Town, city and borough directors of health shall, when in their judgment health may be menaced or impaired through a water supply, send, subject to the approval of the Department of Public Health, samples of such water to said department for examination and analysis. Said department shall perform such examination and analysis without charge unless such town, city or borough is to be reimbursed for the expense of any such examination and analysis, and in such event a fee shall be charged in accordance with a schedule of fees to be established by the Commissioner of Public Health, based upon nationally recognized standards and performance measures for such examination and analysis. Any person, firm or corporation which operates or maintains a laboratory in which any determination, examination or analysis is made of any sample of water or sewage as a basis for advice as to the sanitary quality of such water or sewage or as to any possible danger to health involved, unless such laboratory has been approved specifically for that purpose by the Department of Public Health, after meeting the requirements established by said department, shall be fined not more than one hundred dollars.