Dataset

Hogsmill Water Quality

Dataset summary

Observations

18 June 2026

Berrylands Bridge

24 parameters tested

air temperature, algae, alkalinity, ammonia, clarity, colour, conductivity, current weather, hardness, nitrate-nitrogen, nitrate, nitrites, odour, water surface, oxygen, ph, phosphate-phosphorus, phosphate, weather in the past 24hrs, water depth, water flow, water level, water temperature, water use

12 June 2026

Bonegate Stream

17 parameters tested

algae, alkalinity, ammonia, chlorine, clarity, conductivity, current weather, current weather description, odour, water surface, oxygen, ph, phosphate, pollution sources, weather in the past 24hrs, weather in the past 24hrs description, water temperature

11 June 2026

Downstream Stepping Stones

18 parameters tested

air temperature, algae, alkalinity, ammonia, chlorine, clarity, colour, current weather, hardness, nitrate-nitrogen, odour, water surface, oxygen, ph, phosphate, water depth, water flow, water temperature

11 June 2026

Green Lanes A (downstream of old green lanes stream)

17 parameters tested

air temperature, alkalinity, ammonia, chlorine, clarity, colour, current weather, hardness, nitrate-nitrogen, odour, water surface, oxygen, ph, phosphate, water depth, water flow, water temperature

11 June 2026

Ewell Storm Tank

13 parameters tested

air temperature, alkalinity, ammonia, chlorine, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, water depth, water flow, water temperature

26 May 2026

Middle Mill

18 parameters tested

air temperature, alkalinity, chlorine, clarity, colour, conductivity, current weather, current weather description, hardness, nitrate-nitrogen, odour, water surface, ph, phosphate, weather in the past 24hrs, weather in the past 24hrs description, secchi depth (clarity), water temperature

16 May 2026

Chamber Meads Outlet

13 parameters tested

air temperature, alkalinity, ammonia, chlorine, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, water depth, water flow, water temperature

16 May 2026

Chamber Meads Inlet

13 parameters tested

air temperature, alkalinity, ammonia, chlorine, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, water depth, water flow, water temperature

9 May 2026

Downstream Stepping Stones

16 parameters tested

air temperature, alkalinity, ammonia, chlorine, clarity, colour, conductivity, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, water depth, water flow, water temperature

9 May 2026

Green Lanes A (downstream of old green lanes stream)

17 parameters tested

air temperature, alkalinity, ammonia, chlorine, clarity, colour, conductivity, current weather, hardness, nitrate-nitrogen, odour, oxygen, ph, phosphate, water depth, water flow, water temperature

8 May 2026

Ewell Storm Tank

14 parameters tested

air temperature, alkalinity, ammonia, chlorine, conductivity, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, water depth, water flow, water temperature

8 May 2026

Bonesgate

21 parameters tested

air temperature, algae, alkalinity, ammonia, chlorine, clarity, conductivity, current weather, hardness, nitrate, odour, water surface, oxygen, ph, phosphate, pollution sources, weather in the past 24hrs, secchi depth (clarity), water flow, water level, water temperature

7 May 2026

Saipem S1 - Kingston Chamber of Commerce

22 parameters tested

air temperature, algae, alkalinity, ammonia, chlorine, clarity, conductivity, current weather, current weather description, hardness, nitrate, odour, water surface, ph, phosphate, weather in the past 24hrs, weather in the past 24hrs description, secchi depth (clarity), water depth, water flow, water level, water temperature

7 May 2026

Berrylands Bridge

24 parameters tested

air temperature, algae, alkalinity, ammonia, clarity, colour, conductivity, current weather, current weather description, hardness, nitrate-nitrogen, odour, water surface, oxygen, ph, phosphate, pollution sources, weather in the past 24hrs, weather in the past 24hrs description, water depth, water flow, water level, water temperature, water use

28 April 2026

Middle Mill

16 parameters tested

air temperature, alkalinity, ammonia, chlorine, clarity, colour, conductivity, current weather, current weather description, hardness, odour, water surface, ph, weather in the past 24hrs, weather in the past 24hrs description, water temperature

23 April 2026

Chamber Meads Outlet

14 parameters tested

air temperature, alkalinity, ammonia, chlorine, conductivity, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, water depth, water flow, water temperature

23 April 2026

Chamber Meads Inlet

15 parameters tested

air temperature, alkalinity, ammonia, chlorine, conductivity, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, weather in the past 24hrs, water depth, water flow, water temperature

21 April 2026

Saipem S5 - Tolworth Brook

23 parameters tested

air temperature, algae, alkalinity, ammonia, chlorine, clarity, colour, conductivity, current weather, hardness, nitrites, odour, water surface, ph, phosphate, pollution sources, weather in the past 24hrs, secchi depth (clarity), water depth, water flow, water level, water temperature, water use

15 April 2026

Bonegate Stream

24 parameters tested

air temperature, algae, alkalinity, ammonia, chlorine, clarity, colour, conductivity, current weather, current weather description, hardness, nitrate-nitrogen, odour, water surface, oxygen, ph, phosphate, pollution sources, weather in the past 24hrs, water depth, water flow, water level, water temperature, water use

11 April 2026

Downstream Stepping Stones

15 parameters tested

air temperature, alkalinity, ammonia, chlorine, conductivity, current weather, hardness, nitrate-nitrogen, oxygen, ph, phosphate, water depth, water flow, water level, water temperature