Thompson, CT: 3 Health Violations — 74/100 (2026)
1 ZIP code · 5 water systems · Updated 2026-06-03
Based on current monitoring, Thompson holds an above-average drinking water safety record for CT — violations are infrequent and typically minor when they do appear.
How Thompson Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Thompson Water
- Your city's water systems recorded 10 violations in the past 5 years.
- Average lead level: 0.0011 mg/L.
- Homes built before 1986: 73% — older plumbing may contain lead solder.
- Estimated remediation: $2,800 per household.
Who Supplies Your Water in Thompson
Multiple utilities divide Thompson, CT's water service — 3 leading providers among 5 on the federal register.
Overview
We track water quality and home safety data for 1 ZIP code in Thompson, Connecticut, covering 5 community water systems serving approximately 4,023 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 3 health-based violations documented.
Home Safety Score
Average Home Safety Score for Thompson: B (74/100)
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
Thompson water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0011 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Technique | 8 | 1 |
| Stage 1 DBP Rule | Treatment Technique | 4 | 1 |
| Lead and Copper Rule | Treatment Technique | 4 | 1 |
| Barium | Inorganic | 2 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 06277 | B | 10 | 3 | Ctwc - Thompson System |
All ZIP Codes in Thompson
- 06277 [B] — 10 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 Thompson Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Thompson
With 73% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
The character of Thompson's housing stock is one of deep historical layering — a median build year of 1977 signals a city built largely before the plumbing era changes of 1986 and 1970. Lead-soldered copper joints and, in the oldest properties, lead service lines are commonly present in this inventory. That context shapes what individual water testing may reveal, particularly in neighborhoods where the oldest housing is concentrated.
Over half of homes in Thompson were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Thompson Homeowners
The equity-to-remediation ratio in Thompson is moderate — worth planning for but within reach for most property owners.
Remediation costs are moderate relative to home values in Thompson. The estimated $1,500–$4,900 range is manageable for most homeowners but still worth budgeting for. Home values are 33% below the Connecticut average.
Lead Exposure Risk for Children in Thompson
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.
73% — that captures the slice of Thompson housing dating from before the federal ban on solder containing lead. It pairs with aggregate utility readings that either approach or cross 0.015 mg/L, the benchmark set under the EPA Lead and Copper Rule. Together, the two figures shift one-home reads into a standard household-level confirmation, particularly for families with kids. A certified lead-removal filter is available through retailer-verified channels if a kit returns results that warrant additional measures.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Thompson
100% of ZIP codes in Thompson are mapped into FEMA-designated flood zones, and the NFIP records 2 claims reflecting a multi-event flood history. That combination places local flood exposure in the range where water-quality implications deserve at least periodic attention.
Thompson has a moderate flood history with 2 FEMA claims averaging $3,904 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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>$2,800</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.
Deep Dive Reports
Detailed analysis for Thompson, CT