Trawden Brook downstream of Hollin Hall
EA name: TRAWDEN BROOK D/S HOLLIN HALL (also listed as “RSN0284 TRAWDEN BROOK D/S HOLLIN HALL”)
Environment Agency sampling point NW-RSN0284 · 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
- 11 Dec 2024, 11:0922 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 8 Oct 2026 and had nothing newer.
- Samples banked
- 15 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 391389, 438489As published, to the nearest 1 m. Open in a map
- River, by its own name
- Trawden Brook
- River, by the map
- Trawden BrookPlaced on the river its name gives, 4 m from the line.
- Next gauge downstream
- Trawden Brook On the Trawden Brook · 1.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (15 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
103.5%
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 103.5 | 103.5% |
| 7 Nov 2024, 09:58 | 98.9 | 98.9% |
| 8 Oct 2024, 13:52 | 100.4 | 100.4% |
| 19 Sep 2024, 11:40 | 103.9 | 103.9% |
| 5 Aug 2024, 10:44 | 101.9 | 101.9% |
| 2 Jul 2024, 13:46 | 99.4 | 99.4% |
| 6 Jun 2024, 10:12 | 98.3 | 98.3% |
| 10 May 2024, 11:28 | 109.3 | 109.3% |
| 8 Apr 2024, 11:42 | 106.4 | 106.4% |
| 11 Mar 2024, 12:01 | 101.7 | 101.7% |
| 14 Feb 2024, 12:39 | 101.6 | 101.6% |
| 12 Jan 2024, 10:48 | 100.1 | 100.1% |
| 4 Dec 2023, 10:48 | 100.7 | 100.7% |
| 7 Nov 2023, 11:21 | 99.2 | 99.2% |
| 2 Oct 2023, 11:28 | 95.6 | 95.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.9 mg/l
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 12.9 | 12.9 mg/l |
| 7 Nov 2024, 09:58 | 11.1 | 11.1 mg/l |
| 8 Oct 2024, 13:52 | 10.7 | 10.7 mg/l |
| 19 Sep 2024, 11:40 | 10.9 | 10.9 mg/l |
| 5 Aug 2024, 10:44 | 10.1 | 10.1 mg/l |
| 2 Jul 2024, 13:46 | 10.6 | 10.6 mg/l |
| 6 Jun 2024, 10:12 | 11 | 11 mg/l |
| 10 May 2024, 11:28 | 11.3 | 11.3 mg/l |
| 8 Apr 2024, 11:42 | 12.1 | 12.1 mg/l |
| 11 Mar 2024, 12:01 | 12.5 | 12.5 mg/l |
| 14 Feb 2024, 12:39 | 12.1 | 12.1 mg/l |
| 12 Jan 2024, 10:48 | 12.7 | 12.7 mg/l |
| 4 Dec 2023, 10:48 | 13.1 | 13.1 mg/l |
| 7 Nov 2023, 11:21 | 11.3 | 11.3 mg/l |
| 2 Oct 2023, 11:28 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
6 °C
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 6 | 6 °C |
| 7 Nov 2024, 09:58 | 10 | 10 °C |
| 8 Oct 2024, 13:52 | 12.3 | 12.3 °C |
| 19 Sep 2024, 11:40 | 13.2 | 13.2 °C |
| 5 Aug 2024, 10:44 | 15.9 | 15.9 °C |
| 2 Jul 2024, 13:46 | 12.5 | 12.5 °C |
| 6 Jun 2024, 10:12 | 10.4 | 10.4 °C |
| 10 May 2024, 11:28 | 13.9 | 13.9 °C |
| 8 Apr 2024, 11:42 | 9.6 | 9.6 °C |
| 11 Mar 2024, 12:01 | 6.6 | 6.6 °C |
| 14 Feb 2024, 12:39 | 7.8 | 7.8 °C |
| 12 Jan 2024, 10:48 | 5.3 | 5.3 °C |
| 4 Dec 2023, 10:48 | 4.1 | 4.1 °C |
| 7 Nov 2023, 11:21 | 9.4 | 9.4 °C |
