Article R1322-42 of the French Public Health Code
Under the provisions of article R. 1322-14, the Prefect may require the operator, on a proposal from the Director General of the Regional Health Agency, to carry out analyses in addition to those defined in article R. 1322-41 in the following cases: 1° The water does not comply with the quality criteria set by the order mentioned in article R. 1322-3; 2° The water shows signs of instability or deterioration;…