Because of a lack of well data not much is known about potential aquifers in this area. Rock units that may produce useable quantities of water in the sub-basin include the Supai Formation, Redwall Limestone, Coconino Sandstone, and the undivided sandstones. These units are producing aquifers in the Plateau uplands province, and potentially could provide useable quantities of water within the sub-basin. However, the eastern part of the sub-basin is covered with volcanics. Groundwater occurs in the various volcanic flows in cinder beds, weathered zones, and fracture zones.
Water is produced from seeps, springs, and shallow, low-yield wells.
The Black River sub-basin is almost entirely covered by volcanics. Water is available from low-yield wells, springs, and seeps. The few wells completed in these basalts are widely scattered and used for stock and domestic consumption.