Chapel St Leonards Main Drain
EA name: CHAPEL ST LEONARDS MAIN DRAIN
Environment Agency sampling point AN-CHAPELDR · 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
- 15 May 2026, 09:145 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
- 24 since 18 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 556000, 372900As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
104.2%
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | 104.2 | 104.2% |
| 27 Apr 2026, 10:06 | 109.2 | 109.2% |
| 13 Mar 2026, 08:59 | 92.3 | 92.3% |
| 9 Feb 2026, 10:46 | 83.7 | 83.7% |
| 14 Jan 2026, 09:53 | 78.2 | 78.2% |
| 5 Dec 2025, 09:22 | 90.4 | 90.4% |
| 7 Nov 2025, 08:04 | 75.2 | 75.2% |
| 13 Oct 2025, 11:10 | 71.4 | 71.4% |
| 1 Sep 2025, 13:14 | 85.3 | 85.3% |
| 6 Aug 2025, 08:59 | 69.1 | 69.1% |
| 24 Jul 2025, 08:22 | 81.7 | 81.7% |
| 3 Jun 2025, 08:03 | 92.7 | 92.7% |
| 8 May 2025, 10:11 | 116.8 | 116.8% |
| 2 Apr 2025, 12:05 | 108.9 | 108.9% |
| 7 Mar 2025, 08:10 | 108.8 | 108.8% |
| 7 Feb 2025, 08:55 | 97.9 | 97.9% |
| 20 Jan 2025, 11:30 | 92.3 | 92.3% |
| 9 Dec 2024, 12:22 | 88.1 | 88.1% |
| 19 Nov 2024, 10:53 | 93.5 | 93.5% |
| 16 Oct 2024, 11:39 | 93.9 | 93.9% |
| 16 Sep 2024, 09:21 | 68.1 | 68.1% |
| 21 Aug 2024, 08:41 | 74.1 | 74.1% |
| 16 Jul 2024, 09:51 | 76.1 | 76.1% |
| 18 Jun 2024, 08:38 | 90.2 | 90.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.6 mg/l
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | 11.6 | 11.6 mg/l |
| 27 Apr 2026, 10:06 | 11.3 | 11.3 mg/l |
| 13 Mar 2026, 08:59 | 10.8 | 10.8 mg/l |
| 9 Feb 2026, 10:46 | 10 | 10 mg/l |
| 14 Jan 2026, 09:53 | 10.1 | 10.1 mg/l |
| 5 Dec 2025, 09:22 | 11.3 | 11.3 mg/l |
| 7 Nov 2025, 08:04 | 8.12 | 8.12 mg/l |
| 13 Oct 2025, 11:10 | 7.41 | 7.41 mg/l |
| 1 Sep 2025, 13:14 | 8.17 | 8.17 mg/l |
| 6 Aug 2025, 08:59 | 6.96 | 6.96 mg/l |
| 24 Jul 2025, 08:22 | 7.67 | 7.67 mg/l |
| 3 Jun 2025, 08:03 | 9.38 | 9.38 mg/l |
| 8 May 2025, 10:11 | 12.5 | 12.5 mg/l |
| 2 Apr 2025, 12:05 | 12.2 | 12.2 mg/l |
| 7 Mar 2025, 08:10 | 13 | 13 mg/l |
| 7 Feb 2025, 08:55 | 12.8 | 12.8 mg/l |
| 20 Jan 2025, 11:30 | 11.7 | 11.7 mg/l |
| 9 Dec 2024, 12:22 | 10.5 | 10.5 mg/l |
| 19 Nov 2024, 10:53 | 11.7 | 11.7 mg/l |
| 16 Oct 2024, 11:39 | 10.2 | 10.2 mg/l |
| 16 Sep 2024, 09:21 | 7.22 | 7.22 mg/l |
| 21 Aug 2024, 08:41 | 7.42 | 7.42 mg/l |
| 16 Jul 2024, 09:51 | 7.54 | 7.54 mg/l |
| 18 Jun 2024, 08:38 | 8.94 | 8.94 mg/l |
Water temperature
code 0076 · °C
