Katonah, NY: 14 Health Violations — 65/100 (2026)
1 ZIP code · 7 water systems · Updated 2026-06-03
While Katonah avoids NY's lowest safety tiers, a portion of its water systems have logged documented violations.
How Katonah Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Katonah Residents
- Your city's water systems recorded 17 violations in the past 5 years.
- Average lead level: 0.001 mg/L.
- Homes built before 1986: 79% — older plumbing may contain lead solder.
- Estimated remediation: $2,400 per household.
- CDC health risk index: 10.47.
Katonah's Water Providers
3 independent water providers serve Katonah, NY — 7 systems appear in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Katonah, New York, covering 7 community water systems serving approximately 11,010 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 14 health-based violations documented.
Home Safety Score
Average Home Safety Score for Katonah: C (65/100)
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
Katonah water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0010 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Contaminant 2806 | Other | 28 | 1 |
| Copper | Inorganic | 2 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 2 | 1 |
| Consumer Confidence Report Rule | Reporting | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 10536 | C | 17 | 14 | Bedford Consolidated W.d. |
All ZIP Codes in Katonah
- 10536 [C] — 17 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.
Katonah Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Katonah's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Katonah Infrastructure Age
With 79% 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
Because the majority of Katonah's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1965 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in Katonah 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.
How Remediation Costs Compare in Katonah
What does remediation cost in financial context for Katonah homeowners? Proportionally very little — the equity share here is low, and addressing documented issues is a manageable planning question rather than a material financial burden.
Remediation costs in Katonah are relatively low compared to home values. The $1,500–$4,100 estimated range is a small fraction of median property value. Home values are 136% above the New York average.
Katonah: Lead Risk & Vulnerable Populations
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.
Routinely in Katonah, where 79% of housing predates the solder ban and aggregate utility readings hover near the federal threshold, a faucet-level draw functions as a standard household step for families with small kids.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Katonah: Flood History & Water Damage Risk
Flood risk in Katonah occupies the middle ground: 29 NFIP claims and 100% of local ZIP codes within FEMA flood zones. At that level, the risk pathways connecting flooding to water quality — treatment system stress, well infiltration, distribution backflow — become relevant considerations during significant flood events, even if day-to-day water quality is unaffected by flood history.
Katonah has a moderate flood history with 29 FEMA claims averaging $2,748 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>$2,400</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 Katonah
- 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 Contaminant 2806 can reduce the most common contaminant found in Katonah's water.
- Check your home's plumbing. With 79% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Katonah, NY