Understanding Arizona water laws: what every real estate agent should know

Water regulations in Arizona can directly impact whether a property can be developed, financed, or sold without issue. For real estate professionals, understanding how water availability and rights affect a property now and in the future is essential to guiding clients with confidence.  

This is especially important when working with land, rural properties, or new construction. 

Let’s review the basics of Arizona water regulations, along with the related continuing education (CE) requirement for real estate agents.  

Key takeaways 

• Understand Arizona’s different water rights: Arizona regulates surface water and groundwater separately, and water rights may not automatically transfer with a property sale.  

• Know how active management areas affect properties: Properties located within Arizona’s AMAs may face stricter groundwater regulations, water-use limitations, and development approval requirements.  

• Treat water issues as material facts: Known concerns involving wells, water availability, shared systems, or usage restrictions should be disclosed because they can impact a property’s value and future use.  

• Review private wells and shared water agreements carefully: Rural properties that rely on wells, hauled water, or shared systems may involve additional responsibilities, maintenance agreements, and legal considerations.  

• Stay current through Arizona CE requirements: Arizona’s required continuing education topics, including Arizona Water, help agents stay informed about regulations that can affect transactions, development, and client guidance. 

The two types of water rights 

Arizona regulates surface water and groundwater differently. 

Surface water, such as rivers and streams, follows the rule of “first in time, first in right.” This means those who established rights first have priority access. 

Groundwater, which is water found underground, is governed by the Groundwater Management Act of 1980. This law was created to prevent overuse and protect the long-term supply. 

Understanding the difference is important because water rights are not all the same, and they don’t always transfer with a property in the way buyers expect. A property may have access to groundwater through a well but no legal right to use nearby surface water, or vice versa. This can affect everything from daily use to future development plans, so it’s important to verify exactly what type of water access is included with the property. 

Active Management Areas (AMAs) 

Many parts of Arizona fall within Active Management Areas, also known as AMAs. These are regions where groundwater use is more strictly controlled because supply is limited. Within these areas, water use is closely monitored and regulated. Some properties must demonstrate a 100-year assured water supply before they can be developed. 

Wells and changes to water use may also require approval. For example, if a property owner wants to move water rights from one property to another or change how the water is used, such as from agricultural to residential use, that process is considered a water transfer and is regulated by the state. 

As an agent, it’s important to know whether a property is located within an AMA. This can affect what a buyer is allowed to do with the property, as well as how quickly a project can move forward. 

Water and property disclosures 

When advising clients, it’s important to treat water as a material factor in every transaction. 

For sellers, that means clearly disclosing any known issues with water availability, wells, or shared systems, along with any limitations on use.  

For buyers, it’s equally important to encourage thorough due diligence. Water rights are not always automatically tied to the property, so verifying exactly what’s included and what can legally be used is a key part of protecting your client’s interests. 

A good rule to follow: if water could affect the value or use of a property, it should be disclosed. 

Wells and private water systems 

Many properties in Arizona rely on private wells or shared water systems. Some may even depend on hauled water and storage tanks. 

These systems often come with specific responsibilities and limits. There may be agreements between neighbors that outline how water is shared and maintained. Without clear documentation, misunderstandings can occur. 

Reviewing these details early in the transaction helps prevent problems later. 

Water-related Arizona real estate CE requirements 

For agents, staying informed is important. Even small policy changes can impact timelines, approvals, and client expectations. 

Arizona requires agents to complete one hour each of Firewise, Deed Fraud Prevention, and Arizona Water as part of their continuing education for license renewal. These topics are not just about compliance. They help you better serve your clients and protect your transactions. 

The “Fire | Water | Deed” course offered by Arizona School of Real Estate and Business (ASREB) is designed to help you meet this requirement while building practical knowledge you can use in your business. You can buy this course separately or as part of a CE course package.