Alconbury Brook Road Bridge Hamerton
EA name: ALCONBURY BK.RD.BR.HAMERTON
Environment Agency sampling point AN-23M02 · 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
- 16 Sep 2026, 12:1622 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 6 since 1 Apr 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) · results completed 18 Sep 2026
- Where
- National Grid 513479, 279746As published, to the nearest 1 m. Open in a map
- River, by its own name
- Alconbury Brook
- River, by the map
- Alconbury BrookPlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- Alconbury Weston On the Alconbury Brook · 7.7 km along the river
- Why it was sampled
- Monitoring (national agency policy) (6 samples)
Results here were completed a median of 2 days after the sample was taken (2 to 4 days, 6 samples). 1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
16.3%
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | 16.3 | 16.3% |
| 7 Jul 2026, 12:22 | 68.5 | 68.5% |
| 5 Jun 2026, 15:31 | 146.9 | 146.9% |
| 18 May 2026, 12:03 | 103.5 | 103.5% |
| 1 Apr 2026, 10:47 | 102.1 | 102.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
1.6 mg/l
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | 1.6 | 1.6 mg/l |
| 7 Jul 2026, 12:22 | 6.13 | 6.13 mg/l |
| 5 Jun 2026, 15:31 | 14.2 | 14.2 mg/l |
| 18 May 2026, 12:03 | 11.1 | 11.1 mg/l |
| 1 Apr 2026, 10:47 | 11.4 | 11.4 mg/l |
Water temperature
code 0076 · °C
16 °C
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | 16 | 16 °C |
| 7 Jul 2026, 12:22 | 20.7 | 20.7 °C |
| 5 Jun 2026, 15:31 | 16.7 | 16.7 °C |
| 18 May 2026, 12:03 | 12.3 | 12.3 °C |
| 1 Apr 2026, 10:47 | 10.2 | 10.2 °C |
pH
code 0061
7.46
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | 7.46 | 7.46 |
| 7 Jul 2026, 12:22 | 7.84 | 7.84 |
| 5 Jun 2026, 15:31 | 8.27 | 8.27 |
| 18 May 2026, 12:03 | 7.7 | 7.7 |
| 1 Apr 2026, 10:47 | 8.19 | 8.19 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.059 mg/l
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | 0.059 | 0.059 mg/l |
| 7 Jul 2026, 12:22 | 0.19 | 0.19 mg/l |
| 5 Jun 2026, 15:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 May 2026, 12:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2026, 10:47 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
below 0.196 mg/l (not detected above this)
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | <0.196 | below 0.196 mg/l (not detected above this) |
| 7 Jul 2026, 12:22 | 0.197 | 0.197 mg/l |
| 5 Jun 2026, 15:31 | 18.9 | 18.9 mg/l |
| 18 May 2026, 12:03 | <0.196 | below 0.196 mg/l (not detected above this) |
| 1 Apr 2026, 10:47 | 11 | 11 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.16 mg/l
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | 0.16 | 0.16 mg/l |
| 7 Jul 2026, 12:22 | 0.12 | 0.12 mg/l |
| 5 Jun 2026, 15:31 | 0.037 | 0.037 mg/l |
| 18 May 2026, 12:03 | <0.01 | below 0.01 mg/l (not detected above this) |
| 1 Apr 2026, 10:47 | 0.013 | 0.013 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1118 µS/cm
Sampled 16 Sep 2026, 22 days ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Sep 2026, 12:16 | 1118 | 1118 µS/cm |
| 7 Jul 2026, 12:22 | 661 | 661 µS/cm |
| 5 Jun 2026, 15:31 | 766 | 766 µS/cm |
| 18 May 2026, 12:03 | 692 | 692 µS/cm |
| 1 Apr 2026, 10:47 | 763 | 763 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 5 | Apr 2026 – Sep 2026 | 16.3% 16 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 5 | Apr 2026 – Sep 2026 | 1.6 mg/l 16 Sep 2026 |
| Temperature of Water 0076 | River water | 5 | Apr 2026 – Sep 2026 | 16 °C 16 Sep 2026 |
| pH 0061 | River water | 5 | Apr 2026 – Sep 2026 | 7.46 16 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 5 | Apr 2026 – Sep 2026 | 0.059 mg/l 16 Sep 2026 |
| Nitrate as N 0117 | River water | 5 | Apr 2026 – Sep 2026 | below 0.196 mg/l 16 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 5 | Apr 2026 – Sep 2026 | 0.16 mg/l 16 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 5 | Apr 2026 – Sep 2026 | 1118 µS/cm 16 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 5 | Apr 2026 – Sep 2026 | 290 mg/l 16 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 5 | Apr 2026 – Sep 2026 | 0.00049 mg/l 16 Sep 2026 |
| Nitrite as N 0118 | River water | 5 | Apr 2026 – Sep 2026 | below 0.004 mg/l 16 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 5 | Apr 2026 – Sep 2026 | below 0.2 mg/l 16 Sep 2026 |
| No flow /No sample 7668 | River water | 1 | Aug 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.