Evaluation of the Water Quality of the Tigris River South of Mosul Using the National Foundation for Health's Water Quality Index NSF-WQI
Year: 2026
Type: article
Abstract: This study assessed water quality in the Tigris River, specifically in the southern region of Mosul, using the Water Quality Index (WQI) developed by the National Sanitation Foundation (NSF) in the United States. Four key monitoring sites were selected along the river course—ranging from Hammam Al-Alil in the north to Al-Qayyarah in the south—and water samples were collected monthly from February 2024 through January 2025. The evaluation involved a comprehensive analysis of physical, chemical, and bacteriological indicators, including water temperature (°C), pH level, total dissolved solids (TDS), turbidity (NTU), dissolved oxygen (DO), biological oxygen demand over five days (BOD₅), nitrate (NO₃⁻), phosphate (PO₄³⁻), and fecal coliform concentrations (CFU/100 mL). The WQI values at the four sites were 73.34 at Hammam Al-Alil, 75.11 at Al-Safina, 76.99 at Al-Houd, and 73.93 at Al-Qayyarah. According to the NSF classification scale, these values correspond to category B, indicating that water quality at all sampled sites is “good.”
Source: Tikrit Journal of Pure Science
Authors: Mohamed Oliman Khalaf, Ibrahim Omar Saeed
Institution: University of Tikrit
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7204199914