Hilden Bridge Hilden Brook
EA name: HILDEN BRIDGE HILDEN BROOK
Environment Agency sampling point SO-E0000784 · 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
- 13 Mar 2026, 09:267 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
- 12 since 2 Apr 2025 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 558506, 147355As published, to the nearest 1 m. Open in a map
- River, by its own name
- Hilden
- River, by the map
- Hilden BrookPlaced on a river whose name partly matches its own, 3 m from the line.
- Next gauge downstream
- Town Lock On the River Medway · 1.5 km along the river
- Why it was sampled
- Monitoring (national agency policy) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
94.6%
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 94.6 | 94.6% |
| 6 Feb 2026, 11:37 | 97.5 | 97.5% |
| 6 Jan 2026, 14:57 | 96.3 | 96.3% |
| 1 Dec 2025, 13:28 | 86.3 | 86.3% |
| 12 Nov 2025, 10:31 | 80.6 | 80.6% |
| 3 Oct 2025, 14:25 | 73.7 | 73.7% |
| 19 Sep 2025, 15:19 | 72.2 | 72.2% |
| 12 Aug 2025, 13:51 | 61.7 | 61.7% |
| 4 Jul 2025, 07:44 | 57.5 | 57.5% |
| 4 Jun 2025, 13:57 | 72.9 | 72.9% |
| 9 May 2025, 13:11 | 80.7 | 80.7% |
| 2 Apr 2025, 08:32 | 84.3 | 84.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11 mg/l
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 11 | 11 mg/l |
| 6 Feb 2026, 11:37 | 11.5 | 11.5 mg/l |
| 6 Jan 2026, 14:57 | 13.7 | 13.7 mg/l |
| 1 Dec 2025, 13:28 | 10.1 | 10.1 mg/l |
| 12 Nov 2025, 10:31 | 8.67 | 8.67 mg/l |
| 3 Oct 2025, 14:25 | 7.61 | 7.61 mg/l |
| 19 Sep 2025, 15:19 | 7 | 7 mg/l |
| 12 Aug 2025, 13:51 | 5.71 | 5.71 mg/l |
| 4 Jul 2025, 07:44 | 5.81 | 5.81 mg/l |
| 4 Jun 2025, 13:57 | 7.58 | 7.58 mg/l |
| 9 May 2025, 13:11 | 8.76 | 8.76 mg/l |
| 2 Apr 2025, 08:32 | 9.99 | 9.99 mg/l |
Water temperature
code 0076 · °C
8.8 °C
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 8.8 | 8.8 °C |
| 6 Feb 2026, 11:37 | 8.1 | 8.1 °C |
| 6 Jan 2026, 14:57 | 0.9 | 0.9 °C |
| 1 Dec 2025, 13:28 | 8.5 | 8.5 °C |
| 12 Nov 2025, 10:31 | 12 | 12 °C |
| 3 Oct 2025, 14:25 | 13.8 | 13.8 °C |
| 19 Sep 2025, 15:19 | 16.7 | 16.7 °C |
| 12 Aug 2025, 13:51 | 19 | 19 °C |
| 4 Jul 2025, 07:44 | 14.8 | 14.8 °C |
| 4 Jun 2025, 13:57 | 13.5 | 13.5 °C |
| 9 May 2025, 13:11 | 11.6 | 11.6 °C |
| 2 Apr 2025, 08:32 | 7.9 | 7.9 °C |
pH
code 0061
7.73
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 7.73 | 7.73 |
| 6 Feb 2026, 11:37 | 7.61 | 7.61 |
| 6 Jan 2026, 14:57 | 8.05 | 8.05 |
| 1 Dec 2025, 13:28 | 7.62 | 7.62 |
| 12 Nov 2025, 10:31 | 7.71 | 7.71 |
| 3 Oct 2025, 14:25 | 7.9 | 7.9 |
| 19 Sep 2025, 15:19 | 7.9 | 7.9 |
| 12 Aug 2025, 13:51 | 7.79 | 7.79 |
| 4 Jul 2025, 07:44 | 7.75 | 7.75 |
| 4 Jun 2025, 13:57 | 7.87 | 7.87 |
| 9 May 2025, 13:11 | 7.86 | 7.86 |
| 2 Apr 2025, 08:32 | 7.78 | 7.78 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.035 mg/l
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 0.035 | 0.035 mg/l |
| 6 Feb 2026, 11:37 | 0.054 | 0.054 mg/l |
| 6 Jan 2026, 14:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Dec 2025, 13:28 | 0.082 | 0.082 mg/l |
| 12 Nov 2025, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Oct 2025, 14:25 | 0.082 | 0.082 mg/l |
