PDFRCW 70A.220.020
Plastic bottle or rigid plastic container—Labeling requirements.
Except as provided in RCW 70A.220.030(2), after January 1, 1992, no person may distribute, sell, or offer for sale in this state a plastic bottle or rigid plastic container unless the container is labeled with a code identifying the appropriate resin type used to produce the structure of the container. The numbers and letters used shall be as follows:
(a) [(1)] 1.= PETE (polyethylene terephthalate)
(b) [(2)] 2.= HDPE (high-density polyethylene)
(c) [(3)] 3.= V (vinyl) or PVC (polyvinyl chloride)
(d) [(4)] 4.= LDPE (low density polyethylene)
(e) [(5)] 5.= PP (polypropylene)
(f) [(6)] 6.= PS (polystyrene)
(g) [(7)] 7.= OTHER
NOTES:
Finding—Intent—2021 c 313: See note following RCW 70A.245.010.