Bioaccumulation Factor Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 27, 2026Bioaccumulation Factor Calculator
The Bioaccumulation Factor (BAF) measures how much more concentrated a substance becomes inside a living organism compared to its surrounding environment - a key metric for assessing environmental risk from persistent pollutants.
BAF = Concentration in Organism / Concentration in Environment
Example
50 mg/kg in organism tissue, 0.05 mg/L in surrounding water:
BAF = 50 / 0.05 = 1,000 (high bioaccumulation)
Reading the Score
| BAF Value | Interpretation |
|---|---|
| < 1 | Substance is not concentrating in the organism |
| 1 - 1,000 | Moderate bioaccumulation |
| > 1,000 | High bioaccumulation - substance strongly concentrating |
Real-World Relevance
High BAF values are common for persistent, fat-soluble pollutants like heavy metals, certain pesticides (DDT being the classic historical example), and industrial chemicals that organisms absorb faster than they can excrete or metabolize - these substances can reach tissue concentrations far higher than their environmental concentration would suggest, which is why BAF is a standard screening metric in environmental risk assessment.