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City water profile

Barnstable Town water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Barnstable Town, Massachusetts.

Median indexed hardness

33PPM

3 indexed ZIPs

Range 31.8–32.8 PPM

State comparison
16 PPM below
State hardness rank
#281 of 302
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Barnstable Town has 3 published ZIP profiles across Barnstable County. The indexed median is 33 PPM, compared with 49 PPM across Massachusetts.

Among the 302 Massachusettscities with an indexed median, Barnstable Town ranks #281from highest to lowest. Across all 328 state ZIP profiles, available estimates run from 24.3to 128 PPM.

The 31.8–32.8 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft3 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
5.6 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 3Low: 0

Observation window: May 16, 2016 to Sep 25, 2023.

ZIP directory

Water reports in Barnstable Town

Open a ZIP for site-level provenance and measurements.

ZIP code

02601

Soft

31.8 PPM

Nearest site
11.2 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

02635

Soft

32.8 PPM

Nearest site
3.4 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

02655

Soft

32.5 PPM

Nearest site
5.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Hyannis Water System, Town Of Barnstable

PWSID MA4020004

Groundwater
System population served
35,000
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Barnstable Fire District

PWSID MA4020000

Groundwater
System population served
5,400
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Cotuit Fire District Water Department

PWSID MA4020003

Groundwater
System population served
4,938
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Centerville Osterville Marstons Mills Wd

PWSID MA4020002

Groundwater
System population served
50,000
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
NitrateMA4020002Apr 1, 2024Archived

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Barnstable Town

Is the water hard?

The indexed city median is 33 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.