• Jaarlijkse reunie loopt uit op een gastro-enteritis explosie

      Carsauw HHC; Bosman A; Reintjes R; de Wit MAS; Conyn-van Spaendonck MAE; CIE; GGD Rotterdam e.o. (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 1997-04-30)
      An outbreak of acute gastroenteritis occurred among 200 participants at an annual reunion of an association of retired people. The event took place at a restaurant. To identify the cause of the illness and to determine whether foods were implicated a retrospective cohort study was undertaken. Participants and restaurant staff received a questionnaire inquiring about acute gastrointestinal symptoms and foods consumed at the reunion. The case definition was based on clinical symptoms, beginning within 4 days of attending the reunion. Attack rates for each meal and specific food-item were calculated. Leftover foods were collected at inspection of the restaurant. Participants and staff were asked to deliver a stool specimen if they had diarrhoea at the time of inquiry. Clinical presentation and epidemiological data suggest a viral gastroenteritis, possibly caused by small round structured virus (SRSV). No clear evidence for the vehicle of the infection was found. More than one food-item was probably implicated. Transmission of virus via the hands of the post-symptomatic head cook is a possible explanation for the contamination of foods. It was recommended that foodhandlers with acute gastroenteritis should remain off work or be transferred to other duties with less risk of transmission of infection until at least 48 hours after normalisation of stools. Additionally, there is need to continuously reinforce strict handhygiene practice.<br>
    • Jaaroverzicht Luchtkwaliteit 1998 en 1999

      Breugel P van; Buijsman E; Diederen H; Hammingh P; Kamst A; Noordijk H; Rentink L; Swaan P; Velders G; Velze K van; LLO (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2001-04-27)
      Op basis van metingen en modelberekeningen wordt een samenvattend beeld gegeven van de luchtkwaliteit en de belasting van bodem en oppervlaktewater door atmosferische depostie in Nederland in 1998 en 1999. Het speciale onderwerp in dit rapport is Achtergronden bij de luchtkwaliteitsmonitoring. Het rapport bestaat verder uit de hoofdstukken: mondiale-, fotochemische-, verzurende-, deeltjesvormige- en lokale luchtverontreiniging. In dit jaaroverzicht worden ook nieuwe normen geintroduceerd die voortvloeien uit Europese richtlijnen.
    • Jaaroverzicht luchtkwaliteit 2000

      Breugel P van; Diederen H; Hammingh P; Jimmink B; Kamst A; Noordijk H; Swaan P; Velders G; Velze K van; LLO (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2002-04-04)
      Op basis van metingen en modelberekeningen wordt een samenvattend beeld gegeven van de luchtkwaliteit en de belasting van bodem en oppervlaktewater door atmosferische depositie in Nederland in 2000. Het rapport bestaat uit een speciaal onderwerp, Smogregeling 2002, en uit de volgende hoofdstukken: mondiale-, fotochemische-, verzurende-, deeltjesvormige- en lokale luchtverontreiniging. In dit jaaroverzicht worden ook nieuwe normen ge6ntroduceerd die voortvloeien uit het nieuwe Besluit luchtkwaliteit en uit Europese (EU) richtlijnen.
    • Jaaroverzicht luchtkwaliteit 2001

