600 m downstream of Thirlmere Dam
EA name: 600M D/S THIRLMERE DAM (also listed as “600M D/S THIRLMERE DAM - ST JOHNS BECK”)
Environment Agency sampling point NW-88023211 · 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
- 6 May 2026, 13:155 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 31 Oct 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 331090, 519492As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- St John's BeckPlaced by position alone (the only river line close by), 5 m from the line.
- Next gauge downstream
- Thirlmere On the St Johns Beck · 0.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
105.2%
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 105.2 | 105.2% |
| 18 Mar 2026, 14:19 | 100.9 | 100.9% |
| 27 Oct 2025, 11:48 | 99.5 | 99.5% |
| 24 Sep 2025, 15:55 | 93.2 | 93.2% |
| 21 Mar 2025, 11:32 | 110.1 | 110.1% |
| 27 Feb 2025, 11:00 | 100.6 | 100.6% |
| 12 Feb 2025, 11:41 | 99.8 | 99.8% |
| 28 Jan 2025, 09:52 | 100.4 | 100.4% |
| 9 Dec 2024, 13:11 | 97.6 | 97.6% |
| 20 Nov 2024, 14:39 | 98.4 | 98.4% |
| 14 Oct 2024, 14:21 | 96 | 96% |
| 21 Aug 2024, 15:17 | 100.9 | 100.9% |
| 16 Jul 2024, 15:57 | 96 | 96% |
| 21 Jun 2024, 15:04 | 104.3 | 104.3% |
| 15 May 2024, 18:34 | 100.5 | 100.5% |
| 26 Apr 2024, 10:03 | 102.6 | 102.6% |
| 18 Mar 2024, 11:58 | 102.5 | 102.5% |
| 26 Feb 2024, 11:01 | 99.5 | 99.5% |
| 29 Jan 2024, 10:20 | 98.1 | 98.1% |
| 15 Dec 2023, 13:20 | 99.5 | 99.5% |
| 21 Nov 2023, 15:04 | 98 | 98% |
| 31 Oct 2023, 10:18 | 101.6 | 101.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.6 mg/l
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 11.6 | 11.6 mg/l |
| 18 Mar 2026, 14:19 | 12.3 | 12.3 mg/l |
| 27 Oct 2025, 11:48 | 11 | 11 mg/l |
| 24 Sep 2025, 15:55 | 9.8 | 9.8 mg/l |
| 21 Mar 2025, 11:32 | 13.1 | 13.1 mg/l |
| 27 Feb 2025, 11:00 | 12.7 | 12.7 mg/l |
| 12 Feb 2025, 11:41 | 12.9 | 12.9 mg/l |
| 28 Jan 2025, 09:52 | 12.8 | 12.8 mg/l |
| 9 Dec 2024, 13:11 | 11.8 | 11.8 mg/l |
| 20 Nov 2024, 14:39 | 11.8 | 11.8 mg/l |
| 14 Oct 2024, 14:21 | 10.5 | 10.5 mg/l |
| 21 Aug 2024, 15:17 | 10 | 10 mg/l |
| 16 Jul 2024, 15:57 | 9.78 | 9.78 mg/l |
| 21 Jun 2024, 15:04 | 10.6 | 10.6 mg/l |
| 15 May 2024, 18:34 | 11.1 | 11.1 mg/l |
| 26 Apr 2024, 10:03 | 12.1 | 12.1 mg/l |
| 18 Mar 2024, 11:58 | 12.4 | 12.4 mg/l |
| 26 Feb 2024, 11:01 | 12.4 | 12.4 mg/l |
| 29 Jan 2024, 10:20 | 12.4 | 12.4 mg/l |
| 15 Dec 2023, 13:20 | 12.2 | 12.2 mg/l |
| 21 Nov 2023, 15:04 | 11.3 | 11.3 mg/l |
| 31 Oct 2023, 10:18 | 11.2 | 11.2 mg/l |
Water temperature
code 0076 · °C
11 °C
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 11 | 11 °C |
