Water Sources and Production

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Water Sources

The City of Davis water system is a conjunctive use system and utilizes both surface water and groundwater for its potable water supply. The primary water source is surface water supplied from the Sacramento River which accounted for approximately 64% of delivered water in 2021. Groundwater provides the remaining 36% and is pumped from underlying aquifers that range from 200 to 1,700+ feet below ground surface. The City has 9 active groundwater wells throughout town, but the majority of water pumped to be supplied as drinking water comes from 5 deep aquifer wells.

Learn more about the city's surface water source from the Woodland-Davis Clean Water Agency.

Water Production

Water production is the amount of water that enters the distribution system. This is the combination of surface water and groundwater. 

The table and graph below show the current water production by month compared to previous years. The table below them shows the water delivered by source for each month of 2023.

State Monthly Water Conservation and Production Reports 

Total Water Production (Million Gallons)
 Year  Jan
Feb
Mar
Apr
May Jun
Jul
Aug Sep
Oct
Nov
Dec
2018 161 166 161 207 331 385 427 402 350 327 250 154
 2019 155 138  153  217 296 367 409 406 357 335 261 158
 2020 155 181  212  234 331 377 415 405 357 334 230 181
 2021 164 150  200  302 365 391 411 390 352 284 166 149
 2022 156 193  238  246 326 350 375 370 327 295 197 150
 2023 151 142  147  201 293 337 378 374 334 288  198 158
 2024  151  139 155   206  314 367  414  392         

 Total Production Chart

2022 Water Delivery by Source

2023 Water Deliveries (Percentage by Source)
% Surface Water
% Groundwater
Jan 99.6 0.4 
Feb 99.6 0.4
Mar 88.9 11.1
Apr 95.8 4.2
May 86.9 13.1
Jun 85.9 14.1
Jul 73.3 26.7
 Aug 89.0 11.0
Sep 94.0 6.0
Oct 97.1 2.9
Nov 98.9 1.1
Dec 94.2 5.8