Abstract: An effluent sampler includes an effluent collection container mounted accessibly within an effluent conduit and a dipper for periodically and automatically sampling the effluent stream. A collecting cup associated with the container collects a portion of the cumulative sample for an analysis thereof. The collection container is shaped to fit within an aperture of the effluent conduit and extends both inside and outside the conduit. The dipper is mounted to the container inside the conduit for protection thereof and the collecting cup associated with the container is attached outside the conduit for access to the cumulative sample. The sampler includes a compressed air system for clearing the dipper and a second compressed air system for intermixing the cumulative sample therewithin. For collecting effluent, a collecting head is attached to the dipper.