Water rights in California fall into a handful of recognized categories — riparian, pre-1914 appropriative, post-1914 appropriative, pueblo, and, for water pumped from the ground, rights now shaped by the Sustainable Groundwater Management Act. Every one of them sits under the same ceiling: Article X, Section 2 of the California Constitution limits any water right to the amount “reasonably required for the beneficial use to be served,” and forbids waste or unreasonable methods of use.1Justia Law. California Constitution Article X Section 2 What type of right you hold determines whether you need a permit, where you can use the water, how you rank in a shortage, and what you must do to keep the right alive.
The Reasonable Use Ceiling
Article X, Section 2 is self-executing. The State Water Resources Control Board and the courts can enforce it directly, without waiting for the Legislature. It applies to every right regardless of age or category, which means even a senior pre-1914 claim can be cut back if the method of use is wasteful by today’s standards.
What counts as reasonable shifts over time. An irrigation practice that was ordinary in the 1950s may be unreasonable today given available alternatives. The Board weighs the purpose of use, the availability of better methods, and the impact on other users and the environment. The same standard underpins the public trust doctrine, which the California Supreme Court applied to water rights in 1983 and which allows the state to revisit even vested rights that cause serious harm to navigable waterways and related ecosystems.
Types of Water Rights
Riparian Rights
Riparian rights attach to land that borders a natural watercourse. If you own riparian land, you share the stream’s natural flow with other riparian owners without needing a state permit.2California State Water Resources Control Board. Water Rights Process Three constraints come with that: the water can only be used on the riparian parcel itself, you cannot divert it outside the watershed, and seasonal storage is not allowed. In a drought, every riparian user takes a proportional cut rather than one owner being paid out ahead of another.
Pre-1914 Appropriative Rights
Before California created a permit system, miners and settlers established rights simply by diverting water and putting it to beneficial use. Those pre-1914 appropriative rights still exist and need no permit from the Board.3California State Water Resources Control Board. Water Rights FAQs They follow first in time, first in right: the older your diversion, the stronger your claim in a shortage, and a senior holder is entitled to the full allocation before any junior holder gets anything. Proving one of these rights means producing historical documentation going back more than a century.
Post-1914 Appropriative Rights
The Water Commission Act of 1913, effective in 1914, created a state permit system for new appropriations. If you want to divert from a stream, river, or subterranean stream flowing through a known and defined channel, and you do not hold a riparian right, you need a permit from the State Water Resources Control Board.4California Legislative Information. California Code WAT 1200 – Water Subject to Appropriation Post-1914 rights also rank by seniority, with earlier permits taking priority over later ones.
Pueblo Rights
Pueblo rights are a rare category rooted in Spanish and Mexican colonial law. A city that succeeded a former Spanish or Mexican pueblo holds a paramount right to the water of the watershed passing through the original pueblo lands, to the extent needed for its inhabitants. Los Angeles and San Diego are the best-known holders. These rights are superior to both riparian and appropriative claims, but they belong only to a handful of municipalities with documented pueblo origins.
Getting a New Appropriative Permit
A post-1914 right starts with an Application to Appropriate Water. The application asks for the point of diversion, the place of use, the specific beneficial purpose, the volume (in acre-feet per year, and for direct diversions a rate in cubic feet per second), the season of diversion, and maps of any conveyance or storage. Vague or inconsistent descriptions can get an application rejected at the initial screening stage before it ever reaches public notice, so most applicants rely on hydrological reports and land title records to assemble the filing.
Filing fees scale with volume. For fiscal year 2025–2026, a diversion of less than 10 acre-feet per year carries a $5,000 application fee. Requests between 10 and 200 acre-feet jump to $40,000, and larger projects climb from there, reaching $811,000 for diversions over 200,000 acre-feet per year.5State Water Resources Control Board. SWRCB Water Rights Fiscal Year 2025-2026 Fee Schedule Summary Projects in the Sacramento–San Joaquin Bay-Delta watershed or involving on-stream dams in northern coastal areas face an added 20% surcharge. Part of the fee is non-refundable once the Board begins review.
After filing, the Board publishes public notice and opens a protest period.6State Water Resources Control Board. Water Rights Application Process Existing right holders, environmental organizations, and public agencies can object if they believe the diversion would injure their supply or harm fisheries. Resolving a protest sometimes means negotiating modified terms; other times it goes to a Board hearing. The application also runs through environmental review under the California Environmental Quality Act, which can range from a brief initial study to a full environmental impact report.7California State Water Resources Control Board. Division of Water Rights Permitting – California Environmental Quality Act
If the Board finds the project legally sound and that unappropriated water is available, it issues a permit allowing construction and initial use, usually with conditions such as bypass flows for fisheries or seasonal limits. Once you demonstrate that the water has actually been put to beneficial use as described, the permit converts to a license, which is the permanent right. Timelines vary widely with complexity and protests, and multi-year waits are common.
