Dearne upstream of Clayton West sewage treatment works
EA name: DEARNE U/S CLAYTON WEST STW
Environment Agency sampling point NE-49301456 · 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
- 27 Aug 2026, 10:3842 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 5 since 14 Apr 2026 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 426593, 411874As published, to the nearest 1 m. Open in a map
- River, by its own name
- Dearne
- River, by the map
- River DearnePlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Darton On the River Dearne · 7.2 km along the river
- Nearest gauge upstream
- Skelmanthorpe Park Gate On the Baildon Dyke · 4.1 km along the riverDenby Dale Norman Road On the River Dearne · 6.2 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (5 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
88.4%
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | 88.4 | 88.4% |
| 21 Jul 2026, 10:18 | 89.5 | 89.5% |
| 25 Jun 2026, 10:23 | 83.5 | 83.5% |
| 21 May 2026, 10:48 | 94 | 94% |
| 14 Apr 2026, 09:55 | 102.6 | 102.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.7 mg/l
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | 8.7 | 8.7 mg/l |
| 21 Jul 2026, 10:18 | 8.98 | 8.98 mg/l |
| 25 Jun 2026, 10:23 | 7.74 | 7.74 mg/l |
| 21 May 2026, 10:48 | 10.2 | 10.2 mg/l |
| 14 Apr 2026, 09:55 | 12.5 | 12.5 mg/l |
Water temperature
code 0076 · °C
16 °C
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | 16 | 16 °C |
| 21 Jul 2026, 10:18 | 15.1 | 15.1 °C |
| 25 Jun 2026, 10:23 | 18.9 | 18.9 °C |
| 21 May 2026, 10:48 | 11.8 | 11.8 °C |
| 14 Apr 2026, 09:55 | 6.8 | 6.8 °C |
pH
code 0061
7.87
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | 7.87 | 7.87 |
| 21 Jul 2026, 10:18 | 7.93 | 7.93 |
| 25 Jun 2026, 10:23 | 7.85 | 7.85 |
| 21 May 2026, 10:48 | 8 | 8 |
| 14 Apr 2026, 09:55 | 7.95 | 7.95 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jul 2026, 10:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2026, 10:23 | 0.041 | 0.041 mg/l |
| 21 May 2026, 10:48 | 0.039 | 0.039 mg/l |
| 14 Apr 2026, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.746 mg/l
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | 0.746 | 0.746 mg/l |
| 21 Jul 2026, 10:18 | 0.666 | 0.666 mg/l |
| 25 Jun 2026, 10:23 | 1.09 | 1.09 mg/l |
| 21 May 2026, 10:48 | 1.68 | 1.68 mg/l |
| 14 Apr 2026, 09:55 | 2.29 | 2.29 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.048 mg/l
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | 0.048 | 0.048 mg/l |
| 21 Jul 2026, 10:18 | 0.033 | 0.033 mg/l |
| 25 Jun 2026, 10:23 | 0.046 | 0.046 mg/l |
| 21 May 2026, 10:48 | 0.023 | 0.023 mg/l |
| 14 Apr 2026, 09:55 | 0.014 | 0.014 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
735 µS/cm
Sampled 27 Aug 2026, 42 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Aug 2026, 10:38 | 735 | 735 µS/cm |
| 21 Jul 2026, 10:18 | 723 | 723 µS/cm |
| 25 Jun 2026, 10:23 | 698 | 698 µS/cm |
| 21 May 2026, 10:48 | 601 | 601 µS/cm |
| 14 Apr 2026, 09:55 | 601 | 601 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 5 | Apr 2026 – Aug 2026 | 88.4% 27 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 5 | Apr 2026 – Aug 2026 | 8.7 mg/l 27 Aug 2026 |
| Temperature of Water 0076 | River water | 5 | Apr 2026 – Aug 2026 | 16 °C 27 Aug 2026 |
| pH 0061 | River water | 5 | Apr 2026 – Aug 2026 | 7.87 27 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 5 | Apr 2026 – Aug 2026 | below 0.03 mg/l 27 Aug 2026 |
| Nitrate as N 0117 | River water | 5 | Apr 2026 – Aug 2026 | 0.746 mg/l 27 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 5 | Apr 2026 – Aug 2026 | 0.048 mg/l 27 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 5 | Apr 2026 – Aug 2026 | 735 µS/cm 27 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 5 | Apr 2026 – Aug 2026 | 150 mg/l 27 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 5 | Apr 2026 – Aug 2026 | below 0.00063 mg/l 27 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 3 | Jun 2026 – Aug 2026 | below 3 mg/l 27 Aug 2026 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 5 | Apr 2026 – Aug 2026 | 12 mg/l 27 Aug 2026 |
| Nitrite as N 0118 | River water | 5 | Apr 2026 – Aug 2026 | below 0.004 mg/l 27 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 5 | Apr 2026 – Aug 2026 | 0.75 mg/l 27 Aug 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.