Comb Gill above the confluence with River Derwent
EA name: COMB GILL PTC RIVER DERWENT
Environment Agency sampling point NW-88005536 · 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
- 2 Jun 2026, 13:284 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 30 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 325451, 513942As 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
- Not placedTwo watercourses within reach (6 m and 56 m) and no name to choose by. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.1%
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | 102.1 | 102.1% |
| 2 Feb 2026, 09:19 | 98 | 98% |
| 7 Oct 2025, 11:15 | 101.7 | 101.7% |
| 23 Jul 2025, 14:42 | 103.2 | 103.2% |
| 21 Mar 2025, 10:28 | 104.9 | 104.9% |
| 11 Feb 2025, 12:09 | 99.7 | 99.7% |
| 28 Jan 2025, 10:28 | 103.1 | 103.1% |
| 16 Dec 2024, 11:32 | 101.7 | 101.7% |
| 21 Nov 2024, 10:58 | 102.5 | 102.5% |
| 30 Oct 2024, 10:31 | 101.4 | 101.4% |
| 23 Sep 2024, 09:48 | 101.1 | 101.1% |
| 28 Aug 2024, 08:30 | 101.4 | 101.4% |
| 16 Jul 2024, 12:58 | 103.8 | 103.8% |
| 20 Jun 2024, 10:33 | 102.8 | 102.8% |
| 17 May 2024, 15:04 | 102.4 | 102.4% |
| 16 Apr 2024, 12:14 | 101.6 | 101.6% |
| 21 Mar 2024, 17:33 | 102.5 | 102.5% |
| 26 Feb 2024, 13:55 | 102.3 | 102.3% |
| 26 Jan 2024, 11:19 | 100 | 100% |
| 13 Dec 2023, 12:06 | 99.4 | 99.4% |
| 22 Nov 2023, 16:40 | 103.4 | 103.4% |
| 30 Oct 2023, 12:49 | 99.7 | 99.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.3 mg/l
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | 10.3 | 10.3 mg/l |
| 2 Feb 2026, 09:19 | 12.6 | 12.6 mg/l |
| 7 Oct 2025, 11:15 | 11 | 11 mg/l |
| 23 Jul 2025, 14:42 | 10.3 | 10.3 mg/l |
| 21 Mar 2025, 10:28 | 12.6 | 12.6 mg/l |
| 11 Feb 2025, 12:09 | 13.1 | 13.1 mg/l |
| 28 Jan 2025, 10:28 | 13.3 | 13.3 mg/l |
| 16 Dec 2024, 11:32 | 12.1 | 12.1 mg/l |
| 21 Nov 2024, 10:58 | 14.9 | 14.9 mg/l |
| 30 Oct 2024, 10:31 | 11.1 | 11.1 mg/l |
| 23 Sep 2024, 09:48 | 10.8 | 10.8 mg/l |
| 28 Aug 2024, 08:30 | 10.6 | 10.6 mg/l |
| 16 Jul 2024, 12:58 | 10.2 | 10.2 mg/l |
| 20 Jun 2024, 10:33 | 10.7 | 10.7 mg/l |
| 17 May 2024, 15:04 | 10.5 | 10.5 mg/l |
| 16 Apr 2024, 12:14 | 12 | 12 mg/l |
| 21 Mar 2024, 17:33 | 12.1 | 12.1 mg/l |
| 26 Feb 2024, 13:55 | 12.8 | 12.8 mg/l |
| 26 Jan 2024, 11:19 | 12.7 | 12.7 mg/l |
| 13 Dec 2023, 12:06 | 12.5 | 12.5 mg/l |
| 22 Nov 2023, 16:40 | 11.8 | 11.8 mg/l |
| 30 Oct 2023, 12:49 | 11.4 | 11.4 mg/l |
Water temperature
code 0076 · °C
15 °C
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | 15 | 15 °C |
| 2 Feb 2026, 09:19 | 4.6 | 4.6 °C |
| 7 Oct 2025, 11:15 | 11.6 | 11.6 °C |
