Water quality is assessed in accordance with the provisions of the Public Health Code.
Bathing water quality is assessed using two types of indicators: microbiological (bacteria) and physico-chemical:
- The microbiological analyses carried out focus on germ (bacteria) count, as these are indicators of faecal contamination. These are micro-organisms normally present in the intestinal flora of mammals and man in particular. Their presence in water denotes faecal contamination in the bathing areas. In this respect, they are an indicator of pollution from wastewater and reflect the likely presence of pathogens. The higher the concentrations of such germs, the greater the health risk.
The bacteria sought in laboratory analysis are:
Under certain circumstances, should the threshold quality values be exceeded or wastewater runoff pollution be found, tests may be performed to identify other germs (salmonella, enteroviruses, etc.).
- total coliforms;
- Escherichia coli;
- intestinal enterococci.