Arizona resident Pablo has a piece of land that was irrigated with groundwater between 1975 and 1980. Which of the following grandfathered rights does Pablo likely have?

Pablo is likely to have acquired an irrigation grandfathered right because he irrigated his land with groundwater during the specified period of 1975 to 1980. In Arizona, this duration of use contributes to the establishment of rights under the concept of being "grandfathered," which allows users to retain certain water rights associated with their historical usage.

Irrigation grandfathered rights are designated for those individuals or entities that were actively using groundwater for irrigation purposes in defined periods prior to the establishment of more stringent regulations on groundwater usage. These rights allow users to continue relying on groundwater for agricultural purposes, even as regulations evolve to restrict or limit new water withdrawals.

The other options do not apply to Pablo's situation. Municipal water rights pertain to water usage by cities or towns for public supply; domestic water rights are generally associated with the use of water for household needs; and commercial water rights would be relevant to businesses requiring water for operations. As Pablo's use is strictly related to irrigation, this emphasizes the appropriateness of the irrigation grandfathered right.