ZIP Code Lookup

Water quality in ZIP 11550

HEMPSTEAD (T), New York · 5 utilities serving 641,000 residents

Utilities serving this ZIP

Click any utility for full water quality details, contaminant testing data, treatment plant contact information, and recommended filters.

C
72/100

LIBERTY UTILITIES NEW YORK - MERRICK

Serves 135,000 residents · HEMPSTEAD (T), NY

  • PFAS contamination
  • Perfluoroundecanoic acid (PFUnA) significantly above health guideline
View full report →
C
68/100

TOWN OF HEMPSTEAD WATER DEPARTMENT

Serves 110,000 residents · HEMPSTEAD (T), NY

  • PFAS contamination
  • Nitrate significantly above health guideline
  • Nitrate and nitrite significantly above health guideline
View full report →
D
62/100

HEMPSTEAD (V)

Serves 56,000 residents · HEMPSTEAD (V), NY

  • PFAS contamination
  • Perfluorohexane sulfonate (PFHXS) significantly above health guideline
  • Radium, combined (-226 and -228) significantly above health guideline
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F
53/100

LIBERTY UTILITIES NEW YORK - LYNBROOK

Serves 220,000 residents · HEMPSTEAD (T), NY

  • PFAS contamination
  • Perfluorohexane sulfonate (PFHXS) significantly above health guideline
  • Arsenic significantly above health guideline
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F
49/100

WA OF WESTERN NASSAU

Serves 120,000 residents · HEMPSTEAD (T), NY

  • PFAS contamination
  • Perfluorohexane sulfonate (PFHXS) significantly above health guideline
  • Haloacetic acids (HAA9) significantly above health guideline
View full report →

Wondering what's in your water?

Every utility above publishes an annual Consumer Confidence Report (CCR) listing contaminants found in your water. Click any utility to see:

  • Detected contaminants and how they compare to health guidelines
  • Treatment plant contact information and water quality officer
  • Recent SDWA violations and resolution status
  • Filter recommendations matched to your specific water profile

Read our water safety guides →