Castle Syke upstream of Track
EA name: CASTLE SYKE U/S TRACK (also listed as “RSN0604 CASTLE SYKE U/S TRACK”)
Environment Agency sampling point NW-RSN0604 · 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
- 2 Sep 2026, 11:5029 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 8 since 27 Jan 2026 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 355529, 456866As published, to the nearest 1 m. Open in a map
- River, by its own name
- Castle Syke
- River, by the map
- Castle SykePlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Abbeystead Reservoir On the River Wyre · 4.6 km along the river
- Why it was sampled
- Monitoring (national agency policy) (8 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
101.6%
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | 101.6 | 101.6% |
| 24 Jul 2026, 13:11 | 100 | 100% |
| 29 Jun 2026, 11:16 | 103.1 | 103.1% |
| 18 May 2026, 13:18 | 99.9 | 99.9% |
| 30 Apr 2026, 12:48 | 106.2 | 106.2% |
| 27 Mar 2026, 10:57 | 102 | 102% |
| 17 Feb 2026, 11:18 | 98.6 | 98.6% |
| 27 Jan 2026, 12:44 | 97.8 | 97.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.3 mg/l
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | 10.3 | 10.3 mg/l |
| 24 Jul 2026, 13:11 | 9.89 | 9.89 mg/l |
| 29 Jun 2026, 11:16 | 10 | 10 mg/l |
| 18 May 2026, 13:18 | 10.8 | 10.8 mg/l |
| 30 Apr 2026, 12:48 | 10.9 | 10.9 mg/l |
| 27 Mar 2026, 10:57 | 12.4 | 12.4 mg/l |
| 17 Feb 2026, 11:18 | 13 | 13 mg/l |
| 27 Jan 2026, 12:44 | 12.7 | 12.7 mg/l |
Water temperature
code 0076 · °C
14.5 °C
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | 14.5 | 14.5 °C |
| 24 Jul 2026, 13:11 | 15.8 | 15.8 °C |
| 29 Jun 2026, 11:16 | 16.5 | 16.5 °C |
| 18 May 2026, 13:18 | 11.9 | 11.9 °C |
| 30 Apr 2026, 12:48 | 14.1 | 14.1 °C |
| 27 Mar 2026, 10:57 | 6.9 | 6.9 °C |
| 17 Feb 2026, 11:18 | 3.6 | 3.6 °C |
| 27 Jan 2026, 12:44 | 4.4 | 4.4 °C |
pH
code 0061
6.44
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | 6.44 | 6.44 |
| 24 Jul 2026, 13:11 | 7.04 | 7.04 |
| 29 Jun 2026, 11:16 | 7.34 | 7.34 |
| 18 May 2026, 13:18 | 6.97 | 6.97 |
| 30 Apr 2026, 12:48 | 7.48 | 7.48 |
| 27 Mar 2026, 10:57 | 4.74 | 4.74 |
| 17 Feb 2026, 11:18 | 7.2 | 7.2 |
| 27 Jan 2026, 12:44 | 7.66 | 7.66 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.002 mg/l (not detected above this)
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | <0.002 | below 0.002 mg/l (not detected above this) |
| 24 Jul 2026, 13:11 | <0.002 | below 0.002 mg/l (not detected above this) |
| 29 Jun 2026, 11:16 | <0.002 | below 0.002 mg/l (not detected above this) |
| 18 May 2026, 13:18 | <0.002 | below 0.002 mg/l (not detected above this) |
| 30 Apr 2026, 12:48 | <0.002 | below 0.002 mg/l (not detected above this) |
| 27 Mar 2026, 10:57 | <0.002 | below 0.002 mg/l (not detected above this) |
| 17 Feb 2026, 11:18 | 0.0059 | 0.0059 mg/l |
| 27 Jan 2026, 12:44 | <0.002 | below 0.002 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
below 0.028 mg/l (not detected above this)
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | <0.028 | below 0.028 mg/l (not detected above this) |