| 18 Mar 2026, 14:19 | 6.7 | 6.7 °C |
| 27 Oct 2025, 11:48 | 10.7 | 10.7 °C |
| 24 Sep 2025, 15:55 | 13 | 13 °C |
| 21 Mar 2025, 11:32 | 7.8 | 7.8 °C |
| 27 Feb 2025, 11:00 | 5.4 | 5.4 °C |
| 12 Feb 2025, 11:41 | 4.4 | 4.4 °C |
| 28 Jan 2025, 09:52 | 4.9 | 4.9 °C |
| 9 Dec 2024, 13:11 | 7.2 | 7.2 °C |
| 20 Nov 2024, 14:39 | 7.5 | 7.5 °C |
| 14 Oct 2024, 14:21 | 11.1 | 11.1 °C |
| 21 Aug 2024, 15:17 | 15.6 | 15.6 °C |
| 16 Jul 2024, 15:57 | 14.4 | 14.4 °C |
| 21 Jun 2024, 15:04 | 14.6 | 14.6 °C |
| 15 May 2024, 18:34 | 10.9 | 10.9 °C |
| 26 Apr 2024, 10:03 | 8.2 | 8.2 °C |
| 18 Mar 2024, 11:58 | 7 | 7 °C |
| 26 Feb 2024, 11:01 | 5.8 | 5.8 °C |
| 29 Jan 2024, 10:20 | 5.4 | 5.4 °C |
| 15 Dec 2023, 13:20 | 6.5 | 6.5 °C |
| 21 Nov 2023, 15:04 | 8.9 | 8.9 °C |
| 31 Oct 2023, 10:18 | 11 | 11 °C |
pH
code 0061
7.74
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 7.74 | 7.74 |
| 18 Mar 2026, 14:19 | 7.24 | 7.24 |
| 27 Oct 2025, 11:48 | 7.52 | 7.52 |
| 24 Sep 2025, 15:55 | 6.84 | 6.84 |
| 21 Mar 2025, 11:32 | 6.99 | 6.99 |
| 27 Feb 2025, 11:00 | 6.95 | 6.95 |
| 12 Feb 2025, 11:41 | 6.92 | 6.92 |
| 28 Jan 2025, 09:52 | 7.06 | 7.06 |
| 9 Dec 2024, 13:11 | 6.67 | 6.67 |
| 20 Nov 2024, 14:39 | 7.12 | 7.12 |
| 14 Oct 2024, 14:21 | 7.06 | 7.06 |
| 21 Aug 2024, 15:17 | 6.86 | 6.86 |
| 16 Jul 2024, 15:57 | 6.92 | 6.92 |
| 21 Jun 2024, 15:04 | 7.33 | 7.33 |
| 15 May 2024, 18:34 | 6.86 | 6.86 |
| 26 Apr 2024, 10:03 | 6.74 | 6.74 |
| 18 Mar 2024, 11:58 | 7.17 | 7.17 |
| 26 Feb 2024, 11:01 | 7.46 | 7.46 |
| 29 Jan 2024, 10:20 | 6.95 | 6.95 |
| 15 Dec 2023, 13:20 | 6.97 | 6.97 |
| 21 Nov 2023, 15:04 | 6.88 | 6.88 |
| 31 Oct 2023, 10:18 | 6.99 | 6.99 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.0053 mg/l
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 0.0053 | 0.0053 mg/l |
| 18 Mar 2026, 14:19 | 0.0042 | 0.0042 mg/l |
| 27 Oct 2025, 11:48 | 0.0051 | 0.0051 mg/l |
| 24 Sep 2025, 15:55 | 0.0066 | 0.0066 mg/l |
| 21 Mar 2025, 11:32 | <0.002 | below 0.002 mg/l (not detected above this) |
| 27 Feb 2025, 11:00 | <0.002 | below 0.002 mg/l (not detected above this) |
| 12 Feb 2025, 11:41 | 0.002 | 0.002 mg/l |
| 28 Jan 2025, 09:52 | <0.002 | below 0.002 mg/l (not detected above this) |
| 9 Dec 2024, 13:11 | 0.024 | 0.024 mg/l |
| 20 Nov 2024, 14:39 | 0.0093 | 0.0093 mg/l |
| 14 Oct 2024, 14:21 | 0.0092 | 0.0092 mg/l |
| 21 Aug 2024, 15:17 | 0.012 | 0.012 mg/l |
| 16 Jul 2024, 15:57 | 0.0099 | 0.0099 mg/l |
| 21 Jun 2024, 15:04 | <0.002 | below 0.002 mg/l (not detected above this) |
| 15 May 2024, 18:34 | 0.0098 | 0.0098 mg/l |
| 26 Apr 2024, 10:03 | 0.0047 | 0.0047 mg/l |
