Texas indeed has been blessed with much sunlight to make solar energy quite viable. This includes solar hot water heaters, and many trees to grow with vigour and bio-filtrate.
Presumably it's toxic mostly because of the concentration of salt.
If it can't be used—and up north salt is used in winter for roads—it can be cleaned a bit, diluted with more seawater and discharged back into the ocean.
((the brine of 1 mass unit of seawater that's been desalinated) + 20 units of regular seawater) ÷ 20 = 20 units of 5% saltier seawater discharged
It's nice that you think you, without any experience in the matter, can solve problems with desalination that engineers in the field can't, but I doubt you are actually able to.