Slot canyons, water pockets, and beach areas with warm pools of water cut off from flowing water or the reservoir can be hotspots for E.coli from wildlife, visitors, or other sources. Sandy areas and water frequently used by wildlife such as geese, gulls, ducks, ravens, herons, coyotes, rabbits, and desert bighorn sheep can harbor E.coli. All rental houseboats are now outfitted to not allow illegal dumping. Illegal dumping of septic tanks from private houseboats and larger recreational boats with bathrooms. Headwaters of the many canyons along the lake (that are experiencing snow melt, rainwater runoff, or intense monsoonal storms coming from the plateaus and mountains) can pick up E.coli from livestock and wildlife waste and transport it to the reservoir.įrequently visited areas (Antelope Canyon, areas near Lone Rock, popular house boat and accessible shoreline beaches, etc.) where visitors fail to use portable toilets, wag bags or other approved waste disposal methods.
Rising reservoir waters that come in contact with previously deposited human waste, pet waste, and livestock manure. High visitation at beaches, at popular houseboat sites, and at other frequently visited areas. With 96 side canyons, nearly 2,000 miles of shoreline, high summer temperatures, and fluctuating reservoir levels, its waters experience a wide range of water quality conditions.Ī number of conditions can cause potential water quality issues, including elevated E.coli counts, on Lake Powell, at Lees Ferry, and on Colorado River tributaries. Lake Powell is one of the largest man-made reservoirs in the U.S.A.
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