Public Peeing
I don’t know anyone who this ever happened to; sort of a worst-case scenario you could be charged with indecent exposure.
§13-1402. Indecent exposure; exception; classification
A. A person commits indecent exposure if he or she exposes his or her genitals or anus or she exposes the areola or nipple of her breast or breasts and another person is present, and the defendant is reckless about whether the other person, as a reasonable person, would be offended or alarmed by the act.
B. Indecent exposure does not include an act of breast-feeding by a mother.
C. Indecent exposure to a person who is fifteen or more years of age is a class 1 misdemeanor. Indecent exposure to a person who is under fifteen years of age is a class 6 felony.
And supposing you were convicted, you would have to register as a sex offender (but only after at least 2 repeated incidents):
§13-3821. Persons required to register; procedure; identification card; definitions
A. A person who has been convicted of a violation or attempted violation of any of the following offenses… shall register with the sheriff of that county:
15. A second or subsequent violation of indecent exposure to a person under fifteen years of age pursuant to section 13-1402.
17. A third or subsequent violation of indecent exposure pursuant to section 13-1402.
Meanwhile, some threatened public nudity in the news from, of course, Tucson.