Whitewater above Blackwater
EA name: WHITEWATER ABOVE BLACKWATER
Environment Agency sampling point TH-PLDR0045 · 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
- 1 Sep 2026, 10:3830 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 21 since 21 Jun 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 474100, 163390As published, to the nearest 10 m. Open in a map
- River, by its own name
- Whitewater
- River, by the map
- River WhitewaterPlaced on the river its name gives, 10 m from the line.
- Next gauge downstream
- Swallowfield On the River Blackwater · 2.0 km along the riverSwallowfield Side Channel On the River Blackwater · 2.0 km along the river
- Nearest gauge upstream
- River Whitewater at Holdshot Farm 4.3 km along the riverBramshill On the River Hart · 6.1 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (21 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
82.1%
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | 82.1 | 82.1% |
| 14 Jul 2026, 15:48 | 85.6 | 85.6% |
| 26 Jun 2026, 10:11 | 75.8 | 75.8% |
| 14 May 2026, 09:27 | 85.6 | 85.6% |
| 13 Apr 2026, 09:59 | 88.8 | 88.8% |
| 23 Mar 2026, 12:00 | 88.7 | 88.7% |
| 7 Jan 2026, 09:20 | 89.3 | 89.3% |
| 4 Dec 2025, 10:58 | 86.2 | 86.2% |
| 11 Nov 2025, 11:42 | 83 | 83% |
| 17 Oct 2025, 08:46 | 86.3 | 86.3% |
| 28 Apr 2025, 08:58 | 87.7 | 87.7% |
| 5 Mar 2025, 13:17 | 95.9 | 95.9% |
| 12 Feb 2025, 09:27 | 94.2 | 94.2% |
| 22 Jan 2025, 12:26 | 92.5 | 92.5% |
| 4 Dec 2024, 10:06 | 91.8 | 91.8% |
| 11 Nov 2024, 15:47 | 90.4 | 90.4% |
| 21 Oct 2024, 09:24 | 82.2 | 82.2% |
| 5 Sep 2024, 08:59 | 85.7 | 85.7% |
| 1 Aug 2024, 09:58 | 82.8 | 82.8% |
| 9 Jul 2024, 08:47 | 86.7 | 86.7% |
| 21 Jun 2024, 13:18 | 97 | 97% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.03 mg/l
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | 8.03 | 8.03 mg/l |
| 14 Jul 2026, 15:48 | 7.75 | 7.75 mg/l |
| 26 Jun 2026, 10:11 | 6.48 | 6.48 mg/l |
| 14 May 2026, 09:27 | 9.55 | 9.55 mg/l |
| 13 Apr 2026, 09:59 | 10.1 | 10.1 mg/l |
| 23 Mar 2026, 12:00 | 10.1 | 10.1 mg/l |
| 7 Jan 2026, 09:20 | 11.9 | 11.9 mg/l |
| 4 Dec 2025, 10:58 | 10.2 | 10.2 mg/l |
| 11 Nov 2025, 11:42 | 8.97 | 8.97 mg/l |
| 17 Oct 2025, 08:46 | 9.26 | 9.26 mg/l |
| 28 Apr 2025, 08:58 | 9.41 | 9.41 mg/l |
| 5 Mar 2025, 13:17 | 11.7 | 11.7 mg/l |
| 12 Feb 2025, 09:27 | 11.7 | 11.7 mg/l |
| 22 Jan 2025, 12:26 | 11.4 | 11.4 mg/l |
| 4 Dec 2024, 10:06 | 11 | 11 mg/l |
| 11 Nov 2024, 15:47 | 9.99 | 9.99 mg/l |
| 21 Oct 2024, 09:24 | 8.78 | 8.78 mg/l |
| 5 Sep 2024, 08:59 | 8.62 | 8.62 mg/l |
| 1 Aug 2024, 09:58 | 7.74 | 7.74 mg/l |
| 9 Jul 2024, 08:47 | 8.7 | 8.7 mg/l |
| 21 Jun 2024, 13:18 | 9.61 | 9.61 mg/l |
Water temperature
code 0076 · °C
16.3 °C
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | 16.3 | 16.3 °C |
| 14 Jul 2026, 15:48 | 20.1 | 20.1 °C |
| 26 Jun 2026, 10:11 | 23.1 | 23.1 °C |
| 14 May 2026, 09:27 | 10.4 | 10.4 °C |
| 13 Apr 2026, 09:59 | 9.7 | 9.7 °C |
| 23 Mar 2026, 12:00 | 9.4 | 9.4 °C |
| 7 Jan 2026, 09:20 | 3.4 | 3.4 °C |
| 4 Dec 2025, 10:58 | 8 | 8 °C |
| 11 Nov 2025, 11:42 | 11.8 | 11.8 °C |
| 17 Oct 2025, 08:46 | 12.1 | 12.1 °C |
| 28 Apr 2025, 08:58 | 12.1 | 12.1 °C |
| 5 Mar 2025, 13:17 | 6.9 | 6.9 °C |
| 12 Feb 2025, 09:27 | 6.1 | 6.1 °C |
| 22 Jan 2025, 12:26 | 6.4 | 6.4 °C |
| 4 Dec 2024, 10:06 | 7.3 | 7.3 °C |
| 11 Nov 2024, 15:47 | 10.8 | 10.8 °C |
| 21 Oct 2024, 09:24 | 12.3 | 12.3 °C |
| 5 Sep 2024, 08:59 | 15 | 15 °C |
| 1 Aug 2024, 09:58 | 18.5 | 18.5 °C |
| 9 Jul 2024, 08:47 | 15.1 | 15.1 °C |
| 21 Jun 2024, 13:18 | 15.7 | 15.7 °C |
pH
code 0061
7.84
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | 7.84 | 7.84 |
| 14 Jul 2026, 15:48 | 7.95 | 7.95 |
| 26 Jun 2026, 10:11 | 7.75 | 7.75 |
| 14 May 2026, 09:27 | 7.76 | 7.76 |
| 13 Apr 2026, 09:59 | 7.73 | 7.73 |
| 23 Mar 2026, 12:00 | 7.86 | 7.86 |
| 7 Jan 2026, 09:20 | 7.78 | 7.78 |
| 4 Dec 2025, 10:58 | 7.93 | 7.93 |
| 11 Nov 2025, 11:42 | 7.62 | 7.62 |
| 17 Oct 2025, 08:46 | 7.69 | 7.69 |
| 28 Apr 2025, 08:58 | 7.86 | 7.86 |
| 5 Mar 2025, 13:17 | 7.99 | 7.99 |
| 12 Feb 2025, 09:27 | 7.83 | 7.83 |
| 22 Jan 2025, 12:26 | 7.9 | 7.9 |
| 4 Dec 2024, 10:06 | 7.82 | 7.82 |
| 11 Nov 2024, 15:47 | 7.94 | 7.94 |
| 21 Oct 2024, 09:24 | 7.68 | 7.68 |
| 5 Sep 2024, 08:59 | 7.66 | 7.66 |
| 1 Aug 2024, 09:58 | 7.9 | 7.9 |
| 9 Jul 2024, 08:47 | 7.91 | 7.91 |
| 21 Jun 2024, 13:18 | 8.02 | 8.02 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Jul 2026, 15:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Jun 2026, 10:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 09:27 | 0.072 | 0.072 mg/l |
| 13 Apr 2026, 09:59 | 0.19 | 0.19 mg/l |
| 23 Mar 2026, 12:00 | 0.22 | 0.22 mg/l |
| 7 Jan 2026, 09:20 | 0.41 | 0.41 mg/l |
| 4 Dec 2025, 10:58 | 0.053 | 0.053 mg/l |
| 11 Nov 2025, 11:42 | 0.034 | 0.034 mg/l |
| 17 Oct 2025, 08:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Apr 2025, 08:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2025, 13:17 | 0.12 | 0.12 mg/l |
| 12 Feb 2025, 09:27 | 0.12 | 0.12 mg/l |
| 22 Jan 2025, 12:26 | 0.14 | 0.14 mg/l |
| 4 Dec 2024, 10:06 | 0.094 | 0.094 mg/l |
| 11 Nov 2024, 15:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Oct 2024, 09:24 | 0.033 | 0.033 mg/l |
| 5 Sep 2024, 08:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2024, 09:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2024, 08:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jun 2024, 13:18 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
12 mg/l
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | 12 | 12 mg/l |
| 14 Jul 2026, 15:48 | 14 | 14 mg/l |
| 26 Jun 2026, 10:11 | 14 | 14 mg/l |
| 14 May 2026, 09:27 | 11.9 | 11.9 mg/l |
| 13 Apr 2026, 09:59 | 10.9 | 10.9 mg/l |
| 23 Mar 2026, 12:00 | 8.58 | 8.58 mg/l |
| 7 Jan 2026, 09:20 | 9.47 | 9.47 mg/l |
| 4 Dec 2025, 10:58 | 7.24 | 7.24 mg/l |
| 11 Nov 2025, 11:42 | 6.96 | 6.96 mg/l |
| 17 Oct 2025, 08:46 | 15 | 15 mg/l |
| 28 Apr 2025, 08:58 | 9.05 | 9.05 mg/l |
| 5 Mar 2025, 13:17 | 6.59 | 6.59 mg/l |
| 12 Feb 2025, 09:27 | 6 | 6 mg/l |
| 22 Jan 2025, 12:26 | 7.49 | 7.49 mg/l |
| 4 Dec 2024, 10:06 | 6.05 | 6.05 mg/l |
| 11 Nov 2024, 15:47 | 8.65 | 8.65 mg/l |
| 21 Oct 2024, 09:24 | 3.76 | 3.76 mg/l |
| 5 Sep 2024, 08:59 | 12 | 12 mg/l |
| 1 Aug 2024, 09:58 | 9.89 | 9.89 mg/l |
| 9 Jul 2024, 08:47 | 7.68 | 7.68 mg/l |