Groundwater and the Sustainable Groundwater Management Act
For most of the state’s history, landowners could pump groundwater beneath their property with virtually no state oversight. The Sustainable Groundwater Management Act, passed in 2014, changed that for over-pumped basins.8California State Water Resources Control Board. The Sustainable Groundwater Management Act Codified starting at Water Code Section 10720, SGMA requires affected basins to reach sustainability within 20 years of implementing their plans.9California Legislative Information. California Code WAT 10720
Groundwater regulation under SGMA is deliberately local. High- and medium-priority basins must form Groundwater Sustainability Agencies, each of which adopts a Groundwater Sustainability Plan addressing subsidence, water-quality degradation, and declining levels in that basin.10Department of Water Resources. Sustainable Groundwater Management Act If a GSA fails to adopt an adequate plan or meet its milestones, the state can take over management of the basin.
Metering and Reporting
A GSA can require every groundwater extraction facility in its area to install a measuring device acceptable to the agency, and the cost of the meter falls on the well owner.11California Legislative Information. California Code Water Code WAT 10725.8 GSAs can also require annual extraction statements reporting total pumping in acre-feet. De minimis extractors — generally those pumping less than two acre-feet per year for domestic use — are exempt from metering. Phase-in schedules vary by basin, and some GSAs start with the highest-volume wells.
Extraction Fees
GSAs can impose fees on groundwater extraction and other regulated activities to fund plan preparation, monitoring, compliance, and enforcement.12California Legislative Information. California Code Water Code WAT 10730 Fee amounts vary by basin, and the authority is broad. In critically overdrafted basins, the combination of pumping restrictions and fees tends to be the most aggressive.
Transferring a Water Right
Water rights can be transferred, but the Board must approve the change to make sure no one else is injured. To change a point of diversion, place of use, or purpose of use on a permit or license, you file a change petition and show that the change will not injure other legal users, will not harm the environment, and is in the public interest.13California State Water Resources Control Board. Standard Change Petition You also consult with the Regional Water Quality Control Board and the California Department of Fish and Wildlife before filing.
Transfers fall into two tracks. A temporary transfer runs one year or less and usually gets streamlined review. A long-term transfer runs longer and faces fuller Board scrutiny.14Justia Law. California Code Water Code 1735-1737 – Long-term Transfers Both go through CEQA review and a protest period. Water marketing has grown in drought years, when senior agricultural users sell temporary allocations to urban agencies, but the Board will not approve a transfer that effectively creates a new right or expands the original right’s scope.
Losing a Right by Not Using It
Appropriative rights follow a use-it-or-lose-it rule. Under Water Code Section 1241, if you hold an appropriative right and fail to put the water to beneficial use for five consecutive years, the unused water may revert to the public and be treated as unappropriated.15California Legislative Information. California Code Water Code 1241 – Beneficial Use Riparian rights are not subject to this forfeiture, because they attach to the land itself rather than to a specific quantity.
Conservation Does Not Count Against You
The forfeiture clock does not run on water you save through conservation. Water Code Section 1011 treats a genuine conservation-based reduction as the equivalent of reasonable beneficial use for the full amount of the right, and extends the same protection to temporary land fallowing and crop rotation.16California Legislative Information. California Code Water Code WAT 1011 The Board can require you to file periodic reports documenting how much was conserved and why; miss those reports and you lose the protection. Water conserved under this provision can also be sold, leased, or transferred, with the right reverting to you when the transfer ends.
Hardship Extensions
The five-year period can be extended by up to 10 additional years if the non-use results from compliance with a federal crop control or soil conservation contract, or other hardship cases the Board defines by rule.17California Legislative Information. California Code Water Code 1241.6 – Extension of Forfeiture Period If the federal contract is shorter than 10 years, the extension equals its duration. The provision exists so that participation in federal conservation programs does not cost a farmer the underlying right.
Penalties for Diverting Without a Right
Taking water without a valid right is treated as a trespass under Water Code Section 1052, and the daily penalties stack quickly:
- Standard unauthorized diversion: up to $500 per day for each day the trespass occurs.
- Drought or emergency conditions: up to $1,000 per day, plus $2,500 per acre-foot diverted in excess of the user’s rights. This applies during critically dry years preceded by two or more consecutive below-normal years, or during a Governor-declared drought emergency.
- Unlicensed cannabis cultivation: up to $3,500 per day, regardless of drought conditions.
Penalties can be imposed by the superior court through an action brought by the Attorney General or administratively by the Board itself, and the Board can also seek injunctions to stop ongoing diversions.18California Legislative Information. California Code Water Code 1052 If you receive an Administrative Civil Liability Complaint, you have 20 days from the date of service to request a hearing.19State Water Resources Control Board. Water Conservation Portal – Administrative Civil Liability Complaints Because daily penalties accumulate over months or years of unauthorized use, total exposure in an enforcement case can reach six or seven figures.