Marston, Denham and Pitchcott Brook


These three brooks, all in Buckinghamshire, are not all classed as main river. The Fleet Marston Brook is the main brook which runs from above Waddesdon, past Fleet Marston Farm, along the railway line and meets the Thame below Aylesbury Parkway Station and below the confluence with Stoke Brook. The two smaller brooks (that are not officially classed as part of the main river system), rise in both Pitchcott and Denham, eventually joining together and meeting the main Brook at Fleet Marston Farm. Waddesdon Sewage Treatment Works discharges in to the top of Fleet Marston Brook. There is a significant amount of pasture and grassland surrounding these brooks, but we do not currently have enough information to understand the land-use fully.

In 2015, the Environment Agency classified these brooks collectively as “poor”, meeting their 2015 target. Unfortunately, there isn’t much biological data, but macrophytes have been surveyed and classed as “poor”. This is not surprising, as the physio-chemical surveys have put both phosphate and dissolved oxygen as “bad”, with ammonia as “moderate”. This means that water quality in this catchment is incredibly compromised at the survey site used by the Environment Agency. It is clear that more data is required before accurately assessing these brooks and reaching suitable targets.

You can find out more about the classification of rivers in our catchment by using the Environment Agency’s Catchment Data Explorer.


Small Waters

The river isn’t the only water that we are concerned with. There are multiple small waters including ponds, ditches and steams. All of which are highlighted on the map below.marston-denham-and-pitchcott-brooks-small-waters


We currently have no projects planned for this area, if you have any suggestions then we would love to hear from you.


We currently do not have any monitoring happening in this area, it would be great to extend our volunteer monitoring, particularly riverfly and water quality monitoring, to find out if there are some areas that should be celebrated or places that need improvement. You can find out more about our volunteer monitoring and how you could get involved in monitoring yourself here.

Other Groups

There are currently no groups that are working specifically on these Brooks. If you would like to get involved by starting a local group in your area, then please get in touch.