Godmanchester Lock
EA name: GODMANCHESTER LOCK (also listed as “RSN0689 GODMANCHESTER LOCK”)
Environment Agency sampling point AN-RSN0689 · 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 Sep 2026, 09:1351 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 – 24 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy) · results completed 10 Sep 2026
- Where
- National Grid 524253, 270450As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- River Great OusePlaced by position alone, on a line whose map name differs from its own, 15 m from the line.
- Next gauge downstream
- Godmanchester On the River Great Ouse · 0.2 km along the river
- Nearest gauge upstream
- Brampton Sluice On the River Great Ouse · 2.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (9 samples)
Results here were completed a median of 17 days after the sample was taken (7 to 41 days, 3 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
67.5%
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 67.5 | 67.5% |
| 6 Aug 2026, 13:37 | 78.8 | 78.8% |
| 6 Jul 2026, 09:28 | 100 | 100% |
| 3 Jun 2026, 08:17 | 70 | 70% |
| 20 May 2026, 14:17 | 94.9 | 94.9% |
| 23 Apr 2026, 12:41 | 90.2 | 90.2% |
| 24 Mar 2026, 14:21 | 97.1 | 97.1% |
| 5 Feb 2026, 09:38 | 95.6 | 95.6% |
| 12 Jan 2026, 11:52 | 101 | 101% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.23 mg/l
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 6.23 | 6.23 mg/l |
| 6 Aug 2026, 13:37 | 6.99 | 6.99 mg/l |
| 6 Jul 2026, 09:28 | 8.5 | 8.5 mg/l |
| 3 Jun 2026, 08:17 | 6.43 | 6.43 mg/l |
| 20 May 2026, 14:17 | 9.54 | 9.54 mg/l |
| 23 Apr 2026, 12:41 | 9.41 | 9.41 mg/l |
| 24 Mar 2026, 14:21 | 10.8 | 10.8 mg/l |
| 5 Feb 2026, 09:38 | 11.8 | 11.8 mg/l |
| 12 Jan 2026, 11:52 | 12.9 | 12.9 mg/l |
Water temperature
code 0076 · °C
19.1 °C
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 19.1 | 19.1 °C |
| 6 Aug 2026, 13:37 | 21.1 | 21.1 °C |
| 6 Jul 2026, 09:28 | 23.3 | 23.3 °C |
| 3 Jun 2026, 08:17 | 19.3 | 19.3 °C |
| 20 May 2026, 14:17 | 15 | 15 °C |
| 23 Apr 2026, 12:41 | 13.3 | 13.3 °C |
| 24 Mar 2026, 14:21 | 10.7 | 10.7 °C |
| 5 Feb 2026, 09:38 | 6.4 | 6.4 °C |
| 12 Jan 2026, 11:52 | 4.8 | 4.8 °C |
pH
code 0061
7.61
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 7.61 | 7.61 |
| 6 Aug 2026, 13:37 | 7.78 | 7.78 |
| 6 Jul 2026, 09:28 | 7.95 | 7.95 |
| 3 Jun 2026, 08:17 | 7.71 | 7.71 |
| 20 May 2026, 14:17 | 7.97 | 7.97 |
| 23 Apr 2026, 12:41 | 7.93 | 7.93 |
| 24 Mar 2026, 14:21 | 8.08 | 8.08 |
| 5 Feb 2026, 09:38 | 8.12 | 8.12 |
| 12 Jan 2026, 11:52 | 7.94 | 7.94 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.055 mg/l
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 0.055 | 0.055 mg/l |
| 6 Aug 2026, 13:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jul 2026, 09:28 | 0.039 | 0.039 mg/l |
| 3 Jun 2026, 08:17 | 0.11 | 0.11 mg/l |
| 20 May 2026, 14:17 | 0.17 | 0.17 mg/l |
| 23 Apr 2026, 12:41 | 0.22 | 0.22 mg/l |
| 24 Mar 2026, 14:21 | 0.24 | 0.24 mg/l |
| 5 Feb 2026, 09:38 | 0.069 | 0.069 mg/l |
| 12 Jan 2026, 11:52 | 0.21 | 0.21 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.43 mg/l
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 9.43 | 9.43 mg/l |
| 6 Aug 2026, 13:37 | 8.97 | 8.97 mg/l |
| 6 Jul 2026, 09:28 | 6.36 | 6.36 mg/l |
| 3 Jun 2026, 08:17 | 8.27 | 8.27 mg/l |
| 20 May 2026, 14:17 | 8.85 | 8.85 mg/l |
| 23 Apr 2026, 12:41 | 8.39 | 8.39 mg/l |
| 24 Mar 2026, 14:21 | 8.12 | 8.12 mg/l |
| 5 Feb 2026, 09:38 | 11 | 11 mg/l |
| 12 Jan 2026, 11:52 | 10.9 | 10.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.25 mg/l
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 0.25 | 0.25 mg/l |
