Marsh Dykes & Thamesmead Water Quality Group

Observations

• 17 December 2025

  Gallions Lake Wetland Outlet by Cristian Popescu

• 17 December 2025

  Gallions Lake by Cristian Popescu

• 17 December 2025

  Longmarsh Lane by Cristian Popescu

• 14 December 2025

  Slade Pond Inlet by Jane Platt

  Sulphurous smell. Cleanest water we've seen so far, but there are strange grey-looking sediments at the bottom of the pond. flashing 2.5 phosphate. https://photos.app.goo.gl/uUiYDo3Zw1Adq3sF7

• 14 December 2025

  Oxleas wood, large pond by Katie Smith

• 14 December 2025

  Oxleas wood, site 3 by Katie Smith

  No water present

• 14 December 2025

  Oxleas Meadow by Katie Smith

  No water present

• 14 December 2025

  Slade Pond Outfall by Jane Platt

  Sulphurous smell. One of the highest water level in a long time. We cleared duckweed and old leaves.

• 13 December 2025

  Maryon Wilson Park by Jane Platt

• 26 November 2025

  Gallions Lake Wetland Outlet by Cristian Popescu

• 26 November 2025

  Gallions Lake by Cristian Popescu

• 26 November 2025

  Longmarsh Lane by Cristian Popescu

• 9 November 2025

  Maryon Wilson Park by Jane Platt

• 9 November 2025

  Slade Pond Outfall by Jane Platt

  Sulphurous smell Phosphates 2.5 flashing, so off the scale

• 9 November 2025

  Slade Pond Inlet by Jane Platt

  sulphurous smell flashing 2.5 ammonia, so over 2.5 Ammonia 6.35

• 8 November 2025

  Erith Marshes outflow to Thames by Paul Brewster

  Elevated Amonnia levels

• 30 October 2025

  Gallions Lake Wetland Outlet by Cristian Popescu

• 30 October 2025

  Gallions Lake by Cristian Popescu

• 30 October 2025

  Longmarsh Lane by Cristian Popescu

• 19 October 2025

  Burnett Road, Erith by Paul Brewster