Currently there are several methods to measure the quality of water in aquatic bodies.
The traditional method is through physicochemical indicators. With this method it is evaluated that the parameters do not exceed the limits established in the regulations, for the protection of aquatic life. However, it is not possible to evaluate the biological effect on aquatic organisms.
Biological methods allow to evaluate responses on aquatic organisms, through different evaluations, such as:
- Indicator species: tolerant or sensitive to pollutants, based on observations in the field.
- Structure of the community of organisms in a determined place, with respect to reference conditions
- Physiological changes
- Acute toxicity
- Chronic toxicity
- Other effects
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