| 19 Sep 2025, 15:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2025, 13:51 | 0.074 | 0.074 mg/l |
| 4 Jul 2025, 07:44 | 0.085 | 0.085 mg/l |
| 4 Jun 2025, 13:57 | 0.095 | 0.095 mg/l |
| 9 May 2025, 13:11 | 0.099 | 0.099 mg/l |
| 2 Apr 2025, 08:32 | 0.032 | 0.032 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.756 mg/l
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 0.756 | 0.756 mg/l |
| 6 Feb 2026, 11:37 | 0.995 | 0.995 mg/l |
| 6 Jan 2026, 14:57 | 1.7 | 1.7 mg/l |
| 1 Dec 2025, 13:28 | 1.29 | 1.29 mg/l |
| 12 Nov 2025, 10:31 | 1.2 | 1.2 mg/l |
| 3 Oct 2025, 14:25 | 0.949 | 0.949 mg/l |
| 19 Sep 2025, 15:19 | 0.734 | 0.734 mg/l |
| 12 Aug 2025, 13:51 | 0.978 | 0.978 mg/l |
| 4 Jul 2025, 07:44 | 1.07 | 1.07 mg/l |
| 4 Jun 2025, 13:57 | 2.44 | 2.44 mg/l |
| 9 May 2025, 13:11 | 1.07 | 1.07 mg/l |
| 2 Apr 2025, 08:32 | 0.632 | 0.632 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.1 mg/l
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 0.1 | 0.1 mg/l |
| 6 Feb 2026, 11:37 | 0.094 | 0.094 mg/l |
| 6 Jan 2026, 14:57 | 0.13 | 0.13 mg/l |
| 1 Dec 2025, 13:28 | 0.13 | 0.13 mg/l |
| 12 Nov 2025, 10:31 | 0.14 | 0.14 mg/l |
| 3 Oct 2025, 14:25 | 0.26 | 0.26 mg/l |
| 19 Sep 2025, 15:19 | 0.25 | 0.25 mg/l |
| 12 Aug 2025, 13:51 | 0.28 | 0.28 mg/l |
| 4 Jul 2025, 07:44 | 0.38 | 0.38 mg/l |
| 4 Jun 2025, 13:57 | 0.43 | 0.43 mg/l |
| 9 May 2025, 13:11 | 0.16 | 0.16 mg/l |
| 2 Apr 2025, 08:32 | 0.035 | 0.035 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
390 µS/cm
Sampled 13 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Mar 2026, 09:26 | 390 | 390 µS/cm |
| 6 Feb 2026, 11:37 | 254 | 254 µS/cm |
| 6 Jan 2026, 14:57 | 724 | 724 µS/cm |
| 1 Dec 2025, 13:28 | 590 | 590 µS/cm |
| 12 Nov 2025, 10:31 | 514 | 514 µS/cm |
| 3 Oct 2025, 14:25 | 542 | 542 µS/cm |
| 19 Sep 2025, 15:19 | 576 | 576 µS/cm |
| 12 Aug 2025, 13:51 | 653 | 653 µS/cm |
| 4 Jul 2025, 07:44 | 680 | 680 µS/cm |
| 4 Jun 2025, 13:57 | 624 | 624 µS/cm |
| 9 May 2025, 13:11 | 731 | 731 µS/cm |
| 2 Apr 2025, 08:32 | 638 | 638 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 12 | Apr 2025 – Mar 2026 | 94.6% 13 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 12 | Apr 2025 – Mar 2026 | 11 mg/l 13 Mar 2026 |
| Temperature of Water 0076 | River water | 12 | Apr 2025 – Mar 2026 | 8.8 °C 13 Mar 2026 |
| pH 0061 | River water | 12 | Apr 2025 – Mar 2026 | 7.73 13 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Apr 2025 – Mar 2026 | 0.035 mg/l 13 Mar 2026 |
| Nitrate as N 0117 | River water | 12 | Apr 2025 – Mar 2026 | 0.756 mg/l 13 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 12 | Apr 2025 – Mar 2026 | 0.1 mg/l 13 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 12 | Apr 2025 – Mar 2026 | 390 µS/cm 13 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 12 | Apr 2025 – Mar 2026 | 120 mg/l 13 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 12 | Apr 2025 – Mar 2026 | 0.00032 mg/l 13 Mar 2026 |
| Nitrite as N 0118 | River water | 12 | Apr 2025 – Mar 2026 | 0.004 mg/l 13 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 12 | Apr 2025 – Mar 2026 | 0.76 mg/l 13 Mar 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.