Grizedale Brook at Pedders Wood
EA name: RSN1320 GRIZEDALE BROOK @ PEDDERS WOOD
Environment Agency sampling point NW-RSN1320 · 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
- 10 Dec 2025, 11:2910 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 12 since 14 Jan 2025 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 351460, 448044As published, to the nearest 1 m. Open in a map
- River, by its own name
- Grizedale Brook
- River, by the map
- Grizedale BrookPlaced on the river its name gives, 9 m from the line.
- Next gauge downstream
- Garstang On the River Wyre · 5.2 km along the river (the path rests on a repair to the map)
- Why it was sampled
- Monitoring (national agency policy) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.9%
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 99.9 | 99.9% |
| 17 Nov 2025, 10:24 | 98.3 | 98.3% |
| 6 Oct 2025, 10:11 | 98.7 | 98.7% |
| 22 Sep 2025, 10:44 | 98.8 | 98.8% |
| 26 Aug 2025, 13:13 | 88.6 | 88.6% |
| 21 Jul 2025, 12:31 | 95.7 | 95.7% |
| 9 Jun 2025, 10:15 | 94.6 | 94.6% |
| 9 May 2025, 10:31 | 96.6 | 96.6% |
| 3 Apr 2025, 14:12 | 101.9 | 101.9% |
| 3 Mar 2025, 08:42 | 99.9 | 99.9% |
| 11 Feb 2025, 10:53 | 99.6 | 99.6% |
| 14 Jan 2025, 10:05 | 100.4 | 100.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.7 mg/l
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 11.7 | 11.7 mg/l |
| 17 Nov 2025, 10:24 | 11.8 | 11.8 mg/l |
| 6 Oct 2025, 10:11 | 10.6 | 10.6 mg/l |
| 22 Sep 2025, 10:44 | 10.8 | 10.8 mg/l |
| 26 Aug 2025, 13:13 | 8.81 | 8.81 mg/l |
| 21 Jul 2025, 12:31 | 9.58 | 9.58 mg/l |
| 9 Jun 2025, 10:15 | 10.4 | 10.4 mg/l |
| 9 May 2025, 10:31 | 11.2 | 11.2 mg/l |
| 3 Apr 2025, 14:12 | 11.5 | 11.5 mg/l |
| 3 Mar 2025, 08:42 | 12.6 | 12.6 mg/l |
| 11 Feb 2025, 10:53 | 12.7 | 12.7 mg/l |
| 14 Jan 2025, 10:05 | 12.9 | 12.9 mg/l |
Water temperature
code 0076 · °C
8.5 °C
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 8.5 | 8.5 °C |
| 17 Nov 2025, 10:24 | 7.3 | 7.3 °C |
| 6 Oct 2025, 10:11 | 12.2 | 12.2 °C |
| 22 Sep 2025, 10:44 | 11.3 | 11.3 °C |
| 26 Aug 2025, 13:13 | 15.5 | 15.5 °C |
| 21 Jul 2025, 12:31 | 15.2 | 15.2 °C |
| 9 Jun 2025, 10:15 | 11.1 | 11.1 °C |
| 9 May 2025, 10:31 | 8.8 | 8.8 °C |
| 3 Apr 2025, 14:12 | 9.9 | 9.9 °C |
| 3 Mar 2025, 08:42 | 5.5 | 5.5 °C |
| 11 Feb 2025, 10:53 | 4.9 | 4.9 °C |
| 14 Jan 2025, 10:05 | 4.6 | 4.6 °C |
pH
code 0061
7.96
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 7.96 | 7.96 |
| 17 Nov 2025, 10:24 | 7.36 | 7.36 |
| 6 Oct 2025, 10:11 | 7.34 | 7.34 |
| 22 Sep 2025, 10:44 | 8.17 | 8.17 |
| 26 Aug 2025, 13:13 | 7.6 | 7.6 |
| 21 Jul 2025, 12:31 | 7.6 | 7.6 |
| 9 Jun 2025, 10:15 | 7.34 | 7.34 |
| 9 May 2025, 10:31 | 7.84 | 7.84 |
| 3 Apr 2025, 14:12 | 7.65 | 7.65 |
| 3 Mar 2025, 08:42 | 7.75 | 7.75 |
| 11 Feb 2025, 10:53 | 7.47 | 7.47 |
| 14 Jan 2025, 10:05 | 7.42 | 7.42 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.0023 mg/l
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 0.0023 | 0.0023 mg/l |
| 17 Nov 2025, 10:24 | 0.0034 | 0.0034 mg/l |
| 6 Oct 2025, 10:11 | 0.0058 | 0.0058 mg/l |
| 22 Sep 2025, 10:44 | <0.002 | below 0.002 mg/l (not detected above this) |
| 26 Aug 2025, 13:13 | <0.002 | below 0.002 mg/l (not detected above this) |
| 21 Jul 2025, 12:31 | 0.0025 | 0.0025 mg/l |
| 9 Jun 2025, 10:15 | 0.0061 | 0.0061 mg/l |
| 9 May 2025, 10:31 | 0.0087 | 0.0087 mg/l |
| 3 Apr 2025, 14:12 | 0.0028 | 0.0028 mg/l |
| 3 Mar 2025, 08:42 | <0.002 | below 0.002 mg/l (not detected above this) |
| 11 Feb 2025, 10:53 | <0.002 | below 0.002 mg/l (not detected above this) |
