Atascadero Mutual Water Company (AMWC) serves over 30,000 residents of Atascadero, with over 10,000 service connections. Our mission is to provide our shareholders with a continuous, safe, and reliable supply of water at a reasonable cost, while providing the highest level of customer service.


Quick Links

Notice Concerning Proposed Water Rate Increase

Please click here to view the notice

Remote Meetings

To reduce the risk of exposure to COVID-19 to the public and our staff, meetings will be held remotely until further notice.

Arrangements have been made to ensure the meetings can be attended by the public via Zoom. Registered attendees may join the meetings using a computer or phone.

Please register here if you wish to attend one of our remote meetings. 

2020 Water Shortage Contingency Plan and Urban Water Management Plan Update

Atascadero Mutual Water Company (AMWC) is currently in the process of preparing a Water Shortage Contingency Plan (WSCP) and updating its Urban Water Management Plan (UWMP) as required by the California Department of Water Resources.

The WSCP and UWMP update are prepared by urban water suppliers to support their long-term resource planning and ensure adequate water supplies are available to meet existing and future water demands over a 20-year planning horizon. The plans include an analysis of projected population growth, current and future water demands, as well as water supply and pumping data.

Documents (PDF):

Public Notice - UWMP (Draft) - WSCP (Draft)

Coronavirus and Drinking Water

The COVID-19 virus has not been detected in drinking-water supplies. Based on current evidence, the risk to water supplies is low. Customers can continue to use and drink water from their tap as usual. Click here to learn more.

Annual Water Quality Report (CCR)

We are pleased to present our annual water quality report covering all testing performed between January 1 and December 31, 2019. AMWC is dedicated to producing drinking water that meets all state and federal standards. We are committed to meeting the state's water source protection, water conservation, and community education goals, and serving the needs of all of our water users. Click here to view report [PDF]

PFAS Water Contamination

On May 21, 2019, Atascadero Mutual Water Company (AMWC) received the results of water samples that were analyzed for polyfluoroalkyl substances (PFAS) under the EPA's Unregulated Contaminant Rule. Click here for the latest information [PDF]

Paperless Billing Option

AMWC now has a paperless billing option for customers who don’t wish to receive a paper bill, and/or who wish to avoid the $1.00/month fee for duplicate bill service.  After enrolling, you will receive an e-mail notification when your bill is available for viewing each month.

Update Contact Information & Automatic Notification Preference

Would AMWC be able to reach you regarding important information about your water service?

Please update your contact information here and specify your options for receiving automatic notifications. Notifications can alert customers in the event of boil water alerts, Shut-Off Notifications, disruption in service due to emergency or planned shutdowns, unusually high water usage, etc.

Rate Survey

Each year, AMWC performs a survey of the water rates [PDF] used by other water purveyors in San Luis Obispo County.  The average monthly water use for a single-family residence in AMWC’s service area is used for comparison.  The actual average monthly use in other water purveyor’s service areas varies due to costs and/or other conditions.

Water Meter 101

Wondering how to read your meter or detect a leak? Check out our Consumer Info page to learn about meters, leaks, and more!

Annual Financial Newsletter

Click here [PDF] to view AMWC’s Annual Financial Newsletter.


8:00 AM - 4:00 PM, Mon - FRI

Email response during business hours only

Emergency Only After-HourS  

(805) 466-9004

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