What things affect water quality?

Water quality is influenced by various factors, including physical, chemical, and biological elements. Pollutants such as agricultural runoff, industrial discharges, and wastewater can introduce harmful substances, affecting pH, turbidity, and nutrient levels. Natural factors like sedimentation, temperature, and the presence of microorganisms also play a crucial role. Additionally, human activities, land use changes, and climate variations can further impact water quality.