10.5 °C
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | 10.5 | 10.5 °C |
| 27 Apr 2026, 10:06 | 13.9 | 13.9 °C |
| 13 Mar 2026, 08:59 | 8.4 | 8.4 °C |
| 9 Feb 2026, 10:46 | 7.4 | 7.4 °C |
| 14 Jan 2026, 09:53 | 4.6 | 4.6 °C |
| 5 Dec 2025, 09:22 | 5.7 | 5.7 °C |
| 7 Nov 2025, 08:04 | 11.8 | 11.8 °C |
| 13 Oct 2025, 11:10 | 13.6 | 13.6 °C |
| 1 Sep 2025, 13:14 | 17.3 | 17.3 °C |
| 6 Aug 2025, 08:59 | 14.9 | 14.9 °C |
| 24 Jul 2025, 08:22 | 18.3 | 18.3 °C |
| 3 Jun 2025, 08:03 | 14.7 | 14.7 °C |
| 8 May 2025, 10:11 | 12.3 | 12.3 °C |
| 2 Apr 2025, 12:05 | 10.3 | 10.3 °C |
| 7 Mar 2025, 08:10 | 7.6 | 7.6 °C |
| 7 Feb 2025, 08:55 | 4 | 4 °C |
| 20 Jan 2025, 11:30 | 5.1 | 5.1 °C |
| 9 Dec 2024, 12:22 | 7.8 | 7.8 °C |
| 19 Nov 2024, 10:53 | 5.6 | 5.6 °C |
| 16 Oct 2024, 11:39 | 11.6 | 11.6 °C |
| 16 Sep 2024, 09:21 | 12.6 | 12.6 °C |
| 21 Aug 2024, 08:41 | 15.2 | 15.2 °C |
| 16 Jul 2024, 09:51 | 15.7 | 15.7 °C |
| 18 Jun 2024, 08:38 | 15.7 | 15.7 °C |
pH
code 0061
8.05
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | 8.05 | 8.05 |
| 27 Apr 2026, 10:06 | 7.91 | 7.91 |
| 13 Mar 2026, 08:59 | 8.22 | 8.22 |
| 9 Feb 2026, 10:46 | 7.68 | 7.68 |
| 14 Jan 2026, 09:53 | 7.8 | 7.8 |
| 5 Dec 2025, 09:22 | 7.76 | 7.76 |
| 7 Nov 2025, 08:04 | 7.79 | 7.79 |
| 13 Oct 2025, 11:10 | 7.7 | 7.7 |
| 1 Sep 2025, 13:14 | 7.41 | 7.41 |
| 6 Aug 2025, 08:59 | 7.5 | 7.5 |
| 24 Jul 2025, 08:22 | 7.57 | 7.57 |
| 3 Jun 2025, 08:03 | 7.91 | 7.91 |
| 8 May 2025, 10:11 | 8.1 | 8.1 |
| 2 Apr 2025, 12:05 | 8 | 8 |
| 7 Mar 2025, 08:10 | 8.06 | 8.06 |
| 7 Feb 2025, 08:55 | 8.18 | 8.18 |
| 20 Jan 2025, 11:30 | 7.76 | 7.76 |
| 9 Dec 2024, 12:22 | 7.66 | 7.66 |
| 19 Nov 2024, 10:53 | 7.99 | 7.99 |
| 16 Oct 2024, 11:39 | 7.85 | 7.85 |
| 16 Sep 2024, 09:21 | 7.68 | 7.68 |
| 21 Aug 2024, 08:41 | 7.74 | 7.74 |
| 16 Jul 2024, 09:51 | 7.66 | 7.66 |
| 18 Jun 2024, 08:38 | 7.78 | 7.78 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Apr 2026, 10:06 | 0.089 | 0.089 mg/l |
| 13 Mar 2026, 08:59 | 0.053 | 0.053 mg/l |
| 9 Feb 2026, 10:46 | 0.059 | 0.059 mg/l |
| 14 Jan 2026, 09:53 | 0.078 | 0.078 mg/l |
| 5 Dec 2025, 09:22 | 0.084 | 0.084 mg/l |
| 7 Nov 2025, 08:04 | 0.28 | 0.28 mg/l |
| 13 Oct 2025, 11:10 | 0.45 | 0.45 mg/l |
| 1 Sep 2025, 13:14 | 0.46 | 0.46 mg/l |
| 6 Aug 2025, 08:59 | 0.22 | 0.22 mg/l |
| 24 Jul 2025, 08:22 | 0.095 | 0.095 mg/l |
| 3 Jun 2025, 08:03 | 0.34 | 0.34 mg/l |
