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

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Snare RapidsSince 1989, ENR has operated a Canadian Air and Precipitation Monitoring (CAPMoN)station at the Northwest Territories Power Corporation’s Snare Rapids hydro site. This site islocated 150 kilometres northwest of Yellowknife. Rain and snow samples are collected on adaily basis and sent to Environment Canada’s CAPMoN laboratory in Toronto for analysis ofprecipitation chemistry. Select results are presented below.Figure 24: Snare Rapids Acid Deposition (1993 - 2011)(kg/ha/year)1.61.41.210.80.60.40.2093 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11Sulphate Nitrate Calcium MagnesiumFigure 24 shows the deposition rates for sulphate, calcium, nitrate and magnesium from1993 to 2011.The geology of the NWT is mostly characterized by non-carbonate bedrock resistant toweathering and/or shallow, coarse-textured soils with low cation exchange capacity, lowsulphate adsorption capacity and low pH. The sulphate level of deposition that is consideredto be protective of sensitive ecosystems in the NWT is 7 kg/ha/yr. In areas of easternCanada where acid rain is a more serious environmental problem, sulphate deposition hasbeen measured by CAPMoN in excess of 20 kg/ha/yr. Nitrate deposition at Snare Rapids isalso low relative to eastern Canada.Sulphate and nitrate deposition rates measured at Snare Rapids remain below levels thatwould be expected to cause a significant environmental effect in sensitive ecosystems.30 NWT Air Quality Report 2011
Appendix A:Monitoring HISTORYHistory of Air Quality Monitoring in the Northwest Territories1974 • Government of the NWT starts monitoring air quality in Yellowknife with theinstallation of a high-volume air sampler at the Post Office site.1989 • Monitoring of acid precipitation at the Snare Rapids hydro-electric site begins.1992 • SO 2analyzer installed at the City Hall site.1997 • SO 2monitoring in N’dilo begins and continues until 2000.1998 • O 3analyzer added in Yellowknife to the City Hall site.2000 • A SO 2analyzer was installed in the ENR building in Fort Liard in March, followedby a H 2S analyzer in October.2002 • Daring Lake summer sampling of PM 10begins.• City Hall SO 2analyzer relocated to new air monitoring trailer located at Ècole SirJohn Franklin High School.2003 • Daring Lake summer sampling of PM 2.5begins (the same sampler is used forPM 10and PM 2.5monitoring).• Air monitoring trailers are installed in Inuvik, Norman Wells and Fort Liard.• CO and NO xanalyzers added to the Yellowknife station as well as a continuousfine particulate sampler (PM 2.5).• Norman Wells station monitors SO 2and H 2S.• Inuvik station monitors SO 2, H 2S, NO xand PM 2.5.• Fort Liard station monitors SO 2and H 2S. A PM 2.5sampler is installed late in theyear.• The O 3analyzer that was operating at the Yellowknife City Hall location isrelocated to the new Sir John Franklin station.• ENR initiates the upgrade of the Data Acquisition System moving to aspecialized air monitoring system, which will allow more efficient and qualitycontrolled data collection.• Continuous PM 2.5samplers are installed in Inuvik and Fort Liard.• A second high-volume sampler is installed at the Sir John Franklin station inYellowknife.2004 • PM 2.5sampler is installed in Norman Wells.• Data Acquisition System (DAS) is significantly upgraded. New components areinstalled inside the stations and a new data management, analysis and reportingsystem is brought on-line.NWT Air Quality Report 201131
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 30 and 31: Ground Level Ozone (O 3)The maximum
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

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