1-800-790-3201 Want To Enroll? Enroll Online Coverage available in: Contact an agent today! Need to chat with a National Water Company representative? Simply fill out the contact form, or call 1-800-790-3201. Our agents can answer any questions you have, adjust or cancel existing coverage, or enroll new coverage over the phone in about 5 minutes. You can also enroll yourself with the link above! Please enable JavaScript in your browser to complete this form.Your Name *Your Email *Phone *Your Message *MessageSend Need to file a claim? Call 1-800-790-3201 Mailing Address: National Water Company2730 W Marina DriveMoses Lake, WA 98837 Phone: 1 (800) 790-3201 Email: info@nationalwatercompany.com Contact Us Today!