| 23 Jul 2025, 14:42 | 15.4 | 15.4 °C |
| 21 Mar 2025, 10:28 | 7.4 | 7.4 °C |
| 11 Feb 2025, 12:09 | 4 | 4 °C |
| 28 Jan 2025, 10:28 | 4.7 | 4.7 °C |
| 16 Dec 2024, 11:32 | 7.7 | 7.7 °C |
| 21 Nov 2024, 10:58 | 0.2 | 0.2 °C |
| 30 Oct 2024, 10:31 | 11.1 | 11.1 °C |
| 23 Sep 2024, 09:48 | 12.2 | 12.2 °C |
| 28 Aug 2024, 08:30 | 13.2 | 13.2 °C |
| 16 Jul 2024, 12:58 | 16.1 | 16.1 °C |
| 20 Jun 2024, 10:33 | 13.5 | 13.5 °C |
| 17 May 2024, 15:04 | 14.1 | 14.1 °C |
| 16 Apr 2024, 12:14 | 8 | 8 °C |
| 21 Mar 2024, 17:33 | 8 | 8 °C |
| 26 Feb 2024, 13:55 | 5.6 | 5.6 °C |
| 26 Jan 2024, 11:19 | 5.3 | 5.3 °C |
| 13 Dec 2023, 12:06 | 5.7 | 5.7 °C |
| 22 Nov 2023, 16:40 | 9.4 | 9.4 °C |
| 30 Oct 2023, 12:49 | 9.2 | 9.2 °C |
pH
code 0061
7.16
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | 7.16 | 7.16 |
| 2 Feb 2026, 09:19 | 7.54 | 7.54 |
| 7 Oct 2025, 11:15 | 7.51 | 7.51 |
| 23 Jul 2025, 14:42 | 7.3 | 7.3 |
| 21 Mar 2025, 10:28 | 7.73 | 7.73 |
| 11 Feb 2025, 12:09 | 7.62 | 7.62 |
| 28 Jan 2025, 10:28 | 7.32 | 7.32 |
| 16 Dec 2024, 11:32 | 7.35 | 7.35 |
| 21 Nov 2024, 10:58 | 7.38 | 7.38 |
| 30 Oct 2024, 10:31 | 7.84 | 7.84 |
| 23 Sep 2024, 09:48 | 7.49 | 7.49 |
| 28 Aug 2024, 08:30 | 7.32 | 7.32 |
| 16 Jul 2024, 12:58 | 7.74 | 7.74 |
| 20 Jun 2024, 10:33 | 7.75 | 7.75 |
| 17 May 2024, 15:04 | 7.77 | 7.77 |
| 16 Apr 2024, 12:14 | 7.34 | 7.34 |
| 21 Mar 2024, 17:33 | 6.73 | 6.73 |
| 26 Feb 2024, 13:55 | 7.8 | 7.8 |
| 26 Jan 2024, 11:19 | 6.8 | 6.8 |
| 13 Dec 2023, 12:06 | 7.26 | 7.26 |
| 22 Nov 2023, 16:40 | 6.72 | 6.72 |
| 30 Oct 2023, 12:49 | 7.93 | 7.93 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.002 mg/l (not detected above this)
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | <0.002 | below 0.002 mg/l (not detected above this) |
| 2 Feb 2026, 09:19 | 0.0033 | 0.0033 mg/l |
| 7 Oct 2025, 11:15 | <0.002 | below 0.002 mg/l (not detected above this) |
| 23 Jul 2025, 14:42 | 0.013 | 0.013 mg/l |
| 21 Mar 2025, 10:28 | 0.0022 | 0.0022 mg/l |
| 11 Feb 2025, 12:09 | 0.0029 | 0.0029 mg/l |
| 28 Jan 2025, 10:28 | 0.0054 | 0.0054 mg/l |
| 16 Dec 2024, 11:32 | 0.0054 | 0.0054 mg/l |
| 21 Nov 2024, 10:58 | <0.002 | below 0.002 mg/l (not detected above this) |
| 30 Oct 2024, 10:31 | 0.0024 | 0.0024 mg/l |
| 23 Sep 2024, 09:48 | <0.002 | below 0.002 mg/l (not detected above this) |
| 28 Aug 2024, 08:30 | <0.002 | below 0.002 mg/l (not detected above this) |
| 16 Jul 2024, 12:58 | 0.0074 | 0.0074 mg/l |
| 20 Jun 2024, 10:33 | 0.0021 | 0.0021 mg/l |
| 17 May 2024, 15:04 | 0.0038 | 0.0038 mg/l |
| 16 Apr 2024, 12:14 | 0.002 | 0.002 mg/l |
