s ▁meet ▁this ▁E PA ▁standard , ▁including ▁all ▁four - stroke ▁makes ▁and ▁models ▁and ▁all ▁two - stroke ▁cycle ▁direct - in jection ▁( non - car b ure ted ) ▁models . ▁▁▁ ▁Environment al ▁groups ▁such ▁as ▁the ▁Sur fr ider ▁Foundation ▁and ▁the ▁Blue water ▁Network ▁claim ▁that ▁more ▁rapid ▁progress ▁could ▁be ▁made , ▁and ▁that ▁the ▁dimin ishing ▁numbers ▁of ▁pre - 1 9 9 8 ▁water craft ▁in ▁use ▁continue ▁to ▁emit ▁substantial ▁poll ution . ▁ ▁Again st ▁this , ▁industry ▁groups ▁such ▁as ▁the ▁Personal ▁Water craft ▁Indust ry ▁Association ▁point ▁out ▁that ▁environmental ▁groups ▁continue ▁to ▁c ite ▁poll ution ▁levels ▁of ▁pre - reg ulation ▁water craft ▁and ▁ignore ▁the ▁improvements ▁made ▁to ▁newer ▁models ; ▁and ▁further more , ▁that ▁personal ▁water craft ▁are ▁unf air ly ▁sing led ▁out ▁when ▁they ▁are ▁no ▁more ▁poll uting ▁than ▁other ▁power ed ▁boats . ▁ ▁Haz ards ▁ ▁A part ▁from ▁the ▁obvious ▁ha z ards ▁of ▁coll isions ▁and ▁mechanical ▁break down s ▁common ▁to ▁all ▁vehicles , ▁operating ▁or ▁r iding ▁a ▁P W C ▁can ▁involve ▁a ▁risk ▁of ▁or ifice ▁inj uries . ▁These ▁inj uries ▁are ▁typical ▁of ▁the ▁kinds ▁of ▁inj uries ▁that ▁waters ki ers ▁experience ▁as ▁a ▁result ▁of ▁falling ▁into ▁the ▁water ▁at ▁speed . ▁Such ▁inj uries ▁can ▁occur ▁from ▁simply ▁falling ▁in ▁the ▁water ▁at ▁speed ▁or ▁they ▁can ▁occur ▁from ▁the ▁output ▁end ▁of ▁the ▁p ump ▁jet .