Weight-measurement retrofitting for waste compactors

A weight-measurement system for inclusion or use with a waste container includes scale devices in communication with a remote computer via a communications module. In some embodiments, the scale devices are mounted to a wheeled base frame that is integral with and supports the waste container. In other embodiments, the scale devices are mounted to a stationary base frame upon which a conventional waste container is retrofittingly positioned and supported during use. The scale devices can be provided by load cells, for example load-pin load cells used as axles for wheels of the integral base frame or as axles for rollers of the retrofit stationary base frame. The remote computer can be programmed to receive weight data from the scale devices, via the communications module, determine the actual weight of the waste contained in the waste container, and provide pre-defined weight-based notifications.