Union Sanitary District

228 public works projects registered with the California Department of Industrial Relations, 2014–2026 · Union City, Alameda County. Reported contract value: $365,258,024.

Projects by year

YearProjectsReported contract value
202616$18,989,022
202512$338,726,631
202411$4,740,085
202311$213,745
202218—
202110$23,954
202013—
201911—
20185—
201736—
201657—
201523—
20141—

DIR has published contract amounts since July 2024; earlier years count projects only.

Types of work

  • Other · 77
  • Sewer & wastewater · 35
  • Buildings & facilities · 32
  • HVAC & mechanical · 20
  • Electrical, low voltage & AV · 15
  • Water · 15
  • Paving & streets · 6
  • Demolition & site work · 5
  • Solar, EV & energy · 4
  • Bridges & structures · 3
  • Design, inspection & consulting · 3
  • Parks, landscape & fields · 3

Inferred by Atriam from each project's name and description, not reported by the agency.

Contractors it awards most

Prime contractorProjectsReported contract value
PRIME MECHANICAL SERVICE INC5$164,607
BRIGHTVIEW LANDSCAPE SERVICES, INC.2$204,064
CONVERGINT TECHNOLOGIES LLC2$161,370
MOUNTAIN CASCADE INC1$11,257,664
AZUL WORKS INC1$5,315,000
AES INDUSTRIAL INC1$1,688,418
BESS TESTLAB, INC1$633,994
WESTROCK ENGINEERING1$396,953
AECOM TECHNICAL SERVICES INC1$213,745
VISTAM INC1$103,240
3RS Holdings, LLC1$36,736
NEW IMAGE LANDSCAPE COMPANY1$32,851
ATI RESTORATION, LLC1$20,000
GROUND LEVEL CONSTRUCTION INC1$17,435
TRI-SIGNAL INTEGRATION, INC1$5,800

Latest projects

DateProjectPrime contractorContract amount
Sep 21, 2026RTU Replacement in GymPaving & streetsGROUND LEVEL CONSTRUCTION INC$17,435
Jul 1, 2026As-Needed Emergency Restoration ServicesSewer & wastewaterATI RESTORATION, LLC$20,000
Jul 1, 2026HVAC MaintenanceHVAC & mechanicalPRIME MECHANICAL SERVICE INC$45,369
Jun 1, 2026As-Needed Emergency Restoration ServicesSewer & wastewaterDRY KINGS RESTORATION LLC$20,000
May 12, 2026ETSU Campus Solar Facilities ProjectDesign, inspection & consultingAZUL WORKS INC$5,315,000
May 6, 2026Access Control to CS Bldg & WarehouseElectrical, low voltage & AVCONVERGINT TECHNOLOGIES LLC$76,125
Apr 28, 2026Primary Digester No. 6 RehabilitationDemolition & site workMOUNTAIN CASCADE INC$11,257,664
Apr 20, 2026ETSU - Phase 2 Fleet EV Charging ProjectSolar, EV & energyInCharge Energy, Inc.$313,020
Apr 7, 2026LCP Upgrade Plus VFD (AM-2026-5997)HVAC & mechanicalAPGN, INC.$90,091
Apr 3, 2026Landscape Maintenance ServiceParks, landscape & fieldsBRIGHTVIEW LANDSCAPE SERVICES, INC.$153,014
Mar 11, 2026Compactor MaintenanceOtherCOMPACTOR MANAGEMENT COMPANY LLC$9,897
Feb 9, 2026Fire alarm testing and monitoringFire & life safetyPYRO - COMM SYSTEMS INC$13,394
Feb 9, 2026Switchboard No. 3 & MCC No. 25 Rplc.Sewer & wastewaterBLOCKA CONSTRUCTION INC$1,248,010
Feb 2, 2026Odor Scrubber Replacements (East PCs)OtherNATIONAL AIR BALANCE COMPANY INC$7,250
Jan 26, 2026ETSU Campus - Fire alarm Program & TestFire & life safetyTRI-SIGNAL INTEGRATION, INC$5,800
Jan 12, 2026Thickeners No. 3 & 4 Overflow Line Repl.OtherWESTROCK ENGINEERING$396,953
Oct 30, 2025ETSU Phase 1A - Radio SystemOther3RS Holdings, LLC$36,736
Sep 29, 2025PO # 1015945Paving & streets——
Sep 22, 2025Phase 2 EV Project TransformerSolar, EV & energy—$71,450
Sep 4, 2025ETSU 1B - Secondary & Effluent Fac. UpgrSewer & wastewater—$324,530,134
Jul 7, 2025CS HVACHVAC & mechanicalPRIME MECHANICAL SERVICE INC$24,665
Jul 1, 2025HVAC FMCHVAC & mechanicalPRIME MECHANICAL SERVICE INC$40,444
Jun 9, 2025Pump Stations Odor Control ImprovementsWater—$8,337,293
May 27, 2025As-Needed Emergency Spill ResponseOtherENVIRONMENTAL LOGISTICS INC$1
May 12, 2025Primary Scum Pipeline ReplacementBuildings & facilitiesAES INDUSTRIAL INC$1,688,418

Source: California Department of Industrial Relations public works project registrations (PWC-100), updated daily by Atriam.