Rea Brook at Lea Cross
EA name: REA BROOK AT LEA CROSS
Environment Agency sampling point MD-29270780 · 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
- 28 May 2026, 12:454 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
- 22 since 14 Jun 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 341900, 308400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Rea Brook
- River, by the map
- Rea BrookPlaced on the river its name gives, 22 m from the line.
- Next gauge downstream
- Hookagate On the Rea Brook · 7.0 km along the river
- Nearest gauge upstream
- Farley Bridge On the Rea Brook · 4.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.2%
Sampled 28 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | 102.2 | 102.2% |
| 14 May 2026, 15:31 | 98.6 | 98.6% |
| 27 Apr 2026, 10:28 | 106.1 | 106.1% |
| 27 Apr 2026, 10:27 | 100.2 | 100.2% |
| 17 Mar 2026, 12:19 | 90.9 | 90.9% |
| 7 Jan 2026, 09:20 | 94 | 94% |
| 10 Dec 2025, 11:12 | 92.7 | 92.7% |
| 25 Nov 2025, 11:24 | 94.3 | 94.3% |
| 14 Oct 2025, 14:06 | 95.4 | 95.4% |
| 1 Sep 2025, 10:10 | 86.8 | 86.8% |
| 12 Aug 2025, 12:08 | 100.3 | 100.3% |
| 21 Jul 2025, 12:40 | 110.2 | 110.2% |
| 24 Jun 2025, 09:34 | 98.8 | 98.8% |
| 21 May 2025, 10:54 | 84 | 84% |
| 16 Apr 2025, 13:49 | 98.6 | 98.6% |
| 12 Mar 2025, 08:47 | 96.1 | 96.1% |
| 4 Feb 2025, 12:27 | 96.9 | 96.9% |
| 20 Jan 2025, 14:35 | 99.5 | 99.5% |
| 6 Dec 2024, 11:27 | 90.9 | 90.9% |
| 27 Nov 2024, 11:42 | 91.3 | 91.3% |
| 19 Aug 2024, 11:53 | 100.5 | 100.5% |
| 14 Jun 2024, 10:20 | 98.8 | 98.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.32 mg/l
Sampled 28 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | 9.32 | 9.32 mg/l |
| 14 May 2026, 15:31 | 10.5 | 10.5 mg/l |
| 27 Apr 2026, 10:28 | 11.2 | 11.2 mg/l |
| 27 Apr 2026, 10:27 | 10.6 | 10.6 mg/l |
| 17 Mar 2026, 12:19 | 10.3 | 10.3 mg/l |
| 7 Jan 2026, 09:20 | 11.9 | 11.9 mg/l |
| 10 Dec 2025, 11:12 | 10.7 | 10.7 mg/l |
| 25 Nov 2025, 11:24 | 11.5 | 11.5 mg/l |
| 14 Oct 2025, 14:06 | 10.3 | 10.3 mg/l |
| 1 Sep 2025, 10:10 | 8.75 | 8.75 mg/l |
| 12 Aug 2025, 12:08 | 9.41 | 9.41 mg/l |
| 21 Jul 2025, 12:40 | 10.5 | 10.5 mg/l |
| 24 Jun 2025, 09:34 | 9.71 | 9.71 mg/l |
| 21 May 2025, 10:54 | 8.6 | 8.6 mg/l |
| 16 Apr 2025, 13:49 | 11.3 | 11.3 mg/l |
| 12 Mar 2025, 08:47 | 12 | 12 mg/l |
| 4 Feb 2025, 12:27 | 11.6 | 11.6 mg/l |
| 20 Jan 2025, 14:35 | 12.5 | 12.5 mg/l |
| 6 Dec 2024, 11:27 | 10.9 | 10.9 mg/l |
| 27 Nov 2024, 11:42 | 11.1 | 11.1 mg/l |
| 19 Aug 2024, 11:53 | 10.2 | 10.2 mg/l |
| 14 Jun 2024, 10:20 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
19.7 °C
Sampled 28 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | 19.7 | 19.7 °C |
| 14 May 2026, 15:31 | 12.3 | 12.3 °C |
| 27 Apr 2026, 10:28 | 12.7 | 12.7 °C |
| 27 Apr 2026, 10:27 | 12.7 | 12.7 °C |
| 17 Mar 2026, 12:19 | 9.6 | 9.6 °C |
| 7 Jan 2026, 09:20 | 5.4 | 5.4 °C |
| 10 Dec 2025, 11:12 | 9 | 9 °C |
| 25 Nov 2025, 11:24 | 6.7 | 6.7 °C |
| 14 Oct 2025, 14:06 | 12 | 12 °C |
| 1 Sep 2025, 10:10 | 14.9 | 14.9 °C |
| 12 Aug 2025, 12:08 | 18.3 | 18.3 °C |
| 21 Jul 2025, 12:40 | 17.7 | 17.7 °C |
| 24 Jun 2025, 09:34 | 16.1 | 16.1 °C |
| 21 May 2025, 10:54 | 14.2 | 14.2 °C |
| 16 Apr 2025, 13:49 | 9.3 | 9.3 °C |
