Dataset

HMWT - River Guardians

Dataset summary

Observations

10 August 2026

Aspenden Road Bridge (Site 14)

23 parameters tested

ammonia nitrogen, aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

2 August 2026

Cottered (A507)

22 parameters tested

ammonia nitrogen, aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

2 August 2026

Luffenhall

8 parameters tested

channel bed materials, current weather, invasive plants uk, pollution evidence, rain previous 24hrs, shore vegetation, water level, wildlife uk

31 July 2026

Walkern Greenway

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

31 July 2026

Walkern Greenway

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

31 July 2026

Frogmore SB

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

31 July 2026

Walkern Ford

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

31 July 2026

River Green (Site 08)

23 parameters tested

ammonia nitrogen, aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

29 July 2026

Wychdell

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

28 July 2026

Waterford Marsh Central

22 parameters tested

ammonia nitrogen, aquatic vegetation, average depth, channel bed materials, clarity, colour, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

28 July 2026

Chapel End (Site 10)

23 parameters tested

ammonia nitrogen, aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

26 July 2026

Aston Ford

23 parameters tested

ammonia nitrogen, aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

26 July 2026

London Road (B197)

20 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, water flow, water level, water temperature, wildlife uk

25 July 2026

Hartham Common

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

24 July 2026

Woodhall Central

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

21 July 2026

Woodhall Upper

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

9 July 2026

Aspenden Road Bridge (Site 14)

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

2 July 2026

Chapel End (Site 10)

22 parameters tested

aquatic vegetation, average depth, channel bed materials, clarity, colour, conductivity, current weather, estimated width, invasive plants uk, nitrate-nitrogen, nitrite nitrogen, obstacles, outfall observations, phosphate, pollution evidence, rain previous 24hrs, shore vegetation, turbidity, water flow, water level, water temperature, wildlife uk

Concerns
Collecting baseline river health information to use alongside Riverfly results
Intended audience
Our group or organization, Our community
Intended use
Benchmarking of water body or watershed health, Share and compare results across watersheds.