Nitrate and Phosphorous Concentration
- Plants need nitrates and phosphorus to grow
- Increased nitrates = increased algae growth. Too much algae growth can lead to less oxygen in the water and kill other organisms
- High levels can be toxic to humans, especially infants. Healthy levels are below 1mg/L
- The major sources of nitrates in surface water include runoff contaminated with fertilizers, septic tank leakage, and sewage. Phosphates, on the other hand, usually enter waterways from human and animal waste, laundry, cleaning, and industrial waste.