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Tap water quality report

Sandwich, MA

EPA monitoring detected 8 contaminants across the 2 water suppliers serving Sandwich. 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
79,250
people served
8
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Sandwich'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
120 µg/L 1.2%
of the EPA limit 10000 µg/L
Main supplier: UPPER CAPE REGIONAL WATER COOPERATIVE · 56,250 people · 2019
Highest in the city: 3408.5 µg/L — SANDWICH WATER DISTRICT · 23,000 people · 2019
2/2 SYR4
Fluoride
110 µg/L 2.8%
of the EPA limit 4000 µg/L
Highest in the city: SANDWICH WATER DISTRICT · 23,000 people · 2016
1/2 SYR4
Barium
16 µg/L 0.8%
of the EPA limit 2000 µg/L
Main supplier: UPPER CAPE REGIONAL WATER COOPERATIVE · 56,250 people · 2015
2/2 SYR4
Copper
14.9 µg/L 1.1%
of the EPA limit 1300 µg/L
Main supplier: UPPER CAPE REGIONAL WATER COOPERATIVE · 56,250 people · 2019
1/2 SYR4
TTHM
6.7 µg/L 8.4%
of the EPA limit 80 µg/L
Highest in the city: SANDWICH WATER DISTRICT · 23,000 people · 2019
1/2 SYR4
Tetrachloroethylene
1.6 µg/L 32%
of the EPA limit 5 µg/L
Highest in the city: SANDWICH WATER DISTRICT · 23,000 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
1.2 µg/L 2%
of the EPA limit 60 µg/L
Highest in the city: SANDWICH WATER DISTRICT · 23,000 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Highest in the city: SANDWICH WATER DISTRICT · 23,000 people · 2025
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 Sandwich

SupplierPopulation served
UPPER CAPE REGIONAL WATER COOPERATIVE 56,250
SANDWICH WATER DISTRICT 23,000

Frequently asked questions about Sandwich tap water

Is Sandwich tap water safe to drink?

EPA testing detected 8 contaminants in the water serving Sandwich. 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 Sandwich?

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

What contaminants are in Sandwich's water?

The contaminants EPA monitoring detected in Sandwich include Nitrate, Fluoride, Barium, Copper, 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.