| 18 Mar 2024, 11:58 | <0.002 | below 0.002 mg/l (not detected above this) |
| 26 Feb 2024, 11:01 | 0.014 | 0.014 mg/l |
| 29 Jan 2024, 10:20 | 0.0043 | 0.0043 mg/l |
| 15 Dec 2023, 13:20 | 0.0072 | 0.0072 mg/l |
| 21 Nov 2023, 15:04 | 0.0075 | 0.0075 mg/l |
| 31 Oct 2023, 10:18 | 0.011 | 0.011 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.199 mg/l
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 0.199 | 0.199 mg/l |
| 18 Mar 2026, 14:19 | 0.219 | 0.219 mg/l |
| 27 Oct 2025, 11:48 | 0.179 | 0.179 mg/l |
| 24 Sep 2025, 15:55 | 0.249 | 0.249 mg/l |
| 21 Mar 2025, 11:32 | 0.269 | 0.269 mg/l |
| 27 Feb 2025, 11:00 | 0.379 | 0.379 mg/l |
| 12 Feb 2025, 11:41 | 0.299 | 0.299 mg/l |
| 28 Jan 2025, 09:52 | 0.419 | 0.419 mg/l |
| 9 Dec 2024, 13:11 | 0.369 | 0.369 mg/l |
| 20 Nov 2024, 14:39 | 0.169 | 0.169 mg/l |
| 14 Oct 2024, 14:21 | 0.139 | 0.139 mg/l |
| 21 Aug 2024, 15:17 | 0.119 | 0.119 mg/l |
| 16 Jul 2024, 15:57 | 0.189 | 0.189 mg/l |
| 21 Jun 2024, 15:04 | 0.169 | 0.169 mg/l |
| 15 May 2024, 18:34 | 0.209 | 0.209 mg/l |
| 26 Apr 2024, 10:03 | 0.209 | 0.209 mg/l |
| 18 Mar 2024, 11:58 | 0.199 | 0.199 mg/l |
| 26 Feb 2024, 11:01 | 0.219 | 0.219 mg/l |
| 29 Jan 2024, 10:20 | 0.239 | 0.239 mg/l |
| 15 Dec 2023, 13:20 | 0.189 | 0.189 mg/l |
| 21 Nov 2023, 15:04 | 0.189 | 0.189 mg/l |
| 31 Oct 2023, 10:18 | 0.129 | 0.129 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.0029 mg/l
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 0.0029 | 0.0029 mg/l |
| 18 Mar 2026, 14:19 | <0.001 | below 0.001 mg/l (not detected above this) |
| 27 Oct 2025, 11:48 | <0.001 | below 0.001 mg/l (not detected above this) |
| 24 Sep 2025, 15:55 | <0.001 | below 0.001 mg/l (not detected above this) |
| 21 Mar 2025, 11:32 | <0.001 | below 0.001 mg/l (not detected above this) |
| 27 Feb 2025, 11:00 | <0.001 | below 0.001 mg/l (not detected above this) |
| 12 Feb 2025, 11:41 | 0.001 | 0.001 mg/l |
| 28 Jan 2025, 09:52 | 0.0012 | 0.0012 mg/l |
| 9 Dec 2024, 13:11 | <0.001 | below 0.001 mg/l (not detected above this) |
| 20 Nov 2024, 14:39 | <0.001 | below 0.001 mg/l (not detected above this) |
| 14 Oct 2024, 14:21 | <0.001 | below 0.001 mg/l (not detected above this) |
| 21 Aug 2024, 15:17 | <0.001 | below 0.001 mg/l (not detected above this) |
| 16 Jul 2024, 15:57 | <0.001 | below 0.001 mg/l (not detected above this) |
| 21 Jun 2024, 15:04 | 0.0013 | 0.0013 mg/l |
| 15 May 2024, 18:34 | <0.001 | below 0.001 mg/l (not detected above this) |
| 26 Apr 2024, 10:03 | <0.001 | below 0.001 mg/l (not detected above this) |
