Observations
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11 August 2025
Outfall at RMI Site by Judith Howlett
Since last reported this outfall has been under TW 'SWOT' and work carried out on a problem in Holden Road. Results much improved especially Ammonia down from >9.99 to 0.42 ppm Phosphate down to 1.63. There has been a boom in the Brook to help with pollution, however since yesterday morning it has now been thrown into the Outfall along with a load of logs as photo depicts. TW informed
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11 August 2025
Folly pre confluence by Judith Howlett
Folly is barely flowing due to long period without rain and only a trickle running into the Dollis. Sample was from a pool of water, it seems likely looking at results misconnections in Southover or Chanctunbury. Phosphate > 2.50 flashing
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4 August 2025
Northwick park Brook(Wealdstone Brook?) by Angelique Soon
Phosphates were at a much lower level compared to the last test. There were concerns that the large Parkview housing development may have been polluting the brook. I wanted to take a sample further upstream of this to see how the samples compared but the river levels were unfortunately too low to take a sample. Vegetation debris is still being dumped next to the new Parkview housing bridge .I spoke to the Parkview gardener who happened to be conducting maintenance at this site and had thier van parked near this area about this issue. I think it probably unlikely that they are responsible for this debris. I observed that they had vegetation debris they had collected in large white bags in their van to be taken away for disposal.
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2 August 2025
Imperial Way Bridge - Lindsay Drive Roundabout by John Poole
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24 July 2025
Montrose Playing Fields Tramshed by Elliot Durrant
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23 July 2025
Darlands Lake (Downstream) by David Roth
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23 July 2025
Darlands Lake (Upstream) by David Roth
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21 July 2025
Imperial Way Bridge - Lindsay Drive Roundabout by John Poole
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19 July 2025
Watling Park - Abbots Rd Bridge (Upstream) by Kath Vos
Extremely fast flowing water due to very heavy rainfall.
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19 July 2025
Watling Park by Kath Vos
Water taken straight from the newly installed outfall with water coming from the new wetlands.
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19 July 2025
Watling Park - Pinecone/Middle Bridge (Downstream) by Kath Vos
Very fast flowing water, much higher then usual because of heavy rain during the night and well into the morning. Flood alerts in place.
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18 July 2025
Watling Park - Abbots Rd Bridge (Upstream) by Kath Vos
Slight smell of fish. Water fairly clear but brown sludge/algae on the bottom of the brook.
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18 July 2025
Watling Park - Pinecone/Middle Bridge (Downstream) by Kath Vos
water looks clear. No smell
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16 July 2025
Imperial Way Bridge - Lindsay Drive Roundabout by John Poole
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15 July 2025
Windsor Open Space - Village Road Outfall by Dianne Murphy
Sewage Fungus growing in pipe and down the wall below fish observed swimming in the brook around the outfall
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15 July 2025
Brent Cross by Dianne Murphy
Phosphate reading flashing 2.50 so exeeds the hanna checkers maximum
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15 July 2025
Outfall at RMI Site by Judith Howlett
Continuing to monitor this Outfall as at our RMI site and high Ammonia and Phosphate levels both flashing. Has previously been reported to TW and EA. The past week there has been a boom in place downstream of Outfall
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15 July 2025
Riverside Park (Upstream) by Judith Howlett
Long period low rainfall. Riverfly Monitoring site ARMI Score today 8 A lot of gammerus, small fish also observed. Outfall here has been reported to Thames Water and EA. Currently a boom in place. Thames Water today working on Holden Road (uphill from this location). Working on improvements
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15 July 2025
Folly pre confluence by Judith Howlett
Small water pool only, small fish fry surviving. Phosphate Hanna Checker (low range) was >2.5 (flashing)
