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Tap water quality report

Mashpee, MA

EPA monitoring detected 10 contaminants across the 3 water suppliers serving Mashpee. 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
37,256
people served
10
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Mashpee'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
1901 µg/L 19%
of the EPA limit 10000 µg/L
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2019
Highest in the city: 5130 µg/L — BEECHWOOD POINT CONDOS · 112 people · 2019
3/3 SYR4
Fluoride
760 µg/L 19%
of the EPA limit 4000 µg/L
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2018
2/3 SYR4
Barium
63.5 µg/L 3.2%
of the EPA limit 2000 µg/L
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2018
2/3 SYR4
Nitrite
54 µg/L 5.4%
of the EPA limit 1000 µg/L
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2017
1/3 SYR4
Copper
40.4 µg/L 3.1%
of the EPA limit 1300 µg/L
Highest in the city: SEA OAKS CONDOMINIUMS · 222 people · 2019
2/3 SYR4
Lead
1.4 µg/L 9.3%
of the EPA limit 15 µg/L
Highest in the city: SEA OAKS CONDOMINIUMS · 222 people · 2016
1/3 SYR4
Tetrachloroethylene
1.379 µg/L 28%
of the EPA limit 5 µg/L
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2019
1/3 SYR4
Thallium, Total
1 µg/L 50%
of the EPA limit 2 µg/L
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2018
1/3 SYR4
Pfba
0.0080 µg/L
No EPA limit set
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2024
1/3 UCMR-5
Lead
0.0014 mg/L 9.3%
of the EPA limit 0.0150 mg/L
Main supplier: MASHPEE WATER DISTRICT · 36,922 people · 2024
3/3 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 Mashpee

SupplierPopulation served
MASHPEE WATER DISTRICT 36,922
SEA OAKS CONDOMINIUMS 222
BEECHWOOD POINT CONDOS 112

Frequently asked questions about Mashpee tap water

Is Mashpee tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Mashpee. 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 Mashpee?

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

What contaminants are in Mashpee's water?

The contaminants EPA monitoring detected in Mashpee include Nitrate, Fluoride, Barium, Nitrite, 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.