I don't know if Lowe's takes old paint, but Tempe has a "hazardous materials" drop off point near University Dr and McClintock Dr in Tempe. Not open much (only Fri and Saturday), search for "Tempe household products collection center" for more information. Must be Tempe resident, but the website has info for other cities.
Ask someone in the paint and let me know, because I have paint that I would like to get rid of.
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