Stormwater filtration is an essential component of urban runoff management. Filtration can improve water quality by removing suspended solids and pollutants which helps meet TSS removal targets and maintain watershed health. Filtration is the process by which stormwater [[Runoff volume control targets|runoff]] is conveyed through a medium to remove solid particles and associated pollutants. Stormwater passes through a filter based on the pressure difference on either side of the filter. In most stormwater treatment applications, the pressure difference is created by gravity (or hydraulic head).
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Stormwater filtration is a key element of urban runoff management, helping to improve water quality by removing suspended solids and associated pollutants. Filtration can help achieve total suspended solids (TSS) removal targets and contributes to overall watershed health. Filtration works by conveying stormwater through a filter medium that captures solid particles and pollutants. In most stormwater treatment systems, water is driven through the filter by a pressure difference created by gravity or hydraulic head.