Larchmont, NY: 4 Violations - Home Safety 99/100
1 ZIP code · 3 water systems · Updated
ZipCheckup grade for Larchmont: A.
Checked records flag no major concern; missing data is unknown.
Larchmont, NY scores in the upper band of the ZipCheckup grade.
How Larchmont Compares
Data: EPA SDWIS
Larchmont Water: The Quick Version
- Your city's water systems recorded 4 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0122 mg/L.
- Homes built before 1986: 91% - older plumbing may contain lead solder.
- Health risk index (ZipCheckup composite of CDC data): 10.47.
Water Systems Serving Larchmont
Federal records list 3 water systems tied to Larchmont, NY. Of those, 3 are the primary providers, meaning service conditions, rate structures, and compliance histories can differ depending on where a property sits.
- A
- A
- A
Overview
We track home safety data for 1 ZIP code in Larchmont, New York (population ~17,709), covering 3 community water systems serving approximately 212,846 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. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Larchmont: A (99/100)
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
Larchmont water systems draw from: Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0122 mg/L (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 3.
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 |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 4 | 1 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 10538 | A | 4 | 0 | Westchester Joint Water Works |
All ZIP Codes in Larchmont
- 10538 [A] - 4 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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Larchmont
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Larchmont
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Larchmont's Housing Stock?
With 91% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Renovation history matters as much as age: in Larchmont, with a median build year of 1901, some older homes have been replumbed and some have not.
Over half of homes in Larchmont were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Protecting Children from Lead in Larchmont
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.
Several steps can clarify lead exposure for a Larchmont household. The area figure, an average of ZIP-level 90th-percentile results, is 0.010 mg/L or higher, and the pre-1986 share of local homes is about 91%. The water utility's lead service line inventory shows how a home's service line is classified, a certified laboratory test measures lead at the tap, and a filter certified to NSF/ANSI 53 for lead reduction is an option where results show lead.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Larchmont
Historical NFIP data for Larchmont contains 866 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $21,106. Among ZIP codes with claim records, 100% 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.
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.
Deep Dive Reports
Detailed analysis for Larchmont, NY