Barnstable Town
MA

Is Barnstable Town, MA Tap Water Safe to Drink?

Barnstable Town tap water meets federal Safe Drinking Water Act standards but 7 of 8 ZIP codes show detections above EPA health guidelines, primarily for PFBS. A certified filter is recommended for households that want an additional layer of protection.

4Water systems
8ZIP codes
87.5%ZIPs above EPA guideline
Metro areaBarnstable Town, MA
Latest data2025-10-01

Where Does Barnstable Town Get Its Water?

Water in Barnstable Town, MA is provided by 4 public water systems: COTUIT FIRE DISTRICT WATER DEPARTMENT, HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE, BARNSTABLE FIRE DISTRICT and CENTERVILLE OSTERVILLE MARSTONS MILLS WD.

How Is Barnstable Town Tap Water Treated?

Treated water is disinfected using free chlorine. Treatment includes air stripping, direct filtration, granular activated carbon filtration and groundwater disinfection.

What's in Barnstable Town Tap Water?

The following contaminants were detected most frequently in Barnstable Town public water systems. 7 of 8 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
PFBS 0.0103 µg/L 0.003 µg/L 4 ZIPs Above guideline
PFPeA 0.0187 µg/L 0.003 µg/L 3 ZIPs Above guideline
lithium 9 µg/L — 0 ZIPs Within guideline
PFBA 0.0093 µg/L — 1 ZIP Within guideline
PFOS 0.0071 µg/L — 3 ZIPs Within guideline

Health Risk Profile for Barnstable Town

Based on EPA monitoring data, 7 of 8 ZIP codes in Barnstable Town have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Broad-Spectrum Filters for This Water Profile

This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about Barnstable Town Tap Water

Is Barnstable Town tap water safe to drink?

Barnstable Town tap water meets Safe Drinking Water Act requirements but 7 of 8 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in Barnstable Town tap water?

The most commonly detected contaminants in Barnstable Town water systems include: PFBS, PFPeA, lithium. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Barnstable Town get its drinking water?

Barnstable Town receives water from 4 public water systems, including COTUIT FIRE DISTRICT WATER DEPARTMENT.

Do I need a water filter in Barnstable Town?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is Barnstable Town tap water tested?

Public water systems in Barnstable Town are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2025-10-01.

Tap water reports by ZIP in Barnstable Town

Water utilities serving Barnstable Town, MA

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

Also covers / overlaps with