not in texas,ive collected rain water for 50 yrs,well let me rephrase that,if and when we do get rain which is usally around feb i fill all my barrels and 250 gal ibc toe with rain water,it is so rare that i even stand out in the flash flood and fill 5 gal buckets to fill my barrels and totes before the rain stops hhahah,ive never heard of collection being illegal any were in this state and lived here 59 years,hell all the water at or deer camps and such is rain water,some have 5 or 6 250 gal IBC totes on the leases,if there is a roof or lean to anywere near a tote it is catching water,my place in west texas ,the only water there is there is feed into my rain tower,there is a wind mill pumping water for the animals but isnt really a potable water for humans,but ya ive lived every were in the state just about and have never heard of it.
wouldnt matter if it was ,we have a tendacy to do as we please here and will go tooth and nail all the way hahahahh