Boathouse Sluice upstream of Martin Mere
EA name: BOATHOUSE SLUICE U/S MARTIN MERE
Environment Agency sampling point NW-88009758 · 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
- 8 Oct 2025, 13:4012 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
- 20 since 6 Dec 2023 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 342450, 414000As published, to the nearest 10 m. Open in a map
- River, by its own name
- Boathouse Sluice
- River, by the map
- Boat House SluicePlaced on the river its name gives, 22 m from the line.
- Next gauge downstream
- Crossens Pumping Station On the Sluice · 8.8 km along the river
- Why it was sampled
- Monitoring (national agency policy) (18 samples)
Environmental monitoring statutory (EU directives) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.7%
Sampled 8 Oct 2025, 12 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 102.7 | 102.7% |
| 16 Sep 2025, 12:58 | 95.7 | 95.7% |
| 1 Aug 2025, 11:18 | 95.4 | 95.4% |
| 1 Jul 2025, 09:24 | 87.4 | 87.4% |
| 3 Jun 2025, 11:14 | 102.7 | 102.7% |
| 1 May 2025, 09:55 | 98.2 | 98.2% |
| 9 Apr 2025, 12:49 | 111.5 | 111.5% |
| 26 Mar 2025, 10:46 | 105.8 | 105.8% |
| 5 Feb 2025, 13:58 | 101.2 | 101.2% |
| 21 Jan 2025, 11:48 | 101.4 | 101.4% |
| 3 Dec 2024, 10:50 | 101.8 | 101.8% |
| 18 Nov 2024, 12:01 | 101.5 | 101.5% |
| 23 Oct 2024, 09:26 | 102 | 102% |
| 17 Sep 2024, 10:08 | 98 | 98% |
| 22 Aug 2024, 12:52 | 101 | 101% |
| 19 Jul 2024, 11:38 | 58.8 | 58.8% |
| 20 Jun 2024, 12:02 | 103.5 | 103.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.2 mg/l
Sampled 8 Oct 2025, 12 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 10.2 | 10.2 mg/l |
| 16 Sep 2025, 12:58 | 9.48 | 9.48 mg/l |
| 1 Aug 2025, 11:18 | 9.03 | 9.03 mg/l |
| 1 Jul 2025, 09:24 | 8.02 | 8.02 mg/l |
| 3 Jun 2025, 11:14 | 10.2 | 10.2 mg/l |
| 1 May 2025, 09:55 | 9.67 | 9.67 mg/l |
| 9 Apr 2025, 12:49 | 11.5 | 11.5 mg/l |
| 26 Mar 2025, 10:46 | 11.4 | 11.4 mg/l |
| 5 Feb 2025, 13:58 | 11.6 | 11.6 mg/l |
| 21 Jan 2025, 11:48 | 11.9 | 11.9 mg/l |
| 3 Dec 2024, 10:50 | 11.6 | 11.6 mg/l |
| 18 Nov 2024, 12:01 | 11.3 | 11.3 mg/l |
| 23 Oct 2024, 09:26 | 10.8 | 10.8 mg/l |
| 17 Sep 2024, 10:08 | 9.71 | 9.71 mg/l |
| 22 Aug 2024, 12:52 | 9.7 | 9.7 mg/l |
| 19 Jul 2024, 11:38 | 5.42 | 5.42 mg/l |
| 20 Jun 2024, 12:02 | 9.98 | 9.98 mg/l |
Water temperature
code 0076 · °C
15.7 °C
Sampled 8 Oct 2025, 12 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 15.7 | 15.7 °C |
| 16 Sep 2025, 12:58 | 15.7 | 15.7 °C |
| 1 Aug 2025, 11:18 | 17.9 | 17.9 °C |
| 1 Jul 2025, 09:24 | 19.4 | 19.4 °C |
| 3 Jun 2025, 11:14 | 15.4 | 15.4 °C |
| 1 May 2025, 09:55 | 16 | 16 °C |
| 9 Apr 2025, 12:49 | 13.8 | 13.8 °C |
| 26 Mar 2025, 10:46 | 11.9 | 11.9 °C |
| 5 Feb 2025, 13:58 | 9.2 | 9.2 °C |
| 21 Jan 2025, 11:48 | 8.3 | 8.3 °C |
| 3 Dec 2024, 10:50 | 9.5 | 9.5 °C |
| 18 Nov 2024, 12:01 | 10.6 | 10.6 °C |
| 23 Oct 2024, 09:26 | 12.7 | 12.7 °C |
