Gravimetric method (TSS)

Always follow the protocol for collecting samples given to you by the lab. This is a general explanation of the gravimetric method.

The gravimetric method is a simple and accurate way to measure Total Suspended Solids (TSS) in water. First, a known volume of the water sample is poured through a special filter that catches the solid particles. The filter is then carefully dried in an oven to remove all moisture. Once it’s dry, the filter is weighed. The increase in weight shows how much solid material was in the water. The result is reported in milligrams of solids per litre of water (mg/L).

A high TSS level can mean too much sediment or pollution, which can harm aquatic life and affect water clarity.