Dataset

Lea Guardians

Dataset by Thames21

Dataset summary

Observations

14 February 2026

Footbridge near Rangers Road

13 parameters tested

algae, ammonia, clarity, colour, current weather, current weather description, odour, water surface, phosphate, weather in the past 24hrs, weather in the past 24hrs description, water flow, water level

14 February 2026

Downstream of Connaught Water

13 parameters tested

algae, ammonia, clarity, colour, current weather, current weather description, odour, water surface, phosphate, weather in the past 24hrs, weather in the past 24hrs description, water flow, water level

14 February 2026

Folly Lane EA monitoring point

14 parameters tested

algae, ammonia, clarity, colour, conductivity, current weather, odour, water surface, phosphate, pollution sources, weather in the past 24hrs, water flow, water level, water temperature

13 February 2026

Maidens Bridge

7 parameters tested

ammonia, conductivity, flow, total dissolved solids (tds), turbidity, water depth, water temperature

13 February 2026

Cuffley Brook upstream

7 parameters tested

ammonia, conductivity, flow, total dissolved solids (tds), turbidity, water depth, water temperature

13 February 2026

Rose and Crown pub

7 parameters tested

ammonia, conductivity, flow, total dissolved solids (tds), turbidity, water depth, water temperature

13 February 2026

The Charter Road (Gordon Avenue)

16 parameters tested

algae, ammonia, clarity, colour, conductivity, current weather, current weather description, odour, water surface, phosphate, pollution sources, weather in the past 24hrs, weather in the past 24hrs description, water flow, water level, water temperature

13 February 2026

Rectory Farm Footbridge

6 parameters tested

ammonia, conductivity, total dissolved solids (tds), turbidity, water depth, water temperature

13 February 2026

Highams Park Lake

16 parameters tested

algae, ammonia, clarity, colour, conductivity, current weather, current weather description, odour, water surface, phosphate, pollution sources, weather in the past 24hrs, weather in the past 24hrs description, water flow, water level, water temperature

13 February 2026

Hollyhill brook

7 parameters tested

ammonia, conductivity, flow, total dissolved solids (tds), turbidity, water depth, water temperature

13 February 2026

Cattlegate Road

7 parameters tested

ammonia, conductivity, flow, total dissolved solids (tds), turbidity, water depth, water temperature

11 February 2026

Jolly Farmers Bridge

7 parameters tested

ammonia, conductivity, flow, phosphate, total dissolved solids (tds), turbidity, water temperature

11 February 2026

Botany Bay Bridge

8 parameters tested

ammonia, conductivity, flow, phosphate, total dissolved solids (tds), turbidity, water depth, water temperature

11 February 2026

Hadley Road Bridge

8 parameters tested

ammonia, conductivity, flow, phosphate, total dissolved solids (tds), turbidity, water depth, water temperature

11 February 2026

Plumridge Farm 1

7 parameters tested

ammonia, conductivity, flow, total dissolved solids (tds), turbidity, water depth, water temperature

11 February 2026

Plumridge Farm 2

8 parameters tested

ammonia, conductivity, flow, phosphate, total dissolved solids (tds), turbidity, water depth, water temperature

11 February 2026

Hatch Roundabout - Downstream

12 parameters tested

algae, ammonia, clarity, colour, current weather, current weather description, odour, phosphate, weather in the past 24hrs, weather in the past 24hrs description, water flow, water level

11 February 2026

Hatch Roundabout - Upstream

13 parameters tested

algae, ammonia, clarity, colour, current weather, current weather description, odour, phosphate, pollution sources, weather in the past 24hrs, weather in the past 24hrs description, water flow, water level

11 February 2026

Plumridge Farm 2

8 parameters tested

ammonia, conductivity, flow, phosphate, total dissolved solids (tds), turbidity, water depth, water temperature

11 February 2026

Slopers Farm 1

8 parameters tested

ammonia, conductivity, flow, phosphate, total dissolved solids (tds), turbidity, water depth, water temperature