Query by Location - Results

Data Update 17/05/2022: The pollution concentration and deposition data in the Site Relevant Critical Load Tool has been updated to use the 3-year mean for the years 2018-20.

Habitat: Montane Habitats

Grid Reference: NX543787

Grid Easting: 254500 to the 1km mid point (metres)

Grid Northing: 578500 to the 1km mid point (metres)

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Pollutant: Ammonia

Critical Level: 1.0 - 3 µg m-3

Concentration: 0.95 µg m-3

Data Year: 2018 - 2020

Exceedance: [-0.05] to [-2.05] µg m-3

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Pollutant: N Deposition

Critical Load Range:
Arctic, alpine and subalpine scrub habitats: 5 - 15 Kg N/ha/year
Moss and lichen dominated mountain summits: 5 - 10 Kg N/ha/year

For applying the best indicative critical load values for use in impact assessments please visit the following page.

Deposition: 21 Kg N/ha/year

Data Year: 2018 - 2020

Exceedance Ranges:
Arctic, alpine and subalpine scrub habitats [16] to [6] Kg N/ha/year
Moss and lichen dominated mountain summits [16] to [11] Kg N/ha/year

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Pollutant: Nitrogen Oxides

Critical Level: 30 µg NOx (as NO2) m-3

Concentration: 3.01 µg NOx (as NO2) m-3

Data Year: 2018 - 2020

Exceedance: -26.99 µg NOx (as NO2) m-3

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Pollutant: Ozone

Critical Level: 5000 ppb hours (based on(Semi-)natural vegetation communities dominated by perennials, 6 month growing season mid April- mid October)

Exposure: 668.67 ppb hours

Data Year: 2007 - 2012

Exceedance: -4331.33 ppb hours

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Pollutant: Sulphur Dioxide

Critical Level: 20 µg m-3

Concentration: 0.27 µg m-3

Data Year: 2018 - 2020

Exceedance: -19.73 µg m-3

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Pollutant: Acid Deposition

Critical Load Class & Values:
Class: Montane
CLmaxS: 0.57 CLminN: 0.321 CLmaxN: 0.891 (keq/ha/yr)

Deposition: 1.61 (N: 1.5 | S: 0.21) (keq/ha/yr)

Data Year: 2018 - 2020

Exceedance: