1914

• ACWD organized - The first District founded under the Caminetti Bill (County Water District Act of 1913).

1930

• Purchase of the Alvarado Pumping Station from EBMUD places ACWD in the Water Distribution business.

1938

• Purchase of Irvington Water System.

1939

• Purchase of Centerville Water System.

1940

• Purchase of Gallegos (Mission San Jose) Water System.

1949

• Filed for rights for surplus water from Alameda Creek.

1951

• Mission San Jose area annexed.

1956

• $4,290,000 Improvement District No.1 Bond issue approved for distribution system improvements.

1958

• Office Center opened on Fremont Boulevard.

1961

• ACWD signed contract with the Department of Water Resources for State Project Water.

1962

• First delivery of State Water Project water from South Bay Aqueduct. (ACWD was the first contractor to receive water from the State Water Project.)

1963

• Seven (VII) Hills annexation.

1964

• Contract with San Francisco for Hetch Hetchy water supply.
• $4,950,000 Improvement District No. 3 Bond issue approved for distribution system improvements.

1967

• Appian Tank completed.

1971

• Manuel J. Bernardo Softening Plant placed in operation to soften ground water supply.
• Voters mandate fluoridation of water.

1972

• Rubber Dam No. 1 installed to increase groundwater recharge capacity. (This was the first such installation in the United States, and also the world's largest inflatable dam.)
• Army Corps of Engineers completed widening and straightening of Alameda Creek allowing for a larger percolation area for the groundwater supply and providing a channel to the Bay for heavy storm water discharge.
• Alameda Reservoir completed.

1973

• $2,850,000 Improvement District No. 5 Bond issue approved for acquisition of Citizens Utilities Company (CUC), Niles-Decoto system, and other systems.
• California Department of Fish and Game institutes regularly scheduled stocking of Alameda Creek with trout.

1974

• Aquifer Reclamation Program started in order to remove saltwater from the groundwater basin.

1976

• Mission San Jose Water Treatment Plant placed in operation to treat State Project water for distribution system use.
• Agreements with East Bay Regional Park District, Alameda County Flood Control and City of Fremont establish recreational areas along Alameda Creek and Percolation Ponds.
• New Chemistry Laboratory building constructed to provide facilities for testing water quality to meet federal and state standards.
• Rubber Dam No. 2 installed.

1977

• Water Shortage Emergency declared. Voluntary water rationing adopted.

1979

• Hidden Valley tank completed.

1981

• Improvement District No. 5 (formerly CUC) system major improvements completed.

1982

• First group of wells drilled to prevent saltwater intrusion as part of Salinity Barrier Program.

1984

• Twenty-five year contract signed with San Francisco Water Department.

1985

• New Office/Operations Center constructed at South Grimmer Boulevard site.

1986

• 21 Million Gallon, M.P. Whitfield Reservoir completed.

'

1987

• District Twenty Five Year Capital Improvement Program adopted.
• Vineyard Heights Tank completed.

1988

• First phase of District telemetry (SCADA) system installation completed.

1989

• Rubber Dam No. 3 constructed to increase groundwater recharge.
• CHP takes administrative action declaring Niles Canyon Road off limits to vehicles carrying hazardous materials.

1990

• Alameda Creek Watershed Environmental survey completed.
• Pits T-1 and T-2 recharge facilities purchased.

1991

• $30,000,000 Construction contract for Water Treatment Plant No. 2 was awarded.
• Water Shortage Emergency declared, Drought Management Program adopted.

1992

• Blending begins, combining groundwater and San Francisco water supplies to provide a more uniform, lower hardness water supply.
• Purchase of Pit H recharge facility finalized, completing the land acquisition for the Quarry Lakes Groundwater Recharge and Recreational Area.
• Automated Water Quality Monitoring Station installed on Alameda Creek.
• $24,330,000 in Certificates of Participation for capital facilities financing issued.

1993

• Water Treatment Plant No. 2 opened, 28 million gallon capacity (hydroelectric generation, ozone disinfection and mechanical solids dewatering included).
• Drought Management Program rescinded.

1994

• Distribution System Water Quality Monitoring Sampling Stations installed at 44 above ground and 88 below ground locations.

1995

• $22,200,000 in Certificates of Participation for capital facilities financing issued.
• Integrated Resources Plan adopted.

1996

• Avalon Tank completed.

1997

• Rehabilitation of Quarry Pits.

1998

• Blending/Chemical Storage and Handling Facility put online.

2003

• Newark Desalination Facility put online.

2005

• New Water Quality Lab completed.