River Derwent at Leadmill Bridge Hathersage
EA name: RIVER DERWENT AT LEADMILL BDG HATHERSAGE (also listed as “RIVER DERWENT AT LEADMILL BRIDGE HATHERSAGE”)
Environment Agency sampling point MD-49710500 · Freshwater - rivers · listed as open (“open” does not mean it is sampled now)
These are samples taken on a date, not live readings of the river. Results reach the Environment Agency's archive days to months after the sample is taken, so the newest here may be weeks or months old. FloodRadar does not grade them.
Where and when
- Last sampled
- 7 Oct 2026, 11:3418 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 2 since 6 May 2026 Imported periods: 1 Oct 2023 – 25 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy) · results completed 9 Oct 2026
- Where
- National Grid 423353, 380614As published, to the nearest 1 m. Open in a map
- River, by its own name
- Derwent
- River, by the map
- River DerwentPlaced on the river its name gives, 11 m from the line.
- Next gauge downstream
- Chatsworth On the River Derwent · 15 km along the river
- Nearest gauge upstream
- Mytham Bridge On the River Derwent · 3.1 km along the river
- Why it was sampled
- Monitoring (national agency policy) (2 samples)
Results here were completed a median of 2 days after the sample was taken (2 to 2 days, 1 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
93.3%
Sampled 7 Oct 2026, 18 days ago · 2 results banked
Every result (2)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Oct 2026, 11:34 | 93.3 | 93.3% |
| 6 May 2026, 11:04 | 105.5 | 105.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.7 mg/l
Sampled 7 Oct 2026, 18 days ago · 2 results banked
Every result (2)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Oct 2026, 11:34 | 9.7 | 9.7 mg/l |
| 6 May 2026, 11:04 | 12 | 12 mg/l |
Water temperature
code 0076 · °C
13.5 °C
Sampled 7 Oct 2026, 18 days ago · 2 results banked
Every result (2)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Oct 2026, 11:34 | 13.5 | 13.5 °C |
| 6 May 2026, 11:04 | 9.6 | 9.6 °C |
pH
code 0061
7.55
Sampled 7 Oct 2026, 18 days ago · 2 results banked
Every result (2)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Oct 2026, 11:34 | 7.55 | 7.55 |
| 6 May 2026, 11:04 | 8.61 | 8.61 |
Conductivity
at 25 °C · code 0077 · µS/cm
153 µS/cm
Sampled 7 Oct 2026, 18 days ago · 2 results banked
Every result (2)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Oct 2026, 11:34 | 153 | 153 µS/cm |
| 6 May 2026, 11:04 | 206 | 206 µS/cm |
Everything measured here
5 determinands, each kept by its code, unit and sample material: results in different units or on different materials are never mixed. A “below” result is under the laboratory's detection limit, not zero.
Show all 5 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 2 | May 2026 – Oct 2026 | 93.3% 7 Oct 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 2 | May 2026 – Oct 2026 | 9.7 mg/l 7 Oct 2026 |
| Temperature of Water 0076 | River water | 2 | May 2026 – Oct 2026 | 13.5 °C 7 Oct 2026 |
| pH 0061 | River water | 2 | May 2026 – Oct 2026 | 7.55 7 Oct 2026 |
| Conductivity at 25 C 0077 | River water | 2 | May 2026 – Oct 2026 | 153 µS/cm 7 Oct 2026 |
FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.
Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.
Contains OS data © Crown copyright and database rights 2026.