      Beck J; Breugel P van; Buijsman E; Diederen H; Noordijk H; Ruiter J de; Tromp J; Velders G; Velze K van; Hammingh P; LLO (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2002-12-20)
      Als we de luchtkwaliteit over 2001 vergelijken met die van 2000 blijken deze in grote lijnen met elkaar overeen te komen. De trendmatige daling van concentraties heeft zich in grote lijnen doorgezet. 2001 was wat meteorologische invloed betreft een normaal jaar. Normoverschrijdingen op landelijke schaal hebben zich voorgedaan van ozon, zwevende deeltjes (PM10), depositie van potentieel zuur en stikstof. In de stedelijke omgeving is de jaargemiddelde norm NO2 overschreden langs een weglengte van circa 2000 km. Voor benzeen en benzo[a]pyreen geven berekeningen aan dat incidenteel overschrijdingen van grenswaarden kunnen zijn voorgekomen. In het jaaroverzicht luchtkwaliteit 2001 wordt op basis van metingen en modelberekeningen een samenvattend beeld gegeven van de luchtkwaliteit en de belasting van bodem en oppervlaktewater door atmosferische depositie in Nederland over 2001. Het rapport beschrijft de onderwerpen: mondiale, fotochemische, verzurende, deeltjesvormige en lokale luchtverontreiniging. Als extra onderwerp is een hoofdstuk opgenomen over de Nederlandse luchtkwaliteit in relatie tot de nieuwe Europese wetgeving voor luchtkwaliteit.
    • Jaaroverzicht Luchtkwaliteit 2002

      Buijsman E; LED (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2004-06-14)
      Op basis van metingen en modelberekeningen wordt een samenvattend beeld gegeven van de luchtkwaliteit en de belasting van bodem en oppervlaktewater door atmosferische depositie in Nederland in 2002. Het rapport bestaat uit hoofdstukken over mondiale, fotochemische, verzurende en vermestende, deeltjesvormige en lokale luchtverontreiniging.
    • Jaaroverzicht Luchtkwaliteit 2003-2006

      Beijk R; Mooibroek D; Hoogerbrugge R; LVM (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2007-11-06)
      Results from the Dutch National Air Quality Monitoring Network (LML) show that several European air quality limit values were exceeded in the Netherlands between 2003 and 2006. This applied mainly to nitrogen dioxide, particulate matter (PM10) and ozone. The number of exceedances was especially high in 2003, partly due to weather conditions such as enduring dry episodes. Ozone concentration levels above the alert threshold (smog alert) were measured in 2003 and 2006, with concentration levels above the alert threshold occurring mostly during heat episodes. Measurements for nitrogen dioxide showed a yearly average concentration at city street locations above the European limit value at approximately half the measuring sites between 2003 and 2006. Yearly average concentrations measured at regional locations have changed relatively little in the past four years, remaining below the limit value for this entire period. Particulate matter concentrations have been relatively constant in the past few three years, after peaking in 2003. There is an EU standard for particulate matter for short- and long-term exposure of the population, which is represented by year and day average concentrations, with a maximum number of exceedances per year allowed. The year averages for the 2003 to 2006 period are less than the standard for long-term exposure. The maximum number of days showing average concentrations above the limit value was violated at several locations in 2006. Both nitrogen dioxide and particulate matter are characterized by a clear downward trend when measured over a long period of time (15 and 14 years, respectively). However, it is not possible to determine from the past seven years whether this trend is still valid.
    • Jaaroverzicht Luchtkwaliteit 2007

      Beijk R; Mooibroek D; Hoogerbrugge R; LVM (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2009-03-03)
      Results from the Dutch National Air Quality Monitoring Network (LML) show that in 2007 some exceedances of a few European air quality limit values were measured in the Netherlands. However, both the number of exceedances and the level of the concentrations declined in 2007 compared to 2006, partly to more favourable weather conditions. One exception to this is 2007th New Year's Eve (2007/2008), when a very high level of PM10 occurred inside, and even outside, many urban areas due to a combination of fireworks, mist and low windspeeds. Ozone concentrations above the alert threshold (smog alert) were not observed in 2007. Exceedance of limit values for nitrogen dioxide occurred especially at traffic dominated monitoring sites. Nitrogen dioxide concentrations at rural background locations remained fairly stable during the last few years and are lower than the limit value. The maximum number of days with lM10-concentrations above the limit value is exceeded at a limited set of monitoring sites in 2007. Limit values for the year average concentration of PM10 are not exceeded at any of the monitoring sites in 2007
    • Jaaroverzicht Luchtkwaliteit 2008

