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Tap water quality report

Brentwood, NH

EPA monitoring detected 17 contaminants across the 3 water suppliers serving Brentwood. 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.

3
water suppliers
1,518
people served
17
contaminants found
New Hampshire rankings Lead in New Hampshire PFAS in New Hampshire

What was found in Brentwood'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
1500 µg/L 15%
of the EPA limit 10000 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Nitrate-Nitrite
1347.5 µg/L 13%
of the EPA limit 10000 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2014
1/3 SYR4
Fluoride
226 µg/L 5.7%
of the EPA limit 4000 µg/L
Highest in the city: MILL POND CROSSING · 72 people · 2019
1/3 SYR4
Combined Radium (-226 And -228)
0.5750 pCi/L 12%
of the EPA limit 5 pCi/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2015
Highest in the city: 150.2 pCi/L — MILL POND CROSSING · 72 people · 2018
2/3 SYR4
Copper
117 µg/L 9%
of the EPA limit 1300 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2018
2/3 SYR4
Barium
9.55 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2018
Highest in the city: 27.697 µg/L — MILL POND CROSSING · 72 people · 2019
2/3 SYR4
Gross Alpha, Excl. Radon And U
1.36 pCi/L 9.1%
of the EPA limit 15 pCi/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2015
Highest in the city: 10.225 pCi/L — MILL POND CROSSING · 72 people · 2017
2/3 SYR4
TTHM
5.24 µg/L 6.6%
of the EPA limit 80 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Lead
4.4 µg/L 29%
of the EPA limit 15 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2017
2/3 SYR4
Combined Uranium
0.5950 µg/L 2%
of the EPA limit 30 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2015
Highest in the city: 3.465 µg/L — MILL POND CROSSING · 72 people · 2017
2/3 SYR4
Dibromoacetic Acid
2.02 µg/L
No EPA limit set
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Total Haloacetic Acids (HAA5)
2.02 µg/L 3.4%
of the EPA limit 60 µg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Dibromochloromethane
1.8 µg/L
No EPA limit set
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Bromodichloromethane
1.585 µg/L
No EPA limit set
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Bromoform
1.4 µg/L
No EPA limit set
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Chloroform
1.165 µg/L
No EPA limit set
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 2019
1/3 SYR4
Lead
0.0220 mg/L 147%
above the EPA limit of 0.0150 mg/L
Main supplier: ROCKINGHAM COUNTY COMPLEX · 1,387 people · 1997
1/3 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 Brentwood

SupplierPopulation served
ROCKINGHAM COUNTY COMPLEX 1,387
MILL POND CROSSING 72
RIVER RUN BRENTWOOD 59

Frequently asked questions about Brentwood tap water

Is Brentwood tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Brentwood. 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 Brentwood?

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

What contaminants are in Brentwood's water?

The contaminants EPA monitoring detected in Brentwood include Nitrate, Nitrate-Nitrite, Fluoride, Combined Radium (-226 And -228), Copper. 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.