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Tap water quality report

Carroll, NH

EPA monitoring detected 16 contaminants across the 2 water suppliers serving Carroll. 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.

2
water suppliers
1,925
people served
16
contaminants found
New Hampshire rankings Lead in New Hampshire PFAS in New Hampshire

What was found in Carroll'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
Copper
1600 µg/L 123%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
2/2 SYR4
Fluoride
278 µg/L 7%
of the EPA limit 4000 µg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2018
Highest in the city: 388.5 µg/L — CARROLL WATER WORKS · 875 people · 2019
2/2 SYR4
Barium
53 µg/L 2.7%
of the EPA limit 2000 µg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2018
1/2 SYR4
Lead
8.3 µg/L 55%
of the EPA limit 15 µg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
Highest in the city: 11.595 µg/L — CARROLL WATER WORKS · 875 people · 2019
2/2 SYR4
TTHM
11.145 µg/L 14%
of the EPA limit 80 µg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
1/2 SYR4
Chloroform
7.64 µg/L
No EPA limit set
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
6.755 µg/L 11%
of the EPA limit 60 µg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
1/2 SYR4
Gross Alpha, Excl. Radon And U
4.675 pCi/L 31%
of the EPA limit 15 pCi/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2016
1/2 SYR4
Dichloroacetic Acid
4.275 µg/L
No EPA limit set
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
1/2 SYR4
Bromodichloromethane
2.94 µg/L
No EPA limit set
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
1/2 SYR4
Trichloroacetic Acid
2.77 µg/L
No EPA limit set
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
1/2 SYR4
Combined Uranium
0.6950 µg/L 2.3%
of the EPA limit 30 µg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2016
Highest in the city: 1.6 µg/L — CARROLL WATER WORKS · 875 people · 2019
2/2 SYR4
Dibromochloromethane
1.135 µg/L
No EPA limit set
Main supplier: ROSEBROOK WATER · 1,050 people · 2019
1/2 SYR4
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
Highest in the city: CARROLL WATER WORKS · 875 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
0.5850 pCi/L 12%
of the EPA limit 5 pCi/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2016
1/2 SYR4
Lead
0.0480 mg/L 320%
above the EPA limit of 0.0150 mg/L
Main supplier: ROSEBROOK WATER · 1,050 people · 2004
2/2 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 Carroll

SupplierPopulation served
ROSEBROOK WATER 1,050
CARROLL WATER WORKS 875

Frequently asked questions about Carroll tap water

Is Carroll tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Carroll. 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 Carroll?

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

What contaminants are in Carroll's water?

The contaminants EPA monitoring detected in Carroll include Copper, Fluoride, Barium, Lead, TTHM. 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.