How to check prepaid water balance?

Excuse me, I have a question about checking the balance of my prepaid water account. Could you please tell me how to do that? I've been trying to find out, but I'm not quite sure where to start. Is there a specific website or app that I should use? Or perhaps a customer service number that I can call? I'd really appreciate your help in clarifying this matter for me. Thank you in advance for your assistance.