| 12 Mar 2025, 08:47 | 5.9 | 5.9 °C |
| 4 Feb 2025, 12:27 | 7.5 | 7.5 °C |
| 20 Jan 2025, 14:35 | 5.7 | 5.7 °C |
| 6 Dec 2024, 11:27 | 7.3 | 7.3 °C |
| 27 Nov 2024, 11:42 | 6.9 | 6.9 °C |
| 19 Aug 2024, 11:53 | 14.8 | 14.8 °C |
| 14 Jun 2024, 10:20 | 12.3 | 12.3 °C |
pH
code 0061
8.12
Sampled 28 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | 8.12 | 8.12 |
| 14 May 2026, 15:31 | 8.05 | 8.05 |
| 27 Apr 2026, 10:28 | 8.02 | 8.02 |
| 27 Apr 2026, 10:27 | 8.02 | 8.02 |
| 17 Mar 2026, 12:19 | 7.97 | 7.97 |
| 7 Jan 2026, 09:20 | 7.93 | 7.93 |
| 10 Dec 2025, 11:12 | 7.49 | 7.49 |
| 25 Nov 2025, 11:24 | 7.55 | 7.55 |
| 14 Oct 2025, 14:06 | 8.12 | 8.12 |
| 1 Sep 2025, 10:10 | 8.08 | 8.08 |
| 12 Aug 2025, 12:08 | 8.12 | 8.12 |
| 21 Jul 2025, 12:40 | 8.09 | 8.09 |
| 24 Jun 2025, 09:34 | 8.17 | 8.17 |
| 21 May 2025, 10:54 | 7.82 | 7.82 |
| 16 Apr 2025, 13:49 | 8.09 | 8.09 |
| 12 Mar 2025, 08:47 | 7.96 | 7.96 |
| 4 Feb 2025, 12:27 | 8.06 | 8.06 |
| 20 Jan 2025, 14:35 | 7.98 | 7.98 |
| 6 Dec 2024, 11:27 | 7.46 | 7.46 |
| 27 Nov 2024, 11:42 | 7.56 | 7.56 |
| 19 Aug 2024, 11:53 | 8.05 | 8.05 |
| 14 Jun 2024, 10:20 | 8.15 | 8.15 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 28 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 15:31 | 0.045 | 0.045 mg/l |
| 27 Apr 2026, 10:28 | 0.031 | 0.031 mg/l |
| 27 Apr 2026, 10:27 | 0.035 | 0.035 mg/l |
| 17 Mar 2026, 12:19 | 0.053 | 0.053 mg/l |
| 7 Jan 2026, 09:20 | 0.27 | 0.27 mg/l |
| 10 Dec 2025, 11:12 | 0.07 | 0.07 mg/l |
| 25 Nov 2025, 11:24 | 0.072 | 0.072 mg/l |
| 14 Oct 2025, 14:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Sep 2025, 10:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2025, 12:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jul 2025, 12:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2025, 09:34 | 0.049 | 0.049 mg/l |
| 21 May 2025, 10:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2025, 13:49 | 0.08 | 0.08 mg/l |
| 12 Mar 2025, 08:47 | 0.07 | 0.07 mg/l |
| 4 Feb 2025, 12:27 | 0.069 | 0.069 mg/l |
| 20 Jan 2025, 14:35 | 0.082 | 0.082 mg/l |
| 6 Dec 2024, 11:27 | 0.067 | 0.067 mg/l |
| 27 Nov 2024, 11:42 | 0.23 | 0.23 mg/l |
| 19 Aug 2024, 11:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Jun 2024, 10:20 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.67 mg/l
Sampled 28 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | 3.67 | 3.67 mg/l |
| 14 May 2026, 15:31 | 2.86 | 2.86 mg/l |
| 27 Apr 2026, 10:28 | 2.78 | 2.78 mg/l |
| 27 Apr 2026, 10:27 | 2.88 | 2.88 mg/l |
| 17 Mar 2026, 12:19 | 3.58 | 3.58 mg/l |
| 7 Jan 2026, 09:20 | 4.36 | 4.36 mg/l |
| 10 Dec 2025, 11:12 | 7.07 | 7.07 mg/l |
| 25 Nov 2025, 11:24 | 7.47 | 7.47 mg/l |
| 14 Oct 2025, 14:06 | 1.89 | 1.89 mg/l |
| 1 Sep 2025, 10:10 | 2.79 | 2.79 mg/l |
| 12 Aug 2025, 12:08 | 1.99 | 1.99 mg/l |
| 21 Jul 2025, 12:40 | 2.39 | 2.39 mg/l |
| 24 Jun 2025, 09:34 | 2.58 | 2.58 mg/l |
| 21 May 2025, 10:54 | 2.55 | 2.55 mg/l |
| 16 Apr 2025, 13:49 | 2.75 | 2.75 mg/l |
| 12 Mar 2025, 08:47 | 3.18 | 3.18 mg/l |
| 4 Feb 2025, 12:27 | 3.58 | 3.58 mg/l |
| 20 Jan 2025, 14:35 | 3.58 | 3.58 mg/l |
| 6 Dec 2024, 11:27 | 3.98 | 3.98 mg/l |
| 27 Nov 2024, 11:42 | 3.67 | 3.67 mg/l |
| 19 Aug 2024, 11:53 | 2.59 | 2.59 mg/l |
