Depends whose personal pool it is....if it's one where they have little kids and the water is not monitored well, then no. If it's your own personal pool and you know that you are monitoring it then you are much better off.
Ocean water is usually OK...but it's safe to say now that that the Gulf is off limits! Lakes, rivers and streams are usually considered off limits as well.
As far as Hawaii travel, Liberty Dialysis is on all islands except Lanai. FMC is on Oahu and Lanai. Both Liberty and FMC have central admissions offices. They also both have clinics that are near the Waikiki area for those going to Oahu. Both companies have recently implemented requirements for 2 step PPDs within 30 days of your first treatment at their clinic along with their usual other requirements for labs within 30 days, hep b results, H & Ps, etc. Feel free to ask me about travel to Oahu as I LOVE talking about my beautiful island.