Fig. 1.
Zones of sampling: Giza governorate (a), Kafr El-Sheikh governorate (b) and El-Beheira governorate (c); freshwater (green sign), low-quality water (red sign).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.