| 14 Jan 2025, 10:05 | 0.03 | 0.03 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.859 mg/l
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 0.859 | 0.859 mg/l |
| 17 Nov 2025, 10:24 | 0.938 | 0.938 mg/l |
| 6 Oct 2025, 10:11 | 0.708 | 0.708 mg/l |
| 22 Sep 2025, 10:44 | 0.958 | 0.958 mg/l |
| 26 Aug 2025, 13:13 | 0.449 | 0.449 mg/l |
| 21 Jul 2025, 12:31 | 0.679 | 0.679 mg/l |
| 9 Jun 2025, 10:15 | 1.1 | 1.1 mg/l |
| 9 May 2025, 10:31 | 0.569 | 0.569 mg/l |
| 3 Apr 2025, 14:12 | 0.719 | 0.719 mg/l |
| 3 Mar 2025, 08:42 | 0.789 | 0.789 mg/l |
| 11 Feb 2025, 10:53 | 0.778 | 0.778 mg/l |
| 14 Jan 2025, 10:05 | 0.786 | 0.786 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.0094 mg/l
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 0.0094 | 0.0094 mg/l |
| 17 Nov 2025, 10:24 | 0.0085 | 0.0085 mg/l |
| 6 Oct 2025, 10:11 | 0.0071 | 0.0071 mg/l |
| 22 Sep 2025, 10:44 | 0.0085 | 0.0085 mg/l |
| 26 Aug 2025, 13:13 | 0.0052 | 0.0052 mg/l |
| 21 Jul 2025, 12:31 | 0.0068 | 0.0068 mg/l |
| 9 Jun 2025, 10:15 | 0.0038 | 0.0038 mg/l |
| 9 May 2025, 10:31 | 0.0039 | 0.0039 mg/l |
| 3 Apr 2025, 14:12 | 0.0032 | 0.0032 mg/l |
| 3 Mar 2025, 08:42 | 0.0054 | 0.0054 mg/l |
| 11 Feb 2025, 10:53 | 0.0084 | 0.0084 mg/l |
| 14 Jan 2025, 10:05 | 0.014 | 0.014 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
91 µS/cm
Sampled 10 Dec 2025, 10 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2025, 11:29 | 91 | 91 µS/cm |
| 17 Nov 2025, 10:24 | 110 | 110 µS/cm |
| 6 Oct 2025, 10:11 | 100 | 100 µS/cm |
| 22 Sep 2025, 10:44 | 141 | 141 µS/cm |
| 26 Aug 2025, 13:13 | 237 | 237 µS/cm |
| 21 Jul 2025, 12:31 | 123 | 123 µS/cm |
| 9 Jun 2025, 10:15 | 158 | 158 µS/cm |
| 9 May 2025, 10:31 | 131 | 131 µS/cm |
| 3 Apr 2025, 14:12 | 134 | 134 µS/cm |
| 3 Mar 2025, 08:42 | 110 | 110 µS/cm |
| 11 Feb 2025, 10:53 | 93 | 93 µS/cm |
| 14 Jan 2025, 10:05 | 82 | 82 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 12 | Jan 2025 – Dec 2025 | 99.9% 10 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 12 | Jan 2025 – Dec 2025 | 11.7 mg/l 10 Dec 2025 |
| Temperature of Water 0076 | River water | 12 | Jan 2025 – Dec 2025 | 8.5 °C 10 Dec 2025 |
| pH 0061 | River water | 12 | Jan 2025 – Dec 2025 | 7.96 10 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Jan 2025 – Dec 2025 | 0.0023 mg/l 10 Dec 2025 |
| Nitrate as N 0117 | River water | 12 | Jan 2025 – Dec 2025 | 0.859 mg/l 10 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 12 | Jan 2025 – Dec 2025 | 0.0094 mg/l 10 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 12 | Jan 2025 – Dec 2025 | 91 µS/cm 10 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 12 | Jan 2025 – Dec 2025 | 19 mg/l 10 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 12 | Jan 2025 – Dec 2025 | 0.00003 mg/l 10 Dec 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 11 | Jan 2025 – Dec 2025 | 7.7 mg/l 10 Dec 2025 |
| Chloride 0172 | River water | 12 | Jan 2025 – Dec 2025 | 11 mg/l 10 Dec 2025 |
| Flow Type 2896 | River water | 10 | Jan 2025 – Dec 2025 | Moderate Flow 10 Dec 2025 |
| Nitrite as N 0118 | River water | 12 | Jan 2025 – Dec 2025 | 0.0014 mg/l 10 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 12 | Jan 2025 – Dec 2025 | 0.86 mg/l 10 Dec 2025 |
| Phosphorus, Total as P 0348 | River water | 12 | Jan 2025 – Dec 2025 | 0.024 mg/l 10 Dec 2025 |
| Silica, reactive as SiO2 0182 | River water | 12 | Jan 2025 – Dec 2025 | 4.8 mg/l 10 Dec 2025 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Dec 2025 – Dec 2025 | 4.6 mg/l 10 Dec 2025 |
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.