Dataset

Lea Guardians

Dataset by Thames21

Dataset summary

Observations

  • 27 February 2025

    Tottenham Cemetery by Caroline Jepson

    The ammonia levels were tested using both a low range Hanna checker and a high range Hanna checker recently given to us by Thames 21. The high range Hanna checker showed a reading of 0.43, so both had a very similar reading. This reading for ammonia was by far the lowest we have ever had and was considered Very Good on the instruction notes, which felt very special to us. We also tested the phosphates using both a low range and high range Hanna checker, also recently given to us by Thames 21. However we didn't get a reading from the high range Hanna checker but a 00 on the screen, so something had gone awry, and there wasn't time to do it again. Better luck next time.

  • 26 February 2025

    Downstream of Jack’s Lake by Eamonn Cannon

    Stream flowing strongly after previous day's rain

  • 24 February 2025

    Grovelands Park Lake Outfall by cafe and dam by Peter Leedham

  • 24 February 2025

    Rectory Farm by Susan Gillett

    Clarity greater than 210 Very cloudy. Lots of scum on surface

  • 21 February 2025

    Whitehall Outfalls by Janet Laban

    Direct sample from small outfall pipe - Ammonia >3.00 flashing Phosphate 1.48 Direct sample from large outfall pipe - Ammonia 1.89 Phosphate 2.32 Direct sample from central stream - Ammonia 0.25 Phosphate 0.18 Pollution from the outfall pipes is quickly diluted by cleaner water coming under the bridge from upstream of Whitehall Road