A600 Harrowden Road Bridge
EA name: A600 HARROWDEN ROAD BRIDGE (also listed as “RSN0386 A600 HARROWDEN ROAD BRIDGE”)
Environment Agency sampling point AN-RSN0386 · 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 Dec 2025, 10:5110 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 30 Sep 2026 and had nothing newer.
- Samples banked
- 23 since 8 Jan 2024 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 507398, 247555As 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
- An unnamed streamPlaced by position alone (the only river line close by), 8 m from the line.
- Next gauge downstream
- Roxton On the River Great Ouse · 12 km along the river
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89.6%
Sampled 2 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 89.6 | 89.6% |
| 6 Nov 2025, 10:45 | 83 | 83% |
| 1 Sep 2025, 10:45 | 85.8 | 85.8% |
| 15 Aug 2025, 15:02 | 117.5 | 117.5% |
| 7 Jul 2025, 10:19 | 68.2 | 68.2% |
| 9 Jun 2025, 15:27 | 175.8 | 175.8% |
| 1 May 2025, 12:53 | 127.5 | 127.5% |
| 3 Apr 2025, 11:29 | 134.6 | 134.6% |
| 3 Mar 2025, 11:19 | 106.2 | 106.2% |
| 7 Feb 2025, 13:40 | 101.1 | 101.1% |
| 13 Jan 2025, 14:55 | 97.5 | 97.5% |
| 4 Dec 2024, 16:11 | 94.9 | 94.9% |
| 6 Nov 2024, 11:50 | 97.9 | 97.9% |
| 11 Oct 2024, 13:37 | 89.1 | 89.1% |
| 2 Sep 2024, 15:52 | 117.4 | 117.4% |
| 2 Aug 2024, 13:28 | 171.4 | 171.4% |
| 1 Jul 2024, 10:43 | 101.5 | 101.5% |
| 3 Jun 2024, 14:40 | 124.2 | 124.2% |
| 2 May 2024, 10:24 | 107.1 | 107.1% |
| 2 Apr 2024, 10:03 | 107.5 | 107.5% |
| 11 Mar 2024, 10:51 | 96.3 | 96.3% |
| 5 Feb 2024, 11:36 | 104.8 | 104.8% |
| 8 Jan 2024, 11:38 | 91.5 | 91.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.5 mg/l
Sampled 2 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 10.5 | 10.5 mg/l |
| 6 Nov 2025, 10:45 | 8.78 | 8.78 mg/l |
| 1 Sep 2025, 10:45 | 8.46 | 8.46 mg/l |
| 15 Aug 2025, 15:02 | 10.3 | 10.3 mg/l |
| 7 Jul 2025, 10:19 | 6.54 | 6.54 mg/l |
| 9 Jun 2025, 15:27 | 16.8 | 16.8 mg/l |
| 1 May 2025, 12:53 | 11.9 | 11.9 mg/l |
| 3 Apr 2025, 11:29 | 15.2 | 15.2 mg/l |
| 3 Mar 2025, 11:19 | 13.2 | 13.2 mg/l |
| 7 Feb 2025, 13:40 | 13.1 | 13.1 mg/l |
| 13 Jan 2025, 14:55 | 12.4 | 12.4 mg/l |
| 4 Dec 2024, 16:11 | 11.2 | 11.2 mg/l |
| 6 Nov 2024, 11:50 | 10.6 | 10.6 mg/l |
| 11 Oct 2024, 13:37 | 9.45 | 9.45 mg/l |
| 2 Sep 2024, 15:52 | 10.7 | 10.7 mg/l |
| 2 Aug 2024, 13:28 | 15 | 15 mg/l |
| 1 Jul 2024, 10:43 | 9.92 | 9.92 mg/l |
| 3 Jun 2024, 14:40 | 11.9 | 11.9 mg/l |
| 2 May 2024, 10:24 | 11.5 | 11.5 mg/l |
| 2 Apr 2024, 10:03 | 12.2 | 12.2 mg/l |
| 11 Mar 2024, 10:51 | 11.5 | 11.5 mg/l |
| 5 Feb 2024, 11:36 | 12.5 | 12.5 mg/l |
| 8 Jan 2024, 11:38 | 11.3 | 11.3 mg/l |
