Water

A genuinely thin, emerging vendor market for filtering microplastic fibers and particles out of wastewater at the household, municipal, and industrial scale — three confirmed dedicated vendors, no confirmed Chinese producer as of 2026.

In-situ and lab-based instruments purpose-built to detect cyanobacteria and their toxins in surface and drinking water — phycocyanin-fluorescence probes for continuous cyanobacteria cell-count monitoring and ELISA test kits for quantifying microcystins and nodularins — sold by four specialist manufacturers (bbe Moldaenke, Turner Designs, Abraxis/SDIX, WizSensor) as a distinct product category from general water-quality parameter sensors (turbidity, TOC, dissolved oxygen).

Engineered soil-media and plant-based bioretention systems — compact, prefabricated cells installed at curb-side inlets, parking lots and roadways — that filter sediment, nutrients and metals out of urban stormwater runoff before it reaches waterways, sold as manufactured units by dedicated stormwater-treatment producers (Contech, Convergent Water Technologies, Zenebio, Imbrium Systems, Hydro International).