West Islip, NY: 2 Violations — 74/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Residents of West Islip generally live with tap water that beats the NY safety average on key EPA compliance metrics.
How West Islip Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About West Islip Water
- Your city's water systems recorded 2 violations in the past 5 years.
- Average lead level: 0.003 mg/L.
- Homes built before 1986: 90% — older plumbing may contain lead solder.
- Estimated remediation: $2,400 per household.
- CDC health risk index: 11.13.
Who Supplies Your Water in West Islip
Federal records list 2 water systems tied to West Islip, NY. Of those, 2 are the primary providers, meaning service conditions, rate structures, and compliance histories can differ depending on where a property sits.
Overview
We track water quality and home safety data for 1 ZIP code in West Islip, New York (population ~25,063), covering 2 community water systems serving approximately 1,100,040 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for West Islip: 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
West Islip water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0030 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 2428 | Other | 2 | 1 |
| Stage 1 DBP Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 11795 | B | 2 | 0 | SUFFOLK COUNTY WATER AUTHORITY |
All ZIP Codes in West Islip
- 11795 [B] — 2 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.
Health Outcomes in West Islip
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
Top Contaminants in West Islip Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in West Islip
With 90% 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
Pre-1986 plumbing is not a rare legacy case in West Islip — it's the dominant profile. The median build year of 1968 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in West Islip 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 West Islip Homeowners
For most homeowners in West Islip, the estimated cost of water and safety remediation represents a proportionally modest share of what properties are worth — placing this area in the lower tier of the remediation share scale.
Remediation costs in West Islip are relatively low compared to home values. The $1,600–$3,300 estimated range is a small fraction of median property value. Home values are 65% above the New York average.
Lead Exposure Risk for Children in West Islip
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.
Older interior plumbing shapes the local picture: 90% of West Islip homes predate the federal solder ban, and aggregate sampling either approaches or crosses the action benchmark. That mix makes a single-home draw a standard pre-purchase or pre-occupancy step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in West Islip
West Islip's flood profile — 1533 NFIP claims over the program's multi-decade period and 100% of ZIP codes within FEMA-designated flood zones — reflects a community where flooding has shaped the local risk landscape in sustained ways. That sustained exposure has specific consequences for water quality that don't apply to lower-exposure areas. Treatment facilities handling intake from flood-saturated watersheds face contaminant loads that can exceed normal filtration capacity. Private wells in FEMA-designated zones face surface infiltration risk during every significant event. Distribution systems in areas that flood repeatedly accumulate backflow stress over time. None of these represent constant threats to water quality, but they are activated by the kinds of events that the NFIP record shows have occurred here, repeatedly, over many years.
West Islip has a significant flood history with 1,533 FEMA flood insurance claims on record, averaging $40,906 per claim. With 100% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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.
Deep Dive Reports
Detailed analysis for West Islip, NY