re: Cleaning red dirt on brick

Is it just around the base of the brick? Probably don't need a pressure wash, but that's probably the fastest way. Hit it with a water hose with a spray nozzle and see how easy it comes off. A stiff brush would also help knock off any clumps of mud. If that doesn't get it easily, go get one of those $100 electric pressure washers from Lowe's.