Watermill Stream-Watermill Bridge
EA name: WATERMILL STREAM-WATERMILL BR (also listed as “WATERMILL STREAM AT WATERMILL BRIDGE”)
Environment Agency sampling point SO-F0001968 · 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
- 4 Sep 2026, 10:0127 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 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 573450, 111490As published, to the nearest 10 m. Open in a map
- River, by its own name
- Watermill Stream
- River, by the map
- Watermill StreamPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Sheepwash Bridge On the Cuckmere & Pevensey Levels · 6.4 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (15 samples)
Monitoring (national agency policy) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
70.4%
Sampled 4 Sep 2026, 27 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 70.4 | 70.4% |
| 17 Aug 2026, 10:11 | 73 | 73% |
| 3 Jul 2026, 12:55 | 80.6 | 80.6% |
| 4 Jun 2026, 11:48 | 86.8 | 86.8% |
| 1 May 2026, 09:22 | 89.6 | 89.6% |
| 14 Apr 2026, 11:00 | 99.9 | 99.9% |
| 5 Mar 2026, 08:10 | 95.1 | 95.1% |
| 4 Feb 2026, 08:37 | 97.9 | 97.9% |
| 13 Jan 2026, 10:46 | 96.8 | 96.8% |
| 2 Dec 2025, 14:24 | 95.2 | 95.2% |
| 7 Nov 2025, 14:53 | 88.8 | 88.8% |
| 2 Oct 2025, 13:35 | 87.3 | 87.3% |
| 9 Sep 2025, 11:00 | 78.1 | 78.1% |
| 1 Aug 2025, 11:22 | 82.7 | 82.7% |
| 22 Jul 2025, 11:01 | 76.1 | 76.1% |
| 12 Jun 2025, 12:57 | 90.6 | 90.6% |
| 7 May 2025, 16:05 | 97.1 | 97.1% |
| 3 Apr 2025, 10:05 | 98.5 | 98.5% |
| 12 Mar 2025, 12:29 | 99.2 | 99.2% |
| 25 Feb 2025, 15:17 | 97.6 | 97.6% |
| 29 Jan 2025, 12:08 | 97.2 | 97.2% |
| 6 Dec 2024, 16:03 | 96.2 | 96.2% |
| 21 Nov 2024, 10:50 | 97.6 | 97.6% |
| 15 Oct 2024, 14:29 | 98.3 | 98.3% |
| 27 Sep 2024, 13:45 | 93.8 | 93.8% |
| 31 Jul 2024, 10:50 | 85 | 85% |
| 21 Jun 2024, 10:32 | 95.5 | 95.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.61 mg/l
Sampled 4 Sep 2026, 27 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 6.61 | 6.61 mg/l |
| 17 Aug 2026, 10:11 | 6.89 | 6.89 mg/l |
| 3 Jul 2026, 12:55 | 7.8 | 7.8 mg/l |
| 4 Jun 2026, 11:48 | 8.83 | 8.83 mg/l |
| 1 May 2026, 09:22 | 9.84 | 9.84 mg/l |
| 14 Apr 2026, 11:00 | 11.7 | 11.7 mg/l |
| 5 Mar 2026, 08:10 | 11.4 | 11.4 mg/l |
| 4 Feb 2026, 08:37 | 11.7 | 11.7 mg/l |
| 13 Jan 2026, 10:46 | 11.5 | 11.5 mg/l |
| 2 Dec 2025, 14:24 | 10.9 | 10.9 mg/l |
| 7 Nov 2025, 14:53 | 9.25 | 9.25 mg/l |
| 2 Oct 2025, 13:35 | 9.47 | 9.47 mg/l |
| 9 Sep 2025, 11:00 | 8.12 | 8.12 mg/l |
| 1 Aug 2025, 11:22 | 8.21 | 8.21 mg/l |
| 22 Jul 2025, 11:01 | 7.37 | 7.37 mg/l |
| 12 Jun 2025, 12:57 | 9.05 | 9.05 mg/l |
| 7 May 2025, 16:05 | 10.7 | 10.7 mg/l |
| 3 Apr 2025, 10:05 | 11.3 | 11.3 mg/l |
| 12 Mar 2025, 12:29 | 11.9 | 11.9 mg/l |
| 25 Feb 2025, 15:17 | 11.3 | 11.3 mg/l |
| 29 Jan 2025, 12:08 | 11.9 | 11.9 mg/l |
| 6 Dec 2024, 16:03 | 11.1 | 11.1 mg/l |