Water temperature
code 0076 · °C
8.3 °C
Sampled 2 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 8.3 | 8.3 °C |
| 6 Nov 2025, 10:45 | 12.7 | 12.7 °C |
| 1 Sep 2025, 10:45 | 15.9 | 15.9 °C |
| 15 Aug 2025, 15:02 | 21.5 | 21.5 °C |
| 7 Jul 2025, 10:19 | 17.2 | 17.2 °C |
| 9 Jun 2025, 15:27 | 17.4 | 17.4 °C |
| 1 May 2025, 12:53 | 18.5 | 18.5 °C |
| 3 Apr 2025, 11:29 | 9.9 | 9.9 °C |
| 3 Mar 2025, 11:19 | 5.9 | 5.9 °C |
| 7 Feb 2025, 13:40 | 4.4 | 4.4 °C |
| 13 Jan 2025, 14:55 | 5.1 | 5.1 °C |
| 4 Dec 2024, 16:11 | 8.1 | 8.1 °C |
| 6 Nov 2024, 11:50 | 11.8 | 11.8 °C |
| 11 Oct 2024, 13:37 | 12.6 | 12.6 °C |
| 2 Sep 2024, 15:52 | 19.8 | 19.8 °C |
| 2 Aug 2024, 13:28 | 21.7 | 21.7 °C |
| 1 Jul 2024, 10:43 | 16.3 | 16.3 °C |
| 3 Jun 2024, 14:40 | 17.4 | 17.4 °C |
| 2 May 2024, 10:24 | 12 | 12 °C |
| 2 Apr 2024, 10:03 | 9.8 | 9.8 °C |
| 11 Mar 2024, 10:51 | 7.5 | 7.5 °C |
| 5 Feb 2024, 11:36 | 7.5 | 7.5 °C |
| 8 Jan 2024, 11:38 | 6.1 | 6.1 °C |
pH
code 0061
8.08
Sampled 2 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 8.08 | 8.08 |
| 6 Nov 2025, 10:45 | 7.95 | 7.95 |
| 1 Sep 2025, 10:45 | 8.11 | 8.11 |
| 15 Aug 2025, 15:02 | 8.15 | 8.15 |
| 7 Jul 2025, 10:19 | 8 | 8 |
| 9 Jun 2025, 15:27 | 8.9 | 8.9 |
| 1 May 2025, 12:53 | 8.3 | 8.3 |
| 3 Apr 2025, 11:29 | 8.51 | 8.51 |
| 3 Mar 2025, 11:19 | 8.29 | 8.29 |
| 7 Feb 2025, 13:40 | 8.25 | 8.25 |
| 13 Jan 2025, 14:55 | 8.11 | 8.11 |
| 4 Dec 2024, 16:11 | 8.16 | 8.16 |
| 6 Nov 2024, 11:50 | 8.12 | 8.12 |
| 11 Oct 2024, 13:37 | 7.93 | 7.93 |
| 2 Sep 2024, 15:52 | 8.34 | 8.34 |
| 2 Aug 2024, 13:28 | 8.82 | 8.82 |
| 1 Jul 2024, 10:43 | 8.13 | 8.13 |
| 3 Jun 2024, 14:40 | 8.57 | 8.57 |
| 2 May 2024, 10:24 | 8.43 | 8.43 |
| 2 Apr 2024, 10:03 | 8.25 | 8.25 |
| 11 Mar 2024, 10:51 | 8.13 | 8.13 |
| 5 Feb 2024, 11:36 | 8.26 | 8.26 |
| 8 Jan 2024, 11:38 | 8.11 | 8.11 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.051 mg/l
Sampled 2 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 0.051 | 0.051 mg/l |
| 6 Nov 2025, 10:45 | 0.013 | 0.013 mg/l |
| 1 Sep 2025, 10:45 | 0.021 | 0.021 mg/l |
| 15 Aug 2025, 15:02 | 0.0051 | 0.0051 mg/l |
| 7 Jul 2025, 10:19 | 0.23 | 0.23 mg/l |
| 9 Jun 2025, 15:27 | 0.022 | 0.022 mg/l |
| 1 May 2025, 12:53 | 0.035 | 0.035 mg/l |
| 3 Apr 2025, 11:29 | 0.0081 | 0.0081 mg/l |
| 3 Mar 2025, 11:19 | 0.023 | 0.023 mg/l |
| 7 Feb 2025, 13:40 | 0.04 | 0.04 mg/l |
| 13 Jan 2025, 14:55 | 0.051 | 0.051 mg/l |
| 4 Dec 2024, 16:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Nov 2024, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Oct 2024, 13:37 | 0.055 | 0.055 mg/l |
| 2 Sep 2024, 15:52 | 0.043 | 0.043 mg/l |
