Pollution in Santa Clara County, California

Santa Clara County contains 367 EPA-regulated facilities, 23 of which are currently flagged for significant noncompliance. The county also hosts 21 Superfund sites and 53 TRI chemical reporters. EPA has assessed $26.1M in lifetime penalties and TRI reporters disclosed roughly 13.3k lb of on-site releases. That facility count is well above the California state average of 108 per county.

Superfund21NPL sites
TRI Facilities53reporters
EPA Facilities367regulated
Sig. Violators23current SNC

Superfund sites

SiteCityStatus
Advanced Micro Devices IncSunnyvaleConstruction complete
Applied MaterialsSanta ClaraReady for anticipated reuse
Westinghouse Electric Corp Sunnyvale PlantSunnyvaleReady for anticipated reuse
Monolithic MemoriesSunnyvaleReady for anticipated reuse
Trw Microwave Inc Building 825SunnyvaleConstruction complete
Lorentz Barrel Drum CoSan JoseReady for anticipated reuse
Intel Corp Mountain View PlantMountain ViewConstruction complete
Intel MagneticsSanta ClaraReady for anticipated reuse
Synertek Inc Building 1Santa ClaraConstruction complete
Spectra Physics IncMountain ViewReady for anticipated reuse
South Bay Asbestos AreaAlvisoReady for anticipated reuse
National Semiconductor CorpSanta ClaraConstruction complete
Hewlett Packard 620 640 Page Mill RoadPalo AltoReady for anticipated reuse
Intersil Inc Siemens ComponentsCupertinoConstruction complete
Fairchild Semiconductor Corp South San Jose PlantSan JoseReady for anticipated reuse
Teledyne SemiconductorMountain ViewReady for anticipated reuse
Raytheon CorpMountain ViewConstruction complete
Advanced Micro Devices Inc Building 915SunnyvaleReady for anticipated reuse
Moffett Field Naval Air StationMoffett FieldCleanup underway
Cts Printex IncMountain ViewReady for anticipated reuse
Fairchild Semiconductor Corp Mountain View PlantMountain ViewConstruction complete

Largest releasers

FacilityCityOn-site (lb)Status
Headway Technologies IncorporatedMilpitas4.5kCompliant
Agilent Technologies IncorporatedSanta Clara4.2kCompliant
Qualitek Inc Dba WestakSunnyvale1.2kCompliant
Infinera CorpSunnyvale1.2kPenalties
Northrop Grumman Marine SystemsSunnyvale1.0kSig. violation
Shell Oil Products San Jose TerminalSan Jose564Compliant
Streamline CircuitsSanta Clara510Compliant
Western Digital Technologies IncSan Jose45Sig. violation
Hill Brothers Chemical Co.San Jose14Compliant
Burke Industries IncSan Jose9Compliant
Ttm Technologies North America, LlcSan Jose7Compliant
CsbioMilpitas6Compliant
Csl Operating LlcSanta Clara5Compliant
Sierra Proto ExpressSunnyvale5Compliant
Granite RockSan Jose4Compliant
Intel Corp. Sc1/2Santa Clara1Compliant

Significant violators

FacilityCityPenaltiesLast Inspected
Lehigh Southwest Cement CompanyCupertino$501.8k2025-06-20
International Disposal Corporation OfSan Jose$181.0k2025-06-30
Kirby Canyon Recycling & DisposalMorgan Hill$149.0k2025-03-13
Kinder Morgan San Jose TerminalSan Jose$94.8k2023-07-20
Clean Harbors San JoseSan Jose$87.0k2026-02-05
Northrop Grumman Marine SystemsSunnyvale$44.0k2024-09-26
City Of Sunnyvale Wtr PollutionSunnyvale$30.0k2025-02-28
Guadalupe Disposal Site LandfillSan Jose$29.0k2025-05-02
City Of Sunnyvale/Public Works DeptSunnyvale$16.0k2025-04-08
San Jose/Santa Clara Water Pollution Control PlantSan Jose$6.0k2024-06-26
City Of Santa Clara, Silicon Valley PoweSanta Clara$1.5k2023-09-26
San Jose State University (Cogen Plant)San Jose$1.0k2024-11-25
Western Digital Technologies IncSan Jose$02026-02-18
Shoreline AmphitheatreMountain View$02023-11-02
Eagle Tech CircuitsSan Jose$02023-06-12
City Of Mountain View (Shoreline)Mountain View$02023-09-08
Owens CorningSanta Clara$02021-09-16
Lockheed Martin Space Systems CoSunnyvale$02025-07-17
Ogiso EnvironmentalSunnyvale$0
Cupertino QuarryCupertino$0
Coherent IncSunnyvale$02025-12-22
City Of Santa ClaraSanta Clara$02023-10-03
Cordova Printed CircuitsMilpitas$02024-11-19