Clarity refers to light transmission through water (water clarity) and has two important aspects: visual clarity and light penetration. Visual clarity indicates how much sediment or runoff is in the water. Sediment can come from road runoff during rain, or from slips or bank erosion. As well as making the water unsuitable for drinking by stock, murky water can also make areas unsafe for swimming and can harm aquatic life. Light penetration is also important as it controls light availability for growth of aquatic plants. Water clarity is measured by Black Disc and Turbidity monitoring as part of your council’s State of the Environment monitoring.

View a factsheet on Water Clarity