Alconbury Brook Footbridge upstream of Alconbury Ford
EA name: ALCONBURY BK. FT.BR. U/S ALCONBURY FORD
Environment Agency sampling point AN-23M09 · 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, 09:5828 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 36 since 3 Oct 2023 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 518741, 275610As published, to the nearest 1 m. Open in a map
- River, by its own name
- Alconbury Brook Ft Br
- River, by the map
- Alconbury BrookPlaced on a river whose name partly matches its own, 0 m from the line.
- Next gauge downstream
- BRAMPTON RACECOURSE GS 6.9 km along the riverBrampton Racecourse On the Alconbury Brook · 6.9 km along the river
- Nearest gauge upstream
- Alconbury Weston On the Alconbury Brook · 1.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (30 samples)
Environmental monitoring statutory (EU directives) (6 samples)
2 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
49.1%
Sampled 3 Sep 2026, 28 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | 49.1 | 49.1% |
| 2 Jun 2026, 14:46 | 94 | 94% |
| 20 May 2026, 09:44 | 76.7 | 76.7% |
| 1 Apr 2026, 10:11 | 93.9 | 93.9% |
| 3 Mar 2026, 11:35 | 96 | 96% |
| 4 Feb 2026, 10:25 | 90.9 | 90.9% |
| 14 Jan 2026, 09:58 | 85.7 | 85.7% |
| 1 Dec 2025, 14:19 | 87.6 | 87.6% |
| 7 Nov 2025, 11:01 | 31.2 | 31.2% |
| 8 Oct 2025, 10:21 | 51 | 51% |
| 8 Sep 2025, 13:51 | 74.9 | 74.9% |
| 13 Aug 2025, 12:03 | 44.8 | 44.8% |
| 7 Jul 2025, 16:59 | 71.9 | 71.9% |
| 5 Jun 2025, 09:33 | 78.5 | 78.5% |
| 4 Mar 2024, 15:38 | 99.4 | 99.4% |
| 1 Feb 2024, 09:23 | 91.4 | 91.4% |
| 2 Jan 2024, 13:12 | 92.1 | 92.1% |
| 5 Dec 2023, 12:51 | 89.4 | 89.4% |
| 1 Nov 2023, 14:55 | 85.8 | 85.8% |
| 3 Oct 2023, 11:50 | 52.5 | 52.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.68 mg/l
Sampled 3 Sep 2026, 28 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | 4.68 | 4.68 mg/l |
| 2 Jun 2026, 14:46 | 8.54 | 8.54 mg/l |
| 20 May 2026, 09:44 | 7.97 | 7.97 mg/l |
| 1 Apr 2026, 10:11 | 10.7 | 10.7 mg/l |
| 3 Mar 2026, 11:35 | 11.2 | 11.2 mg/l |
| 4 Feb 2026, 10:25 | 11.4 | 11.4 mg/l |
| 14 Jan 2026, 09:58 | 11.5 | 11.5 mg/l |
| 1 Dec 2025, 14:19 | 10.5 | 10.5 mg/l |
| 7 Nov 2025, 11:01 | 3.37 | 3.37 mg/l |
| 8 Oct 2025, 10:21 | 5.39 | 5.39 mg/l |
| 8 Sep 2025, 13:51 | 6.87 | 6.87 mg/l |
| 13 Aug 2025, 12:03 | 4.01 | 4.01 mg/l |
| 7 Jul 2025, 16:59 | 6.75 | 6.75 mg/l |
| 5 Jun 2025, 09:33 | 7.84 | 7.84 mg/l |
| 4 Mar 2024, 15:38 | 12.2 | 12.2 mg/l |
| 1 Feb 2024, 09:23 | 11.5 | 11.5 mg/l |
| 2 Jan 2024, 13:12 | 10.8 | 10.8 mg/l |
| 5 Dec 2023, 12:51 | 11 | 11 mg/l |
| 1 Nov 2023, 14:55 | 9.31 | 9.31 mg/l |
| 3 Oct 2023, 11:50 | 5.28 | 5.28 mg/l |
Water temperature
code 0076 · °C
17.5 °C