| 21 Mar 2024, 17:33 | 0.014 | 0.014 mg/l |
| 26 Feb 2024, 13:55 | <0.002 | below 0.002 mg/l (not detected above this) |
| 26 Jan 2024, 11:19 | 0.0025 | 0.0025 mg/l |
| 13 Dec 2023, 12:06 | 0.003 | 0.003 mg/l |
| 22 Nov 2023, 16:40 | 0.056 | 0.056 mg/l |
| 30 Oct 2023, 12:49 | <0.002 | below 0.002 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.09 mg/l
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | 0.09 | 0.09 mg/l |
| 2 Feb 2026, 09:19 | 0.409 | 0.409 mg/l |
| 7 Oct 2025, 11:15 | 0.189 | 0.189 mg/l |
| 23 Jul 2025, 14:42 | 0.212 | 0.212 mg/l |
| 21 Mar 2025, 10:28 | 0.359 | 0.359 mg/l |
| 11 Feb 2025, 12:09 | 0.419 | 0.419 mg/l |
| 28 Jan 2025, 10:28 | 0.489 | 0.489 mg/l |
| 16 Dec 2024, 11:32 | 0.478 | 0.478 mg/l |
| 21 Nov 2024, 10:58 | 0.389 | 0.389 mg/l |
| 30 Oct 2024, 10:31 | 0.259 | 0.259 mg/l |
| 23 Sep 2024, 09:48 | 0.179 | 0.179 mg/l |
| 28 Aug 2024, 08:30 | 0.061 | 0.061 mg/l |
| 16 Jul 2024, 12:58 | 0.129 | 0.129 mg/l |
| 20 Jun 2024, 10:33 | 0.109 | 0.109 mg/l |
| 17 May 2024, 15:04 | 0.139 | 0.139 mg/l |
| 16 Apr 2024, 12:14 | 0.119 | 0.119 mg/l |
| 21 Mar 2024, 17:33 | 0.139 | 0.139 mg/l |
| 26 Feb 2024, 13:55 | 0.309 | 0.309 mg/l |
| 26 Jan 2024, 11:19 | 0.349 | 0.349 mg/l |
| 13 Dec 2023, 12:06 | 0.459 | 0.459 mg/l |
| 22 Nov 2023, 16:40 | 0.319 | 0.319 mg/l |
| 30 Oct 2023, 12:49 | 0.339 | 0.339 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.001 mg/l (not detected above this)
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | <0.001 | below 0.001 mg/l (not detected above this) |
| 2 Feb 2026, 09:19 | <0.001 | below 0.001 mg/l (not detected above this) |
| 7 Oct 2025, 11:15 | <0.001 | below 0.001 mg/l (not detected above this) |
| 23 Jul 2025, 14:42 | 0.0066 | 0.0066 mg/l |
| 21 Mar 2025, 10:28 | <0.001 | below 0.001 mg/l (not detected above this) |
| 11 Feb 2025, 12:09 | <0.001 | below 0.001 mg/l (not detected above this) |
| 28 Jan 2025, 10:28 | <0.001 | below 0.001 mg/l (not detected above this) |
| 16 Dec 2024, 11:32 | 0.0012 | 0.0012 mg/l |
| 21 Nov 2024, 10:58 | <0.001 | below 0.001 mg/l (not detected above this) |
| 30 Oct 2024, 10:31 | <0.001 | below 0.001 mg/l (not detected above this) |
| 23 Sep 2024, 09:48 | <0.001 | below 0.001 mg/l (not detected above this) |
| 28 Aug 2024, 08:30 | <0.001 | below 0.001 mg/l (not detected above this) |
| 16 Jul 2024, 12:58 | 0.003 | 0.003 mg/l |
| 20 Jun 2024, 10:33 | <0.001 | below 0.001 mg/l (not detected above this) |
| 17 May 2024, 15:04 | 0.0022 | 0.0022 mg/l |
| 16 Apr 2024, 12:14 | <0.001 | below 0.001 mg/l (not detected above this) |
| 21 Mar 2024, 17:33 | <0.001 | below 0.001 mg/l (not detected above this) |
