Water Quality in Hauppauge, NY (11740)
EPA violation data for public water systems serving ZIP code 11740.
No Health-Based Violations
None of the 3 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are18 monitoring/reporting violations (missed testing deadlines), all resolved.
Better than 77% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
10,127
Population
3
Water Systems
18
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (3)
Suffolk County Water Authority
Greenlawn Water District
All resolvedShirley Plaza
Contaminants Found
A naturally occurring element that can cause cancer and other health effects at high levels.
At high levels, nitrate can cause blue baby syndrome in infants.
Similar to nitrate — harmful to infants at high levels.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Hauppauge (11740) has more violations than 77% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 18, most of which are monitoring/reporting issues.
Water Filter Recommendations
No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.