Holliston Water Department

ZipCheckup's reading of EPA SDWIS for Holliston Water Department (MA2136000): 2 unresolved EPA violations on record. Looking at the EPA enforcement file for Holliston Water Department, 2 violations are listed as unresolved - those findings cover the utility's service area of approximately 15,139 people and remain open in the federal compliance system, awaiting formal corrective action documentation.

Data: EPA SDWIS

System Overview

Holliston Water Department (EPA ID: MA2136000) is a community water system in Massachusetts that serves approximately 15,139 people from groundwater sources.

This system serves ZIP code 01746 in Holliston.

ZIP-Area Home Safety Context: F (37/100)

This is the average Home Safety Score for 1 of 1 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.

Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.

Violation History

Status breakdown for accepted records with record years 2021-2026: 30 resolved, 0 archived, 2 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.

Recent Violations

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.

Radon Risk in Service Area

Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by MA or modeled from parcel and building-footprint data.

• 01746 - Holliston

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Holliston Water Department (MA2136000) on EPA.gov.

Frequently Asked Questions

Is Holliston Water Department water safe to drink?

The accepted 2026Q2 ECHO snapshot shows 2 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.

How many people does Holliston Water Department serve?

Holliston Water Department serves approximately 15,139 people across 1 ZIP code in Massachusetts.

Where does Holliston Water Department get its water?

The primary water source is groundwater.

@misc{zipcheckup-water-system-ma2136000,
  author = {{ZipCheckup}},
  title  = {{Holliston Water Department (MA): 32 EPA Violations}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/ma2136000/}
}