The Types segmentation classifies treatment media by functional mechanism, each comprising distinct sub‑types that address specific pollutant classes. Adsorption media include granular activated carbon, polymeric resins, and zeolites, which capture dissolved organics and trace metals through surface interactions. Membrane materials are divided into microfiltration, ultrafiltration, nanofiltration, and reverse osmosis membranes, providing size‑based separation for suspended solids, colloids, and dissolved salts. Chemical precipitation agents encompass lime, soda ash, and coagulant polymers, facilitating bulk removal of metals and phosphates via insoluble compound formation. Biological carriers such as suspended growth media, fixed‑film carriers, and bio‑granules support microbial consortia that biodegrade organic loads. Ion‑exchange resins are categorized into cationic, anionic, and mixed‑bed formats, enabling selective ion removal for hardness control and heavy‑metal remediation. The diversity of these sub‑types expands the market’s technical breadth, allowing end‑users to tailor material portfolios to process demands and regulatory targets, thereby influencing overall market valuation.