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Tap water quality report

Falmouth, MA

EPA monitoring detected 19 contaminants across the 2 water suppliers serving Falmouth. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
103,551
people served
19
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Falmouth'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
Nitrate
1920 µg/L 19%
of the EPA limit 10000 µg/L
 2/2 SYR4
Fluoride
1150 µg/L 29%
of the EPA limit 4000 µg/L
 1/2 SYR4
TTHM
190 µg/L 238%
of the EPA limit, in the worst sample — 80 µg/L
 2/2 SYR4
Chloroform
140 µg/L
No EPA limit set
 2/2 SYR4
Total Haloacetic Acids (HAA5)
102 µg/L 170%
of the EPA limit, in the worst sample — 60 µg/L
 2/2 SYR4
Copper
86 µg/L 6.6%
of the EPA limit 1300 µg/L
 2/2 SYR4
Dichloroacetic Acid
42 µg/L
No EPA limit set
 2/2 SYR4
Barium
41 µg/L 2.1%
of the EPA limit 2000 µg/L
 2/2 SYR4
Bromodichloromethane
36 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
28 µg/L
No EPA limit set
 2/2 SYR4
Tetrachloroethylene
16 µg/L 320%
of the EPA limit, in the worst sample — 5 µg/L
 1/2 SYR4
Dibromochloromethane
12 µg/L
No EPA limit set
 2/2 SYR4
Monobromoacetic Acid
8.72 µg/L
No EPA limit set
 1/2 SYR4
Monochloroacetic Acid
6.38 µg/L
No EPA limit set
 2/2 SYR4
Bromoform
3.14 µg/L
No EPA limit set
 2/2 SYR4
Dibromoacetic Acid
2.25 µg/L
No EPA limit set
 2/2 SYR4
Antimony, Total
2 µg/L 33%
of the EPA limit 6 µg/L
 1/2 SYR4
Bromate
1.6 µg/L 16%
of the EPA limit 10 µg/L
 1/2 SYR4
Lead
0.0015 mg/L 10%
of the EPA limit 0.0150 mg/L
 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 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 Falmouth

SupplierPopulation served
FALMOUTH WATER DEPT 97,551
OTIS AIR NATIONAL GUARD BASE 6,000

Frequently asked questions about Falmouth tap water

Is Falmouth tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Falmouth. 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 Falmouth?

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

What contaminants are in Falmouth's water?

The contaminants EPA monitoring detected in Falmouth include Nitrate, Fluoride, 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.