United States Postal Service (USPS)
Southwestern Research Station
PO Box 16553
Portal, AZ 85632
UPS and FedEx
Southwestern Research Station
2003 West Cave Creek Road
Portal, AZ 85632
If the delivery system does not accept “Portal,” please use “San Simon, AZ 85632."
When shipping packages to yourself, please address to “YOUR NAME, c/o SWRS…"