| 24 Jul 2026, 13:11 | 0.0006 | 0.0006 mg/l |
| 29 Jun 2026, 11:16 | 0.0031 | 0.0031 mg/l |
| 18 May 2026, 13:18 | 0.0062 | 0.0062 mg/l |
| 30 Apr 2026, 12:48 | 0.0037 | 0.0037 mg/l |
| 27 Mar 2026, 10:57 | 0.024 | 0.024 mg/l |
| 17 Feb 2026, 11:18 | 0.055 | 0.055 mg/l |
| 27 Jan 2026, 12:44 | 0.119 | 0.119 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.012 mg/l
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | 0.012 | 0.012 mg/l |
| 24 Jul 2026, 13:11 | 0.027 | 0.027 mg/l |
| 29 Jun 2026, 11:16 | 0.033 | 0.033 mg/l |
| 18 May 2026, 13:18 | 0.0046 | 0.0046 mg/l |
| 30 Apr 2026, 12:48 | 0.013 | 0.013 mg/l |
| 27 Mar 2026, 10:57 | 0.0049 | 0.0049 mg/l |
| 17 Feb 2026, 11:18 | 0.0022 | 0.0022 mg/l |
| 27 Jan 2026, 12:44 | 0.0041 | 0.0041 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
60 µS/cm
Sampled 2 Sep 2026, 29 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 11:50 | 60 | 60 µS/cm |
| 24 Jul 2026, 13:11 | 106 | 106 µS/cm |
| 29 Jun 2026, 11:16 | 75 | 75 µS/cm |
| 18 May 2026, 13:18 | 49 | 49 µS/cm |
| 30 Apr 2026, 12:48 | 81 | 81 µS/cm |
| 27 Mar 2026, 10:57 | 33 | 33 µS/cm |
| 17 Feb 2026, 11:18 | 43 | 43 µS/cm |
| 27 Jan 2026, 12:44 | 39 | 39 µS/cm |
Everything measured here
19 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 19 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 8 | Jan 2026 – Sep 2026 | 101.6% 2 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 8 | Jan 2026 – Sep 2026 | 10.3 mg/l 2 Sep 2026 |
| Temperature of Water 0076 | River water | 8 | Jan 2026 – Sep 2026 | 14.5 °C 2 Sep 2026 |
| pH 0061 | River water | 8 | Jan 2026 – Sep 2026 | 6.44 2 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 8 | Jan 2026 – Sep 2026 | below 0.002 mg/l 2 Sep 2026 |
| Nitrate as N 0117 | River water | 8 | Jan 2026 – Sep 2026 | below 0.028 mg/l 2 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 8 | Jan 2026 – Sep 2026 | 0.012 mg/l 2 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 8 | Jan 2026 – Sep 2026 | 60 µS/cm 2 Sep 2026 |
| Alkalinity to pH 4.5 : Grans Plot 7610 | River water | 8 | Jan 2026 – Sep 2026 | 2.4 mg/l 2 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 8 | Jan 2026 – Sep 2026 | below 0.00001 mg/l 2 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 8 | Jan 2026 – Sep 2026 | 9.6 mg/l 2 Sep 2026 |
| Flow Type 2896 | River water | 7 | Jan 2026 – Sep 2026 | Moderate Flow 2 Sep 2026 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 3 | Jan 2026 – Jul 2026 | 1 text result 24 Jul 2026 |
| LCMS Screen : Semi Quantitative 7299 | River water | 2 | Feb 2026 – May 2026 | 1 text result 18 May 2026 |
| Nitrite as N 0118 | River water | 8 | Jan 2026 – Sep 2026 | below 0.002 mg/l 2 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 8 | Jan 2026 – Sep 2026 | below 0.03 mg/l 2 Sep 2026 |
| Phosphorus, Total as P 0348 | River water | 8 | Jan 2026 – Sep 2026 | 0.018 mg/l 2 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 8 | Jan 2026 – Sep 2026 | 3.6 mg/l 2 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 8 | Jan 2026 – Sep 2026 | below 3 mg/l 2 Sep 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.