Sampled 3 Sep 2026, 28 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | 17.5 | 17.5 °C |
| 2 Jun 2026, 14:46 | 19.9 | 19.9 °C |
| 20 May 2026, 09:44 | 13.5 | 13.5 °C |
| 1 Apr 2026, 10:11 | 9.5 | 9.5 °C |
| 3 Mar 2026, 11:35 | 8.5 | 8.5 °C |
| 4 Feb 2026, 10:25 | 5.5 | 5.5 °C |
| 14 Jan 2026, 09:58 | 3 | 3 °C |
| 1 Dec 2025, 14:19 | 7.6 | 7.6 °C |
| 7 Nov 2025, 11:01 | 11.8 | 11.8 °C |
| 8 Oct 2025, 10:21 | 12.8 | 12.8 °C |
| 8 Sep 2025, 13:51 | 19.4 | 19.4 °C |
| 13 Aug 2025, 12:03 | 20.7 | 20.7 °C |
| 7 Jul 2025, 16:59 | 18.3 | 18.3 °C |
| 5 Jun 2025, 09:33 | 15.3 | 15.3 °C |
| 4 Mar 2024, 15:38 | 6.5 | 6.5 °C |
| 1 Feb 2024, 09:23 | 5.5 | 5.5 °C |
| 2 Jan 2024, 13:12 | 8.3 | 8.3 °C |
| 5 Dec 2023, 12:51 | 6.5 | 6.5 °C |
| 1 Nov 2023, 14:55 | 11.6 | 11.6 °C |
| 3 Oct 2023, 11:50 | 15 | 15 °C |
pH
code 0061
7.25
Sampled 3 Sep 2026, 28 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | 7.25 | 7.25 |
| 2 Jun 2026, 14:46 | 7.74 | 7.74 |
| 20 May 2026, 09:44 | 7.62 | 7.62 |
| 1 Apr 2026, 10:11 | 7.99 | 7.99 |
| 3 Mar 2026, 11:35 | 8.11 | 8.11 |
| 4 Feb 2026, 10:25 | 8.09 | 8.09 |
| 14 Jan 2026, 09:58 | 8.45 | 8.45 |
| 1 Dec 2025, 14:19 | 7.99 | 7.99 |
| 7 Nov 2025, 11:01 | 7.31 | 7.31 |
| 8 Oct 2025, 10:21 | 7.37 | 7.37 |
| 8 Sep 2025, 13:51 | 7.32 | 7.32 |
| 13 Aug 2025, 12:03 | 7.06 | 7.06 |
| 7 Jul 2025, 16:59 | 7.39 | 7.39 |
| 5 Jun 2025, 09:33 | 7.6 | 7.6 |
| 4 Mar 2024, 15:38 | 8.13 | 8.13 |
| 1 Feb 2024, 09:23 | 8.19 | 8.19 |
| 2 Jan 2024, 13:12 | 7.91 | 7.91 |
| 5 Dec 2023, 12:51 | 7.93 | 7.93 |
| 1 Nov 2023, 14:55 | 7.81 | 7.81 |
| 3 Oct 2023, 11:50 | 7.46 | 7.46 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 3 Sep 2026, 28 days ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jun 2026, 14:46 | 0.13 | 0.13 mg/l |
| 20 May 2026, 09:44 | 0.48 | 0.48 mg/l |
| 1 Apr 2026, 10:11 | 0.04 | 0.04 mg/l |
| 4 Mar 2024, 15:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Feb 2024, 09:23 | 0.047 | 0.047 mg/l |
| 2 Jan 2024, 13:12 | 0.031 | 0.031 mg/l |
| 5 Dec 2023, 12:51 | 0.039 | 0.039 mg/l |
| 1 Nov 2023, 14:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Oct 2023, 11:50 | 0.26 | 0.26 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
below 0.196 mg/l (not detected above this)
Sampled 3 Sep 2026, 28 days ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | <0.196 | below 0.196 mg/l (not detected above this) |
| 2 Jun 2026, 14:46 | 17.5 | 17.5 mg/l |
| 20 May 2026, 09:44 | 0.278 | 0.278 mg/l |
| 1 Apr 2026, 10:11 | 8.88 | 8.88 mg/l |
| 4 Mar 2024, 15:38 | 7.19 | 7.19 mg/l |
| 1 Feb 2024, 09:23 | 9.98 | 9.98 mg/l |
| 2 Jan 2024, 13:12 | 7.49 | 7.49 mg/l |
| 5 Dec 2023, 12:51 | 12 | 12 mg/l |
| 1 Nov 2023, 14:55 | 14 | 14 mg/l |
| 3 Oct 2023, 11:50 | 0.35 | 0.35 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.16 mg/l
