Water Rights & Water Quality
What Water Rights and Water Quality Law Involves
Water rights and water quality law governs how water is allocated, used, protected, and regulated across California. This complex area blends property rights, environmental protections, and public resource management. It covers surface water, groundwater, imported water, and treated wastewater.
At its core, water rights determine who can use water, how much they can take, and for what purposes. Water quality rules protect streams, lakes, aquifers, and coastal waters from pollution while meeting strict federal and state standards. Our attorneys help clients navigate both the rights to use water and the responsibilities to keep it clean.
California follows a unique blend of riparian rights, prior appropriation, and regulated groundwater systems. Layered on top are federal laws such as the Clean Water Act, Safe Drinking Water Act, and Endangered Species Act, along with state statutes administered by the State Water Resources Control Board and regional water quality control boards.
Why This Practice Area Matters to California Clients
Water is one of California's most precious and contested resources. Whether you own agricultural land, operate a business, manage a municipality, or develop real estate, secure and reliable water supplies directly affect your success.
California's climate, growing population, and environmental goals create constant tension between water supply and water protection. Droughts, floods, regulatory changes, and legal challenges can quickly alter the value of your water rights or expose you to costly compliance obligations.
Strong legal guidance helps clients protect their water assets, avoid expensive violations, and plan for long-term sustainability. Businesses and landowners who understand and secure their water position gain a significant competitive advantage in the state.
Common Issues Clients Face
- Disputes over the scope and priority of water rights during droughts
- Challenges to groundwater pumping under the Sustainable Groundwater Management Act (SGMA)
- Obtaining or transferring water rights for new projects or expanded operations
- Navigating complex permitting processes for water diversion, storage, or wastewater discharge
- Responding to enforcement actions or citizen suits alleging water quality violations
- Meeting stringent requirements for wastewater treatment, stormwater management, and recycled water use
- Protecting water rights during environmental reviews under CEQA or NEPA
- Defending against claims of unreasonable use of water under Article X, Section 2 of the California Constitution
- Coordinating with multiple agencies that regulate different aspects of the same water source
How Chapman Law Group Helps Clients
We provide strategic counsel that protects your water resources while supporting your business or property goals. Our team works proactively to secure and defend water rights before conflicts arise and to resolve disputes efficiently when they do.
Clients benefit from our deep understanding of both the regulatory framework and the practical realities of water use in California. We translate complex rules into clear strategies that minimize risk and maximize value.
Whether negotiating water transfers, litigating priority disputes, securing permits, or defending enforcement actions, we focus on practical outcomes. Our goal is to give clients certainty and flexibility so they can focus on their core operations rather than water-related legal complications.
By combining technical knowledge with seasoned advocacy, we help agricultural producers maintain reliable supplies, assist municipalities in meeting public health standards, support developers in obtaining necessary approvals, and guide businesses through compliance programs that avoid penalties while advancing sustainability objectives.
Key Legal Considerations in Water Rights and Water Quality
Water Rights Basics
Riparian rights attach to land bordering a watercourse and allow reasonable use. Appropriative rights, common in much of the state, operate on a "first in time, first in right" system and generally require a permit from the State Water Resources Control Board. Overlying groundwater rights and adjudicated basins add further layers of complexity.
Regulatory Framework
The Porter-Cologne Water Quality Control Act serves as California's primary water quality law. It works alongside the federal Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permits, Total Maximum Daily Load (TMDL) requirements, and Section 404 wetlands permits. Understanding how these laws interact is essential for compliance and project success.
Sustainable Groundwater Management Act (SGMA)
Enacted in 2014, SGMA requires local agencies to develop groundwater sustainability plans. Property owners must understand how these plans may limit future pumping and what rights they retain during implementation.
Reasonable Use Doctrine
California Constitution Article X, Section 2 requires that all water use be reasonable and beneficial. What constitutes reasonable use can change over time based on supply conditions, competing needs, and environmental considerations.
Water Transfers and Change Petitions
Moving water from one place to another or changing the purpose or place of use often requires regulatory approval. The approval process examines impacts on other users, the environment, and public trust resources.
Our attorneys stay current with evolving case law, legislative updates, and agency policies that affect these key considerations. This knowledge allows us to provide forward-looking advice that anticipates regulatory shifts and legal challenges.
Effective water rights and water quality counsel delivers more than legal compliance. It creates opportunities for clients to secure reliable supplies, develop creative solutions to supply challenges, and build resilience against future uncertainty in California's dynamic water environment.