Does freshly squeezed orange juice require a hashgacha? (ex: the freshly squeezed orange juice at Whole Foods)
From the cRc juice list:
Fresh (refrigerated) orange juice should preferably be purchased with reliable kosher certification. If that is not available or there is a particular brand that is considerably lower in price, one may purchase orange juice that is not certified, as long as it does not contain any kosher-sensitive ingredients (e.g. colors, flavors, other juices).
practicalhalacha.com "When Hechsher NOT Needed" writes:
Pure fruit juice NOT made from concentrate (such as orange or pineapple juice) does not normally require a hechsher (except for grape juice, which always requires a hechsher!).
However, see ShulchanAruchHaRav.com's "Juice without a hashgacha" for additional considerations.
As always, safest bet is to CYLOR.