Coming June 3, 2026 – MyMesaWater: Reliable Water Service, Made Easier. We’re excited to share that MyMesaWater, Mesa Water’s new online billing and account management system will be launching soon. This upcoming upgrade is designed to make managing your water service easier and more convenient. With MyMesaWater, you’ll be able to view your account, make payments and access helpful tools—all in one modern, user-friendly platform. What This Means for You: A refreshed online portal with improved features and navigation Easier access to billing information and payment history New self-service options, including online Move-In/Move-Out requests The ability to manage multiple accounts with a single login At this time, no action is required. We’ll provide additional details and simple instructions once MyMesaWater is live. You may also notice some updates to your bill format in the future, designed to make it clear and easy to read. We’re Here to Help We’re committed to making this transition as smooth as possible. If you have any questions in the meantime, our team is always here to assist. Contact our Customer Service Department at (949) 631-1200 or stop by our Customer Service desk Monday-Thursday, 7:30 a.m. – 5 p.m. and Friday, 8 a.m. – 3:30 p.m. Thank you for being a valued Mesa Water customer. We look forward to bringing you this enhanced experience soon. Frequently Asked Questions What is MyMesaWater? MyMesaWater is Mesa Water’s new online billing and account portal. It offers a more modern and convenient way to view bills, make payments and manage your account online. Mesa Water customers are encouraged to use MyMesaWater for the easiest and most convenient way to manage their accounts. When will MyMesaWater be available? MyMesaWater will launch June 3, 2026. Customers with an email address on file will receive an email with simple instructions once the system is live, and all customers will also receive information by postcard. If you previously used online bill pay via InvoiceCloud, your account information and logins will remain the same. Do I need to do anything right now? No action is required at this time. Mesa Water will provide additional guidance once MyMesaWater is available for customer access. Do I have to use MyMesaWater? While use of MyMesaWater is not required, Mesa Water customers are encouraged to explore the new MyMesaWater portal. It is designed to provide the easiest and most convenient way to manage your account, access billing information, make payments and use self service tools. Will my bill statement change? Yes, you will notice your Mesa Water bill has been modernized as part of this upgrade. Customers can now use their bill to compare usage from prior billing periods. These changes are designed to make your bill easy to read and understand. Will my water service be affected? No. This upgrade only affects how you manage your account online. Your local, reliable water service will continue as normal. What if my email address on file is outdated? If you believe your email address is not on file with Mesa Water or outdated, please contact Customer Service so it can be updated. Questions for Customers Currently Using InvoiceCloud If I currently use InvoiceCloud to manage my account and pay my bill, will I need to start over? No. Customers who currently use InvoiceCloud will not need to start over. Your account information and billing details will carry over as part of the transition to MyMesaWater. Will I need to create a new account or new login to access the system? When MyMesaWater is ready, you will receive an email with a link to complete the sign up process. Your account information and billing details will carry over as part of the transition to MyMesaWater. Will my payment history still be available? Yes, your billing and payment history up to two years back will continue to be available in the MyMesaWater system. Will my AutoPay settings and saved payment methods transfer? Existing AutoPay settings and payment information will carry over for most customers. Additional guidance will be shared if any action is needed. What if I have multiple accounts? MyMesaWater allows customers to manage multiple accounts in the same manner as the existing platform based on InvoiceCloud. If you wish to utilize this feature, more information/instructions will be available to guide you through the process via our Customer Service department. Who can I contact with questions? Mesa Water’s Customer Service team is here to help: Phone: (949) 631 1200 In person: 1965 Placentia Avenue Costa Mesa, CA 92627 Monday–Thursday: 7:30 a.m. – 5:00 p.m. Friday: 8:00 a.m. – 3:30 p.m. Temporary Online Payment Freeze – Frequently Asked Questions Thursday, May 28 – Wednesday, June 3 Why is online payment temporarily unavailable? As part of the MyMesaWater system upgrade, Mesa Water is moving to a new and improved billing and account management system. During this upgrade, online payments using the current system will be temporarily unavailable from May 28 –June 3. How long will the freeze last? Online payments will be unavailable from May 28 through June 3. Access to online bill pay will be restored once the system update is complete. Following June 1, you will need to login to your new MyMesaWater account to make changes to your online payments. Will my water service be affected? No. This freeze only affects online payments. Your local, reliable water service will not be interrupted. Do I need to take any action? No action is required unless you normally make payments online. If you do, we recommend planning ahead or making your payment early, or using one of the alternate payment options listed below during the freeze. What payment options are available during the freeze? Customers may continue to make payments using: Mail In person cash or check payments at 1965 Placentia Avenue, Costa Mesa, CA 92627 Scheduled payments already set up prior to May 28 These options will remain available throughout the freeze. Will my scheduled payments still process Yes. Scheduled payments set up before May 28 will continue to process as normal and no action is required. Will I be charged late fees because of the freeze? No. Customers will not incur late fees due to the temporary online payment freeze. What if my due date falls during the freeze? If your due date falls between May 28 and June 3, your account will not be negatively impacted by the freeze. Customers are encouraged to make their payment early or use one of the available payment options. Can I make a one-time online payment during the freeze? No. One time online payments will not be available during the payment freeze, between May 28 and June 3. Can I set up or change Autopay or schedule payments during the payment freeze? No. New or changed AutoPay and scheduled payment setups will not be available during the payment freeze. Customers who plan to use AutoPay or scheduled payments are encouraged to set them up or make changes before May 28. Existing scheduled payments will continue to process normally. Can I view my bill or account balance online during the freeze? No. The online payment system will be unavailable during the online payment freeze. Is my account information secure during the upgrade? Yes. The system upgrade is designed to improve the customer experience while maintaining secure handling of account information. Account data transfers behind the scenes with minimal disruption. Will I still receive my bill during the payment freeze? Yes. Customers will continue to receive bills by mail and/or email as they normally do. What should I do if I think my payment didn't go through? If you believe a payment didn’t process correctly or notice an error, please contact Customer Service so our staff can assist you. When will online payments be available again? Online payment access will be restored once the system update is complete after June 3. Payments will then be made through the new MyMesaWater portal at www.MyMesaWater.org. Will my billing cycle or due date change after the upgrade? No changes to billing cycles or due dates are expected as part of the upgrade. Who can I contact for questions or urgent payment issues? Mesa Water’s Customer Service team is available to help: Phone: (949) 631 1201 In person: 1965 Placentia Avenue Costa Mesa, CA 92627 Monday–Thursday: 7:30 a.m. – 5:00 p.m. Friday*: 8:00 a.m. – 3:30 p.m. *Please note, our lobby will be closed on Friday, May 29 while our staff attends training