Water Authorities - As enacted, expands the areas served by the West Tennessee River Basin Authority to include Perry, Stewart, Houston, and Humphreys counties. - Amends TCA Title 64, Chapter 1, Part 11.

SB 520 expands the service area of the West Tennessee River Basin Authority to include Perry, Stewart, Houston, and Humphreys counties. The bill directly affects these four counties and the authority, which will now have jurisdiction over them. Key provisions require the authority to provide only technical assistance, engineering services, and project management support in these newly added counties, rather than full program delivery. This change updates the authority's jurisdictional boundaries in Tennessee Code Annotated Title 64, Section 64-1-1101(c)(1), while maintaining existing service structures for other counties.