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Howell Mountain Mutual
Water Company
P.O. Box 9
Angwin, CA  94508
Office Phone:  707.965.2205  - Fax:  707.965.2655
email: hmmwco@napanet.net
Office Hours: M-F 9:30 a.m. -3:30 p.m.

 Very Important!
Please update your current phone numbers and e-mail address as we are working on updating our files so we can better serve you.
Go to the FORMS tab then CUSTOMER INFORMATION FORM.  


Next Board Meeting
July 23, 2019
6:30 p.m.


** NEW convenient payment drop box located inside the Howell Mountain Market.** 
(inside the main entrance to the left)


E-mail billing is now available.  Please contact the office to sign-up.
ACH payments are now being accepted.  Authorization Form is located under the forms tab.
​Please call office for more information.

If you are not a customer but would like to become a HMMWC member, which allows you to vote in Board elections and By-laws changes.  ​Please fill out a membership application and return it to our office.