Trumbull, Conn., Mun. Code ch. 10 § 10-5

(a) No owner or other person shall occupy or let to another person any vacant dwelling or dwelling unit unless it and the premises are clean, sanitary, fit for human occupancy, and comply with all applicable legal requirements of the state and the town.
(b) Every owner of a dwelling containing two (2) or more dwelling units shall maintain in a clean and sanitary condition the shared or public areas of the dwelling and premises thereof.
(c) Every occupant of a dwelling or dwelling unit shall maintain in a clean and sanitary condition that part or those parts of the dwelling, dwelling unit and premises thereof that he occupies and controls.
(d) Every occupant of a dwelling or dwelling unit shall dispose of all his rubbish in a clean, sanitary and safe manner.
(e) Every occupant of a dwelling or dwelling unit shall dispose of all his garbage and any other organic waste which might provide food for rodents in a clean, sanitary and safe manner and, if a container is used for storage pending collection, it shall be rodentproof, insectproof and watertight.
(f) Every owner of a dwelling containing three (3) or more dwelling units shall supply adequate facilities or containers for the sanitary and safe storage and/or disposal of rubbish and garbage. In the case of single- or two-family dwellings, it shall be the responsibility of the occupant to furnish such facilities or containers.
(g) The owner of a dwelling or dwelling unit shall be responsible for providing and hanging all screens and double or storm doors and windows whenever the same are required under the provisions of this chapter or any rule or regulation adopted pursuant thereto, except where an agreement between the owner and occupant has been arranged in writing. In the absence of such agreement, maintenance or replacement of screens, storm doors and windows, once installed in any one (1) season, become the responsibility of the occupant.
(h) Every occupant of a dwelling containing a single dwelling unit shall be responsible for the extermination of any insects, rodents or other pests therein or on the premises; and every occupant of a dwelling unit in a dwelling containing more than one (1) dwelling unit shall be responsible for such extermination whenever his dwelling unit is the only one infested. Notwithstanding the foregoing provisions of this subsection, whenever infestation is caused by failure of the owner to maintain a dwelling in a ratproof or reasonable insectproof condition, extermination shall be the responsibility of the owner. Whenever infestation exists in two (2) or more of the dwelling units in any dwelling, or in the shared or public parts of any dwelling units, extermination thereof shall be the responsibility of the owner.
(i) Every occupant of a dwelling unit shall keep all plumbing fixtures therein in a clean and sanitary condition and shall be responsible for the exercise of reasonable care in the proper use and operation thereof.