      Beijk R; Mooibroek D; Hoogerbrugge R; LVM (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2009-08-20)
      Results from the Dutch National Air Quality Monitoring Network (LML) show that in 2008 some exceedances of a few European air quality limit values were measured in the Netherlands. However,similar to 2007, the exceedances were less high and frequent than some years before due to more favorable weather conditions. incidently, high concentrations did occur this year. Especially during both the 2007th and 2008th New Year's Eve, when a very high level of PM10 occurred inside, and even outside, many urban areas due to a combination of fireworks, mist and low windspeeds. Ozone concentrations above the alert threshold (smog alert) were not observed in 2008. Exceedance of limit values for nitrogen dioxide occured especially at traffic dominated monitoring sites. Nitrogen dioxide concentrations at rural backgroud locations remained fairly stable during the last few years and are lower than the limit value. The maximum number of days with PM10-concentrations above the limit value is not exceededed at any of the monitoring sites in 2008. On average, the 2008 year average concentrations PM10 declined with approximately 2 ug/m3 compared to 2007.
    • Jaaroverzicht Luchtkwaliteit 2009

      Mooibroek D; Beijk R; Hoogerbrugge R; CMM; mev (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2010-07-08)
      Measurements made by the Dutch National Air Quality Monitoring Network (LML) demonstrate that the concentrations of atmospheric pollutants measured in 2009 are not markedly different from those of preceding years. This lack of change can be partly explained by the weather conditions in recent years, which have not changed substantially. Sporadic high concentrations of pollutants did occur, as indicated by the measurement results for 2009 from the LML, which is managed by the RIVM. The last few years have seen a renewal of a substantial part of the LML, and collaboration with other monitoring networks has been intensified. The measurements of the LML and other monitoring networks are presented in the "Jaaroverzicht Luchtkwaliteit 2009", which provides an overview of measured and partially modeled air quality. The nitrogen oxide concentrations have remained stable during the last few years. Exceedance of the EU limit value for the annual average occurred in 2009 at the majority of traffic-dominated monitoring sites. Similar behavior was found in previous years. There was no exceedance of the limit values for particulate matter (PM10) at any of the monitoring sites in 2009. The concentrations of particulate matter in 2009 are comparable to those of previous years but show, over the longer term, a descending trend. Ozone levels above the EU alert threshold (smog alert) were not observed in 2009.
    • Jaaroverzicht Luchtkwaliteit 2010

      Mooibroek D; Berkhout JPJ; Hoogerbrugge R; CMM; mev (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2011-10-10)
      Air quality in the Netherlands in 2010. The concentrations of atmospheric pollutants measured by the Dutch National Air Quality Monitoring Network (NAQM) in 2010 are not markedly different from those of preceding years. This lack of change can be partly explained by the absence in recent years of any substantial variation in weather conditions, which affect air quality. Sporadic episodes of high concentrations of atmospheric pollutants were recorded in 2010, such as high concentrations of particulate matter due to a short-term dust event in the province of Drenthe. The 2010 eruption of the volcano Eyjafjallajökull in Iceland was also such an exceptional event, but measurements from the NAQM demonstrate that the eruption had only a limited effect on the deposition of sulphate and fluoride. Measurements 2010. There were no exceedances of the limit values for particulate matter (PM<10 µm) at any of the monitoring sites in 2010. Exceedance of the EU limit value for the annual average of nitrogen dioxide occurred at the majority of trafficdominated monitoring sites. Similar behavior was also found in previous years. Traffic-related air pollution contributes significantly to the nitrogen dioxide concentration. Model-based predictions led to forecasts of exceedance of the ozone threshold (ozone alert) being issued on several occasions in 2010. Those for whom such information is particularly relevant, such as professional sports(wo)men, the elderly, and individuals with chronic airway diseases, but also the general public, were therefore warned in advance. Ozone levels above the EU alert threshold (smog alert) were, however, not observed in 2010. Trend analysis up to 2015. Collaboration with both the GGD Amsterdam and DCMR Milieudienst Rijnmond has been intensified with the objective of improving the comparison of measurement results and enabling joint analysis of the data. A trend analysis of the combined data set of particulate matter and nitrogen dioxide demonstrated a decrease in both particulate matter concentrations and nitrogen dioxide concentrations over the long term. However, even if the decreasing trend in measured nitrogen dioxide concentrations continues, compliance with the limit value in 2015 at all monitoring sites is uncertain. A stronger reduction than thus far observed is needed to guarantee such compliance.
    • Jaaroverzicht Luchtkwaliteit 2011

