The mayor of the city is authorized to appoint special policemen with such compensation as the city council may fix, who shall have powers of a constable under the laws of this state, and who may arrest with, or without, warrant, any person committing within the territory provided by this chapter, any offense declared by this chapter to be against the purity of the water supply, or any rule or regulation as provided in this chapter. Such policeman shall be and he is hereby authorized to forthwith take any such person arrested for such violation aforesaid before any court having jurisdiction thereof to be proceeded with according to law.