If you are looking for houston co utilities, please check our official links below: Houston County Water Department https://www.houstoncountyga.org/business/water.cms Online Services - Houston County https://www.houstoncountyga.org/online-services/online-payments.cms Online Services. Utility Payments. For Utility payments the maximum online credit card or e-check payment amount is $300. If you need to pay a larger...