Cupertino - Bay Area Air Quality Management District

The Cupertino air monitoring station was located at Monta Vista Park, about one mile east of the Lehigh Cement Plant. Pollutants continuously measured included ... Languages Languages Languages Languages Languages Advisory AirDistrictOperations TheAirDistrictcontinuestotakestepstoensureairqualityandpublichealthareprotectedwhiletheBayAreaadjuststothelatestphasesoftheCOVIDpandemic.Permitsforbusinessesadjustingoperationstoaidinthepublichealthresponsewillcontinuetobeexpedited.Readmore...|enEspañol Advisory AirDistrictOperations TheAirDistrictcontinuestotakestepstoensureairqualityandpublichealthareprotectedwhiletheBayAreaadjuststothelatestphasesoftheCOVIDpandemic.Permitsforbusinessesadjustingoperationstoaidinthepublichealthresponsewillcontinuetobeexpedited.Readmore...|enEspañol AirDistrict AboutAirQuality SpecialAirMonitoringProjects Cupertino AboutAirQuality AirQualitySummaries CurrentAirQuality AirMonitoringData AirMonitoringDataGuide AirQualityMeasurement AmbientAirMonitoringNetwork GreenhouseGasMeasurementProgram GreenhouseGasData GHGEmissionsInventory InteractiveDataMaps Research&Data AirQualityStandards&AttainmentStatus EmissionsInventories CriteriaAirPollutants Production-BasedGHGEmissionsInventory Consumption-BasedGHGEmissionsInventory ToxicAirContaminants LocalStudies MapsDataandDocuments Research&Modeling ModelingAdvisoryCommittee ReportsMapsandDocuments Forecasting&DataAnalysis RefineryFlareMonitoring FlareCausalReports CommunityAirRiskEvaluation(CARE)Program OpenBurnStatus AirQualityForecast IncidentsandAdvisories ChevronRefineryFire SpareTheAir SparetheAirTextAlerts AlertUnsubscribeInstructions WhatYouCanDo Glossary Abbreviations GlossaryofTerms WildfireAirQualityResponseProgram CleanAirFiltrationProgram HomeAirFiltrationProgramandProjects WildfireSafety WoodSmoke Lab&SourceTest SpecialAirMonitoringProjects Cupertino ForestKnolls SpecialReports Carbon-14Analysis UltrafineParticulateMatter VolatileOrganicCompounds ExpertMonitoringPanel Cupertino AboutAirQuality AirQualitySummaries CurrentAirQuality AirMonitoringData AirMonitoringDataGuide AirQualityMeasurement AmbientAirMonitoringNetwork GreenhouseGasMeasurementProgram GreenhouseGasData GHGEmissionsInventory InteractiveDataMaps Research&Data AirQualityStandards&AttainmentStatus EmissionsInventories CriteriaAirPollutants Production-BasedGHGEmissionsInventory Consumption-BasedGHGEmissionsInventory ToxicAirContaminants LocalStudies MapsDataandDocuments Research&Modeling ModelingAdvisoryCommittee ReportsMapsandDocuments Forecasting&DataAnalysis RefineryFlareMonitoring FlareCausalReports CommunityAirRiskEvaluation(CARE)Program OpenBurnStatus AirQualityForecast IncidentsandAdvisories ChevronRefineryFire SpareTheAir SparetheAirTextAlerts AlertUnsubscribeInstructions WhatYouCanDo Glossary Abbreviations GlossaryofTerms WildfireAirQualityResponseProgram CleanAirFiltrationProgram HomeAirFiltrationProgramandProjects WildfireSafety WoodSmoke Lab&SourceTest SpecialAirMonitoringProjects Cupertino ForestKnolls SpecialReports Carbon-14Analysis UltrafineParticulateMatter VolatileOrganicCompounds ExpertMonitoringPanel AirDistrict AboutAirQuality SpecialAirMonitoringProjects Cupertino