| 17 Sep 2024, 10:08 | 15.7 | 15.7 °C |
| 22 Aug 2024, 12:52 | 17.2 | 17.2 °C |
| 19 Jul 2024, 11:38 | 19.2 | 19.2 °C |
| 20 Jun 2024, 12:02 | 17 | 17 °C |
pH
code 0061
7.85
Sampled 8 Oct 2025, 12 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 7.85 | 7.85 |
| 16 Sep 2025, 12:58 | 7.51 | 7.51 |
| 1 Aug 2025, 11:18 | 7.59 | 7.59 |
| 1 Jul 2025, 09:24 | 7.54 | 7.54 |
| 3 Jun 2025, 11:14 | 7.47 | 7.47 |
| 1 May 2025, 09:55 | 7.2 | 7.2 |
| 9 Apr 2025, 12:49 | 7.4 | 7.4 |
| 26 Mar 2025, 10:46 | 7.28 | 7.28 |
| 5 Feb 2025, 13:58 | 7.45 | 7.45 |
| 21 Jan 2025, 11:48 | 7.47 | 7.47 |
| 3 Dec 2024, 10:50 | 7.61 | 7.61 |
| 18 Nov 2024, 12:01 | 7.58 | 7.58 |
| 23 Oct 2024, 09:26 | 7.53 | 7.53 |
| 17 Sep 2024, 10:08 | 7.63 | 7.63 |
| 22 Aug 2024, 12:52 | 7.59 | 7.59 |
| 19 Jul 2024, 11:38 | 7.26 | 7.26 |
| 20 Jun 2024, 12:02 | 7.63 | 7.63 |
| 4 Apr 2024, 09:39 | 7.45 | 7.45 |
| 3 Jan 2024, 10:42 | 7.64 | 7.64 |
| 6 Dec 2023, 13:03 | 7.54 | 7.54 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.057 mg/l
Sampled 8 Oct 2025, 12 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 0.057 | 0.057 mg/l |
| 16 Sep 2025, 12:58 | 0.052 | 0.052 mg/l |
| 1 Jul 2025, 09:24 | 0.049 | 0.049 mg/l |
| 3 Jun 2025, 11:14 | 0.52 | 0.52 mg/l |
| 1 May 2025, 09:55 | 0.22 | 0.22 mg/l |
| 9 Apr 2025, 12:49 | 0.31 | 0.31 mg/l |
| 26 Mar 2025, 10:46 | 0.18 | 0.18 mg/l |
| 5 Feb 2025, 13:58 | 0.15 | 0.15 mg/l |
| 21 Jan 2025, 11:48 | 0.12 | 0.12 mg/l |
| 3 Dec 2024, 10:50 | 0.039 | 0.039 mg/l |
| 18 Nov 2024, 12:01 | 0.034 | 0.034 mg/l |
| 23 Oct 2024, 09:26 | 0.036 | 0.036 mg/l |
| 17 Sep 2024, 10:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Aug 2024, 12:52 | 0.036 | 0.036 mg/l |
| 19 Jul 2024, 11:38 | 0.066 | 0.066 mg/l |
| 20 Jun 2024, 12:02 | 0.036 | 0.036 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
18 mg/l
Sampled 8 Oct 2025, 12 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 18 | 18 mg/l |
| 16 Sep 2025, 12:58 | 19 | 19 mg/l |
| 1 Jul 2025, 09:24 | 28 | 28 mg/l |
| 3 Jun 2025, 11:14 | 19.9 | 19.9 mg/l |
| 1 May 2025, 09:55 | 36.9 | 36.9 mg/l |
| 9 Apr 2025, 12:49 | 36.9 | 36.9 mg/l |
| 26 Mar 2025, 10:46 | 32.9 | 32.9 mg/l |
| 5 Feb 2025, 13:58 | 23 | 23 mg/l |
| 21 Jan 2025, 11:48 | 19 | 19 mg/l |
| 3 Dec 2024, 10:50 | 15 | 15 mg/l |
| 18 Nov 2024, 12:01 | 19 | 19 mg/l |
| 23 Oct 2024, 09:26 | 18 | 18 mg/l |
| 17 Sep 2024, 10:08 | 25 | 25 mg/l |
| 22 Aug 2024, 12:52 | 29 | 29 mg/l |
| 19 Jul 2024, 11:38 | 11.8 | 11.8 mg/l |
| 20 Jun 2024, 12:02 | 28 | 28 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.21 mg/l
Sampled 8 Oct 2025, 12 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 0.21 | 0.21 mg/l |
| 16 Sep 2025, 12:58 | 0.079 | 0.079 mg/l |
| 1 Jul 2025, 09:24 | 0.15 | 0.15 mg/l |
| 3 Jun 2025, 11:14 | 0.12 | 0.12 mg/l |
| 1 May 2025, 09:55 | 0.089 | 0.089 mg/l |
| 9 Apr 2025, 12:49 | 0.05 | 0.05 mg/l |
| 26 Mar 2025, 10:46 | 0.076 | 0.076 mg/l |
