Nidd below Knaresborough sewage treatment works
EA name: NIDD BELOW KNARESBOROUGH STW
Environment Agency sampling point NE-49800103 · 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
- 18 Mar 2026, 11:116 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 7 Jun 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 436808, 455864As published, to the nearest 1 m. Open in a map
- River, by its own name
- Nidd
- River, by the map
- River NiddPlaced on the river its name gives, 10 m from the line.
- Next gauge downstream
- Hunsingore On the River Nidd · 12 km along the river
- Nearest gauge upstream
- Birstwith On the River Nidd · 22 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100.5%
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 100.5 | 100.5% |
| 6 Feb 2026, 11:20 | 102.3 | 102.3% |
| 13 Jan 2026, 12:49 | 100.5 | 100.5% |
| 8 Dec 2025, 13:16 | 100.4 | 100.4% |
| 6 Nov 2025, 10:28 | 96.3 | 96.3% |
| 20 Oct 2025, 13:23 | 97.3 | 97.3% |
| 30 Sep 2025, 14:07 | 96.7 | 96.7% |
| 29 Aug 2025, 13:49 | 101 | 101% |
| 4 Jul 2025, 11:26 | 98.1 | 98.1% |
| 10 Jun 2025, 13:22 | 91.7 | 91.7% |
| 27 May 2025, 10:47 | 85.8 | 85.8% |
| 4 Apr 2025, 11:26 | 99.9 | 99.9% |
| 5 Mar 2025, 10:50 | 100.5 | 100.5% |
| 5 Feb 2025, 14:30 | 95.9 | 95.9% |
| 3 Jan 2025, 14:40 | 100.3 | 100.3% |
| 4 Dec 2024, 11:24 | 99.6 | 99.6% |
| 4 Nov 2024, 10:29 | 96.7 | 96.7% |
| 7 Oct 2024, 10:59 | 97.6 | 97.6% |
| 10 Sep 2024, 09:58 | 93.5 | 93.5% |
| 1 Aug 2024, 12:26 | 114 | 114% |
| 4 Jul 2024, 13:18 | 111.7 | 111.7% |
| 7 Jun 2024, 11:26 | 95.3 | 95.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.7 mg/l
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 11.7 | 11.7 mg/l |
| 6 Feb 2026, 11:20 | 13 | 13 mg/l |
| 13 Jan 2026, 12:49 | 12.8 | 12.8 mg/l |
| 8 Dec 2025, 13:16 | 12 | 12 mg/l |
| 6 Nov 2025, 10:28 | 10.6 | 10.6 mg/l |
| 20 Oct 2025, 13:23 | 10.6 | 10.6 mg/l |
| 30 Sep 2025, 14:07 | 10.4 | 10.4 mg/l |
| 29 Aug 2025, 13:49 | 9.78 | 9.78 mg/l |
| 4 Jul 2025, 11:26 | 9.23 | 9.23 mg/l |
| 10 Jun 2025, 13:22 | 9.18 | 9.18 mg/l |
| 27 May 2025, 10:47 | 8.76 | 8.76 mg/l |
| 4 Apr 2025, 11:26 | 11.2 | 11.2 mg/l |
| 5 Mar 2025, 10:50 | 12.2 | 12.2 mg/l |
| 5 Feb 2025, 14:30 | 12 | 12 mg/l |
| 3 Jan 2025, 14:40 | 13.1 | 13.1 mg/l |
| 4 Dec 2024, 11:24 | 12.5 | 12.5 mg/l |
| 4 Nov 2024, 10:29 | 10.7 | 10.7 mg/l |
