Eutrophication & Hypoxia Tracker | AP Environmental Science

HYPOXIC DEAD ZONE

Algae Biomass

0 kg

BOD (Demand)

2.0 mg/L

DO (Dissolved O2)

8.5 mg/L

Agricultural Runoff (N & P) Level

Key Thresholds

Healthy DO: > 5.0 mg/L

Hypoxia: < 2.0 mg/L

Live Commentary

Observation: With 0% runoff, the water is clear and Dissolved Oxygen (DO) is high. Begin pumping excess fertilizer (Nitrogen/Phosphorus) from the farm into the lake block to see the catastrophic chain reaction.