| 21 Nov 2024, 10:50 | 12.4 | 12.4 mg/l |
| 15 Oct 2024, 14:29 | 10.2 | 10.2 mg/l |
| 27 Sep 2024, 13:45 | 9.66 | 9.66 mg/l |
| 31 Jul 2024, 10:50 | 8.01 | 8.01 mg/l |
| 21 Jun 2024, 10:32 | 9.82 | 9.82 mg/l |
Water temperature
code 0076 · °C
18.3 °C
Sampled 4 Sep 2026, 27 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 18.3 | 18.3 °C |
| 17 Aug 2026, 10:11 | 18 | 18 °C |
| 3 Jul 2026, 12:55 | 16.8 | 16.8 °C |
| 4 Jun 2026, 11:48 | 14.5 | 14.5 °C |
| 1 May 2026, 09:22 | 11.1 | 11.1 °C |
| 14 Apr 2026, 11:00 | 8.3 | 8.3 °C |
| 5 Mar 2026, 08:10 | 7.4 | 7.4 °C |
| 4 Feb 2026, 08:37 | 7.5 | 7.5 °C |
| 13 Jan 2026, 10:46 | 7.7 | 7.7 °C |
| 2 Dec 2025, 14:24 | 9.4 | 9.4 °C |
| 7 Nov 2025, 14:53 | 13.4 | 13.4 °C |
| 2 Oct 2025, 13:35 | 11.6 | 11.6 °C |
| 9 Sep 2025, 11:00 | 13.5 | 13.5 °C |
| 1 Aug 2025, 11:22 | 15.6 | 15.6 °C |
| 22 Jul 2025, 11:01 | 16.8 | 16.8 °C |
| 12 Jun 2025, 12:57 | 15.3 | 15.3 °C |
| 7 May 2025, 16:05 | 11 | 11 °C |
| 3 Apr 2025, 10:05 | 9.4 | 9.4 °C |
| 12 Mar 2025, 12:29 | 7.3 | 7.3 °C |
| 25 Feb 2025, 15:17 | 8.7 | 8.7 °C |
| 29 Jan 2025, 12:08 | 6.6 | 6.6 °C |
| 6 Dec 2024, 16:03 | 9 | 9 °C |
| 21 Nov 2024, 10:50 | 5.2 | 5.2 °C |
| 15 Oct 2024, 14:29 | 13.4 | 13.4 °C |
| 27 Sep 2024, 13:45 | 13.9 | 13.9 °C |
| 31 Jul 2024, 10:50 | 18.1 | 18.1 °C |
| 21 Jun 2024, 10:32 | 14 | 14 °C |
pH
code 0061
7.5
Sampled 4 Sep 2026, 27 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 7.5 | 7.5 |
| 17 Aug 2026, 10:11 | 7.35 | 7.35 |
| 3 Jul 2026, 12:55 | 7.89 | 7.89 |
| 4 Jun 2026, 11:48 | 7.6 | 7.6 |
| 1 May 2026, 09:22 | 8.12 | 8.12 |
| 14 Apr 2026, 11:00 | 7.71 | 7.71 |
| 5 Mar 2026, 08:10 | 7.49 | 7.49 |
| 4 Feb 2026, 08:37 | 7.35 | 7.35 |
| 13 Jan 2026, 10:46 | 7.39 | 7.39 |
| 2 Dec 2025, 14:24 | 7.32 | 7.32 |
| 7 Nov 2025, 14:53 | 7.36 | 7.36 |
| 2 Oct 2025, 13:35 | 7.63 | 7.63 |
| 9 Sep 2025, 11:00 | 7.41 | 7.41 |
| 1 Aug 2025, 11:22 | 7.76 | 7.76 |
| 22 Jul 2025, 11:01 | 7.29 | 7.29 |
| 12 Jun 2025, 12:57 | 7.51 | 7.51 |
| 7 May 2025, 16:05 | 7.8 | 7.8 |
| 3 Apr 2025, 10:05 | 7.68 | 7.68 |
| 12 Mar 2025, 12:29 | 7.7 | 7.7 |
| 25 Feb 2025, 15:17 | 7.38 | 7.38 |
| 29 Jan 2025, 12:08 | 7.39 | 7.39 |
| 6 Dec 2024, 16:03 | 7.23 | 7.23 |
| 21 Nov 2024, 10:50 | 7.45 | 7.45 |
| 15 Oct 2024, 14:29 | 7.48 | 7.48 |
| 27 Sep 2024, 13:45 | 7.39 | 7.39 |
| 31 Jul 2024, 10:50 | 7.62 | 7.62 |
| 21 Jun 2024, 10:32 | 7.65 | 7.65 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.032 mg/l
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 0.032 | 0.032 mg/l |
| 17 Aug 2026, 10:11 | 0.044 | 0.044 mg/l |
| 3 Jul 2026, 12:55 | 0.04 | 0.04 mg/l |
| 4 Jun 2026, 11:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 May 2026, 09:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Apr 2026, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 08:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2026, 08:37 | 0.033 | 0.033 mg/l |
