Diamond Woods Estates Mhp
EPA ID: NY4121420 · 150 people served · 9 ZIP codes
EPA data: Diamond Woods Estates Mhp — zero violations, five years, 150 served.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Demographics
The Diamond Woods Estates Mhp serves a community with a median household income of $145,432 and an estimated 131,959 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Diamond Woods Estates Mhp'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 Suffolk 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 80th 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. 70 detections recorded. 21 exceed federal EPA limits (4 ppt for PFOA/PFOS). 7 exceed 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
DIAMOND WOODS ESTATES MHP (EPA ID: NY4121420) is a community water system in New York that serves approximately 150 people from groundwater sources.
This system provides water to 9 ZIP codes across 8 communities.
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
- 11720 — Centereach
- 11733 — East Setauket
- 11764 — Miller Place
- 11766 — Mount Sinai
- 11776 — Port Jefferson Station
- 11777 — Port Jefferson
- 11789 — Sound Beach
- 11790 — Stony Brook
- 11794 — Stony Brook
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Diamond Woods Estates Mhp (NY4121420) on EPA.gov.
Frequently Asked Questions
Is Diamond Woods Estates Mhp water safe to drink?
Based on EPA records, Diamond Woods Estates Mhp has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Diamond Woods Estates Mhp serve?
Diamond Woods Estates Mhp serves approximately 150 people across 9 ZIP codes in New York.
Where does Diamond Woods Estates Mhp 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.