      Mooibroek D; Berkhout JPJ; Hoogerbrugge R; CMM; mev (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2012-09-07)
      The concentrations of atmospheric pollutants measured by the Dutch National Air Quality Monitoring Network (NAQMN) in 2011 do not differ greatly from those of preceding years. This is partly due to the absence in recent years of any extreme weather conditions that can affect air quality. However, during the first few months of 2011, there was an increase in particulate matter concentrations, especially during dry spells in the spring of 2011. Measurements 2011 Up to June 11, 2011, the Netherlands had exemption from the European Union for complying with European particulate matter standards related to both the annual average concentration (40 micrograms per cubic meter) and the maximum number of days (35) with a maximum daily average of particulate matter concentration above 50 micrograms per cubic meter. During this period (early 2011) less stringent limit values were applicable. After this period the original limit values were reinstated. In this annual overview, in view of the long-term objectives, both the less stringent and the original European limit values were applied to the measured particulate matter concentrations. The annual average concentration of particulate matter meets both these standards. The European limit value for the maximum number of days exceeding the less stringent daily limit was not exceeded. However, when the original daily limit was applied several exceedances at the NAQMN locations were found, something that has not occurred since 2007. There is also a less stringent European limit value for nitrogen dioxide that is valid up to January 1, 2015. This level was not exceeded at any of the NAQMN locations. Similar to other years, exceedance of the EU standard for the annual average of nitrogen dioxide occurred at some traffic-related monitoring sites. Traffic contributes significantly to nitrogen dioxide concentrations. No exceedances were observed at rural and urban background stations. There is also a less stringent European limit value for nitrogen dioxide that is valid up to January 1, 2015. This level was not exceeded at any of the NAQMN locations. Similar to other years, exceedance of the EU standard for the annual average of nitrogen dioxide occurred at some traffic-related monitoring sites. Traffic contributes significantly to nitrogen dioxide concentrations. No exceedances were observed at rural and urban background stations. Trend analysis up to 2015 A trend analysis of the combined data set for particulate matter and nitrogen dioxide levels shows a decrease in concentrations over the long term, despite the slight increase in annual particulate matter levels for 2011. However, even if the decreasing trend in nitrogen dioxide concentrations continues at the same rate, compliance with the limit value at all monitoring sites by 2015 is uncertain. To guarantee such compliance requires a much stronger reduction than shown so far. Renewal During the past twenty years, the concentration levels of carbon monoxide and sulphur dioxide have decreased greatly. The monitoring obligations for these substances have subsequently been reduced and the NAQMN measurement strategy for these substances was adjusted in 2011. In addition, all ozone monitors were replaced in 2011. The old ozone monitors were found to underestimate ozone levels by about seven percent, therefore, a correction to the historical ozone data set was applied in 2011.
    • Jaaroverzicht luchtkwaliteit 2012