| 2 Aug 2024, 13:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2024, 10:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2024, 14:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 May 2024, 10:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Apr 2024, 10:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2024, 10:51 | 0.093 | 0.093 mg/l |
| 5 Feb 2024, 11:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jan 2024, 11:38 | 0.035 | 0.035 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.35 mg/l
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 5.35 | 5.35 mg/l |
| 6 Nov 2025, 10:45 | 1.49 | 1.49 mg/l |
| 1 Sep 2025, 10:45 | 0.554 | 0.554 mg/l |
| 15 Aug 2025, 15:02 | 0.124 | 0.124 mg/l |
| 7 Jul 2025, 10:19 | 0.713 | 0.713 mg/l |
| 9 Jun 2025, 15:27 | 0.989 | 0.989 mg/l |
| 1 May 2025, 12:53 | 2.37 | 2.37 mg/l |
| 3 Apr 2025, 11:29 | 2.78 | 2.78 mg/l |
| 3 Mar 2025, 11:19 | 3.88 | 3.88 mg/l |
| 7 Feb 2025, 13:40 | 3.68 | 3.68 mg/l |
| 13 Jan 2025, 14:55 | 3.58 | 3.58 mg/l |
| 6 Nov 2024, 11:50 | 3.09 | 3.09 mg/l |
| 11 Oct 2024, 13:37 | 3.02 | 3.02 mg/l |
| 2 Sep 2024, 15:52 | 0.94 | 0.94 mg/l |
| 2 Aug 2024, 13:28 | 0.26 | 0.26 mg/l |
| 1 Jul 2024, 10:43 | 0.981 | 0.981 mg/l |
| 3 Jun 2024, 14:40 | 2.67 | 2.67 mg/l |
| 2 May 2024, 10:24 | 3.38 | 3.38 mg/l |
| 2 Apr 2024, 10:03 | 3.58 | 3.58 mg/l |
| 11 Mar 2024, 10:51 | 4.16 | 4.16 mg/l |
| 5 Feb 2024, 11:36 | 4.48 | 4.48 mg/l |
| 8 Jan 2024, 11:38 | 4.28 | 4.28 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.062 mg/l
Sampled 2 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 0.062 | 0.062 mg/l |
| 6 Nov 2025, 10:45 | 0.054 | 0.054 mg/l |
| 1 Sep 2025, 10:45 | 0.033 | 0.033 mg/l |
| 15 Aug 2025, 15:02 | 0.032 | 0.032 mg/l |
| 7 Jul 2025, 10:19 | 0.028 | 0.028 mg/l |
| 9 Jun 2025, 15:27 | 0.0045 | 0.0045 mg/l |
| 1 May 2025, 12:53 | 0.037 | 0.037 mg/l |
| 3 Apr 2025, 11:29 | 0.03 | 0.03 mg/l |
| 3 Mar 2025, 11:19 | 0.072 | 0.072 mg/l |
| 7 Feb 2025, 13:40 | 0.084 | 0.084 mg/l |
| 13 Jan 2025, 14:55 | 0.09 | 0.09 mg/l |
| 4 Dec 2024, 16:11 | 0.085 | 0.085 mg/l |
| 6 Nov 2024, 11:50 | 0.081 | 0.081 mg/l |
| 11 Oct 2024, 13:37 | 0.077 | 0.077 mg/l |
| 2 Sep 2024, 15:52 | 0.049 | 0.049 mg/l |
| 2 Aug 2024, 13:28 | 0.017 | 0.017 mg/l |
| 1 Jul 2024, 10:43 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Jun 2024, 14:40 | 0.05 | 0.05 mg/l |
| 2 May 2024, 10:24 | 0.052 | 0.052 mg/l |
| 2 Apr 2024, 10:03 | 0.056 | 0.056 mg/l |
| 11 Mar 2024, 10:51 | 0.063 | 0.063 mg/l |
| 5 Feb 2024, 11:36 | 0.09 | 0.09 mg/l |
| 8 Jan 2024, 11:38 | 0.082 | 0.082 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1006 µS/cm
Sampled 2 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:51 | 1006 | 1006 µS/cm |
