The NEC points out the distance of this recepticle
680.22 says "(3) Dwelling Unit(s). At a dwelling unit, one 15A or 20A, 125V receptacle shall be located not less than 10 ft and not more than 20 ft from the water."
But, if you keep readin it says later "4) Restricted Space. Where a pool, outdoor spa or hot tub is within 10 ft of a dwelling, the receptacle required by (3) shall be permitted to be installed not less than 5 ft measured horizontally from the inside wall of the water."
******On Edit*********
If was correctly pointed out to me that the 2014 code which has been adopted in many areas changed this area of the code. In the 2014 NEC it now says:
680.22 (A) Receptacles.
(1) Required Receptacle Location. One 15A or 20A, 125V receptacle must be located not less than 6 ft and not more than 20 ft from the inside wall of a permanently installed pool, outdoor spa, or outdoor hot
tub. This receptacle must be located not more than 6½ ft above the floor, platform, or grade level serving the permanently installed pool, outdoor spa, or outdoor hot tub.
Texas adopted the 2014 NEC in September 2015 with local changes allowed, but other jurisdictions may not have adopted the latest version or in fact may have made changes to it. Always check with your Authority Having Jurisdiction (building department) about what code is in force and if there are local modifications to the National Code.