Abstract: A modular subsurface sewage disposal and wastewater treatment system is presented for treating effluent from a septic tank. The system includes an elongated member, leach field medium and at least one pipe. The elongated member is arranged in one of a serpentine or a ladder-shaped configuration and includes a core wrapped in a fabric. The medium is disposed about open areas in the configuration. The pipe uniformly distributes effluent from the septic tank to the elongated member. In one embodiment, the core is a pliable plastic membrane and the fabric wrap is a non-woven fabric. In one embodiment, the elongated member is disposed in a box and retained by an adhesive to permit ease of manufacture, shipping, and installation. In another embodiment, the elongated member is disposed in a rigid or semi-rigid frame defining channels retaining the elongated member. The frame is detectable by a non-invasive above surface detector.