| 13 Jan 2026, 10:46 | 0.038 | 0.038 mg/l |
| 2 Dec 2025, 14:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2025, 14:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2025, 13:35 | 0.042 | 0.042 mg/l |
| 9 Sep 2025, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2025, 11:22 | 0.22 | 0.22 mg/l |
| 22 Jul 2025, 11:01 | 0.14 | 0.14 mg/l |
| 12 Jun 2025, 12:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 May 2025, 16:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Apr 2025, 10:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Mar 2025, 12:29 | 0.061 | 0.061 mg/l |
| 25 Feb 2025, 15:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jan 2025, 12:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Nov 2024, 10:50 | 0.041 | 0.041 mg/l |
| 15 Oct 2024, 14:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Sep 2024, 13:45 | 0.06 | 0.06 mg/l |
| 31 Jul 2024, 10:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jun 2024, 10:32 | 0.03 | 0.03 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.4 mg/l
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 1.4 | 1.4 mg/l |
| 17 Aug 2026, 10:11 | 2.09 | 2.09 mg/l |
| 3 Jul 2026, 12:55 | 2.59 | 2.59 mg/l |
| 4 Jun 2026, 11:48 | 3.07 | 3.07 mg/l |
| 1 May 2026, 09:22 | 1.2 | 1.2 mg/l |
| 14 Apr 2026, 11:00 | 1.79 | 1.79 mg/l |
| 5 Mar 2026, 08:10 | 1.5 | 1.5 mg/l |
| 4 Feb 2026, 08:37 | 1.4 | 1.4 mg/l |
| 13 Jan 2026, 10:46 | 1.49 | 1.49 mg/l |
| 2 Dec 2025, 14:24 | 1.1 | 1.1 mg/l |
| 7 Nov 2025, 14:53 | 1.2 | 1.2 mg/l |
| 2 Oct 2025, 13:35 | 3.69 | 3.69 mg/l |
| 9 Sep 2025, 11:00 | 1.1 | 1.1 mg/l |
| 1 Aug 2025, 11:22 | 3.69 | 3.69 mg/l |
| 22 Jul 2025, 11:01 | 2.17 | 2.17 mg/l |
| 12 Jun 2025, 12:57 | 2.19 | 2.19 mg/l |
| 7 May 2025, 16:05 | 2.49 | 2.49 mg/l |
| 3 Apr 2025, 10:05 | 2.09 | 2.09 mg/l |
| 12 Mar 2025, 12:29 | 1.99 | 1.99 mg/l |
| 25 Feb 2025, 15:17 | 1.39 | 1.39 mg/l |
| 29 Jan 2025, 12:08 | 1.79 | 1.79 mg/l |
| 21 Nov 2024, 10:50 | 1.39 | 1.39 mg/l |
| 15 Oct 2024, 14:29 | 1.09 | 1.09 mg/l |
| 27 Sep 2024, 13:45 | 1.59 | 1.59 mg/l |
| 31 Jul 2024, 10:50 | 2.49 | 2.49 mg/l |
| 21 Jun 2024, 10:32 | 2.5 | 2.5 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.022 mg/l
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 0.022 | 0.022 mg/l |
| 17 Aug 2026, 10:11 | 0.024 | 0.024 mg/l |
| 3 Jul 2026, 12:55 | 0.026 | 0.026 mg/l |
| 4 Jun 2026, 11:48 | 0.062 | 0.062 mg/l |
| 1 May 2026, 09:22 | 0.017 | 0.017 mg/l |
| 14 Apr 2026, 11:00 | 0.015 | 0.015 mg/l |
| 5 Mar 2026, 08:10 | 0.019 | 0.019 mg/l |
| 4 Feb 2026, 08:37 | 0.034 | 0.034 mg/l |
| 13 Jan 2026, 10:46 | 0.035 | 0.035 mg/l |
| 2 Dec 2025, 14:24 | 0.033 | 0.033 mg/l |
| 7 Nov 2025, 14:53 | 0.02 | 0.02 mg/l |
| 2 Oct 2025, 13:35 | 0.02 | 0.02 mg/l |
| 9 Sep 2025, 11:00 | 0.02 | 0.02 mg/l |
