Stonton Brook Macroinvertebrate Survey 2016/17

Over the last two years, the Environment Agency’s Ecology Team have be surveying and analysing the macroinvertebrate communities across the Stonton Brook catchment within the wider Welland catchment.

The Stonton Brook catchment was surveyed at eight sites in order to assess the current condition of the system. The survey consisted of the collection and analysis of macroinvertebrate community samples. Macroinvertebrates are widely used as indicators of the condition of the aquatic environment and a considerable number of tools have been developed to enable the use of macroinvertebrate community data in the assessment of many features of aquatic habitats.


  • In comparison to the spring 2016 data, the most recent data indicates that water quality, flow condition and fine sediment in the lower reaches of Stonton Brook (e.g. U/S Thorpe Langton STW and Thorpe Langton sites) are all starting to improve.
  • Fine sediment pressure also seems to be easing on the Tugby trib. of Stonton Brook, and this appears to be helping the situation at Goadby, but there is still lots of room to improve.
  • Skeffington STW and Tugby STW appear to still be greatly affecting water quality in terms of organic enrichment, Tugby STW getting slightly better but Skeffington STW showing no particular improvement.
  • D/S Skeffington STW has started to indicate a slight flow pressure, though is more likely a result of the water quality issue.
  • The Glooston Arm at Stonton Wyville remains a particular concern for both fine sediment (0.00 for PSI is, unfortunately, correct) and flow conditions
  • Flow conditions remain broadly similar in 2017 to those in 2016 with an improvement in flow conditions at the Goadby site, which indicated a low flow pressure in 2016.

You can read the reports produced by the survey by clinking the links below:

Stonton Brook Spring 2016

Stonton Brook Spring 2017a

LIFE Spring 2017

PSI Spring 2017

WHPT Spring 2017