Rolleston Brook - downstream of Rolleston sewage treatment works
EA name: ROLLESTON BROOK - D/S ROLLESTON STW (also listed as “ROLLESTON BROOK (ALDER BROOK) - D/S ROLLESTON STW”)
Environment Agency sampling point MD-55004105 · 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
- 3 Aug 2026, 17:152 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 9 since 10 Jun 2024 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 424400, 328400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Rolleston Brook
- River, by the map
- Rolleston BrookPlaced on the river its name gives, 306 m from the line.
- Next gauge downstream
- Willington On the River Trent · 10.0 km along the river (the path rests on a repair to the map)
- Nearest gauge upstream
- Anslow On the Rolleston Brook · 2.4 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (9 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
75.4%
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | 75.4 | 75.4% |
| 6 Jul 2026, 11:18 | 54 | 54% |
| 8 Jun 2026, 15:38 | 83.9 | 83.9% |
| 12 Dec 2024, 10:11 | 86.4 | 86.4% |
| 13 Nov 2024, 13:31 | 87.6 | 87.6% |
| 30 Oct 2024, 12:10 | 95 | 95% |
| 4 Sep 2024, 12:41 | 91 | 91% |
| 9 Aug 2024, 11:27 | 76.5 | 76.5% |
| 10 Jun 2024, 13:47 | 89 | 89% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.84 mg/l
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | 6.84 | 6.84 mg/l |
| 6 Jul 2026, 11:18 | 5.03 | 5.03 mg/l |
| 8 Jun 2026, 15:38 | 8.37 | 8.37 mg/l |
| 12 Dec 2024, 10:11 | 10.5 | 10.5 mg/l |
| 13 Nov 2024, 13:31 | 9.71 | 9.71 mg/l |
| 30 Oct 2024, 12:10 | 10.2 | 10.2 mg/l |
| 4 Sep 2024, 12:41 | 9.13 | 9.13 mg/l |
| 9 Aug 2024, 11:27 | 7.39 | 7.39 mg/l |
| 10 Jun 2024, 13:47 | 9.03 | 9.03 mg/l |
Water temperature
code 0076 · °C
20 °C
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | 20 | 20 °C |
| 6 Jul 2026, 11:18 | 18.7 | 18.7 °C |
| 8 Jun 2026, 15:38 | 15.4 | 15.4 °C |
| 12 Dec 2024, 10:11 | 6.8 | 6.8 °C |
| 13 Nov 2024, 13:31 | 10.7 | 10.7 °C |
| 30 Oct 2024, 12:10 | 12 | 12 °C |
| 4 Sep 2024, 12:41 | 15.1 | 15.1 °C |
| 9 Aug 2024, 11:27 | 16.9 | 16.9 °C |
| 10 Jun 2024, 13:47 | 14.6 | 14.6 °C |
pH
code 0061
7.88
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | 7.88 | 7.88 |
| 6 Jul 2026, 11:18 | 7.77 | 7.77 |
| 8 Jun 2026, 15:38 | 7.95 | 7.95 |
| 12 Dec 2024, 10:11 | 7.99 | 7.99 |
| 13 Nov 2024, 13:31 | 7.94 | 7.94 |
| 30 Oct 2024, 12:10 | 8 | 8 |
| 4 Sep 2024, 12:41 | 7.99 | 7.99 |
| 9 Aug 2024, 11:27 | 8 | 8 |
| 10 Jun 2024, 13:47 | 8.29 | 8.29 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jul 2026, 11:18 | 0.064 | 0.064 mg/l |
| 8 Jun 2026, 15:38 | 0.068 | 0.068 mg/l |
| 12 Dec 2024, 10:11 | 0.052 | 0.052 mg/l |
| 13 Nov 2024, 13:31 | 0.068 | 0.068 mg/l |
| 30 Oct 2024, 12:10 | 0.031 | 0.031 mg/l |
| 4 Sep 2024, 12:41 | 0.038 | 0.038 mg/l |
| 9 Aug 2024, 11:27 | 0.042 | 0.042 mg/l |
| 10 Jun 2024, 13:47 | 0.033 | 0.033 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.08 mg/l
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | 6.08 | 6.08 mg/l |
| 6 Jul 2026, 11:18 | 5.3 | 5.3 mg/l |
| 8 Jun 2026, 15:38 | 5.43 | 5.43 mg/l |
| 12 Dec 2024, 10:11 | 5.57 | 5.57 mg/l |
| 13 Nov 2024, 13:31 | 8.86 | 8.86 mg/l |
| 30 Oct 2024, 12:10 | 6.47 | 6.47 mg/l |
| 4 Sep 2024, 12:41 | 7.84 | 7.84 mg/l |
| 9 Aug 2024, 11:27 | 7.65 | 7.65 mg/l |
| 10 Jun 2024, 13:47 | 8.65 | 8.65 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.15 mg/l
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | 0.15 | 0.15 mg/l |
| 6 Jul 2026, 11:18 | 0.24 | 0.24 mg/l |
| 8 Jun 2026, 15:38 | 0.2 | 0.2 mg/l |
| 12 Dec 2024, 10:11 | 0.16 | 0.16 mg/l |
| 13 Nov 2024, 13:31 | 0.14 | 0.14 mg/l |
| 30 Oct 2024, 12:10 | 0.16 | 0.16 mg/l |
| 4 Sep 2024, 12:41 | 0.13 | 0.13 mg/l |
| 9 Aug 2024, 11:27 | 0.14 | 0.14 mg/l |
| 10 Jun 2024, 13:47 | 0.13 | 0.13 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1696 µS/cm
Sampled 3 Aug 2026, 2 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 17:15 | 1696 | 1696 µS/cm |
| 6 Jul 2026, 11:18 | 1607 | 1607 µS/cm |
| 8 Jun 2026, 15:38 | 1308 | 1308 µS/cm |
| 12 Dec 2024, 10:11 | 1021 | 1021 µS/cm |
| 13 Nov 2024, 13:31 | 669 | 669 µS/cm |
| 30 Oct 2024, 12:10 | 1200 | 1200 µS/cm |
| 4 Sep 2024, 12:41 | 1573 | 1573 µS/cm |
| 9 Aug 2024, 11:27 | 1482 | 1482 µS/cm |
| 10 Jun 2024, 13:47 | 6437 | 6437 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 9 | Jun 2024 – Aug 2026 | 75.4% 3 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 9 | Jun 2024 – Aug 2026 | 6.84 mg/l 3 Aug 2026 |
| Temperature of Water 0076 | River water | 9 | Jun 2024 – Aug 2026 | 20 °C 3 Aug 2026 |
| pH 0061 | River water | 9 | Jun 2024 – Aug 2026 | 7.88 3 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 9 | Jun 2024 – Aug 2026 | below 0.03 mg/l 3 Aug 2026 |
| Nitrate as N 0117 | River water | 9 | Jun 2024 – Aug 2026 | 6.08 mg/l 3 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 9 | Jun 2024 – Aug 2026 | 0.15 mg/l 3 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 9 | Jun 2024 – Aug 2026 | 1696 µS/cm 3 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 9 | Jun 2024 – Aug 2026 | 240 mg/l 3 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 9 | Jun 2024 – Aug 2026 | below 0.00087 mg/l 3 Aug 2026 |
| Nitrite as N 0118 | River water | 9 | Jun 2024 – Aug 2026 | 0.023 mg/l 3 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 9 | Jun 2024 – Aug 2026 | 6.1 mg/l 3 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.