Walnut Hill Water Authority has partnered with NexBillPay to extend an additional payment option for customers interested in using their check, debit card or credit card to pay their bill. NexBillPay is a trusted third party automated payment service that allows you to pay your bill online. Bill payments can be made at any time, 24/7/365. You will need your customer number from your printed billing statement to complete your bill payment. You may request your customer number by calling Walnut Hill Water Authority. NexBillPay charges a small service fee for each transaction. How do I use this Service? Customers will need the following to pay their bill: 1. Walnut Hill Water Authority customer number (located on your billing statement). 2. The balance owed on your bill (also located on you