CITY REPORT CT HEALTH VIOLATIONS: 3

Mashantucket, CT: 3 Health Violations - Home Safety 47/100

1 ZIP code · 1 water system · Updated

ZipCheckup grade for Mashantucket: D.

Federal records show several conditions worth reviewing.

Your top priority: see the breakdown below and consider a certified water filter. NSF certified filters →

Mashantucket, CT: low grade band.

How Mashantucket Compares

Mashantucket47/100
Connecticut avg63/100
National avg73/100

Data: EPA SDWIS

1
ZIP Codes
1
Water Systems
1
ZIPs Linked to Systems with Violations
D · 47
Avg Safety Score
Zone 1
County Radon Potential (High)
$1,100
Est. Remediation

Key Facts for Mashantucket Residents

  • Your city's water systems recorded 5 violations since 2021.
  • Homes built before 1986: 33% - older plumbing may contain lead solder.
  • Estimated remediation: $1,100 per household.

Mashantucket's Water Providers

Mashantucket, CT: one listed entry, 1 linked overall.

Overview

We track home safety data for 1 ZIP code in Mashantucket, Connecticut (population ~62), covering 1 community water system serving approximately 3,294 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 3 health-based violations appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for Mashantucket: D (47/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor What It Measures
Water Quality EPA violations and compliance history
PFAS MCL Screen UCMR 5 testing against the covered federal MCLs
Radon Risk EPA radon zone classification
Annual AQI EPA AirData county-year median with at least 90 observed days

Water Sources

Mashantucket water systems draw from: Surface water.

Lead & Copper

  • Average of reported 90th-percentile lead results: reported as 0 mg/L (a reported 0 is not proof of no lead; check the source record for its reporting limit) (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status exceed the EPA lead action level

Radon Risk

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.

Top Contaminants

Contaminant Category Violations ZIPs Affected
Total Trihalomethanes (TTHM) Disinfection Byproducts 6 1
Consumer Confidence Rule Reporting 2 1
Public Notice Rule Reporting 2 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
06338 D 5 3 Ledyard Wpca - Ledyard Center

All ZIP Codes in Mashantucket

  • 06338 [D] - 5 violations ⚠

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

What's in Mashantucket's Water?

Total Trihalomethanes (TTHM) 6 violations
Disinfection Byproducts · EPA regulatory level for the contaminant named above: 0.08 mg/L
Increased cancer risk with long-term exposure above the MCL
Consumer Confidence Rule 2 violations
Reporting
Public Notice Rule 2 violations
Reporting

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

Mashantucket Infrastructure Age

1996
Median Build Year
33%
Built Before 1986
20%
Built Before 1970
Copper
Likely Pipe Material

Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.

Source: U.S. Census Bureau American Community Survey (ACS).

Housing Age Profile

1996 is the median build year in Mashantucket, and the age breakdown below shows how much of the housing predates 1986.

1996
Median Year Built
33%
Pre-1986 (lead solder era; lead paint banned 1978)
20%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (20%) 1970–1986 (13%) Post-1986 (67%)

Most homes in Mashantucket were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

Mashantucket: Lead Risk & Vulnerable Populations

33%
Homes Built Before 1986

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

What You Can Do in Mashantucket

  1. Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
  2. Install a certified water filter. For Total Trihalomethanes (TTHM), listed in the water-quality records for Mashantucket: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
  3. Check your home's plumbing. With 33% of homes built before 1986, lead solder is a real possibility.
  4. Review your water system's CCR. If you use a community water system, request its annual Consumer Confidence Report for system-level test results or find it online.

Frequently Asked Questions

What does the Home Safety Score mean for Mashantucket, CT?
Mashantucket has an average Home Safety Score of 47/100 (Grade D) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. 5 violations appear in EPA records for water systems mapped to these ZIP codes. Check individual ZIP code reports for component details.
How many violations are on record for water systems serving Mashantucket?
EPA records list 5 EPA violations, including 3 health-based violations for Mashantucket water systems. These water-system violations are shown for 1 mapped ZIP code.
How does Mashantucket compare to Connecticut average?
Mashantucket has an average Home Safety Score of 47/100, which is below the Connecticut state average of 63/100 for the same model series.
How many water systems serve Mashantucket?
Our records map 1 water system to 1 ZIP code in Mashantucket. The related population figure in our data is approximately 62 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Mashantucket?
Estimated remediation cost per household in Mashantucket: $1,100; modeled range $600 to $2,300. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
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How to cite this page

APA ZipCheckup. (2026). Mashantucket, CT: 3 Health Violations - Home Safety 47/100. https://zipcheckup.com/cities/ct/mashantucket/
BibTeX
@misc{zipcheckup-cities-ct-mashantucket,
  author = {{ZipCheckup}},
  title  = {{Mashantucket, CT: 3 Health Violations - Home Safety 47/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/ct/mashantucket/}
}

Page version: October 2026.

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