LearnabouttheAirDistrict’sspecialpurposeairqualitymonitoringprojectinCupertino,California. CupertinoresidentswereconcernedthattheLehighCementPlantanditsdieseltrucktrafficcouldbeaffectingtheairqualityinnearbyneighborhoods.TheAirDistrictmonitoredairqualityinCupertinofromSeptember2010toDecember2013todeterminewhetherresidentswereexposedtohighpollutionlevelsthatmaynotreachotherBayAreamonitoringstations. TheCupertinoairmonitoringstationwaslocatedatMontaVistaPark,aboutonemileeastoftheLehighCementPlant.Pollutantscontinuouslymeasuredincludedozone,sulfurdioxide,particulatematter,nitrogenoxides,nitrogendioxide,hydrocarbons,andcarbonmonoxide.Everysixthday,24-hrsamplesofambientairwerecollectedandanalyzedfortoxicgasesandmetals. AftercollectingthreeyearsofairqualitydataattheCupertinosite,theAirDistrictreviewedthedataanddevelopedaSummaryandAnalysisofCupertinoAirMonitoringResults(PDF). SpecialPurposeMonitoringinCupertino CupertinoresidentshadbeenconcernedthattheLehighCementPlantanditsassociateddieseltrucktrafficcouldhavesignificantairqualityimpactsonnearbyneighborhoods.Consequently,thestudy measurespollutantsinambientairspecifictothoseemissionsfromLehighanditsassociatedtrucktraffic. AftercollectinganentireyearofdatafromSeptember2010throughAugustof2011,AirDistrictstaffreviewedthedataanddeveloped aSummaryandAnalysisofCupertinoMonitoringResults–RevisedIncluding2012Data(835KbPDF,11pgs,revised11/20/14).  TheAirDistrict’sCupertinoairmonitoringequipmentishousedinatraileratMonteVistaPark,inaresidentialareaaboutonemileeastoftheLehighCementPlantandtwoblockssouthofStevensCreekBlvd.Pollutants continuously measuredincludeozone,sulfurdioxide,particulatematter,nitrogenoxide,nitrogendioxide,hydrocarbons,andcarbonmonoxide. HourlyaveragesforthesepollutantscanbeviewedandcomparedwithotherlocationsontheAirDistrict’sRealTimeAirQualityDatawebpage. Hourlywindsandtemperaturearealsomeasuredinthepark. Inaddition,24-hoursamplesofambientairarecollectedeverysixthdayandanalyzedfortoxicgasesandmetals. Thesamplesarecollectedincanistersandonfilters forlateranalysisattheAirDistrictandcontractlaboratories. Toxicsandmetalsdata(599KbPDF,9pgs,revised02/23/12)areavailableforviewing. FurtherinformationaboutairtoxicscanbefoundattheCaliforniaOfficeofEnvironmentalHealthHazardAssessment(OEHHA)website. Forcomparison,toxicsdatasummariesforothermonitoringsitesthroughoutCalifornia canbefoundattheCaliforniaAirResourcesBoard(CARB)website.Itisimportanttonotethe averagingandreportingtimeframes onthesewebsitestoensurethatthedataarecomparable. InadditiontothespecialCupertinomonitoringsite,theAirDistrictoperates24permanentairmonitoringstationswithintheBayArea.TheclosestpermanentmonitoringstationtoCupertinois9.8mileseastindowntownSanJose.AirqualitymeasurementsattheSanJosestationarecomparabletomeasurementstakenatotherstationsaroundtheBayArea:mostpollutantsarewellbelowstateorfederalambientairqualitystandards,withthe exception ofozoneandfineparticulates.AirqualitymeasurementsattheCupertinostationhavealsobeenwellbelowstateorfederalambientairqualitystandards,includingmeasurementsofozoneandfineparticulates. Table1belowliststhepollutantsmeasuredatCupertinoandthesamplingfrequencies. Table1.PollutantsmeasuredatCupertino PollutantMeasuredSamplingFrequencytable-mobile-only-column CarbonMonoxide(CO)Continuously CarbonMonoxide(CO) SamplingFrequency: Continuously NitrogenOxides(NOx)Continuously NitrogenOxides(NOx) SamplingFrequency: Continuously Ozone(O3)Continuously Ozone(O3) SamplingFrequency: Continuously SulfurDioxide(SO2)Continuously SulfurDioxide(SO2) SamplingFrequency: Continuously FineParticulates(PM2.5)Continuously FineParticulates(PM2.5) SamplingFrequency: Continuously ToxicGassesandMetalsEvery6days ToxicGassesandMetals SamplingFrequency: Every6days ContactUs Meteorology&Measurements AirMonitoring 415.749.4985 ContactUs SparetheAirStatus Sunday 12/19 NoAlert Learnmore... AirQualityWidgets Return LastUpdated:5/24/2015