The sewage treatment plant of Panajachel suffered severe damage during the storm. Fortunately, the main part of the treatment plant is untouched. These are the primary treatment structures and the up-flow anaerobic bio-digesters. The post-treatment components were lost, such as the percolating filters and final sedimentation tanks. The laboratory of water quality and the data records of the operation of the plant were lost together with the design blue-prints. There were also losses in segments of the sewage pipeline network, including the connection, across the river, to the treatment plant, necessary to clean sixty percent of the waste-water produced by Panajachel.

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