Sampled 3 Sep 2026, 28 days ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | 0.16 | 0.16 mg/l |
| 2 Jun 2026, 14:46 | 0.036 | 0.036 mg/l |
| 20 May 2026, 09:44 | 0.061 | 0.061 mg/l |
| 1 Apr 2026, 10:11 | 0.034 | 0.034 mg/l |
| 4 Mar 2024, 15:38 | 0.054 | 0.054 mg/l |
| 1 Feb 2024, 09:23 | 0.065 | 0.065 mg/l |
| 2 Jan 2024, 13:12 | 0.084 | 0.084 mg/l |
| 5 Dec 2023, 12:51 | 0.069 | 0.069 mg/l |
| 1 Nov 2023, 14:55 | 0.066 | 0.066 mg/l |
| 3 Oct 2023, 11:50 | 0.16 | 0.16 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
812 µS/cm
Sampled 3 Sep 2026, 28 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 09:58 | 812 | 812 µS/cm |
| 2 Jun 2026, 14:46 | 753 | 753 µS/cm |
| 20 May 2026, 09:44 | 749 | 749 µS/cm |
| 1 Apr 2026, 10:11 | 763 | 763 µS/cm |
| 3 Mar 2026, 11:35 | 688 | 688 µS/cm |
| 4 Feb 2026, 10:25 | 700 | 700 µS/cm |
| 14 Jan 2026, 09:58 | 719 | 719 µS/cm |
| 1 Dec 2025, 14:19 | 759 | 759 µS/cm |
| 7 Nov 2025, 11:01 | 789 | 789 µS/cm |
| 8 Oct 2025, 10:21 | 802 | 802 µS/cm |
| 8 Sep 2025, 13:51 | 770 | 770 µS/cm |
| 13 Aug 2025, 12:03 | 766 | 766 µS/cm |
| 7 Jul 2025, 16:59 | 765 | 765 µS/cm |
| 5 Jun 2025, 09:33 | 891 | 891 µS/cm |
| 4 Mar 2024, 15:38 | 759 | 759 µS/cm |
| 1 Feb 2024, 09:23 | 868 | 868 µS/cm |
| 2 Jan 2024, 13:12 | 490 | 490 µS/cm |
| 5 Dec 2023, 12:51 | 617 | 617 µS/cm |
| 1 Nov 2023, 14:55 | 711 | 711 µS/cm |
| 3 Oct 2023, 11:50 | 739 | 739 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 20 | Oct 2023 – Sep 2026 | 49.1% 3 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Oct 2023 – Sep 2026 | 4.68 mg/l 3 Sep 2026 |
| Temperature of Water 0076 | River water | 20 | Oct 2023 – Sep 2026 | 17.5 °C 3 Sep 2026 |
| pH 0061 | River water | 20 | Oct 2023 – Sep 2026 | 7.25 3 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 10 | Oct 2023 – Sep 2026 | below 0.03 mg/l 3 Sep 2026 |
| Nitrate as N 0117 | River water | 10 | Oct 2023 – Sep 2026 | below 0.196 mg/l 3 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 10 | Oct 2023 – Sep 2026 | 0.16 mg/l 3 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 20 | Oct 2023 – Sep 2026 | 812 µS/cm 3 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 10 | Oct 2023 – Sep 2026 | 180 mg/l 3 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 10 | Oct 2023 – Sep 2026 | below 0.00017 mg/l 3 Sep 2026 |
| Iron, Dissolved 6460 | River water | 34 | Oct 2023 – Sep 2026 | 510 µg/l 3 Sep 2026 |
| Nitrite as N 0118 | River water | 10 | Oct 2023 – Sep 2026 | below 0.004 mg/l 3 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 10 | Oct 2023 – Sep 2026 | below 0.2 mg/l 3 Sep 2026 |
| No flow /No sample 7668 | River water | 2 | Jul 2026 – Aug 2026 | No flow/discharge at sampling point 11 Aug 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.