      Mooibroek D; Berkhout JPJ; Hoogerbrugge R; ILG; M&V (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2013-09-03)
      The measured annual average concentrations for most air pollutants, such as particulate matter and nitrogen dioxide, are exhibiting a steady long-term decline. Weather conditions being favourable for air quality, the results in 2012 were even lower than expected. However, if the long-term decline in nitrogen dioxide concentrations continues at the same rate, compliance with the limit values is not certain for all measurement locations in 2015. To guarantee such compliance, a stronger reduction than shown so far is required. Measurements 2012 Up to 1 January 2015, the Netherlands has been granted exemption by the European Union from complying with European nitrogen dioxide standards related to the annual average concentration (40 micrograms per cubic metre). During this period less stringent limit values are applicable. These limit values have not been exceeded at any measurement location in the Netherlands. However, the final limit value was exceeded at approximately half the traffic-related monitoring sites in 2012, particulary in Amsterdam and Rotterdam. Traffic contributes significantly to nitrogen dioxide concentrations. No exceedances were observed at rural or urban background stations. For particulate matter, the European standards were not exceeded at relevant locations in the Netherlands in 2012. On five days in 2012 moderate smog levels were observed (ozone concentration higher than 180 micrograms per cubic metre). There were no instances of severe smog levels (ozone concentration higher than 240 micrograms per cubic metre). Renewal In this yearly overview we have further integrated the results of our partner monitoring networks, as operated by the GGD Amsterdam and the DCMR. This integration is reflected in, among other things, the concentration development figures for particulate matter and nitrogen dioxide, which now incorporate data from these partner monitoring networks. Furthermore, in addition to the regular air quality measurements, this report contains the results of air quality measurements obtained by other methods. An example is the levels and trends of ammonia concentration from the Ammonia Monitoring Network in Nature (MAN). The concentration levels of benzene have decreased far below the European standard in recent years. This has led to a reduced European measurement requirement and an adjustment during 2012 of the measurement strategy for benzene in the Dutch National Air Quality Monitoring Network. Occasionally, temporary high concentrations of benzene are still observed at locations in and around large industrial areas.
    • Jaaroverzicht Luchtkwaliteit 2013

      Mooibroek D; Berkhout JPJ; Hoogerbrugge R; ILG; M&V (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2014-12-19)
      In the Netherlands, air pollutant concentrations are monitored at some 70 locations. The resulting data provide a detailed picture of air quality and the concentrations of the various pollutants at the monitoring stations. Nitrogen dioxide In 2013 the nitrogen dioxide concentrations at all measurement locations were in compliance with the higher limit value applicable at the time. A more stringent limit value for nitrogen dioxide will enter into effect in 2015. Nitrogen dioxide concentrations have been declining for years. However, the reduction at some monitoring stations near busy roads, for example in and around Amsterdam and Rotterdam, will not be sufficient to meet the 2015 limit value. This expectation is based on the long-term trend in measured nitrogen dioxide concentrations. Particulate matter Concentrations of particulate matter decreased further in 2013, and were in compliance with the European limit value. In 2015, particulate matter concentrations at the monitoring stations are expected to remain below this value. This expectation is based on the long-term trend in measured particulate matter concentrations. The monitoring data have been included in the section on air quality on the Environmental Data Compendium website (Compendium voor de Leefomgeving). This website also provides information about the health impact of nitrogen dioxide and particulate matter. The burden of disease due to air pollution is significant, even if concentrations comply with the European limit values. Substantial improvements in public health can be achieved with further reduction of concentrations below the limit values. Air quality in the Netherlands is monitored by the National Air Quality Monitoring Network, which is administered by the National Institute for Public Health and the Environment (RIVM) in collaboration with its regional partners. The air quality at locations other than monitoring stations is determined on the basis of a calculation model. RIVM reports these data separately in the annual report of the National Air Quality Cooperative Programme.
    • Jaarrapportage 2008 : Luchtmeetnet IBP Hilversum

      Stefess GC; CMM; mev (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2009-12-31)
    • Jaarrapportage 2009 : Luchtmeetnet IBP Hilversum

      Stefess GC; CMM; mev (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2010-09-28)
    • Jaarrapportage 2010 : Luchtmeetnet IBP Hilversum

