Trench drains that discharge into bioswales, storm drain systems, and sewer networks are required to intercept and filter out hydrocarbons before they enter the watershed. These drains commonly collect runoff from driveways, storage yards, distribution centers, parking lots, and high‑traffic entry and exit points—all areas where oil, diesel fuel, oil sheen, and other hydrocarbons originate.

Because trench drains are primary collection points for these pollutants, hydrocarbon trench drain filters should be standard practice for preventing contaminated runoff from reaching downstream systems. Installing a single 6‑foot trench drain filter can reduce hydrocarbon pollution significantly—preventing up to 50% of street‑level oil from entering the storm drain network.

Effective trench drain filtration not only protects the environment but also supports compliance with local and state stormwater regulations, especially in regions with strict environmental standards.