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Local Name and Number and Website if available
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| AFGE Local 1122 |
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| AFGE Local 2391 |
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| AFSCME Local 444 |
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| AFSCME Local 512 |
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| AFSCME Local 2019 |
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| AFSCME Local 2428 |
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| AFSCME Local 2620 |
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| AFSCME Local 2700 |
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| AFSCME Local 3993 |
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| Air Transport Employees #1781 |
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| Amalgamated Transit Union #192 |
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| Amalgamated Transit Union Local 1555 |
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| Amalgamated Transit Union Local 1605 |
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| American Postal Workers, East Bay Area Local |
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| Asbestos Workers Local 16 |
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| Automotive Machinists Lodge 1173 |
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| Bakery, Confectionery & Tobacco Workers Union Local 119 |
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| Boilermakers Union Local Lodge 549 |
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| Boilermakers Local D 5 8 3 |
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| Building & Construction Trades Council of Contra Costa |
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| Butchers Union now UFCW5 |
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| California Faculty Association |
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| California State Employees Assoc. |
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| Carpenters, Northern California Regional Council |
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| Carpenters Union Local 152 |
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| Cemetery Workers & Greens Attendants Union Local 265 |
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| Communications Workers Local 9400 |
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| Communications Workers Local 9409 |
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| Communications Workers Local 9415 |
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| Diablo Valley Federation of Teachers, Local Union 1902 |
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| East Bay Automotive Machinists Lodge 1546 |
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| Electrical Workers IBEW Local 302 |
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| Electrical Workers IBEW Local 1245 |
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| Engineers & Scientists of California IFPTE Local 20 |
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| SEIU United Healthcare Workers |
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| Hod Carriers Local 166 |
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| Hotel Employees & Restaurant Employees Local 2850 |
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| IAFF (Firefighters), Local 1230 |
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| IAM, Local 1173 |
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| IATSE Local 107 |
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| IASTE Local 169 |
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| ILWU Northern California District Council |
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| ILWU Local 6 |
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| ILWU Local 10 |
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| ILWU Local 34 |
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| Inlandboatmen's Union |
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| Ironworkers District Council |
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| Ironworkers Local 378 |
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| Laborers International Union Local 324 |
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| Laborers International Union Local 886 |
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| Letter Carriers, National Association of, Branch 1111 |
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| Machinists Automotive Trades, District Lodge 190 |
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| Machinists Lodge 1584 |
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| Marine Engineers Beneficial Association |
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| Maritime Trades Port Council |
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| Masters, Mates & Pilots, Pacific Maritime Region |
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| Northern California Newspaper Guild, Local 52 |
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| Office & Professional Employees Union, Local 3 |
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| Office & Professional Employees Union, Local 29 |
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| Office & Professional Employees Union, Local 277 |
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| PACE Local 8-326 |
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| Painters Union Local 741 |
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| Pile Drivers Local 34 |
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| Pittsburg-Antioch Fed. Of Teachers |
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| Plasterers' & Cement Masons' Local 300 |
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| Plumbers & Steamfitters, UA Local 159 |
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| Plumbers & Steamfitters, UA Local 342 |
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| Professional & Technical Engineers IFPTE Local 21 |
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| Roofers and Water Proofers Local 81 |
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| Sailors Union of the Pacific |
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| San Francisco Web Pressmen & Prepass Union No. 4 |
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| SEIU No. Calif. Joint Council No. 2 |
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| SEIU Local 790 |
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| SEIU Local 1877 (Janitorial Union) |
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| Sheet Metal Workers, Local 104 |
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| Sign, Display & Allied Crafts Union, Local 510 |
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Social Services Union, SEIU Local 535
Unofficial Contra Costa Workers' Chapter site: http://ianarnold.freeyellow.com/chapter.html |
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| Sprinkler Fitters Local Union 483 |
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| Stationary Engineers, Local 39 |
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| Sugar Workers Union No.1 |
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| Teamsters' Join Council No. 7 |
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| Teamsters Union, Local 315 |
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| Teamsters Union, Local 856 |
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| United Food & Commercial Workers, Local 30-I |
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| United Food & Commercial Workers Union 428 |
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| United Food & Commercial Workers, Local 588 |
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| United Food & Commercial Workers Local 5 |
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| United Steelworkers, Local 5 |
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| United Steelworkers of America, Local 1440 |
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United Steelworkers of America, Local 2
United Steelworkers Local 2571
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