Water Main Incident Near Cuesta Park – 4/27/26 Update

10:00 p.m. Monday, April 27, Update: The City of Mountain View has declared a State of Emergency for the Cuesta Park area water main incident.

The emergency declaration was made on Saturday, April 26, and the City Council will ratify the declaration at their Tuesday, April 28, meeting. This declaration will allow the City to seek reimbursement from the State of California and federal government for expenses related to this incident, to the extent allowed by law.

Since Friday night (4/24/26), the City's Emergency Operations Center has been activated, which opens up more resources for responding to the incident.

Approximately 67 households remain under a "Do Not Drink" order tonight (view updated map below). The water in the affected area is turned on for toilet flushing use only.

The "Do Not Drink" order is isolated for the area near Cuesta Park. The water in the rest of Mountain View continues to meet state and federal quality standards.

In addition to flushing the water main in the street, City crews have flushed each affected property's water service to their front yard. City crews went to each affected household to provide written guidance on how to flush the indoor house plumbing and answer residents' questions. On Monday, crews conducted more comprehensive drinking water safety testing.

Restoring safe drinking water to the affected area is anticipated for mid-to-end of the week, pending test results of the latest water samples and approval by the State Water Resources Control Board. On Sunday, April 26, two of the five water samples came back positive for bacteria. The tests were for coliform and E. Coli. The lab has indicated that E. Coli was not present in the samples and that coliform was present in two of the five samples.

The water main incident happened on Friday, April 24, when the contractor, C2R Engineering, was performing water main replacement activities at the intersection of Cuesta Drive and Bonita Avenue.

Temporary Lodging Available for Impacted Residents

The City has partnered with several local hotels to provide temporary lodging for residents impacted by the recent incident.

If you need a place to stay during the impact period, you may contact one of the following locations (all accommodations are subject to each hotel's availability):

1. Super 8 Mountain View, 1665 W El Camino Real, Mountain View, CA | Phone: 650-969-9641
2. Ramada by Wyndham Mountain View, 55 Fairchild Dr, Mountain View, CA | Phone: 650-967-6856
3. Days Inn Mountain View, 850 Leong Dr, Mountain View, CA | Phone: 408-915-3669
4. Shashi Hotel Mountain View, 1625 N Shoreline Blvd, Mountain View, CA | Phone: 650-420-2600
5. TownePlace Suites, 606 S. Bernardo Avenue, Sunnyvale, CA | Phone: 408-733-4200

What You Need to Bring:

1. A valid government-issued photo ID
2. The ID must show an address that matches the impacted residence
3. A credit card for incidental charges

Important Notes:

1. Hotel accommodations are available for eligible residents only.
2. Room availability is not guaranteed and will depend on each hotel's current occupancy.
3. Please inform the front desk that you are part of the City's temporary lodging program when checking in.

Ongoing Hotel Coordination:

The City continues to work with additional local hotels and motels to expand available lodging options. Updates will be provided as new locations are confirmed and added to the list.

Alternatively, the City will reimburse impacted residents up to $192+tax/night if they choose to use a different hotel of their choice.

Questions or Assistance:

If you have any questions, please call 650-903-6081 and press 2.

For more information, including resources for residents, visit MountainView.gov/CuestaWaterMain.

Next Update
The next incident update is scheduled for 11:00 a.m. Tuesday, April 28.

Media Inquiries
For media inquiries, email [email protected] or call Lenka Wright, Chief Communications Officer, at 650-903-6615.