Easter lilies are not safe for cats at all.
They aren’t. Even a tiny amount of pollen, leaf, or water from the vase can cause fatal kidney failure. There is no “safe” Easter lily around a cat.
Symptoms usually show up within a few hours: vomiting, drooling, loss of appetite. Then things get quiet for a day or two — which is dangerous because the kidneys are failing silently. You might notice increased thirst and urination, then lethargy and dehydration. By the time you see severe symptoms, it’s often too late.
If you suspect your cat licked or nibbled any part of an Easter lily, go to the vet immediately. Do not wait for symptoms. Do not try home remedies. Time is the difference between a full recovery and a very bad outcome.
Keep lilies out of the house entirely if you have a cat. It’s not worth the risk.