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
0.1000 pCi/L 0.7%
of the EPA limit 15 pCi/L
Main supplier: KEENE WATER DEPT · 30,000 people · 2015
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: KEENE WATER DEPT · 30,000 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 Keene

SupplierPopulation served
KEENE WATER DEPT 30,000

Frequently asked questions about Keene tap water

Is Keene tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Keene. 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 Keene?

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

What contaminants are in Keene's water?

The contaminants EPA monitoring detected in Keene include Nitrate, 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.