| 14 Jun 2024, 10:20 | 2.88 | 2.88 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.17 mg/l
Sampled 28 May 2026, 4 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | 0.17 | 0.17 mg/l |
| 14 May 2026, 15:31 | 0.13 | 0.13 mg/l |
| 27 Apr 2026, 10:28 | 0.17 | 0.17 mg/l |
| 27 Apr 2026, 10:27 | 0.16 | 0.16 mg/l |
| 17 Mar 2026, 12:19 | 0.06 | 0.06 mg/l |
| 7 Jan 2026, 09:20 | 0.12 | 0.12 mg/l |
| 10 Dec 2025, 11:12 | 0.079 | 0.079 mg/l |
| 25 Nov 2025, 11:24 | 0.15 | 0.15 mg/l |
| 14 Oct 2025, 14:06 | 0.14 | 0.14 mg/l |
| 1 Sep 2025, 10:10 | 0.15 | 0.15 mg/l |
| 12 Aug 2025, 12:08 | 0.14 | 0.14 mg/l |
| 21 Jul 2025, 12:40 | 0.24 | 0.24 mg/l |
| 24 Jun 2025, 09:34 | 0.21 | 0.21 mg/l |
| 21 May 2025, 10:54 | 0.12 | 0.12 mg/l |
| 16 Apr 2025, 13:49 | 0.15 | 0.15 mg/l |
| 12 Mar 2025, 08:47 | 0.095 | 0.095 mg/l |
| 4 Feb 2025, 12:27 | 0.078 | 0.078 mg/l |
| 20 Jan 2025, 14:35 | 0.056 | 0.056 mg/l |
| 27 Nov 2024, 11:42 | 0.17 | 0.17 mg/l |
| 19 Aug 2024, 11:53 | 0.32 | 0.32 mg/l |
| 14 Jun 2024, 10:20 | 0.26 | 0.26 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
698 µS/cm
Sampled 28 May 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:45 | 698 | 698 µS/cm |
| 14 May 2026, 15:31 | 508 | 508 µS/cm |
| 27 Apr 2026, 10:28 | 515 | 515 µS/cm |
| 27 Apr 2026, 10:27 | 515 | 515 µS/cm |
| 17 Mar 2026, 12:19 | 383 | 383 µS/cm |
| 7 Jan 2026, 09:20 | 620 | 620 µS/cm |
| 10 Dec 2025, 11:12 | 345 | 345 µS/cm |
| 25 Nov 2025, 11:24 | 425 | 425 µS/cm |
| 14 Oct 2025, 14:06 | 667 | 667 µS/cm |
| 1 Sep 2025, 10:10 | 732 | 732 µS/cm |
| 12 Aug 2025, 12:08 | 656 | 656 µS/cm |
| 21 Jul 2025, 12:40 | 675 | 675 µS/cm |
| 24 Jun 2025, 09:34 | 628 | 628 µS/cm |
| 21 May 2025, 10:54 | 511 | 511 µS/cm |
| 16 Apr 2025, 13:49 | 533 | 533 µS/cm |
| 12 Mar 2025, 08:47 | 461 | 461 µS/cm |
| 4 Feb 2025, 12:27 | 392 | 392 µS/cm |
| 20 Jan 2025, 14:35 | 419 | 419 µS/cm |
| 6 Dec 2024, 11:27 | 288 | 288 µS/cm |
| 27 Nov 2024, 11:42 | 324 | 324 µS/cm |
| 19 Aug 2024, 11:53 | 575 | 575 µS/cm |
| 14 Jun 2024, 10:20 | 516 | 516 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 | 22 | Jun 2024 – May 2026 | 102.2% 28 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jun 2024 – May 2026 | 9.32 mg/l 28 May 2026 |
| Temperature of Water 0076 | River water | 22 | Jun 2024 – May 2026 | 19.7 °C 28 May 2026 |
| pH 0061 | River water | 22 | Jun 2024 – May 2026 | 8.12 28 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Jun 2024 – May 2026 | below 0.03 mg/l 28 May 2026 |
| Nitrate as N 0117 | River water | 22 | Jun 2024 – May 2026 | 3.67 mg/l 28 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Jun 2024 – May 2026 | 0.17 mg/l 28 May 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Jun 2024 – May 2026 | 698 µS/cm 28 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Jun 2024 – May 2026 | 190 mg/l 28 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jun 2024 – May 2026 | below 0.00111 mg/l 28 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – May 2026 | 1 mg/l 28 May 2026 |
| Nitrite as N 0118 | River water | 22 | Jun 2024 – May 2026 | 0.03 mg/l 28 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jun 2024 – May 2026 | 3.7 mg/l 28 May 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.