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Monte Vista Water District's water supply comes from local groundwater, imported water from northern California, and purchased water from San Antonio Water Company and the City of Upland.

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Wellhead treatment of groundwater well to remove nitrates

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Public Documents

State Drought Self‑Certification

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Individual and Aggregate Self-Certification Documentation

The following documents were submitted to the State Water Resources Control Board on June 22, 2016 as part of the District's self-certification of supply reliability under California Code of Regulations, title 23, section 864.5.

The District and the cities of Chino, Chino Hills, Ontario, and Upland submitted an aggregated conservation standard as member agencies of the Water Facilities Authority.

The submitted documents linked below demonstrate surplus available supplies to meet projected demands over the next three years under continued drought conditions.

Worksheet 1: Total available water supply for individual water supplier (Monte Vista Water District)
Worksheet 2: Calculation for Aggregated Self-Certification Conservation Standard (Water Facilities Authority member agencies, including Monte Vista Water District)
Supporting analysis and calculations
Signed Certification Form (Monte Vista Water District)
Signed Aggregate Certification Letter Agreement (Water Facilities Authority member agencies, including Monte Vista Water District)

Links to Wholesale Water Supply Information

The following are links to wholesale water supply information posted by regional wholesale agencies which provide support for the District's individual and aggregate self-certification: