← Nantucket, MA

Tap water quality report

ZIP 02564 — Nantucket, MA

EPA monitoring across the 1 water supplier serving ZIP 02564 in Nantucket, MA detected 5 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

1
water supplier
3,000
people served
5
contaminants found

What was found in ZIP 02564

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
1167 µg/L 12%
of the EPA limit 10000 µg/L
Main supplier: SIASCONSET WATER DEPARTMENT · 3,000 people · 2018
1/1 SYR4
Fluoride
188.5 µg/L 4.7%
of the EPA limit 4000 µg/L
Main supplier: SIASCONSET WATER DEPARTMENT · 3,000 people · 2019
1/1 SYR4
Barium
6.85 µg/L 0.3%
of the EPA limit 2000 µg/L
Main supplier: SIASCONSET WATER DEPARTMENT · 3,000 people · 2019
1/1 SYR4
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
Main supplier: SIASCONSET WATER DEPARTMENT · 3,000 people · 2019
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: SIASCONSET WATER DEPARTMENT · 3,000 people · 2025
1/1 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.

Water suppliers serving ZIP 02564

SupplierStatePopulation served
SIASCONSET WATER DEPARTMENT MA 3,000

Frequently asked questions about ZIP 02564 tap water

Is the tap water in ZIP 02564 safe to drink?

EPA testing detected 5 contaminants across the water suppliers serving ZIP 02564. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 02564?

1 public water supplier report EPA drinking-water monitoring for ZIP 02564. Each is listed above with its population served.

What contaminants are in ZIP 02564's water?

EPA monitoring detected Nitrate, Fluoride, Barium, Arsenic, Lead across this ZIP's suppliers. The full list with levels and sources is above.