Does runoff from roofs or lawns have to be treated for water quality?
Clean roof runoff and runoff from lawns, walkways, patios or decks do not have to be treated for TSS removal. However, these projects must be restricted so that any future change in land use will not result in increased pollutant loads from these impervious areas. If such changes should occur, the applicant must provide the water quality treatment required for that new use.
