River Caldew at the Green, Dalston
EA name: R. CALDEW AT THE GREEN, DALSTON (also listed as “RSN0043 R. CALDEW AT THE GREEN, DALSTON”)
Environment Agency sampling point NW-RSN0043 · 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, 08:0836 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 9 since 12 Jan 2026 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 337022, 549649As published, to the nearest 1 m. Open in a map
- River, by its own name
- Caldew
- River, by the map
- River CaldewPlaced on the river its name gives, 16 m from the line.
- Next gauge downstream
- Cummersdale On the River Caldew · 4.8 km along the river
- Nearest gauge upstream
- Stockdalewath On the Roe Beck · 6.2 km along the riverSebergham On the River Caldew · 9.8 km along the river
- Why it was sampled
- Monitoring (national agency policy) (9 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.7%
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 99.7 | 99.7% |
| 3 Aug 2026, 11:59 | 107.6 | 107.6% |
| 14 Jul 2026, 10:24 | 104.9 | 104.9% |
| 17 Jun 2026, 11:27 | 105.1 | 105.1% |
| 11 May 2026, 10:21 | 105.5 | 105.5% |
| 14 Apr 2026, 09:53 | 104.3 | 104.3% |
| 4 Mar 2026, 10:16 | 104 | 104% |
| 6 Feb 2026, 10:57 | 102.4 | 102.4% |
| 12 Jan 2026, 10:09 | 101.6 | 101.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.2 mg/l
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 10.2 | 10.2 mg/l |
| 3 Aug 2026, 11:59 | 10.6 | 10.6 mg/l |
| 14 Jul 2026, 10:24 | 10.5 | 10.5 mg/l |
| 17 Jun 2026, 11:27 | 10.9 | 10.9 mg/l |
| 11 May 2026, 10:21 | 12.1 | 12.1 mg/l |
| 14 Apr 2026, 09:53 | 12.5 | 12.5 mg/l |
| 4 Mar 2026, 10:16 | 12.8 | 12.8 mg/l |
| 6 Feb 2026, 10:57 | 12.6 | 12.6 mg/l |
| 12 Jan 2026, 10:09 | 12.8 | 12.8 mg/l |
Water temperature
code 0076 · °C
14.3 °C
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 14.3 | 14.3 °C |
| 3 Aug 2026, 11:59 | 16.1 | 16.1 °C |
| 14 Jul 2026, 10:24 | 15.3 | 15.3 °C |
| 17 Jun 2026, 11:27 | 13.5 | 13.5 °C |
| 11 May 2026, 10:21 | 9.2 | 9.2 °C |
| 14 Apr 2026, 09:53 | 7.4 | 7.4 °C |
| 4 Mar 2026, 10:16 | 6.5 | 6.5 °C |
| 6 Feb 2026, 10:57 | 6.4 | 6.4 °C |
| 12 Jan 2026, 10:09 | 5.5 | 5.5 °C |
pH
code 0061
8.19
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 8.19 | 8.19 |
| 3 Aug 2026, 11:59 | 8.32 | 8.32 |
| 14 Jul 2026, 10:24 | 8.28 | 8.28 |
| 17 Jun 2026, 11:27 | 8.12 | 8.12 |
| 11 May 2026, 10:21 | 8.49 | 8.49 |
| 14 Apr 2026, 09:53 | 8.29 | 8.29 |
| 4 Mar 2026, 10:16 | 8.22 | 8.22 |
| 6 Feb 2026, 10:57 | 8.23 | 8.23 |
| 12 Jan 2026, 10:09 | 8.11 | 8.11 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.0065 mg/l
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 0.0065 | 0.0065 mg/l |
| 3 Aug 2026, 11:59 | 0.0059 | 0.0059 mg/l |
| 14 Jul 2026, 10:24 | <0.002 | below 0.002 mg/l (not detected above this) |
| 17 Jun 2026, 11:27 | 0.021 | 0.021 mg/l |
| 11 May 2026, 10:21 | <0.002 | below 0.002 mg/l (not detected above this) |
| 14 Apr 2026, 09:53 | 0.016 | 0.016 mg/l |
| 4 Mar 2026, 10:16 | 0.017 | 0.017 mg/l |
| 6 Feb 2026, 10:57 | 0.0088 | 0.0088 mg/l |
| 12 Jan 2026, 10:09 | 0.23 | 0.23 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.607 mg/l
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 0.607 | 0.607 mg/l |