| 2 Oct 2023, 11:28 | 13 | 13 °C |
pH
code 0061
8.29
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 8.29 | 8.29 |
| 7 Nov 2024, 09:58 | 8.09 | 8.09 |
| 8 Oct 2024, 13:52 | 7.88 | 7.88 |
| 19 Sep 2024, 11:40 | 8.19 | 8.19 |
| 5 Aug 2024, 10:44 | 8.21 | 8.21 |
| 2 Jul 2024, 13:46 | 8.07 | 8.07 |
| 6 Jun 2024, 10:12 | 8.08 | 8.08 |
| 10 May 2024, 11:28 | 8.6 | 8.6 |
| 8 Apr 2024, 11:42 | 8.16 | 8.16 |
| 11 Mar 2024, 12:01 | 8.04 | 8.04 |
| 14 Feb 2024, 12:39 | 7.96 | 7.96 |
| 12 Jan 2024, 10:48 | 8.12 | 8.12 |
| 4 Dec 2023, 10:48 | 8 | 8 |
| 7 Nov 2023, 11:21 | 7.79 | 7.79 |
| 2 Oct 2023, 11:28 | 7.92 | 7.92 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.018 mg/l
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 0.018 | 0.018 mg/l |
| 7 Nov 2024, 09:58 | 0.064 | 0.064 mg/l |
| 8 Oct 2024, 13:52 | <0.002 | below 0.002 mg/l (not detected above this) |
| 19 Sep 2024, 11:40 | <0.002 | below 0.002 mg/l (not detected above this) |
| 5 Aug 2024, 10:44 | 0.023 | 0.023 mg/l |
| 2 Jul 2024, 13:46 | <0.002 | below 0.002 mg/l (not detected above this) |
| 6 Jun 2024, 10:12 | 0.13 | 0.13 mg/l |
| 10 May 2024, 11:28 | 0.023 | 0.023 mg/l |
| 8 Apr 2024, 11:42 | 0.0092 | 0.0092 mg/l |
| 11 Mar 2024, 12:01 | 0.015 | 0.015 mg/l |
| 14 Feb 2024, 12:39 | 0.023 | 0.023 mg/l |
| 12 Jan 2024, 10:48 | 0.031 | 0.031 mg/l |
| 4 Dec 2023, 10:48 | 0.077 | 0.077 mg/l |
| 7 Nov 2023, 11:21 | 0.011 | 0.011 mg/l |
| 2 Oct 2023, 11:28 | 0.01 | 0.01 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.784 mg/l
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 0.784 | 0.784 mg/l |
| 7 Nov 2024, 09:58 | 0.608 | 0.608 mg/l |
| 8 Oct 2024, 13:52 | 0.407 | 0.407 mg/l |
| 19 Sep 2024, 11:40 | 0.574 | 0.574 mg/l |
| 5 Aug 2024, 10:44 | 0.753 | 0.753 mg/l |
| 2 Jul 2024, 13:46 | 0.547 | 0.547 mg/l |
| 6 Jun 2024, 10:12 | 0.707 | 0.707 mg/l |
| 10 May 2024, 11:28 | 0.655 | 0.655 mg/l |
| 8 Apr 2024, 11:42 | 0.434 | 0.434 mg/l |
| 11 Mar 2024, 12:01 | 0.525 | 0.525 mg/l |
| 14 Feb 2024, 12:39 | 0.407 | 0.407 mg/l |
| 12 Jan 2024, 10:48 | 0.844 | 0.844 mg/l |
| 4 Dec 2023, 10:48 | 0.691 | 0.691 mg/l |
| 7 Nov 2023, 11:21 | 0.357 | 0.357 mg/l |
| 2 Oct 2023, 11:28 | 0.256 | 0.256 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.021 mg/l
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 0.021 | 0.021 mg/l |
| 7 Nov 2024, 09:58 | 0.029 | 0.029 mg/l |
| 8 Oct 2024, 13:52 | 0.021 | 0.021 mg/l |
| 19 Sep 2024, 11:40 | 0.038 | 0.038 mg/l |
| 5 Aug 2024, 10:44 | 0.038 | 0.038 mg/l |
| 2 Jul 2024, 13:46 | 0.027 | 0.027 mg/l |
| 6 Jun 2024, 10:12 | 0.034 | 0.034 mg/l |
| 10 May 2024, 11:28 | 0.017 | 0.017 mg/l |
| 8 Apr 2024, 11:42 | 0.016 | 0.016 mg/l |
