• We tackle cutting edge problems addressing human exposure to waterborne contaminants

  • We are creative, Passionate and experienced analysts

  • We are good listeners and skillful communicators

Risk Assessment





We design, conduct, and communicate chemical and microbial risk assessments. We are thought leaders in the fields of Quantitative Microbial Risk Assessment and recreational water risks.

Statistical Analysis of environmental data



We analyze environmental data, interpret the results, and document findings.  Our work is widely published in prestigious scientific journals.

potable and non-potable Water reuse Evaluation




Recycled water has been a focus for us for over twenty years. We have worked on landmark studies and published foundational papers on risk associated with potable and non-potable reuse. 

Representative Clients

Cadmus Group

Carollo Engineers

City and County of San Diego

County of Orange, CA


Kennedy Jenks Consultants

Kinnetic Laboratories, Inc.

Larry Walker Associates

Monash University Australia

NIWA New Zealand

Orange County Water District

Pegasus Technical Services, Inc.

Province of Ontario, Ministry of the Environment

State of California

State of Florida

State of Washington

Tetra Tech Inc.

US Centers for Disease Control

US EPA Office of Groundwater and Drinking Water

US EPA Office of Science and Technology

US EPA Office of Research and Development

Water Environment Research Foundation

WateReuse Foundation