California Civil Code sections 3479 -3480

3479.  Anything which is injurious to health, including, but not
limited to, the illegal sale of controlled substances, or is indecent
or offensive to the senses, or an obstruction to the free use of
property, so as to interfere with the comfortable enjoyment of life
or property, or unlawfully obstructs the free passage or use, in the
customary manner, of any navigable lake, or river, bay, stream,
canal, or basin, or any public park, square, street, or highway, is a
nuisance.

(3480.) Section Thirty-four Hundred and Eighty.  A public nuisance
is one which affects at the same time an entire community or
neighborhood, or any considerable number of persons, although the
extent of the annoyance or damage inflicted upon individuals may be
unequal.
 

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