Why ECO: What Are Permeable Pavers?

How EP Henry ECO Permeable Pavers Work: A Basic Overview

Eco Pavers

  • A permeable interlocking concrete pavement is comprised of a layer of permeable pavers separated by joints filled with small stones.
  • Water enters the joints between pavers and flows through an "open-graded" base, i.e. crushed stone layers with no small or fine particles.
  • The void spaces among the crushed stones allow water infiltrate back into the soil subgrade and be stored in those voids until it can penetrate the soil below.
  • The stones in the joints provide 100% surface permeability while the stone base effectively filters stormwater and reduces pollutants and debris that would otherwise be washed into streams and rivers.

Stormwater: Runoff vs. Natural Filtration

In the process of natural filtration, rainfall soaks into vegetation and is absorbed into the soil, slowly flowing underground. There, it is gradually filtered before rejoining moving bodies of water. This natural filtration cycle helps remove debris and pollutants from the water.




Runoff is stormwater that flows over impervious ground surfaces, created when rain falls on roads, driveways, parking lots, rooftops, and other paved surfaces that don't allow water to soak into the ground. Runoff from impervious surfaces also over-burdens permeable soil surfaces by creating so much runoff that permeable soil cannot absorb it before it rushes into streams and rivers.

These large volumes of water are swiftly carried to nearby streams, lakes, wetlands, and rivers and can cause flooding and erosion, washing away stream banks, destroying important wildlife habitat, and causing silt that harms aquatic life.

Stormwater runoff picks up and carries pollutants that are commonly found on paved surfaces such as sediment, nitrogen, phosphorus, bacteria, oil and grease residues, trash, pesticides, and metals.

These contaminants can originate from a variety of sources, including pet waste, pesticide application, lawn fertilizers, automobiles, and construction sites, and street litter. Researchers have observed that as the amount of paved surfaces in a watershed increases, stream health, and aquatic life declines accordingly.

A Solution: EP Henry ECO Permeable Pavers

Fortunately, the growing awareness of and the need for sustainable environmental practices has fostered the development of technologies designed to lessen the harmful effects of stormwater runoff. A hardscape built with EP Henry ECO Permeable Pavers is a prime example. Once installed, it benefits the environment by reducing the amount of stormwater runoff - along with the accompanying soil erosion and water-born contaminants and pollutants carried with it.