Total Suspended Solids (gravimetric)

Reports the direct gravimetric mass of suspended particles, found by filtering a known volume through a pre-weighed glass fiber filter, drying at 103 to 105 C, and reweighing.

$$\text{TSS}=\frac{m_{final}-m_{initial}}{V_{sample}}$$

Variables

Symbol	Meaning	Unit
$\text{TSS}$	total suspended solids	mg/L
$m_{final}$	dried filter mass after filtration	mg
$m_{initial}$	pre-weighed filter mass	mg
$V_{sample}$	filtered sample volume (typically 1 L)	L

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Part of The Blueprint of Water