| 1 Aug 2025, 11:22 | 0.067 | 0.067 mg/l |
| 22 Jul 2025, 11:01 | 0.049 | 0.049 mg/l |
| 12 Jun 2025, 12:57 | 0.028 | 0.028 mg/l |
| 7 May 2025, 16:05 | 0.02 | 0.02 mg/l |
| 3 Apr 2025, 10:05 | 0.012 | 0.012 mg/l |
| 12 Mar 2025, 12:29 | 0.016 | 0.016 mg/l |
| 25 Feb 2025, 15:17 | 0.035 | 0.035 mg/l |
| 29 Jan 2025, 12:08 | 0.022 | 0.022 mg/l |
| 21 Nov 2024, 10:50 | 0.026 | 0.026 mg/l |
| 15 Oct 2024, 14:29 | 0.039 | 0.039 mg/l |
| 27 Sep 2024, 13:45 | 0.084 | 0.084 mg/l |
| 31 Jul 2024, 10:50 | 0.028 | 0.028 mg/l |
| 21 Jun 2024, 10:32 | 0.031 | 0.031 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
473 µS/cm
Sampled 4 Sep 2026, 27 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:01 | 473 | 473 µS/cm |
| 17 Aug 2026, 10:11 | 527 | 527 µS/cm |
| 3 Jul 2026, 12:55 | 472 | 472 µS/cm |
| 4 Jun 2026, 11:48 | 426 | 426 µS/cm |
| 1 May 2026, 09:22 | 361 | 361 µS/cm |
| 14 Apr 2026, 11:00 | 356 | 356 µS/cm |
| 5 Mar 2026, 08:10 | 314 | 314 µS/cm |
| 4 Feb 2026, 08:37 | 272 | 272 µS/cm |
| 13 Jan 2026, 10:46 | 335 | 335 µS/cm |
| 2 Dec 2025, 14:24 | 328 | 328 µS/cm |
| 7 Nov 2025, 14:53 | 395 | 395 µS/cm |
| 2 Oct 2025, 13:35 | 489 | 489 µS/cm |
| 9 Sep 2025, 11:00 | 462 | 462 µS/cm |
| 1 Aug 2025, 11:22 | 498 | 498 µS/cm |
| 22 Jul 2025, 11:01 | 450 | 450 µS/cm |
| 12 Jun 2025, 12:57 | 430 | 430 µS/cm |
| 7 May 2025, 16:05 | 398 | 398 µS/cm |
| 3 Apr 2025, 10:05 | 360 | 360 µS/cm |
| 12 Mar 2025, 12:29 | 333 | 333 µS/cm |
| 25 Feb 2025, 15:17 | 303 | 303 µS/cm |
| 29 Jan 2025, 12:08 | 315 | 315 µS/cm |
| 6 Dec 2024, 16:03 | 283 | 283 µS/cm |
| 21 Nov 2024, 10:50 | 323 | 323 µS/cm |
| 15 Oct 2024, 14:29 | 297 | 297 µS/cm |
| 27 Sep 2024, 13:45 | 284 | 284 µS/cm |
| 31 Jul 2024, 10:50 | 438 | 438 µS/cm |
| 21 Jun 2024, 10:32 | 409 | 409 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 | 27 | Jun 2024 – Sep 2026 | 70.4% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – Sep 2026 | 6.61 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – Sep 2026 | 18.3 °C 4 Sep 2026 |
| pH 0061 | River water | 27 | Jun 2024 – Sep 2026 | 7.5 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Jun 2024 – Sep 2026 | 0.032 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – Sep 2026 | 1.4 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Jun 2024 – Sep 2026 | 0.022 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – Sep 2026 | 473 µS/cm 4 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Jun 2024 – Sep 2026 | 86 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Jun 2024 – Sep 2026 | 0.00035 mg/l 4 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.2 mg/l 1 May 2026 |
| Nitrite as N 0118 | River water | 26 | Jun 2024 – Sep 2026 | 0.0043 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jun 2024 – Sep 2026 | 1.4 mg/l 4 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.