Welcome to BioAssessment Services

BioAssessment Services (BAS) has been conducting macroinvertebrate-based bioassessment and monitoring since 1999 throughout most of central and northern California.  Experience ranges from assessments of small urban streams associated with stormwater monitoring programs to regulated river systems associated with the hydropower licensing process.   BAS is operated by Tom King as a sole proprietorship and is a registered microbusiness with the State of California’s Department of General Services.  BAS utilizes the assistance and expertise of subcontractors when needed for conducting all phases of macroinvertebrate-based bioassessment including sampling, sample processing, analysis and report preparation.  BAS often functions as a subcontractor to larger firms conducting comprehensive waterbody assessments. 

BAS has experience serving a diverse clientele including non-profit foundations, city, county and state governments, water districts, utilities, and private environmental science and planning firms.

Download BioAssessment Services Brochure here.