PlainWater
Counties → Massachusetts

Nantucket County, Massachusetts

Water Systems
5
Population Served
32,563
Total Violations
347
22 health-based
PFAS Detected
0
of 1 tested

Violation Analysis

100.0%
Systems with Violations
69.4
Avg Violations per System
6.3%
Health-Based Violations

Water Source Types

GW
5 systems (100%)

PFAS Contamination

1
Systems Tested
0
PFAS Detected
0.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Nantucket Massachusetts water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (5)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Wannacomet Water Company 27,703 197 Clean
Siasconset Water Department 3,000 89 -
Surfside Beach 1,500 29 -
Wauwinet House 300 30 -
Sankaty Head Golf Club Inc. 60 2 -

Other Counties in Massachusetts

Suffolk County
8 systems · 3,456,243 served · 111 violations
Middlesex County
204 systems · 1,623,176 served · 16,575 violations
Essex County
67 systems · 908,499 served · 3,080 violations
Norfolk County
57 systems · 842,114 served · 2,645 violations
Worcester County
345 systems · 773,172 served · 23,751 violations
Bristol County
133 systems · 673,471 served · 3,611 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Nantucket County? ▼
Nantucket County has 347 total drinking water violations across 5 water systems, of which 22 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Nantucket County systems? ▼
Water systems in Nantucket County serve approximately 32,563 people through 5 public water systems.
Has PFAS been detected in Nantucket County water? ▼
Of 1 water systems tested for PFAS in Nantucket County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Nantucket County? ▼
Water systems in Nantucket County use GW (5 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 6.3% of Nantucket County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.