University of Vermont,

Arguments Supporting a PWC (jet ski)Ban

Accidents:

Personal watercrafts have high accident and fatality rates. As noted earlier, PWCs are involved in 35 percent of all accidents with water vessels. The number of accidents and fatalities due to PWC use has been increasing consistently with each year since 1987 (see Table 1).

Pollution:

Widespread PWC use has a significant impact on the environment due to the two stroke engines which leak millions of gallons of unburned fuel into the waters each year (Pearce, 1998). Scientists estimate that 20 to 25 percent of the fuel used in personal watercraft and other watercraft with two stroke engines fail to combust, and is flushed out into the water as raw fuel vapor emissions (Pearce, 1998).

To illustrate the level of pollution, in Michigan, the 82,000 registered watercraft, if each rider expends a full 10-gallon tank, will expend more than 200,000 gallons of fuel into the water. If a watercraft carries four gallons of gas, than approximately one gallon will be directly leaked into the water (Pearce, 1998). Two hours of exhaust emissions from a Jet Ski is equivalent to the emissions created by driving a 1998 automobile 130,000 miles (Stienstra, 1998).

Biological Impact: The pollution emitted from PWCs have a considerable impact on wildlife. When the unburned fuel is released into the water, tiny organisms absorb the chemicals and become extremely sensitive to light, an occurrence called phototoxicity. The Daylight sun then kills the organism, which causes a collapse of the food chain as food sources slowly become eliminated (Pearce, 1998).
http://www.uvm.edu/~vlrs/doc/personal_watercraft.htm