      Stefess GC; CMM; mev (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2011-08-29)
      Het is zeer aannemelijk dat de concentraties fijnstof (PM10) en stikstofdioxide (NO2) in de omgeving van Hilversum in 2010 aan de normen voldoen. Dit blijkt uit de resultaten van luchtkwaliteitsmetingen van het RIVM in 2010 op drie permanente locaties in de gemeenten Hilversum, Bussum en Laren. Deze meetpunten zijn representatief voor de omgeving van Hilversum. Het onderzoek is uitgevoerd in opdracht van de gemeente Hilversum om gegevens te leveren over de luchtkwaliteit in de periode waarin het Integraal BereikbaarheidsPlan (IBP) Hilversum wordt uitgevoerd. De meetresultaten van 2010 komen overeen met die van 2009. Het Luchtmeetnet IBP Hilversum is in 2008 gestart met metingen van fijnstof. Voor stikstofoxiden zijn metingen begonnen vanaf voorjaar/zomer 2009. Afgesproken is dat het meetnet in ieder geval gedurende 10 jaar in Hilversum gaat meten, en vooralsnog gedurende 5 jaar in Bussum en Laren. Door de concentraties op verkeersbelaste locaties in Hilversum en Bussum te vergelijken met die van een locatie in Laren met weinig verkeer, wordt een indruk verkregen van de bijdrage van verkeer aan luchtverontreiniging tijdens het IBP Hilversum. In 2010 verschilden de daggemiddelde fijnstofconcentraties op de drie stations onderling niet betekenisvol. De concentratieniveaus zijn vergelijkbaar met die van andere stedelijke meetstations van het Landelijk Meetnet Luchtkwaliteit (LML). De concentratie aan stikstofoxiden varieerde over de dag; de hoogste waarden werden tijdens de ochtendspits gemeten. De jaargemiddelde stikstof(di)oxidegehaltes op de stations van het IBP Meetnet zijn iets lager dan die van gelijksoortige type stations van het Landelijk Meetnet Luchtkwaliteit.
    • Jaarrapportage 2011 : Luchtmeetnet IBP Hilversum

      Stefess GC; MLG; M&V (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2013-05-27)
      In 2011 the ambient air quality at 3 permanent sites in the urban area of Hilversum complied with the EU limit values for particulate matter (PM10) and nitrogen dioxide (NO2). This was shown by continuous measurements, performed by the National Institute for Public Health and the Environment, in the territory of Hilversum and the neighbouring cities of Bussum and Laren. The purpose of these measurement is to get information on air quality changes during the implementation of traffic circulation enhancements by the local authority. The monitoring results for the year 2011 are in agreement with similar observations in 2009 and 2010. The monitoring project has started with the measurement of particulate matter (PM10) in 2008, followed by nitrogen dioxide mid 2009. The monitoring effort aims to continue for 10 years at the site of Hilversum and presumably 5 years at Bussum and Laren. The relative contribution of traffic emissions to the air quality is assessed by comparison of concentration levels at traffic-oriented sites (Hilversum and Bussum) with those at a city background station (Laren). The 24-hour averages of PM10 showed some variation throughout the year and the differences between the three monitoring stations were not significant. The average levels were also comparable with those at other urban monitoring stations of the National Air Quality Monitoring Network in the Netherlands. Nitrogen dioxide levels showed more variation over the day with higher levels during morning rush hour. The yearly mean levels of nitrogen dioxide at the stations were somewhat lower than those of equally-typed stations in the National Air Quality Monitoring Network.
    • Jaarrapportage 2012 : Luchtmeetnet IBP Hilversum

