Is Gorham, NH Tap Water Safe? Quality & Contaminants

What was found in Gorham'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
Nitrate	246 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019 Highest in the city: 550 µg/L — GORHAM HILL SPRING · 55 people · 2019	2/2	SYR4
Nitrate-Nitrite	215 µg/L 2.2% of the EPA limit 10000 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019 Highest in the city: 547.5 µg/L — GORHAM HILL SPRING · 55 people · 2019	2/2	SYR4
Copper	227.86 µg/L 18% of the EPA limit 1300 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019 Highest in the city: 536.145 µg/L — GORHAM HILL SPRING · 55 people · 2018	2/2	SYR4
Fluoride	333 µg/L 8.3% of the EPA limit 4000 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	1/2	SYR4
TTHM	59.85 µg/L 75% of the EPA limit 80 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	2/2	SYR4
Chloroform	58.7 µg/L No EPA limit set Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	2/2	SYR4
Total Haloacetic Acids (HAA5)	35.95 µg/L 60% of the EPA limit 60 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	2/2	SYR4
Trichloroacetic Acid	18.9 µg/L No EPA limit set Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	2/2	SYR4
Dichloroacetic Acid	18 µg/L No EPA limit set Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	2/2	SYR4
Barium	7.8 µg/L 0.4% of the EPA limit 2000 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019 Highest in the city: 17.545 µg/L — GORHAM HILL SPRING · 55 people · 2018	2/2	SYR4
Lead	11.6 µg/L 77% of the EPA limit 15 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2018	2/2	SYR4
Monochloroacetic Acid	3 µg/L No EPA limit set Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	1/2	SYR4
Bromodichloromethane	1.3 µg/L No EPA limit set Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019 Highest in the city: 1.38 µg/L — GORHAM HILL SPRING · 55 people · 2019	2/2	SYR4
Combined Uranium	1 µg/L 3.3% of the EPA limit 30 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2015	1/2	SYR4
Gross Alpha, Excl. Radon And U	1 pCi/L 6.7% of the EPA limit 15 pCi/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2015	2/2	SYR4
Dibromochloromethane	0.7000 µg/L No EPA limit set Highest in the city: GORHAM HILL SPRING · 55 people · 2019	1/2	SYR4
Trichloroethylene	0.7000 µg/L 14% of the EPA limit 5 µg/L Main supplier: GORHAM WATER AND SEWER DEPT · 2,630 people · 2019	1/2	SYR4
Lead	0.0300 mg/L 200% above the EPA limit of 0.0150 mg/L Highest in the city: GORHAM HILL SPRING · 55 people · 1994	1/2	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 Gorham

Supplier	Population served
GORHAM WATER AND SEWER DEPT	2,630
GORHAM HILL SPRING	55

Frequently asked questions about Gorham tap water

Is Gorham tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Gorham. 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 Gorham?

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

What contaminants are in Gorham's water?

The contaminants EPA monitoring detected in Gorham include Nitrate, Nitrate-Nitrite, Copper, Fluoride, 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.