NWT Air Quality Report (2011) - Environment and Natural ...

More documents

Recommendations

Info

Ground Level Ozone (O 3)The maximum 1-hour average was 110µg/m 3 , while the maximum 8-hour average was106µg/m 3 , both occurring in May. Neither the 1-hour national maximum acceptable level(160µg/m 3 ) nor the 8-hour NWT standard (130µg/m 3 ) for ground level ozone was exceededin 2011. The annual average was 46µg/m 3 , which is within the range of what is consideredbackground levels. The typical elevated readings in the spring-time were observed, which isconsistent with historical data.Figure 22: 2011 Norman Wells Ozone(μg/m 3 )120100Concentration806040200J F M A M J J A S O N DMonthly Average 1-hour Maximum Maximum 8-hour AverageFigure 22 shows the maximum hourly and maximum 8-hour average per month as well asthe monthly averages for ground level ozone recorded in Norman Wells in 2011.28 NWT Air Quality Report 2011
Nitrogen Dioxide (NO 2)The 2011 NO 2results for Norman Wells show that the maximum 1-hour average was42μg/m 3 , the maximum 24-hour average was 13μg/m 3 and the overall annual average was2μg/m 3 , which were within the NWT standards (400, 200, 60 μg/m 3 , respectively).Figure 23: 2011 Norman Wells Nitrogen DioxideConcentration(μg/m 3 )454035302520151050J F M A M J J A S O N DMonthly Average 1-hour Maximum 24-hour MaximumFigure 23 shows the 2011 monthly averages, maximum 24-hour averages and maximum1-hour concentrations of NO 2in Norman Wells. As with previous years, NO 2levels wereobserved to increase in the winter months as a function of idling and other combustionsources during inversions (stagnant air masses).Hydrogen Sulphide (H 2S)The maximum hourly H 2S concentration in 2011 was 2μg/m 3 and the vast majority ofreadings were less than 1μg/m 3 , essentially within the detection limits or ‘noise’ range of theanalyzer. The maximum 24-hour average was 2μg/m 3 . H 2S in Norman Wells was within thelimits of the adopted Alberta guidelines (1-hour average of 14μg/m 3 and a 24-hour averageof 4μg/m 3 ). The 2011 results are consistent with previous years.NWT Air Quality Report 201129
Page 6: OPERATIONS (NETWORK)The NWT Air Qua
Page 10 and 11: Developmentsin 2011Many upgrades we
Page 12: NWT AirQuality StandardsThe Governm
Page 16: The graph in Figure 5 presents the
Page 20 and 21: on winter-time air quality can be i
Page 22: Coarse Particulate (PM 10)The maxim
Page 25 and 26: fort liardAIR QUALITYThe focus of t
Page 28 and 29: Norman WellsAir QualityThe focus of
Page 32 and 33: Snare RapidsSince 1989, ENR has ope
Page 34 and 35: History of Air Quality Monitoring i
Page 36 and 37: The national Canada-wide Standards
Page 38 and 39: CO affects humans and animals by in

NWT Air Quality Report (2011) - Environment and Natural ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?