| 3 Aug 2026, 11:59 | 0.855 | 0.855 mg/l |
| 14 Jul 2026, 10:24 | 0.766 | 0.766 mg/l |
| 17 Jun 2026, 11:27 | 0.664 | 0.664 mg/l |
| 11 May 2026, 10:21 | 0.975 | 0.975 mg/l |
| 14 Apr 2026, 09:53 | 0.837 | 0.837 mg/l |
| 4 Mar 2026, 10:16 | 0.986 | 0.986 mg/l |
| 6 Feb 2026, 10:57 | 1.3 | 1.3 mg/l |
| 12 Jan 2026, 10:09 | 1.09 | 1.09 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.012 mg/l
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 0.012 | 0.012 mg/l |
| 3 Aug 2026, 11:59 | 0.0035 | 0.0035 mg/l |
| 14 Jul 2026, 10:24 | 0.0044 | 0.0044 mg/l |
| 17 Jun 2026, 11:27 | 0.016 | 0.016 mg/l |
| 11 May 2026, 10:21 | 0.0015 | 0.0015 mg/l |
| 14 Apr 2026, 09:53 | 0.013 | 0.013 mg/l |
| 4 Mar 2026, 10:16 | 0.018 | 0.018 mg/l |
| 6 Feb 2026, 10:57 | 0.021 | 0.021 mg/l |
| 12 Jan 2026, 10:09 | 0.069 | 0.069 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
207 µS/cm
Sampled 2 Sep 2026, 36 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 08:08 | 207 | 207 µS/cm |
| 3 Aug 2026, 11:59 | 244 | 244 µS/cm |
| 14 Jul 2026, 10:24 | 224 | 224 µS/cm |
| 17 Jun 2026, 11:27 | 167 | 167 µS/cm |
| 11 May 2026, 10:21 | 260 | 260 µS/cm |
| 14 Apr 2026, 09:53 | 220 | 220 µS/cm |
| 4 Mar 2026, 10:16 | 201 | 201 µS/cm |
| 6 Feb 2026, 10:57 | 237 | 237 µS/cm |
| 12 Jan 2026, 10:09 | 209 | 209 µS/cm |
Everything measured here
21 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 21 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 9 | Jan 2026 – Sep 2026 | 99.7% 2 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 9 | Jan 2026 – Sep 2026 | 10.2 mg/l 2 Sep 2026 |
| Temperature of Water 0076 | River water | 9 | Jan 2026 – Sep 2026 | 14.3 °C 2 Sep 2026 |
| pH 0061 | River water | 9 | Jan 2026 – Sep 2026 | 8.19 2 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 9 | Jan 2026 – Sep 2026 | 0.0065 mg/l 2 Sep 2026 |
| Nitrate as N 0117 | River water | 9 | Jan 2026 – Sep 2026 | 0.607 mg/l 2 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 9 | Jan 2026 – Sep 2026 | 0.012 mg/l 2 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 9 | Jan 2026 – Sep 2026 | 207 µS/cm 2 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 9 | Jan 2026 – Sep 2026 | 76 mg/l 2 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 9 | Jan 2026 – Sep 2026 | 0.00016 mg/l 2 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 9 | Jan 2026 – Sep 2026 | 2.5 mg/l 2 Sep 2026 |
| Chloride 0172 | River water | 9 | Jan 2026 – Sep 2026 | 9 mg/l 2 Sep 2026 |
| Flow Type 2896 | River water | 9 | 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 14 Jul 2026 |
| LCMS Screen : Semi Quantitative 7299 | River water | 3 | Jan 2026 – Jul 2026 | 1 text result 14 Jul 2026 |
| Nitrite as N 0118 | River water | 9 | Jan 2026 – Sep 2026 | 0.003 mg/l 2 Sep 2026 |
| Nitrogen, Total as N 9686 | River water | 9 | Jan 2026 – Sep 2026 | 0.93 mg/l 2 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 9 | Jan 2026 – Sep 2026 | 0.61 mg/l 2 Sep 2026 |
| Phosphorus, Total as P 0348 | River water | 9 | Jan 2026 – Sep 2026 | 0.022 mg/l 2 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 9 | Jan 2026 – Sep 2026 | 4 mg/l 2 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 9 | 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.