Mount Fuji
EPA ID: NY4320531 · 282 people served · 1 ZIP code
Zero violations in five consecutive years of EPA monitoring — Mount Fuji has held a clean track record across every reporting cycle in that span, with no enforcement activity of any kind on file for the full service population of 282 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 1 (2023) to 1 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Mount Fuji Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Mount Fuji serves a community with a median household income of $81,406 and an estimated 1,170 residents across its service area. Approximately 86% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Mount Fuji's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in Rockland County, New York rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 10 detections recorded. 2 exceed federal EPA limits (4 ppt for PFOA/PFOS). 1 exceeds state limits.
Comparable Water Systems
Similar-sized systems in New York
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Mount Fuji (EPA ID: NY4320531) is a community water system in New York that serves approximately 282 people from groundwater sources.
This system serves ZIP code 10931 in Hillburn.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by NY or modeled from parcel and building-footprint data.
- 10931 — Hillburn
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Mount Fuji (NY4320531) on EPA.gov.
Frequently Asked Questions
Is Mount Fuji water safe to drink?
Based on EPA records, Mount Fuji has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Mount Fuji serve?
Mount Fuji serves approximately 282 people across 1 ZIP code in New York.
Where does Mount Fuji get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.