the police power not reasonably related to the health, convenience, comfort, safety and morals of the public. (See Frost v. City of Los Angeles, 181 Cal. 22, 28 [183 P. 342, 6 A.L.R. 468].) [2b] The petition unequivocally alleges Alta-Dena's certified raw milk, despite the presence of staphylococci aureus coagulase positive in small quantity, is not harmful to human beings and is safe for human consumption.
 Respondents, however, rely on the well recognized exception to the general rule that in testing the sufficiency of the pleading on demurrer, matters judicially noticed will be considered and will prevail over contrary allegations contained in the pleading. (Chavez v. Times-Mirror Co., 185 Cal. 20, 23 [195 P. 666]; Livermore v. Beal, 18 Cal.App.2d 535, 540 [64 P.2d 987].) They contend certain regulations, reports and documents of which the court must take judicial notice establish staphylococci aureus coagulase positive is a communicable disease transmitted through milk and since appellant concedes its presence in its certified raw milk, no issue of fact is raised by the petition and the demurrer was properly sustained. We have examined the items and sources upon which respondents rely. Assuming them all to be properly subject to judicial notice and assuming without deciding the statements contained therein must be accepted as true in all instances (See Love v. Wolf, 226 Cal.App.2d 378, 403 [38 Cal.Rptr. 183]; Beckley v. Reclamation Board, 205 Cal.App.2d 734, 741 [23 Cal.Rptr. 428]), we feel none of them meets the fair thrust of *73 the factual allegations contained in the petition. They do not establish the presence of staphylococci aureus coagulase positive in milk in small quantity makes that milk a source of infection for a communicable disease or renders it unsafe for human consumption.
 [4] It is a matter of common knowledge that most of the food we eat and the water we drink is not absolutely pure. Much of it contains small quantities of deleterious substances which, if present in larger quantity, might