| 7 Oct 2024, 10:59 | 10.7 | 10.7 mg/l |
| 10 Sep 2024, 09:58 | 9.42 | 9.42 mg/l |
| 1 Aug 2024, 12:26 | 10.4 | 10.4 mg/l |
| 4 Jul 2024, 13:18 | 11.1 | 11.1 mg/l |
| 7 Jun 2024, 11:26 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
8.7 °C
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 8.7 | 8.7 °C |
| 6 Feb 2026, 11:20 | 5 | 5 °C |
| 13 Jan 2026, 12:49 | 5.1 | 5.1 °C |
| 8 Dec 2025, 13:16 | 7.5 | 7.5 °C |
| 6 Nov 2025, 10:28 | 10.8 | 10.8 °C |
| 20 Oct 2025, 13:23 | 11.6 | 11.6 °C |
| 30 Sep 2025, 14:07 | 12.2 | 12.2 °C |
| 29 Aug 2025, 13:49 | 16.8 | 16.8 °C |
| 4 Jul 2025, 11:26 | 18.2 | 18.2 °C |
| 10 Jun 2025, 13:22 | 15.2 | 15.2 °C |
| 27 May 2025, 10:47 | 14.3 | 14.3 °C |
| 4 Apr 2025, 11:26 | 10.2 | 10.2 °C |
| 5 Mar 2025, 10:50 | 6.8 | 6.8 °C |
| 5 Feb 2025, 14:30 | 5.9 | 5.9 °C |
| 3 Jan 2025, 14:40 | 4.1 | 4.1 °C |
| 4 Dec 2024, 11:24 | 5.6 | 5.6 °C |
| 4 Nov 2024, 10:29 | 10.7 | 10.7 °C |
| 7 Oct 2024, 10:59 | 11.2 | 11.2 °C |
| 10 Sep 2024, 09:58 | 14.9 | 14.9 °C |
| 1 Aug 2024, 12:26 | 19.7 | 19.7 °C |
| 4 Jul 2024, 13:18 | 15.6 | 15.6 °C |
| 7 Jun 2024, 11:26 | 13 | 13 °C |
pH
code 0061
7.56
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 7.56 | 7.56 |
| 6 Feb 2026, 11:20 | 7.74 | 7.74 |
| 13 Jan 2026, 12:49 | 7.86 | 7.86 |
| 8 Dec 2025, 13:16 | 7.4 | 7.4 |
| 6 Nov 2025, 10:28 | 7.57 | 7.57 |
| 20 Oct 2025, 13:23 | 7.52 | 7.52 |
| 30 Sep 2025, 14:07 | 7.48 | 7.48 |
| 29 Aug 2025, 13:49 | 7.48 | 7.48 |
| 4 Jul 2025, 11:26 | 7.78 | 7.78 |
| 10 Jun 2025, 13:22 | 7.57 | 7.57 |
| 27 May 2025, 10:47 | 7.58 | 7.58 |
| 4 Apr 2025, 11:26 | 7.82 | 7.82 |
| 5 Mar 2025, 10:50 | 7.79 | 7.79 |
| 5 Feb 2025, 14:30 | 7.7 | 7.7 |
| 3 Jan 2025, 14:40 | 7.62 | 7.62 |
| 4 Dec 2024, 11:24 | 7.55 | 7.55 |
| 4 Nov 2024, 10:29 | 7.91 | 7.91 |
| 7 Oct 2024, 10:59 | 7.45 | 7.45 |
| 10 Sep 2024, 09:58 | 7.7 | 7.7 |
| 1 Aug 2024, 12:26 | 7.99 | 7.99 |
| 4 Jul 2024, 13:18 | 8.04 | 8.04 |
| 7 Jun 2024, 11:26 | 7.75 | 7.75 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.087 mg/l
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 0.087 | 0.087 mg/l |
| 6 Feb 2026, 11:20 | 0.29 | 0.29 mg/l |
| 13 Jan 2026, 12:49 | 0.22 | 0.22 mg/l |
| 8 Dec 2025, 13:16 | 0.032 | 0.032 mg/l |
| 6 Nov 2025, 10:28 | 0.057 | 0.057 mg/l |
| 20 Oct 2025, 13:23 | 0.062 | 0.062 mg/l |
| 30 Sep 2025, 14:07 | 0.12 | 0.12 mg/l |