| 6 Nov 2025, 10:45 | 880 | 880 µS/cm |
| 1 Sep 2025, 10:45 | 914 | 914 µS/cm |
| 15 Aug 2025, 15:02 | 1222 | 1222 µS/cm |
| 7 Jul 2025, 10:19 | 674 | 674 µS/cm |
| 9 Jun 2025, 15:27 | 897 | 897 µS/cm |
| 1 May 2025, 12:53 | 1152 | 1152 µS/cm |
| 3 Apr 2025, 11:29 | 1054 | 1054 µS/cm |
| 3 Mar 2025, 11:19 | 906 | 906 µS/cm |
| 7 Feb 2025, 13:40 | 926 | 926 µS/cm |
| 13 Jan 2025, 14:55 | 888 | 888 µS/cm |
| 4 Dec 2024, 16:11 | 851 | 851 µS/cm |
| 6 Nov 2024, 11:50 | 902 | 902 µS/cm |
| 11 Oct 2024, 13:37 | 805 | 805 µS/cm |
| 2 Sep 2024, 15:52 | 847 | 847 µS/cm |
| 2 Aug 2024, 13:28 | 929 | 929 µS/cm |
| 1 Jul 2024, 10:43 | 1169 | 1169 µS/cm |
| 3 Jun 2024, 14:40 | 948 | 948 µS/cm |
| 2 May 2024, 10:24 | 932 | 932 µS/cm |
| 2 Apr 2024, 10:03 | 911 | 911 µS/cm |
| 11 Mar 2024, 10:51 | 876 | 876 µS/cm |
| 5 Feb 2024, 11:36 | 1003 | 1003 µS/cm |
| 8 Jan 2024, 11:38 | 884 | 884 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 | 23 | Jan 2024 – Dec 2025 | 89.6% 2 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Jan 2024 – Dec 2025 | 10.5 mg/l 2 Dec 2025 |
| Temperature of Water 0076 | River water | 23 | Jan 2024 – Dec 2025 | 8.3 °C 2 Dec 2025 |
| pH 0061 | River water | 23 | Jan 2024 – Dec 2025 | 8.08 2 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jan 2024 – Dec 2025 | 0.051 mg/l 2 Dec 2025 |
| Nitrate as N 0117 | River water | 22 | Jan 2024 – Dec 2025 | 5.35 mg/l 2 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Jan 2024 – Dec 2025 | 0.062 mg/l 2 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 23 | Jan 2024 – Dec 2025 | 1006 µS/cm 2 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jan 2024 – Dec 2025 | 140 mg/l 2 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jan 2024 – Dec 2025 | 0.00082 mg/l 2 Dec 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 23 | Jan 2024 – Dec 2025 | 6.6 mg/l 2 Dec 2025 |
| Chloride 0172 | River water | 23 | Jan 2024 – Dec 2025 | 66 mg/l 2 Dec 2025 |
| Flow Type 2896 | River water | 17 | Jul 2024 – Dec 2025 | Moderate Flow 2 Dec 2025 |
| Nitrite as N 0118 | River water | 23 | Jan 2024 – Dec 2025 | 0.051 mg/l 2 Dec 2025 |
| Nitrogen, Total as N 9686 | River water | 23 | Jan 2024 – Dec 2025 | 6.4 mg/l 2 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jan 2024 – Dec 2025 | 5.4 mg/l 2 Dec 2025 |
| Phosphorus, Total as P 0348 | River water | 23 | Jan 2024 – Dec 2025 | 0.076 mg/l 2 Dec 2025 |
| Silica, reactive as SiO2 0182 | River water | 23 | Jan 2024 – Dec 2025 | 4.8 mg/l 2 Dec 2025 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Dec 2025 – Dec 2025 | 6.1 mg/l 2 Dec 2025 |
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.