| 5 Feb 2025, 13:58 | 0.063 | 0.063 mg/l |
| 21 Jan 2025, 11:48 | 0.075 | 0.075 mg/l |
| 3 Dec 2024, 10:50 | 0.083 | 0.083 mg/l |
| 18 Nov 2024, 12:01 | 0.037 | 0.037 mg/l |
| 23 Oct 2024, 09:26 | 0.059 | 0.059 mg/l |
| 17 Sep 2024, 10:08 | 0.08 | 0.08 mg/l |
| 22 Aug 2024, 12:52 | 0.089 | 0.089 mg/l |
| 19 Jul 2024, 11:38 | 0.23 | 0.23 mg/l |
| 20 Jun 2024, 12:02 | 0.29 | 0.29 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
740 µS/cm
Sampled 8 Oct 2025, 12 months ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Oct 2025, 13:40 | 740 | 740 µS/cm |
| 16 Sep 2025, 12:58 | 663 | 663 µS/cm |
| 1 Aug 2025, 11:18 | 933 | 933 µS/cm |
| 1 Jul 2025, 09:24 | 964 | 964 µS/cm |
| 3 Jun 2025, 11:14 | 729 | 729 µS/cm |
| 1 May 2025, 09:55 | 1034 | 1034 µS/cm |
| 9 Apr 2025, 12:49 | 1043 | 1043 µS/cm |
| 26 Mar 2025, 10:46 | 979 | 979 µS/cm |
| 5 Feb 2025, 13:58 | 834 | 834 µS/cm |
| 21 Jan 2025, 11:48 | 833 | 833 µS/cm |
| 3 Dec 2024, 10:50 | 658 | 658 µS/cm |
| 18 Nov 2024, 12:01 | 706 | 706 µS/cm |
| 23 Oct 2024, 09:26 | 717 | 717 µS/cm |
| 17 Sep 2024, 10:08 | 841 | 841 µS/cm |
| 22 Aug 2024, 12:52 | 871 | 871 µS/cm |
| 19 Jul 2024, 11:38 | 679 | 679 µS/cm |
| 20 Jun 2024, 12:02 | 915 | 915 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 17 | Jun 2024 – Oct 2025 | 102.7% 8 Oct 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 17 | Jun 2024 – Oct 2025 | 10.2 mg/l 8 Oct 2025 |
| Temperature of Water 0076 | River water | 17 | Jun 2024 – Oct 2025 | 15.7 °C 8 Oct 2025 |
| pH 0061 | River water | 20 | Dec 2023 – Oct 2025 | 7.85 8 Oct 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 16 | Jun 2024 – Oct 2025 | 0.057 mg/l 8 Oct 2025 |
| Nitrate as N 0117 | River water | 16 | Jun 2024 – Oct 2025 | 18 mg/l 8 Oct 2025 |
| Orthophosphate, reactive as P 0180 | River water | 16 | Jun 2024 – Oct 2025 | 0.21 mg/l 8 Oct 2025 |
| Conductivity at 25 C 0077 | River water | 17 | Jun 2024 – Oct 2025 | 740 µS/cm 8 Oct 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 16 | Jun 2024 – Oct 2025 | 110 mg/l 8 Oct 2025 |
| Ammonia un-ionised as N 0119 | River water | 16 | Jun 2024 – Oct 2025 | 0.00112 mg/l 8 Oct 2025 |
| BOD : 5 Day ATU 0085 | River water | 15 | Jun 2024 – Oct 2025 | below 6 mg/l 8 Oct 2025 |
| Calcium, Dissolved 0239 | River water | 5 | Dec 2023 – Oct 2024 | 75 mg/l 23 Oct 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 5 | Dec 2023 – Oct 2024 | 6.5 mg/l 23 Oct 2024 |
| Copper : BLM Bioavailable 4821 | River water | 5 | Dec 2023 – Oct 2024 | 0.08 µg/l 23 Oct 2024 |
| Copper, Dissolved 6450 | River water | 5 | Dec 2023 – Oct 2024 | 2.4 µg/l 23 Oct 2024 |
| Iron, Dissolved 6460 | River water | 5 | Dec 2023 – Oct 2024 | 110 µg/l 23 Oct 2024 |
| Nitrite as N 0118 | River water | 16 | Jun 2024 – Oct 2025 | 0.021 mg/l 8 Oct 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 16 | Jun 2024 – Oct 2025 | 18 mg/l 8 Oct 2025 |
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.