| 29 Aug 2025, 13:49 | 0.067 | 0.067 mg/l |
| 4 Jul 2025, 11:26 | 0.1 | 0.1 mg/l |
| 10 Jun 2025, 13:22 | 0.15 | 0.15 mg/l |
| 27 May 2025, 10:47 | 0.37 | 0.37 mg/l |
| 4 Apr 2025, 11:26 | 0.13 | 0.13 mg/l |
| 5 Mar 2025, 10:50 | 0.068 | 0.068 mg/l |
| 5 Feb 2025, 14:30 | 0.19 | 0.19 mg/l |
| 3 Jan 2025, 14:40 | 0.073 | 0.073 mg/l |
| 4 Dec 2024, 11:24 | 0.12 | 0.12 mg/l |
| 4 Nov 2024, 10:29 | 0.25 | 0.25 mg/l |
| 7 Oct 2024, 10:59 | 0.13 | 0.13 mg/l |
| 10 Sep 2024, 09:58 | 0.21 | 0.21 mg/l |
| 1 Aug 2024, 12:26 | 0.066 | 0.066 mg/l |
| 4 Jul 2024, 13:18 | 0.048 | 0.048 mg/l |
| 7 Jun 2024, 11:26 | 0.11 | 0.11 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.48 mg/l
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 1.48 | 1.48 mg/l |
| 6 Feb 2026, 11:20 | 2.48 | 2.48 mg/l |
| 13 Jan 2026, 12:49 | 2.77 | 2.77 mg/l |
| 8 Dec 2025, 13:16 | 1.6 | 1.6 mg/l |
| 6 Nov 2025, 10:28 | 1.48 | 1.48 mg/l |
| 20 Oct 2025, 13:23 | 2.07 | 2.07 mg/l |
| 30 Sep 2025, 14:07 | 1.77 | 1.77 mg/l |
| 29 Aug 2025, 13:49 | 3.17 | 3.17 mg/l |
| 4 Jul 2025, 11:26 | 3.45 | 3.45 mg/l |
| 10 Jun 2025, 13:22 | 2.73 | 2.73 mg/l |
| 27 May 2025, 10:47 | 2.64 | 2.64 mg/l |
| 4 Apr 2025, 11:26 | 3.75 | 3.75 mg/l |
| 5 Mar 2025, 10:50 | 2.48 | 2.48 mg/l |
| 5 Feb 2025, 14:30 | 2.47 | 2.47 mg/l |
| 3 Jan 2025, 14:40 | 2.09 | 2.09 mg/l |
| 4 Dec 2024, 11:24 | 2.18 | 2.18 mg/l |
| 4 Nov 2024, 10:29 | 1.82 | 1.82 mg/l |
| 7 Oct 2024, 10:59 | 1.77 | 1.77 mg/l |
| 10 Sep 2024, 09:58 | 4.06 | 4.06 mg/l |
| 1 Aug 2024, 12:26 | 3.07 | 3.07 mg/l |
| 4 Jul 2024, 13:18 | 3.34 | 3.34 mg/l |
| 7 Jun 2024, 11:26 | 2.57 | 2.57 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.041 mg/l
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 0.041 | 0.041 mg/l |
| 6 Feb 2026, 11:20 | 0.052 | 0.052 mg/l |
| 13 Jan 2026, 12:49 | 0.067 | 0.067 mg/l |
| 8 Dec 2025, 13:16 | 0.026 | 0.026 mg/l |
| 6 Nov 2025, 10:28 | 0.059 | 0.059 mg/l |
| 20 Oct 2025, 13:23 | 0.11 | 0.11 mg/l |
| 30 Sep 2025, 14:07 | 0.12 | 0.12 mg/l |
| 29 Aug 2025, 13:49 | 0.34 | 0.34 mg/l |
| 4 Jul 2025, 11:26 | 0.42 | 0.42 mg/l |
| 10 Jun 2025, 13:22 | 0.27 | 0.27 mg/l |
| 27 May 2025, 10:47 | 0.41 | 0.41 mg/l |
| 4 Apr 2025, 11:26 | 0.16 | 0.16 mg/l |
| 5 Mar 2025, 10:50 | 0.076 | 0.076 mg/l |
| 5 Feb 2025, 14:30 | 0.09 | 0.09 mg/l |
| 3 Jan 2025, 14:40 | 0.053 | 0.053 mg/l |
| 4 Dec 2024, 11:24 | 0.075 | 0.075 mg/l |
