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Mountsorrel quarry

Our PM10 monitor went 'live' on 26th October 2011. As there is a delay for the samples to be exposed, collected and analysed; results are retrospectively published for the previous 3 month sampling period in a single update.

Several instances of raised PM10 levels have observed by the Automatic Urban and Rural Network (AURN) sampler in Nottingham. This is an indicator that some elevated results might be 'transboundary' and not likely to be associated with Mountsorrel Quarry. 

This is thought to be associated with Saharan dust brought to the UK by climatic conditions at the time. The next result update will be during August 2018.

2018 Year to Date  
No. of exceedences (01/01/18 to 01/04/18) 0
No. of valid samples 59
Data capture rate (%) 65%
(Predicted) Equivalent exceedences for full year 0
Average concentration (µg/m-3) 24.00

For the 365 days previous to 1st April 2018 (inclusive) our recorded results indicate 12 exceedences of the 24-hr mean National Air Quality Objective from 249 valid sampling days (a data capture rate of 68% for this period). 

This would be the equivalent to 18 exceedences per annum assuming a 100% data capture rate, compared to the permitted maximum of 35. The annual average concentration for this period is 23.18 µg/m-3.

Exceedences in previous years

  • 2017: 15 from 238 valid samples = equivalent of 23 for full year  (avg. conc. = 24.84 µg/m-3)
  • 2016: 21 from 268 valid samples = equivalent of 29 for full year  (avg. conc. = 24.65 µg/m-3)
  • 2015: 26 from 279 valid samples = equivalent of 34 for full year  (avg. conc. = 27.09 µg/m-3)
  • 2014: 26 from 296 valid samples = equivalent of 33 for full year  (avg. conc. = 25.50 µg/m-3)
  • 2013: 18 from 299 valid samples = equivalent of 22 for full year  (avg. conc. = 24.10 µg/m-3)
  • 2012: 16 from 339 valid samples = equivalent of 18 for full year  (avg. conc. = 22.96 µg/m-3)

Results obtained during our study in 2009/10 (against which results the Air Quality Management Area was declared) showed 60 exceedences in a corresponding period of time from 313 valid sampling days, the equivalent to 70 exceedences per annum.  The annual average concentration for this period was 33.18 µg/m-3.

Results to date would suggest that there has been a significant reduction (averaging ~25%) in the average concentration of PM10 at the sampling site (which is considered to be a worse case position) when compared to results prior to the declaration of the Air Quality Management Area (AQMA).

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