Call Us: 623.219.4740 8:00 – 4:00 pm Mountain Time Monday - Friday After Hours Emergencies: 623.219.4740, press 9. An after hours call center representative will assist you. Email Us: customerservice@hearthstonecompany.com Payment Mailing Address: Hearthstone Water PO Box 7411382Chicago, IL 60674-3382 Mailing Address for Non-Payments: Hearthstone Water 6808 N. Dysart Rd., Ste 116Glendale, AZ 85307 For Upper Michigan Water Company Customers Call Us: 906.337.3502 After Hours Emergencies: 906.337.3502We are available 24/7 to respond to water emergencies Mailing Address: Upper Michigan Water Company311 Fifth StreetCalumet, MI 49913 Visit uppermichiganwater.com for more information.
