Home Departments Emergency Preparedness EMERGENCY PREPAREDNESS Stay Safe and Stay Informed In the event of an emergency, Mesa Water District (Mesa Water®) is prepared to continue providing high-quality drinking water. Our business hours are: Monday – Thursday 7:30 a.m. – 5 p.m., and Friday 8 a.m. – 5 p.m. For water bill payments, Mesa Water customers can: Register for online bill pay service here. Pay by phone at 877.493.5093 Contact Customer Service at 949.631.1200 or firstname.lastname@example.org Use the payment drop box located outside of Mesa Water's office building As always, Mesa Water District is fully engaged in ensuring your tap water is clean, safe and reliable 24/7. Mesa Water Notify Receive Notifications from Mesa Water® How to Receive County Disaster Alerts Find out how to sign up for text or email alerts. Emergency Drinking Water Supplies How much water should you save? How should it be stored? Get the answers. Your Water Service During a Power Outage Find out how Mesa Water District can provide high-quality drinking water in the event of a power shutoff.