### Question
Can you define what Southern Arizona means?


### Answer
**Southern Arizona** is defined as the following in *43 U.S.C. § 390h*:

> those portions of the counties of Pima, Santa Cruz, and Pinal within the Tucson Active Management Hydrologic Area as defined by the Arizona Department of Water Resources

#### Citation:
  - *43 U.S.C. § 390h*
  - Heading: **CHAPTER 11A-BOARD ON GEOGRAPHIC NAMES > SUBCHAPTER I-GENERAL PROVISIONS**

