Which of the following rights is most likely to be affected by a water rights adjudication?

In the context of Arizona water rights, Type 2 rights, also known as "post-1919 rights," are the most likely to be affected by a water rights adjudication. These rights are usually subject to the decisions made in the adjudication process, which seeks to determine the legal status and priority of water rights in a given area.

Water rights adjudications aim to create a comprehensive and equitable system for allocating scarce water resources, especially when there are competing claims. Since Type 2 rights were established after significant regulatory frameworks were developed, they are more vulnerable to changes through adjudications that address how water is distributed and the legal entitlements of various claims.

While superior rights, which are based on a first in time, first in right principle, and pre-1919 rights, which have established precedence, are generally more secured and recognized in the water rights hierarchy, they may not be directly impacted by new adjudications, especially if those adjudications do not challenge the established rights. Exempt domestic wells also tend to have different regulatory considerations and may not be as significantly influenced by adjudications that focus on larger, established rights.

Thus, the adjudication process primarily targets the less established post-1919 rights, like Type 2 rights, to