      Stefess GC; MLG; M&V (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2013-12-16)
      In 2012 the ambient air quality at 3 permanent sites in the urban area of Hilversum complied with the EU limit values for particulate matter (PM10) and nitrogen dioxide (NO2). This was shown by continuous measurements, performed by the National Institute for Public Health and the Environment, in the territory of Hilversum and the neighboring cities of Bussum and Laren. The purpose of these measurements is to get information on air quality changes during the implementation of traffic circulation enhancements by the local authority. The monitoring results for the year 2012 are in agreement with similar observations in the preceding years 2009 - 2011. The monitoring project has started with the measurement of particulate matter (PM10) in 2008, followed by nitrogen dioxide mid 2009. The relative contribution of traffic emissions to the air quality is assessed by comparison of concentration levels at traffic-oriented sites (Hilversum and Bussum) with those at a city background station (Laren). The 24-hour averages of PM10 did not differ significantly between the three monitoring stations. The average levels were also comparable with those at other urban monitoring stations of the National Air Quality Monitoring Network in the Netherlands. Nitrogen dioxide levels showed some variation over the day with higher levels during morning rush hour, especially at the traffic stations. The yearly mean levels of nitrogen dioxide at all three stations were somewhat lower than those of equally typed stations in the National Air Quality Monitoring Network. The monitoring will be continued for another 5 years at the sites of Hilversum and Laren.
    • Jaarrapportage 2013 : Luchtmeetnet IBP Hilversum

      Stefess GC; MLG; M&V (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2015-10-10)
      Concentrations of particulate matter (PM10) and nitrogen dioxide (NO2) on the two permanent measurement locations in Hilversum and Laren are within legal limits, as in previous years. These measurement locations are representative for locations exposed to traffic and locations in the city background in the Hilversum region, respectively. In 2013, daily averaged concentrations of particulate matter on the two stations did not differ significantly. They were also comparable to those on other stations of the Dutch Air Quality Monitoring Network (LML) in a city environment. Concentrations of nitrogen oxides vary substantially during the day. The highest values were recorded during the morning rush hour on locations with heavy traffic. Annual averaged levels of nitrogen (di)oxides on the stations in Hilversum are a little lower than those at similar stations of LML elsewhere. For the years 2009-2013 the Hilversum stations show a downward trend in the concentration levels of PM10 and NO2. This trend follows the general trend in the Netherlands at similar LML stations. However, the annual averaged concentration levels in Hilversum are lower than the national average of similar type stations in the LML. The results above summarize the air quality measurements by RIVM. This research is performed under contract from the city of Hilversum, to provide air quality data for the Integral Accessibility Plan (IBP) for Hilversum. The IBP aims to improve traffic streams in and around Hilversum.
    • Jaarrapportage 2014 : Luchtmeetnet IBP Hilversum

      Stefess GC; MLG; M&V (Rijksinstituut voor Volksgezondheid en Milieu RIVM, 2015-11-04)
      Concentrations of particulate matter (PM10) and nitrogen dioxide (NO2) on the two permanent measurement locations in Hilversum and Laren are within legal limits, as in previous years. These measurement locations are representative for locations exposed to traffic and locations in the city background in the Hilversum region, respectively. In 2014, daily averaged concentrations of particulate matter on the two stations did not differ significantly. They were also comparable to those on other stations of the Dutch Air Quality Monitoring Network (LML) in a city environment. Concentrations of nitrogen oxides vary substantially during the day. The highest values were recorded during the morning rush hour on locations with heavy traffic. Annual averaged levels of nitrogen (di)oxides on the stations in Hilversum are a little lower than those at similar stations of LML elsewhere. For the years 2009-2014 the Hilversum stations show a downward trend in the concentration levels of PM10 and NO2. This trend follows the general trend in the Netherlands at similar LML stations. The annual averaged concentration levels of NO2 in Hilversum are lower than the national average of similar type stations in the LML. The results above summarize the air quality measurements by RIVM. This research is performed under contract from the city of Hilversum, to provide air quality data for the Integral Accessibility Plan (IBP) for Hilversum. The IBP aims to improve traffic streams in and around Hilversum.