Score: +10 (14/5/4)
Sonoma County Grand Jury • 2018-2019

Will There Be Water After an Earthquake?

Published: May 15, 2019 17 pages
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Findings and Recommendations 10 findings

F1
l. Sonoma Water and its water contractors maintain a well-designed system and have made significant progress in mitigating earthquake risks. Ongoing efforts are needed to reduce remaining risks.
No recommendations for this finding
F2
Sonoma County relies primarily on a single wholesale provider for its water. Sonoma Water, which delivers water under contract to cities and water districts.in Sonoma County and northern Marin County, may be without sufficient resources to meet all emergency needs.
No recommendations for this finding
F3
In the event of a major earthquake, water supplies are likely to be significantly disrupted for extended periods of days or weeks, although reduced water supplies may be provided through alternative means. Full recovery of systems could take longer.
No recommendations for this finding
F4
Measures implemented by Sonoma Water to reduce the risk of critical water shortages following a major earthquake have relied heavily upon state and federal grant funds, but implementation has fallen behind the schedules proposed in the LHMP. A more rapid reduction of risks could be achieved through water rate adjustments.
No recommendations for this finding
F5
Consistent with FEMA recommendations, residents need to maintain their own emergency source of water to meet their personal needs for more than the three days frequently stated by officials
Related Recommendations (1)
R3
Sonoma Water and water contractors derive and publicize more realistic outage periods and provide updated information to the public, by December 31, 2019. (F5, F6)
F6
More public outreach is needed to educate water users to their risks and individual responsibility for earthquake preparedness.
Related Recommendations (1)
R3
Sonoma Water and water contractors derive and publicize more realistic outage periods and provide updated information to the public, by December 31, 2019. (F5, F6)
F7
Coordination between Sonoma Water and its contractors needs to improve by increasing training exercises, mutual aid training, and systems information exchange. 13
Related Recommendations (1)
R4
Sonoma Water improve coordination with water contractors, including field exercises, by December 31,2019. (F7)
F8
Because operating pressures must be maintained throughout the system, water contractors have limited ability to curtail non-essential water uses without compromising availability of water for critical applications such as fire suppression and hospital use.
Related Recommendations (1)
R5
Water contractors study options for making local systems more adaptable under emergency conditions - such as dedicated supply loops, digitally monitored metering, or automatic shut-down valves, by December 3 1, 2019. (F8)
F9
Sonoma Water's planning for earthquake response, supplies, repairs, and restoration of water depends significantly on institutional repair knowledge concentrated in a few long-term employees, but lacks adequate documentation such as manuals for standard operating procedures.
Related Recommendations (1)
R6
Sonoma Water prepare and maintain one or more SOPs (Standard Operating Procedures) for the restoration of water deliveries specifically for an earthquake; SOPs should be updated annually or whenever there are changes to procedures, by December 31,2019. (F9)
F10
Sonoma Water's estimate of three days to return to service following an earthquake is conditional on the availability of suitable repair parts, aqueduct pipe, joints, pumps and valves. The Grand Jury found the inventory of emergency supplies is sparse and the inventory list is incomplete and out-of-date.
Related Recommendations (1)
R2
Sonoma Water maintain inventory lists with current goals for items, quantities, locations, and sourcing; and improve stockpiling accordingly, by Decembet 31,2079. (Fl0)

Agency Responses 3

Government agencies' official responses to this report's findings and recommendations. Click on a response to see the structured breakdown.

No Responses Found 1

Government entities assigned to respond to this report. No response documents have been linked in our database.

Sonoma County Water Agency Special District