Water Quality in Merrick, NY (11557)
EPA violation data for public water systems serving ZIP code 11557.
Past Health-Based Violations
6 health-based violations were found in the past 5 years, meaning contaminant levels exceeded federal safety limits. All have since been resolved. There are also 30 monitoring/reporting violations.
More violations than 87% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
8,504
Population
5
Water Systems
36
Violations (5yr)
6
Health-Based
Location
Loading map...
Water Systems Serving This Area (5)
Liberty Utilities New York - Lynbrook
3 health-basedLiberty Utilities New York - Merrick
3 health-basedWa Of Western Nassau
Town Of Hempstead Water Department
Heritage Plaza
All resolvedContaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Merrick (11557) has more violations than 87% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 36.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.