| 8 May 2025, 10:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Apr 2025, 12:05 | 0.25 | 0.25 mg/l |
| 7 Mar 2025, 08:10 | 0.031 | 0.031 mg/l |
| 7 Feb 2025, 08:55 | 0.056 | 0.056 mg/l |
| 20 Jan 2025, 11:30 | 0.099 | 0.099 mg/l |
| 9 Dec 2024, 12:22 | 0.065 | 0.065 mg/l |
| 19 Nov 2024, 10:53 | 0.15 | 0.15 mg/l |
| 16 Oct 2024, 11:39 | 0.062 | 0.062 mg/l |
| 16 Sep 2024, 09:21 | 0.17 | 0.17 mg/l |
| 21 Aug 2024, 08:41 | 0.065 | 0.065 mg/l |
| 16 Jul 2024, 09:51 | 0.16 | 0.16 mg/l |
| 18 Jun 2024, 08:38 | 0.063 | 0.063 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.88 mg/l
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | 1.88 | 1.88 mg/l |
| 27 Apr 2026, 10:06 | 0.973 | 0.973 mg/l |
| 13 Mar 2026, 08:59 | 6.19 | 6.19 mg/l |
| 9 Feb 2026, 10:46 | 8.38 | 8.38 mg/l |
| 14 Jan 2026, 09:53 | 8.17 | 8.17 mg/l |
| 5 Dec 2025, 09:22 | 6.66 | 6.66 mg/l |
| 7 Nov 2025, 08:04 | 0.294 | 0.294 mg/l |
| 13 Oct 2025, 11:10 | 0.175 | 0.175 mg/l |
| 1 Sep 2025, 13:14 | 0.193 | 0.193 mg/l |
| 6 Aug 2025, 08:59 | <0.196 | below 0.196 mg/l (not detected above this) |
| 24 Jul 2025, 08:22 | 0.193 | 0.193 mg/l |
| 3 Jun 2025, 08:03 | 0.206 | 0.206 mg/l |
| 8 May 2025, 10:11 | 1.18 | 1.18 mg/l |
| 2 Apr 2025, 12:05 | 3.78 | 3.78 mg/l |
| 7 Mar 2025, 08:10 | 4.09 | 4.09 mg/l |
| 7 Feb 2025, 08:55 | 6.59 | 6.59 mg/l |
| 20 Jan 2025, 11:30 | 7.29 | 7.29 mg/l |
| 9 Dec 2024, 12:22 | 8.18 | 8.18 mg/l |
| 19 Nov 2024, 10:53 | 4.57 | 4.57 mg/l |
| 16 Oct 2024, 11:39 | 4.37 | 4.37 mg/l |
| 16 Sep 2024, 09:21 | 1.87 | 1.87 mg/l |
| 21 Aug 2024, 08:41 | 1.49 | 1.49 mg/l |
| 16 Jul 2024, 09:51 | 1.08 | 1.08 mg/l |
| 18 Jun 2024, 08:38 | 2.37 | 2.37 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | <0.01 | below 0.01 mg/l (not detected above this) |
| 27 Apr 2026, 10:06 | 0.016 | 0.016 mg/l |
| 13 Mar 2026, 08:59 | 0.028 | 0.028 mg/l |
| 9 Feb 2026, 10:46 | 0.045 | 0.045 mg/l |
| 14 Jan 2026, 09:53 | 0.051 | 0.051 mg/l |
| 5 Dec 2025, 09:22 | 0.037 | 0.037 mg/l |
| 7 Nov 2025, 08:04 | 0.03 | 0.03 mg/l |
| 13 Oct 2025, 11:10 | 0.021 | 0.021 mg/l |
| 1 Sep 2025, 13:14 | 0.068 | 0.068 mg/l |
| 6 Aug 2025, 08:59 | 0.032 | 0.032 mg/l |
| 24 Jul 2025, 08:22 | 0.1 | 0.1 mg/l |
| 3 Jun 2025, 08:03 | 0.02 | 0.02 mg/l |
| 8 May 2025, 10:11 | 0.014 | 0.014 mg/l |
| 2 Apr 2025, 12:05 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Mar 2025, 08:10 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Feb 2025, 08:55 | 0.026 | 0.026 mg/l |
| 20 Jan 2025, 11:30 | 0.039 | 0.039 mg/l |
