| A | B |
|---|
| Nitrate | caused by fertilizers |
| phosphate | caused by detergents |
| turbidity | measures how clean or dirty the water is |
| pH | measures how acidic or alkaline the water is |
| BOD | measures the amount of oxygen that bacteria use |
| Dissolved oxygen | measures the amount of oxygen in the water, is effected by temperature and movement |
| Temperature | drastic temperature differences could cause thermal pollution |
| Macroinvertebrates | organisms living on stream bottoms. thay can be useful in determining water quality |
| sensitive insects | insects that can only live in very good water |
| facultative insects | insects that can live in water that has some pollution |
| tolerant insects | insects that can live almost anywhere |
