Sure that's fine, especially since you are just using water. Dr. Karen Becker suggests rinsing paws with water when dogs come in from outside to help allergies. It gets the pesticides and nasty stuff that we humans use on lawns and in our environment off of their paws.
Yep, like Elaine mentioned, it's good to rinse paws for allergy issues. I always rinse/wash paws daily after walks. Mandy has seasonal allergies. I also use a product from Spa Lavish that's a bubble bath treatment for paws.
I always clean Baci's paws either with baby wipes but a few times a week i use a Aloe and Oatmeal shampoo on his paws ..I usually hold him over the sink because i do not want any other part to get to wet i get his front paws a little wet then add a dab of shampoo than one by one rinse than do the same with his back paws..I can not believe how dirty his little paws get just going around the block...
In the morning i even try to time his walks according to when the sidewalks are just watered down and getting dry so there isn't so much dirt..