At the December 12, 2019 Board meeting, Ordinance No. 19-02, An Ordinance Requiring Registration Of Groundwater Use Facilities, Water User Reporting And Authorizing The Adoption Of Groundwater Sustainability Fee was approved.


The Santa Rosa Plain GSA Board approved a Groundwater Sustainability Fee and a Groundwater Users Registration Program at the June 13, 2019 meeting. Ordinance No. 19-01

See the Press Release for additional information about this action.

Scroll down for  information about the fee, the amount and how it’s calculated.

In a related action, on Tuesday, May 21, the Board of Directors of the Sonoma County Water Agency (Sonoma Water Board) and the Sonoma County Board of Supervisors (County Board) approved a plan to offset the fee if it is imposed on rural groundwater users in the Santa Rosa Plain (an area extending from Santa Rosa west to Sebastopol, north to Windsor and south to Cotati). Under the plan, the County and Sonoma Water would contribute a total of up to $240,000 annually for three years to the Santa Rosa Plain Groundwater Sustainability Agency (GSA). Under this plan, the fees that would be paid by rural groundwater users would instead be covered by the contribution.

See the Press Release for additional information about this action.

Link to  June 13, 2019 signed Ordinance No. 19-01

Draft Groundwater Users Registration Ordinance




Meeting Notes & Recordings

June 11, 2019 Rate Study Report

Why a fee is needed

A state law, the Sustainable Groundwater Management Act (SGMA), was passed in 2014. The primary aim of this law is to provide a framework for sustainable, local groundwater management in places like the Santa Rosa Plain.

Rather than let the state take over managing the groundwater basin at a much higher cost to residents [$100 annually for rural residential well owners, and $300 (base fee) plus $40 per acre foot of water used annually for large well owners], local agencies stepped forward to create the Santa Rosa Plain Groundwater Sustainability Agency (GSA). These agencies provided funding for the first two years of the GSA’s operations. The boards of these agencies agreed that the GSA must become self-funded beginning its third year of operation – July 1, 2019 through at least 2022 when a Groundwater Sustainability Plan (GSP) is required by the State.

What is the Groundwater Sustainability Fee?

For more than a year, the GSA’s Board, Advisory Committee, staff, consultants and legal counsel – in consultation with stakeholder groups and the community – considered fair, legal and effective ways to fund the GSA. The resulting, groundwater sustainability fee would be paid by all groundwater users in the Santa Rosa Plain. The fee is based on actual (if known) or estimated groundwater use, and will ensure that clean, plentiful groundwater is available to people today and into the future.

Table 1. Proposed Groundwater Sustainability Fee



Rural residential well owners who use their wells for drinking, landscaping and gardening would pay: $8 – $13 per parcel annually
Cities, towns, mutual water districts, agriculture, golf courses, and other commercial users would pay: $16-26 per acre foot of actual or estimated groundwater used annually
Urban well owners who get drinking water from a city or water district but use well water for irrigation would pay: $1-$3 per parcel annually


How the fee is calculated

The fee would be based on actual or estimated groundwater use. California state law and best practice nationwide supports the use of estimates, based on reports, studies and crop type. See the table below to learn how the fee is calculated for your groundwater use.

Table 2. Fee Calculation

Rural residential landowners who use their wells for drinking, landscaping and gardening All rural residential landowners are assumed to use .5 acre feet of groundwater annually (equivalent to 162,925 gallons)
Urban well owners who get drinking water from a city or water district but use well water for irrigation All urban well owners are assumed to use .10 acre feet annually (equivalent to 32,585 gallons)
Cities, mutual water companies, golf courses and other large water users with metered wells Fee calculated on actual water use, averaged over a five year period
Large water users without meters (primarily agriculture) Fee calculated by multiplying number of irrigated acres by estimated annual applied water for specific crop type (crop coefficient)

How fee will be used

The fee will raise about $337,000 annually. Part of this funding will pay for the development of the state-required Groundwater Sustainability Plan (GSP). The GSP is a science-based, quantitative plan to ensure that residents, farms, businesses and the environment has groundwater now and for 20 years into the future. Fortunately, the GSA was awarded a $1 million state grant, which covers 90% of the GSP costs. The fee would cover the remainder of the GSP costs and the GSA’s day-to-day operations. Expenses include applying for and complying with grants; legal services; informing people about the GSA and what it is doing; developing agendas for the Board and Advisory Committee, staffing meetings and coordinating contracts. The full budget is available online.

How long will the new rates or fees be in place once they are enacted?

The fees implemented for the GSP development stage will be in place through at least 2022, at which time the continued funding of the GSA and its work to implement the completed GSP will be reassessed.

Will the rates be raised over time?

The fees as approved, will not be raised through at least 2022. After 2022, if fees need to be changed another public process to assess and get feedback on fees will occur.

Well Registration Program

To help implement the groundwater sustainability fee and to gain a better understanding of the number of wells in the basin, the GSA will also implement a well registration program. People and businesses in areas without a public water system and farmers who irrigate crops will be assumed to have a well and will receive a letter letting them know that their well will be registered. If they willing to share information about their well to add to the GSA’s knowledge of the basin, they can go online or call to speak to staff. An appeals process will be established for landowners who receive a letter, but don’t have a well.

Will my well be metered?

The law (SGMA) prohibits the GSA from requiring meters on ‘de minimis’ wells (wells that are used for homes, gardens and landscaping, but not for commercial purposes) and that use less than 2 acre feet of water a year. Rural residential wells are considered ‘de minimis‘ — and the GSA is PROHIBITED from metering these wells.

For more information about treatment of domestic wells under SGMA, go to this State Water Quality Control Board link.