| 6 Aug 2026, 13:37 | 0.2 | 0.2 mg/l |
| 6 Jul 2026, 09:28 | 0.22 | 0.22 mg/l |
| 3 Jun 2026, 08:17 | 0.2 | 0.2 mg/l |
| 20 May 2026, 14:17 | 0.14 | 0.14 mg/l |
| 23 Apr 2026, 12:41 | 0.11 | 0.11 mg/l |
| 24 Mar 2026, 14:21 | 0.094 | 0.094 mg/l |
| 5 Feb 2026, 09:38 | 0.099 | 0.099 mg/l |
| 12 Jan 2026, 11:52 | 0.14 | 0.14 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
983 µS/cm
Sampled 3 Sep 2026, 51 days ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:13 | 983 | 983 µS/cm |
| 6 Aug 2026, 13:37 | 1041 | 1041 µS/cm |
| 6 Jul 2026, 09:28 | 913 | 913 µS/cm |
| 3 Jun 2026, 08:17 | 903 | 903 µS/cm |
| 20 May 2026, 14:17 | 908 | 908 µS/cm |
| 23 Apr 2026, 12:41 | 878 | 878 µS/cm |
| 24 Mar 2026, 14:21 | 833 | 833 µS/cm |
| 5 Feb 2026, 09:38 | 718 | 718 µS/cm |
| 12 Jan 2026, 11:52 | 788 | 788 µS/cm |
Everything measured here
28 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 28 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 9 | Jan 2026 – Sep 2026 | 67.5% 3 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 9 | Jan 2026 – Sep 2026 | 6.23 mg/l 3 Sep 2026 |
| Temperature of Water 0076 | River water | 9 | Jan 2026 – Sep 2026 | 19.1 °C 3 Sep 2026 |
| pH 0061 | River water | 9 | Jan 2026 – Sep 2026 | 7.61 3 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 9 | Jan 2026 – Sep 2026 | 0.055 mg/l 3 Sep 2026 |
| Nitrate as N 0117 | River water | 9 | Jan 2026 – Sep 2026 | 9.43 mg/l 3 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 9 | Jan 2026 – Sep 2026 | 0.25 mg/l 3 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 9 | Jan 2026 – Sep 2026 | 983 µS/cm 3 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 9 | Jan 2026 – Sep 2026 | 180 mg/l 3 Sep 2026 |
| Alkalinity, Dissolved as CaCO3 7867 | River water | 6 | Apr 2026 – Sep 2026 | 180 mg/l 3 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 9 | Jan 2026 – Sep 2026 | 0.00081 mg/l 3 Sep 2026 |
| Ammoniacal Nitrogen, Filtered as N 9993 | River water | 6 | Apr 2026 – Sep 2026 | 0.049 mg/l 3 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 9 | Jan 2026 – Sep 2026 | 6.5 mg/l 3 Sep 2026 |
| Chloride 0172 | River water | 9 | Jan 2026 – Sep 2026 | 100 mg/l 3 Sep 2026 |
| Chloride, GF/C Filtered 7190 | River water | 6 | Apr 2026 – Sep 2026 | 100 mg/l 3 Sep 2026 |
| Flow Type 2896 | River water | 7 | Jan 2026 – Aug 2026 | Moderate Flow 6 Aug 2026 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 3 | Feb 2026 – Aug 2026 | 1 text result 6 Aug 2026 |
| LCMS Screen : Semi Quantitative 7299 | River water | 1 | Aug 2026 – Aug 2026 | 1 text result 6 Aug 2026 |
| Nitrite as N 0118 | River water | 9 | Jan 2026 – Sep 2026 | 0.066 mg/l 3 Sep 2026 |
| Nitrite, Filtered as N 6485 | River water | 6 | Apr 2026 – Sep 2026 | 0.065 mg/l 3 Sep 2026 |
| Nitrogen, Total as N 9686 | River water | 9 | Jan 2026 – Sep 2026 | 10 mg/l 3 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 9 | Jan 2026 – Sep 2026 | 9.5 mg/l 3 Sep 2026 |
| Nitrogen, Total Oxidised, Filtered as N 9943 | River water | 6 | Apr 2026 – Sep 2026 | 9.4 mg/l 3 Sep 2026 |
| Orthophosphate, Filtered as P 9856 | River water | 6 | Apr 2026 – Sep 2026 | 0.23 mg/l 3 Sep 2026 |
| Phosphorus, Total as P 0348 | River water | 9 | Jan 2026 – Sep 2026 | 0.27 mg/l 3 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 9 | Jan 2026 – Sep 2026 | 7.4 mg/l 3 Sep 2026 |
| Silicate, Filtered as SiO2 9857 | River water | 6 | Apr 2026 – Sep 2026 | 7.3 mg/l 3 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 9 | Jan 2026 – Sep 2026 | below 3 mg/l 3 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.