| 9 Dec 2024, 12:22 | 0.08 | 0.08 mg/l |
| 19 Nov 2024, 10:53 | 0.063 | 0.063 mg/l |
| 16 Oct 2024, 11:39 | 0.04 | 0.04 mg/l |
| 16 Sep 2024, 09:21 | 0.087 | 0.087 mg/l |
| 21 Aug 2024, 08:41 | 0.027 | 0.027 mg/l |
| 16 Jul 2024, 09:51 | 0.061 | 0.061 mg/l |
| 18 Jun 2024, 08:38 | 0.015 | 0.015 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
7278 µS/cm
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 09:14 | 7278 | 7278 µS/cm |
| 27 Apr 2026, 10:06 | 12326 | 12326 µS/cm |
| 13 Mar 2026, 08:59 | 4728 | 4728 µS/cm |
| 9 Feb 2026, 10:46 | 1086 | 1086 µS/cm |
| 14 Jan 2026, 09:53 | 1658 | 1658 µS/cm |
| 5 Dec 2025, 09:22 | 6681 | 6681 µS/cm |
| 7 Nov 2025, 08:04 | 15068 | 15068 µS/cm |
| 13 Oct 2025, 11:10 | 17986 | 17986 µS/cm |
| 1 Sep 2025, 13:14 | 21043 | 21043 µS/cm |
| 6 Aug 2025, 08:59 | 14634 | 14634 µS/cm |
| 24 Jul 2025, 08:22 | 10364 | 10364 µS/cm |
| 3 Jun 2025, 08:03 | 16809 | 16809 µS/cm |
| 8 May 2025, 10:11 | 9657 | 9657 µS/cm |
| 2 Apr 2025, 12:05 | 15785 | 15785 µS/cm |
| 7 Mar 2025, 08:10 | 2135 | 2135 µS/cm |
| 7 Feb 2025, 08:55 | 2058 | 2058 µS/cm |
| 20 Jan 2025, 11:30 | 6215 | 6215 µS/cm |
| 9 Dec 2024, 12:22 | 820 | 820 µS/cm |
| 19 Nov 2024, 10:53 | 6186 | 6186 µS/cm |
| 16 Oct 2024, 11:39 | 6896 | 6896 µS/cm |
| 16 Sep 2024, 09:21 | 9209 | 9209 µS/cm |
| 21 Aug 2024, 08:41 | 10302 | 10302 µS/cm |
| 16 Jul 2024, 09:51 | 3313 | 3313 µS/cm |
| 18 Jun 2024, 08:38 | 10461 | 10461 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 | 24 | Jun 2024 – May 2026 | 104.2% 15 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 11.6 mg/l 15 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 10.5 °C 15 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 8.05 15 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | below 0.03 mg/l 15 May 2026 |
| Nitrate as N 0117 | River water | 24 | Jun 2024 – May 2026 | 1.88 mg/l 15 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | below 0.01 mg/l 15 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 7278 µS/cm 15 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 190 mg/l 15 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | below 0.00057 mg/l 15 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 2 mg/l 15 May 2026 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | 0.024 mg/l 15 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 1.9 mg/l 15 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.