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: hearthstonewater@hearthstonecompany.com Mailing Address: Hearthstone Water PO Box 2229 Great Falls, MT 59403 For Valley Utilities and Tierra Buena Customers Call Us: 623.935.11008:00 – 4:00 pm Tuesday- Friday After Hours Emergencies: 623.935.1100, press 9. An after hours call center representative will assist you. Email Us: customerservice@hearthstonecompany.com Mailing Address: 6808 N. Dysart RoadSuite 112Glendale, 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.