| 18 Mar 2024, 11:58 | <0.001 | below 0.001 mg/l (not detected above this) |
| 26 Feb 2024, 11:01 | <0.001 | below 0.001 mg/l (not detected above this) |
| 29 Jan 2024, 10:20 | <0.001 | below 0.001 mg/l (not detected above this) |
| 15 Dec 2023, 13:20 | <0.001 | below 0.001 mg/l (not detected above this) |
| 21 Nov 2023, 15:04 | <0.001 | below 0.001 mg/l (not detected above this) |
| 31 Oct 2023, 10:18 | <0.001 | below 0.001 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
33 µS/cm
Sampled 6 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 May 2026, 13:15 | 33 | 33 µS/cm |
| 18 Mar 2026, 14:19 | 29 | 29 µS/cm |
| 27 Oct 2025, 11:48 | 36 | 36 µS/cm |
| 24 Sep 2025, 15:55 | 43 | 43 µS/cm |
| 21 Mar 2025, 11:32 | 36 | 36 µS/cm |
| 27 Feb 2025, 11:00 | 46 | 46 µS/cm |
| 12 Feb 2025, 11:41 | 36 | 36 µS/cm |
| 28 Jan 2025, 09:52 | 50 | 50 µS/cm |
| 9 Dec 2024, 13:11 | 47 | 47 µS/cm |
| 20 Nov 2024, 14:39 | 32 | 32 µS/cm |
| 14 Oct 2024, 14:21 | 31 | 31 µS/cm |
| 21 Aug 2024, 15:17 | 31 | 31 µS/cm |
| 16 Jul 2024, 15:57 | 34 | 34 µS/cm |
| 21 Jun 2024, 15:04 | 34 | 34 µS/cm |
| 15 May 2024, 18:34 | 35 | 35 µS/cm |
| 26 Apr 2024, 10:03 | 31 | 31 µS/cm |
| 18 Mar 2024, 11:58 | 31 | 31 µS/cm |
| 26 Feb 2024, 11:01 | 32 | 32 µS/cm |
| 29 Jan 2024, 10:20 | 34 | 34 µS/cm |
| 15 Dec 2023, 13:20 | 30 | 30 µS/cm |
| 21 Nov 2023, 15:04 | 32 | 32 µS/cm |
| 31 Oct 2023, 10:18 | 30 | 30 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Oct 2023 – May 2026 | 105.2% 6 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Oct 2023 – May 2026 | 11.6 mg/l 6 May 2026 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – May 2026 | 11 °C 6 May 2026 |
| pH 0061 | River water | 22 | Oct 2023 – May 2026 | 7.74 6 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – May 2026 | 0.0053 mg/l 6 May 2026 |
| Nitrate as N 0117 | River water | 22 | Oct 2023 – May 2026 | 0.199 mg/l 6 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Oct 2023 – May 2026 | 0.0029 mg/l 6 May 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – May 2026 | 33 µS/cm 6 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – May 2026 | 11 mg/l 6 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – May 2026 | 0.00006 mg/l 6 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 17 | Feb 2024 – May 2026 | 1.3 mg/l 6 May 2026 |
| Nitrite as N 0118 | River water | 22 | Oct 2023 – May 2026 | below 0.001 mg/l 6 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Oct 2023 – May 2026 | 0.2 mg/l 6 May 2026 |
| Phosphorus, Total as P 0348 | River water | 15 | May 2024 – May 2026 | 0.0068 mg/l 6 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.