Need to fix drip!

We have a drip in the bathtub. We put a bucket in there to catch the water. Every bit counts, considering we're in a historic drought in Georgia and all outdoor watering (other than food gardens) is banned.

Below is a picture of the bucket with the water collected between 7:45am and 7:45pm. It shows 6 inches of water.

I used this to water the leyland cypresses that flanks our front door.

That's a lot of water. I need to fix that drip.