Water Resources Staff


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Name Role Phone Responsibilities
Sierra Ryan Water Resources Manager (831) 454-3133

Manages the Water Resources sections of Environmental Health Services. Coordinates water resource management activities among the other county departments and works closely with other local, state, and federal water supply and resource management agencies in the County and the Central Coast. 

Audrey Levine Water Quality Program Manager;
Laboratory Director

(831) 454-2736 (office)
-4624 (laboratory)


Strategic management of County's water quality program and ELAP certified laboratory. Program is focused on identifying health risks related to water quality; meeting regulatory requirements of the Clean Water Act and Safe Drinking Water Act; investigations of water quality impairments; analysis of long-term, seasonal, or episodic water quality trends; and sound science, 

Matt Bessee Water Quality Specialist

(831) 454-5010(office)
-4624 (laboratory)


Laboratory and field investigations to evaluate microbiological and chemical water quality with an emphasis on indicator bacteria, microbial source tracking, and nutrients. Manage field sampling program to meet montioring requirements of State and Federal Beach Saety Program and Clean Water Act (Total Maximum Daily Loads, Stormwater). Conduct water quality invesigations and forensic analysis of drinking water, groundwater, and ambient water systems.

Nilo Alvarado Water Quality Specialist

(831) 454-2739(office)
-4624 (laboratory)

Laboratory and field investigations to evaluate microbiological and chemical water quality with an emphasis on cyanobacteria and algal toxins, geochemical parameters, herbicides, and indicator bacteria. Manage laboratory quality assurance program and laboratory safety programs  in accordance with Environmental Laboratory Accredidtation Program (ELAP).

Kristen Kittleson Fishery Resource Planner (831) 454-3154

Watershed programs and projects to preserve and enhance steelhead trout, Coho salmon and aquatic habitats.  Serves as the administrative staff for the County of Santa Cruz Fish and Game Advisory Commission and is the project manager for an annual stream habitat and juvenile steelhead monitoring program.

Nathan Salazar Water Quality Specialist (831) 454-2145

Lead for the drinking water program to ensure that the small water systems (5-199 service connections) in the county are providing safe drinking water to their customers and are in compliance with local, state, and federal regulations. Conducts groundwater monitoring program.

Sean Abbey Water Quality Specialist (831) 454-2386

Assists the drinking water program lead in ensuring the program is running smoothly. Leads the water conservation program. Assists fishery conservation efforts, including habitat surveys, report preparation, and outreach.