| 4 Nov 2024, 10:29 | 0.046 | 0.046 mg/l |
| 7 Oct 2024, 10:59 | 0.083 | 0.083 mg/l |
| 10 Sep 2024, 09:58 | 0.22 | 0.22 mg/l |
| 1 Aug 2024, 12:26 | 0.23 | 0.23 mg/l |
| 4 Jul 2024, 13:18 | 0.21 | 0.21 mg/l |
| 7 Jun 2024, 11:26 | 0.15 | 0.15 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
147 µS/cm
Sampled 18 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Mar 2026, 11:11 | 147 | 147 µS/cm |
| 6 Feb 2026, 11:20 | 248 | 248 µS/cm |
| 13 Jan 2026, 12:49 | 242 | 242 µS/cm |
| 8 Dec 2025, 13:16 | 132 | 132 µS/cm |
| 6 Nov 2025, 10:28 | 177 | 177 µS/cm |
| 20 Oct 2025, 13:23 | 228 | 228 µS/cm |
| 30 Sep 2025, 14:07 | 195 | 195 µS/cm |
| 29 Aug 2025, 13:49 | 351 | 351 µS/cm |
| 4 Jul 2025, 11:26 | 343 | 343 µS/cm |
| 10 Jun 2025, 13:22 | 288 | 288 µS/cm |
| 27 May 2025, 10:47 | 424 | 424 µS/cm |
| 4 Apr 2025, 11:26 | 313 | 313 µS/cm |
| 5 Mar 2025, 10:50 | 236 | 236 µS/cm |
| 5 Feb 2025, 14:30 | 217 | 217 µS/cm |
| 3 Jan 2025, 14:40 | 177 | 177 µS/cm |
| 4 Dec 2024, 11:24 | 216 | 216 µS/cm |
| 4 Nov 2024, 10:29 | 198 | 198 µS/cm |
| 7 Oct 2024, 10:59 | 179 | 179 µS/cm |
| 10 Sep 2024, 09:58 | 315 | 315 µS/cm |
| 1 Aug 2024, 12:26 | 322 | 322 µS/cm |
| 4 Jul 2024, 13:18 | 329 | 329 µS/cm |
| 7 Jun 2024, 11:26 | 272 | 272 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Jun 2024 – Mar 2026 | 100.5% 18 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jun 2024 – Mar 2026 | 11.7 mg/l 18 Mar 2026 |
| Temperature of Water 0076 | River water | 22 | Jun 2024 – Mar 2026 | 8.7 °C 18 Mar 2026 |
| pH 0061 | River water | 22 | Jun 2024 – Mar 2026 | 7.56 18 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Jun 2024 – Mar 2026 | 0.087 mg/l 18 Mar 2026 |
| Nitrate as N 0117 | River water | 22 | Jun 2024 – Mar 2026 | 1.48 mg/l 18 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jun 2024 – Mar 2026 | 0.041 mg/l 18 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Jun 2024 – Mar 2026 | 147 µS/cm 18 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Jun 2024 – Mar 2026 | 39 mg/l 18 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jun 2024 – Mar 2026 | 0.00053 mg/l 18 Mar 2026 |
| Nitrite as N 0118 | River water | 22 | Jun 2024 – Mar 2026 | 0.024 mg/l 18 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jun 2024 – Mar 2026 | 1.5 mg/l 18 Mar 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.