All these drainages are part of the Mississippi River Watershed. The lake lies within the watershed of Malibu Creek. The pilot program aimed to restore the 54,000-acre Mill Creek watershed. Tacoma Water provides customers in its service area with water from the Green River Watershed. To the north, mostly in British Columbia, the Columbia watershed borders the Fraser River watershed. Dover lies fully within the Piscataqua River (Coastal) watershed. Exeter lies fully within the Piscataqua River (Coastal) watershed. Most of Fremont is part of the Laguna Creek Watershed. Draining a large watershed of , the reservoir's capacity is . This is a result of the underdeveloped soils found in its relatively small watershed. These mountains supply 90% of the water used for irrigation within the watershed. Approximately 31% of the land use within the watershed is cropland. A dam produces negative effects that continue down the watershed. Fracking is also cause for concern regarding water quality within the Brazos Watershed. The PMP is the largest precipitation thought to be physically possible in the upstream watershed.