| 21 Jun 2024, 13:18 | 12 | 12 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.057 mg/l
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | 0.057 | 0.057 mg/l |
| 14 Jul 2026, 15:48 | 0.059 | 0.059 mg/l |
| 26 Jun 2026, 10:11 | 0.071 | 0.071 mg/l |
| 14 May 2026, 09:27 | 0.043 | 0.043 mg/l |
| 13 Apr 2026, 09:59 | 0.032 | 0.032 mg/l |
| 23 Mar 2026, 12:00 | 0.044 | 0.044 mg/l |
| 7 Jan 2026, 09:20 | 0.08 | 0.08 mg/l |
| 4 Dec 2025, 10:58 | 0.052 | 0.052 mg/l |
| 11 Nov 2025, 11:42 | 0.08 | 0.08 mg/l |
| 17 Oct 2025, 08:46 | 0.088 | 0.088 mg/l |
| 28 Apr 2025, 08:58 | 0.068 | 0.068 mg/l |
| 5 Mar 2025, 13:17 | 0.032 | 0.032 mg/l |
| 12 Feb 2025, 09:27 | 0.046 | 0.046 mg/l |
| 22 Jan 2025, 12:26 | 0.038 | 0.038 mg/l |
| 4 Dec 2024, 10:06 | 0.046 | 0.046 mg/l |
| 11 Nov 2024, 15:47 | 0.051 | 0.051 mg/l |
| 21 Oct 2024, 09:24 | 0.074 | 0.074 mg/l |
| 5 Sep 2024, 08:59 | 0.06 | 0.06 mg/l |
| 1 Aug 2024, 09:58 | 0.12 | 0.12 mg/l |
| 9 Jul 2024, 08:47 | 0.058 | 0.058 mg/l |
| 21 Jun 2024, 13:18 | 0.038 | 0.038 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
735 µS/cm
Sampled 1 Sep 2026, 30 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 10:38 | 735 | 735 µS/cm |
| 14 Jul 2026, 15:48 | 741 | 741 µS/cm |
| 26 Jun 2026, 10:11 | 737 | 737 µS/cm |
| 14 May 2026, 09:27 | 657 | 657 µS/cm |
| 13 Apr 2026, 09:59 | 658 | 658 µS/cm |
| 23 Mar 2026, 12:00 | 620 | 620 µS/cm |
| 7 Jan 2026, 09:20 | 664 | 664 µS/cm |
| 4 Dec 2025, 10:58 | 627 | 627 µS/cm |
| 11 Nov 2025, 11:42 | 587 | 587 µS/cm |
| 17 Oct 2025, 08:46 | 736 | 736 µS/cm |
| 28 Apr 2025, 08:58 | 633 | 633 µS/cm |
| 5 Mar 2025, 13:17 | 579 | 579 µS/cm |
| 12 Feb 2025, 09:27 | 556 | 556 µS/cm |
| 22 Jan 2025, 12:26 | 588 | 588 µS/cm |
| 4 Dec 2024, 10:06 | 544 | 544 µS/cm |
| 11 Nov 2024, 15:47 | 626 | 626 µS/cm |
| 21 Oct 2024, 09:24 | 475 | 475 µS/cm |
| 5 Sep 2024, 08:59 | 686 | 686 µS/cm |
| 1 Aug 2024, 09:58 | 674 | 674 µS/cm |
| 9 Jul 2024, 08:47 | 587 | 587 µS/cm |
| 21 Jun 2024, 13:18 | 668 | 668 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 | 21 | Jun 2024 – Sep 2026 | 82.1% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Jun 2024 – Sep 2026 | 8.03 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 21 | Jun 2024 – Sep 2026 | 16.3 °C 1 Sep 2026 |
| pH 0061 | River water | 21 | Jun 2024 – Sep 2026 | 7.84 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Jun 2024 – Sep 2026 | below 0.03 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 21 | Jun 2024 – Sep 2026 | 12 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Jun 2024 – Sep 2026 | 0.057 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Jun 2024 – Sep 2026 | 735 µS/cm 1 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Jun 2024 – Sep 2026 | 160 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 21 | Jun 2024 – Sep 2026 | below 0.0006 mg/l 1 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – Sep 2026 | below 3 mg/l 1 Sep 2026 |
| Nitrite as N 0118 | River water | 21 | Jun 2024 – Sep 2026 | 0.012 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Jun 2024 – Sep 2026 | 12 mg/l 1 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.