Stamford, CT: 19 Health Violations — 64/100 (2026)
19 ZIP codes · 6 water systems · Updated 2026-06-03
Stamford, CT: middle-tier water safety by the latest federal monitoring.
How Stamford Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Stamford, CT
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
How ZIP codes in Stamford score across all safety grades.
What You Should Know About Stamford Water
- Your city's water systems recorded 760 violations in the past 5 years.
- Average lead level: 0.002 mg/L.
- Estimated remediation: $2,195 per household.
Who Supplies Your Water in Stamford
Federal records list 6 water systems tied to Stamford, CT. Of those, 3 are the primary providers, meaning service conditions, rate structures, and compliance histories can differ depending on where a property sits.
Overview
We track water quality and home safety data for 19 ZIP codes in Stamford, Connecticut (population ~135,720), covering 6 community water systems serving approximately 352,348 people region-wide.
19 of 19 ZIP codes (100%) have recorded EPA violations. 19 health-based violations documented.
Home Safety Score
Average Home Safety Score for Stamford: C (64/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Stamford water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 19 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.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 200 | 19 |
| Stage 1 DBP Rule | Treatment Technique | 100 | 19 |
| Lead and Copper Rule | Treatment Technique | 100 | 19 |
| Contaminant 1017 | Other | 80 | 19 |
| Nickel | Inorganic | 80 | 19 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 06901 | C | 40 | 1 | AQUARION-EASTERN FAIRFIELD COUNTY |
| 06902 | D | 40 | 1 | AQUARION-EASTERN FAIRFIELD COUNTY |
| 06903 | C | 40 | 1 | AQUARION-EASTERN FAIRFIELD COUNTY |
| 06904 | C | 40 | 1 | Candle Hill Mobile Home Park |
| 06905 | C | 40 | 1 | AQUARION-EASTERN FAIRFIELD COUNTY |
| 06906 | C | 40 | 1 | AQUARION-EASTERN FAIRFIELD COUNTY |
| 06907 | C | 40 | 1 | AQUARION-EASTERN FAIRFIELD COUNTY |
| 06910 | C | 40 | 1 | Candle Hill Mobile Home Park |
| 06911 | C | 40 | 1 | Candle Hill Mobile Home Park |
| 06912 | C | 40 | 1 | Candle Hill Mobile Home Park |
All ZIP Codes in Stamford
- 06901 [C] — 40 violations ⚠
- 06902 [D] — 40 violations ⚠
- 06903 [C] — 40 violations ⚠
- 06904 [C] — 40 violations ⚠
- 06905 [C] — 40 violations ⚠
- 06906 [C] — 40 violations ⚠
- 06907 [C] — 40 violations ⚠
- 06910 [C] — 40 violations ⚠
- 06911 [C] — 40 violations ⚠
- 06912 [C] — 40 violations ⚠
- 06913 [C] — 40 violations ⚠
- 06914 [C] — 40 violations ⚠
- 06920 [C] — 40 violations ⚠
- 06921 [C] — 40 violations ⚠
- 06922 [C] — 40 violations ⚠
- 06925 [C] — 40 violations ⚠
- 06926 [C] — 40 violations ⚠
- 06927 [C] — 40 violations ⚠
- 06928 [C] — 40 violations ⚠
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
Updated daily.
Top Contaminants in Stamford Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Cost Context: What Remediation Means for Stamford Homeowners
Across Stamford, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.
Remediation costs in Stamford are relatively low compared to home values. The $1,413–$3,084 estimated range is a small fraction of median property value. Home values are 41% above the Connecticut average.
Lead Exposure Risk for Children in Stamford
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Stamford appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Stamford
Flood claims in Stamford number 1169 under the NFIP, and 37% of ZIP codes fall within FEMA-designated zones — together reflecting a community where flooding is a recurring, significant feature of the local risk environment with direct implications for periodic water supply safety.
Stamford has a significant flood history with 1,169 FEMA flood insurance claims on record, averaging $22,131 per claim. With 37% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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. Flood damage can add significantly to the estimated <strong>$2,195</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Stamford
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Consumer Confidence Report Rule can reduce the most common contaminant found in Stamford's water.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Stamford, CT