| 11 Mar 2024, 12:01 | 0.017 | 0.017 mg/l |
| 14 Feb 2024, 12:39 | 0.022 | 0.022 mg/l |
| 12 Jan 2024, 10:48 | 0.019 | 0.019 mg/l |
| 4 Dec 2023, 10:48 | 0.024 | 0.024 mg/l |
| 7 Nov 2023, 11:21 | 0.025 | 0.025 mg/l |
| 2 Oct 2023, 11:28 | 0.023 | 0.023 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
169 µS/cm
Sampled 11 Dec 2024, 22 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Dec 2024, 11:09 | 169 | 169 µS/cm |
| 7 Nov 2024, 09:58 | 196 | 196 µS/cm |
| 8 Oct 2024, 13:52 | 166 | 166 µS/cm |
| 19 Sep 2024, 11:40 | 211 | 211 µS/cm |
| 5 Aug 2024, 10:44 | 318 | 318 µS/cm |
| 2 Jul 2024, 13:46 | 205 | 205 µS/cm |
| 6 Jun 2024, 10:12 | 190 | 190 µS/cm |
| 10 May 2024, 11:28 | 224 | 224 µS/cm |
| 8 Apr 2024, 11:42 | 135 | 135 µS/cm |
| 11 Mar 2024, 12:01 | 135 | 135 µS/cm |
| 14 Feb 2024, 12:39 | 86 | 86 µS/cm |
| 12 Jan 2024, 10:48 | 157 | 157 µS/cm |
| 4 Dec 2023, 10:48 | 189 | 189 µS/cm |
| 7 Nov 2023, 11:21 | 105 | 105 µS/cm |
| 2 Oct 2023, 11:28 | 138 | 138 µS/cm |
Everything measured here
17 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 17 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 15 | Oct 2023 – Dec 2024 | 103.5% 11 Dec 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 15 | Oct 2023 – Dec 2024 | 12.9 mg/l 11 Dec 2024 |
| Temperature of Water 0076 | River water | 15 | Oct 2023 – Dec 2024 | 6 °C 11 Dec 2024 |
| pH 0061 | River water | 15 | Oct 2023 – Dec 2024 | 8.29 11 Dec 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Oct 2023 – Dec 2024 | 0.018 mg/l 11 Dec 2024 |
| Nitrate as N 0117 | River water | 15 | Oct 2023 – Dec 2024 | 0.784 mg/l 11 Dec 2024 |
| Orthophosphate, reactive as P 0180 | River water | 15 | Oct 2023 – Dec 2024 | 0.021 mg/l 11 Dec 2024 |
| Conductivity at 25 C 0077 | River water | 15 | Oct 2023 – Dec 2024 | 169 µS/cm 11 Dec 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 15 | Oct 2023 – Dec 2024 | 63 mg/l 11 Dec 2024 |
| Ammonia un-ionised as N 0119 | River water | 15 | Oct 2023 – Dec 2024 | 0.00024 mg/l 11 Dec 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 15 | Oct 2023 – Dec 2024 | 5.4 mg/l 11 Dec 2024 |
| Chloride 0172 | River water | 15 | Oct 2023 – Dec 2024 | 7.6 mg/l 11 Dec 2024 |
| Flow Type 2896 | River water | 3 | Sep 2024 – Dec 2024 | Moderate Flow 11 Dec 2024 |
| Nitrite as N 0118 | River water | 15 | Oct 2023 – Dec 2024 | 0.0056 mg/l 11 Dec 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 15 | Oct 2023 – Dec 2024 | 0.79 mg/l 11 Dec 2024 |
| Phosphorus, Total as P 0348 | River water | 15 | Oct 2023 – Dec 2024 | 0.028 mg/l 11 Dec 2024 |
| Silica, reactive as SiO2 0182 | River water | 15 | Oct 2023 – Dec 2024 | 7 mg/l 11 Dec 2024 |
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.