Although conditions vary by service area, New Haven's water systems collectively show below-average compliance within CT - health-based violations are documented throughout the city, and the overall grade reflects a pattern rather than isolated incidents.

Data: EPA SDWIS

Water Quality Map: New Haven, CT

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Overview

We track home safety data for 26 ZIP codes in New Haven, Connecticut (population ~131,106), covering 1 community water system serving approximately 418,900 people region-wide. The EPA snapshots used for this build directly map water systems to 5 of 26 ZIP codes.

The available EPA record reports 0 violations for 5 ZIP codes with a reported violation count.

Home Safety Score

Average Home Safety Score for New Haven: D (50/100)

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

New Haven water systems draw from: Surface water.

Lead & Copper

• Average lead level (90th percentile): 0.0000 mg/L (EPA action level: 0.015 mg/L)
• 0 of 5 ZIP codes with known status exceed the EPA lead action level

Radon Risk

Dominant radon zone: Zone 1 (High Risk)

• Zone 1 (High): 26 ZIP codes
• Zone 2 (Moderate): 0 ZIP codes
• Zone 3 (Low): 0 ZIP codes

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

Areas with No Violations

All ZIP Codes in New Haven

• 06501
• 06502
• 06503
• 06504
• 06505
• 06506
• 06507
• 06508
• 06509
• 06510 [D]
• 06511 [D]
• 06513 [D]
• 06515 [D]
• 06519 [D]
• 06520
• 06521
• 06530
• 06531
• 06532
• 06533
• 06534
• 06535
• 06536
• 06537
• 06538
• 06540

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Lead/copper: EPA Lead and Copper Rule sampling data
• Radon: EPA Map of Radon Zones

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

New Haven: Remediation Cost in Perspective

At current valuations, New Haven sits in the low remediation-share tier - the equity impact of fixing documented issues is proportionally minor.

Median Home Value

$284,200

Est. Remediation

$2,427

Remediation as % of home value 0.9%

Remediation costs in New Haven are relatively low compared to home values. The $1,623–$3,242 estimated range is a small fraction of median property value. Home values are 30% below the Connecticut average.

Historical Flood-Claim Evidence for New Haven

235

Total FEMA Flood Claims

$18,720

Avg Reported Sum With Payment Data

82%

A/V Share of Claim-Record ZIPs

Historical NFIP data for New Haven contains 235 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $18,720. Among ZIP codes with claim records, 82% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The <strong>$2,427</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.