| 26 Feb 2024, 13:55 | <0.001 | below 0.001 mg/l (not detected above this) |
| 26 Jan 2024, 11:19 | <0.001 | below 0.001 mg/l (not detected above this) |
| 13 Dec 2023, 12:06 | <0.001 | below 0.001 mg/l (not detected above this) |
| 22 Nov 2023, 16:40 | 0.07 | 0.07 mg/l |
| 30 Oct 2023, 12:49 | <0.001 | below 0.001 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
26 µS/cm
Sampled 2 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jun 2026, 13:28 | 26 | 26 µS/cm |
| 2 Feb 2026, 09:19 | 27 | 27 µS/cm |
| 7 Oct 2025, 11:15 | 35 | 35 µS/cm |
| 23 Jul 2025, 14:42 | 79 | 79 µS/cm |
| 21 Mar 2025, 10:28 | 40 | 40 µS/cm |
| 11 Feb 2025, 12:09 | 44 | 44 µS/cm |
| 28 Jan 2025, 10:28 | 54 | 54 µS/cm |
| 16 Dec 2024, 11:32 | 31 | 31 µS/cm |
| 21 Nov 2024, 10:58 | 41 | 41 µS/cm |
| 30 Oct 2024, 10:31 | 34 | 34 µS/cm |
| 23 Sep 2024, 09:48 | 35 | 35 µS/cm |
| 28 Aug 2024, 08:30 | 21 | 21 µS/cm |
| 16 Jul 2024, 12:58 | 35 | 35 µS/cm |
| 20 Jun 2024, 10:33 | 31 | 31 µS/cm |
| 17 May 2024, 15:04 | 32 | 32 µS/cm |
| 16 Apr 2024, 12:14 | 27 | 27 µS/cm |
| 21 Mar 2024, 17:33 | 25 | 25 µS/cm |
| 26 Feb 2024, 13:55 | 38 | 38 µS/cm |
| 26 Jan 2024, 11:19 | 39 | 39 µS/cm |
| 13 Dec 2023, 12:06 | 33 | 33 µS/cm |
| 22 Nov 2023, 16:40 | 52 | 52 µS/cm |
| 30 Oct 2023, 12:49 | 38 | 38 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 – Jun 2026 | 102.1% 2 Jun 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Oct 2023 – Jun 2026 | 10.3 mg/l 2 Jun 2026 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – Jun 2026 | 15 °C 2 Jun 2026 |
| pH 0061 | River water | 22 | Oct 2023 – Jun 2026 | 7.16 2 Jun 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – Jun 2026 | below 0.002 mg/l 2 Jun 2026 |
| Nitrate as N 0117 | River water | 22 | Oct 2023 – Jun 2026 | 0.09 mg/l 2 Jun 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Oct 2023 – Jun 2026 | below 0.001 mg/l 2 Jun 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – Jun 2026 | 26 µS/cm 2 Jun 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – Jun 2026 | below 8 mg/l 2 Jun 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Jun 2026 | below 0.00001 mg/l 2 Jun 2026 |
| BOD : 5 Day ATU 0085 | River water | 18 | Feb 2024 – Jun 2026 | below 1 mg/l 2 Jun 2026 |
| Nitrite as N 0118 | River water | 22 | Oct 2023 – Jun 2026 | below 0.001 mg/l 2 Jun 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Oct 2023 – Jun 2026 | 0.091 mg/l 2 Jun 2026 |
| Phosphorus, Total as P 0348 | River water | 15 | May 2024 – Jun 2026 | 0.0028 mg/l 2 Jun 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.