Dataset

Lea Guardians

Dataset by Thames21

Dataset summary

Observations

1 February 2026

Markfield Park (Stonebridge Brook) CSO

13 parameters tested

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, water use

1 February 2026

Whitehall Plain

12 parameters tested

algae, ammonia, 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

1 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

1 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

31 January 2026

East Finchley Allotments - East Stream

18 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, turbidity, water flow, water level, water temperature, water use

31 January 2026

Friends Bridge

14 parameters tested

algae, ammonia, clarity, colour, conductivity, current weather, current weather description, odour, water surface, phosphate, turbidity, water flow, water level, water temperature

31 January 2026

Flood Relief Channel outflow

14 parameters tested

algae, ammonia, clarity, colour, conductivity, current weather, current weather description, odour, water surface, phosphate, turbidity, water flow, water level, water temperature

31 January 2026

Whitehall Outfall 5b

15 parameters tested

algae, ammonia, clarity, colour, 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

31 January 2026

Whitehall Outfall 5a

14 parameters tested

algae, ammonia, clarity, colour, 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 temperature

31 January 2026

Turkey Street (Upstream)

12 parameters tested

algae, clarity, conductivity, current weather, current weather description, water surface, phosphate, weather in the past 24hrs, weather in the past 24hrs description, turbidity, water flow, water level

31 January 2026

Turkey Street (Downstream)

11 parameters tested

algae, clarity, conductivity, current weather, current weather description, phosphate, weather in the past 24hrs, weather in the past 24hrs description, turbidity, water flow, water level

30 January 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

30 January 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

30 January 2026

Highams Park Lake

15 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 level, water temperature

30 January 2026

Sainsbury's

2 parameters tested

ammonia, phosphate

29 January 2026

Hobart Corner

18 parameters tested

air temperature, 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, turbidity, water level, water temperature, water use

29 January 2026

Arnos Park Growing Space (downstream)

6 parameters tested

ammonia, conductivity, oxygen, phosphate, turbidity, water temperature

29 January 2026

Arnos Park Growing Space (upstream)

6 parameters tested

ammonia, conductivity, oxygen, phosphate, turbidity, water temperature

29 January 2026

Waterfall Walk 2 (Downstream)

6 parameters tested

ammonia, conductivity, oxygen, phosphate, turbidity, water temperature

29 January 2026

Waterfall Walk 1 (Upstream)

6 parameters tested

ammonia, conductivity, oxygen, phosphate, turbidity, water temperature