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Public Works Agency
Groundwater Supply and Demand – Ventura County and FCGMA Perspective
Presentation to Santa Clara River Watershed Committee July 23, 2015 Gerhardt Hubner, P.G. Deputy Director Watershed Protection District
Groundwater Supply and Demand Ventura County Public Works Agency - - PowerPoint PPT Presentation
Groundwater Supply and Demand Ventura County Public Works Agency - - PowerPoint PPT Presentation
Groundwater Supply and Demand Ventura County Public Works Agency and FCGMA Perspective Presentation to Santa Clara River Watershed Committee July 23, 2015 Gerhardt Hubner, P.G. Deputy Director Watershed Protection District 2013 Water
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Ventura County Water Resources
Agriculture 57.3% Municipal & Industrial 42.7% Slide 3
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Ventura County Groundwater Resources and Users
Agriculture Municipal & Industrial
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2014 Annual Report of Groundwater Conditions
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Groundwater Basin Name:
2014 Groundwater Levels in General for All Wells Gauged by County Primary MCL Exceedances for Nitrate >45mg/l? Yes, 3 Wells Secondary MCL Exceedances for Chloride >250mg/l? No Secondary MCL Exceedances for TDS >500mg/l? Yes, 42 wells Secondary MCL Exceedances for Sulfate >250mg/l? Yes, 36 wells Upper System UAS "Key" well 01N21W07H01S: SWN Nitrate Chloride TDS Sulfate 02N21W19A01S LAS "Key" well 01N21W32K01S: 02N22W24R02S 02N22W25A02S 02N22W25F01S Upper System 02N23W25M01S Lower System SWN Nitrate Chloride TDS Sulfate 01N21W06L05S 01N21W08R01S 01N21W19J05S 01N21W20K03S Lower System 01N21W21H02S 01N21W21H03S 01N21W28D01S 01N22W03F05S 01N22W16D04S 01N22W19A01S 02N21W20Q05S 02N22W36E02S Groundwater Level Trend Notes: Level trending up Level trending down Groundwater Quality Trend Notes: Trend is relatively flat, or no clear trend Level trending up Level trending down For upper system, one well is in the northwest, the remaining wells are in the
- northeast. For lower system the wells are generally in the center of the basin along
a northeast to southwest line, and a small group in the southeast. Oxnard Plain Pressure LAS "Key" well 01N21W32K01S - December level was up 8.10 feet from the January measurement. UAS - Oxnard Pressure basin groundwater: Oxnard aquifer samples are calcium sulfate type. Mugu aquifer samples are calcium sulfate type. LAS - Oxnard Pressure basin groundwater: Hueneme aquifer samples are calcium sulfate type. Fox Canyon aquifer samples are sodium sulfate type. UAS "Key" well 01N21W07H01S - December level was down 10.73 feet from the January measurement. ( 42 wells) 2014 Groundwater Quality in General for All Wells Sampled by County In general for 25 wells measured in 2014 in the basin, water levels declined in 22 and rose in 3 wells over the course of the year from the 1st quarter reading to the last quarter reading. The 5 year trend based on a review of the Fall 2010 through Fall 2014 potentiometric surface maps is downward. The 5 year trend based on a review of the Fall 2010 through Fall 2014 potentiometric surface maps is downward. 5 Year Groundwater Level Trend 2010 - 2014 5 Year Groundwater Quality Trend 2010-2014
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FCGMA Annual Report
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149,715 AF
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2014 1990
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2013 FCGMA Annual Rainfall = 3.49 inches
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2014 FCGMA Annual Rainfall = 10.05 inches
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1990 2014
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