Winchester Water Department
EPA ID: MA3344000 · 22,970 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Winchester Water Department (MA3344000): 12 violations on record since 2021. Per the federal file, all 12 violations logged for Winchester Water Department carry a resolved status, and around 22,970 people get water from this system.
Data: EPA SDWIS
Service Area Map
Coverage area for Winchester Water Department Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Winchester Water Department have a median household income of $218,176 and about 22,862 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 81% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Winchester Water Department's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 80th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Massachusetts
System Overview
Winchester Water Department (EPA ID: MA3344000) is a community water system in Massachusetts that serves approximately 22,970 people from surface water sources.
This system serves ZIP code 01890 in Winchester.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 resolved, 12 archived, 0 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
| Date | Contaminant | Type | Status |
|---|---|---|---|
| January 1, 2026 | Fluoride | Non-health-based | Archived |
| January 1, 2026 | Arsenic | Non-health-based | Archived |
| January 1, 2026 | Mercury | Non-health-based | Archived |
| January 1, 2026 | CYANIDE | Non-health-based | Archived |
| January 1, 2026 | Barium | Non-health-based | Archived |
| January 1, 2026 | Cadmium | Non-health-based | Archived |
| January 1, 2026 | Chromium | Non-health-based | Archived |
| January 1, 2026 | Antimony, Total | Non-health-based | Archived |
| January 1, 2026 | Beryllium, Total | Non-health-based | Archived |
| January 1, 2026 | Fluoride | Non-health-based | Archived |
| January 1, 2026 | Thallium, Total | Non-health-based | Archived |
| January 1, 2026 | CYANIDE | Non-health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Arsenic | Monitoring & Reporting | 1 | No |
| Arsenic | Monitoring & Reporting | 1 | No |
| Barium | Monitoring & Reporting | 1 | No |
| Cadmium | Monitoring & Reporting | 1 | No |
| CYANIDE | Monitoring & Reporting | 1 | No |
| Chromium | Monitoring & Reporting | 1 | No |
| Antimony, Total | Monitoring & Reporting | 1 | No |
| Chromium | Monitoring & Reporting | 1 | No |
| CYANIDE | Monitoring & Reporting | 1 | No |
| Antimony, Total | Monitoring & Reporting | 1 | No |
| Beryllium, Total | Other Violation | 1 | No |
| Thallium, Total | Other Violation | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0042 mg/L | No | 2023-12-31 |
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
1 of 1 ZIP records with known zones is in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
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.
- 01890 - Winchester
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Winchester Water Department (MA3344000) on EPA.gov.
Frequently Asked Questions
Is Winchester Water Department water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Winchester Water Department; its 12 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Winchester Water Department serve?
Winchester Water Department serves approximately 22,970 people across 1 ZIP code in Massachusetts.
Where does Winchester Water Department get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: No PFAS Reported Above Reporting Levels
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were reported above UCMR5 minimum reporting levels.
MA enforces a limit of 20 ppt for the combined sum of six PFAS (PFOA, PFOS, PFHxS, PFNA, PFHpA and PFDA). The table shows each compound's highest result, which can come from different samples, so it is not compared with that combined limit; the water system's compliance reports give the combined result.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Winchester Water Department (MA): 12 EPA Violations. https://zipcheckup.com/water-system/ma3344000/
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title = {{Winchester Water Department (MA): 12 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ma3344000/}
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What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Winchester Water Department (EPA ID: MA3344000) - request the latest Consumer Confidence Report or ask about specific contaminants.