Blea Beck upstream of Grimwith Reservoir
EA name: BLEA BECK U/S GRIMWITH RESERVOIR
Environment Agency sampling point NE-49705101 · 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
- 5 May 2026, 12:265 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
- 6 since 11 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 405028, 465709As published, to the nearest 1 m. Open in a map
- River, by its own name
- Blea Beck
- River, by the map
- Blea BeckPlaced on the river its name gives, 23 m from the line.
- Next gauge downstream
- Addingham On the River Wharfe · 24 km along the river
- Why it was sampled
- Monitoring (national agency policy) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
105.3%
Sampled 5 May 2026, 5 months ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:26 | 105.3 | 105.3% |
| 27 Mar 2024, 12:14 | 101 | 101% |
| 31 Jan 2024, 11:28 | 102 | 102% |
| 13 Dec 2023, 13:11 | 102.4 | 102.4% |
| 22 Nov 2023, 10:47 | 101.2 | 101.2% |
| 11 Oct 2023, 12:19 | 104.2 | 104.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.1 mg/l
Sampled 5 May 2026, 5 months ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:26 | 12.1 | 12.1 mg/l |
| 27 Mar 2024, 12:14 | 12.5 | 12.5 mg/l |
| 31 Jan 2024, 11:28 | 13.4 | 13.4 mg/l |
| 13 Dec 2023, 13:11 | 13.2 | 13.2 mg/l |
| 22 Nov 2023, 10:47 | 12.2 | 12.2 mg/l |
| 11 Oct 2023, 12:19 | 11.1 | 11.1 mg/l |
Water temperature
code 0076 · °C
9.2 °C
Sampled 5 May 2026, 5 months ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:26 | 9.2 | 9.2 °C |
| 27 Mar 2024, 12:14 | 6.2 | 6.2 °C |
| 31 Jan 2024, 11:28 | 3.8 | 3.8 °C |
| 13 Dec 2023, 13:11 | 4.7 | 4.7 °C |
| 22 Nov 2023, 10:47 | 7.2 | 7.2 °C |
| 11 Oct 2023, 12:19 | 12.3 | 12.3 °C |
pH
code 0061
7.55
Sampled 5 May 2026, 5 months ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:26 | 7.55 | 7.55 |
| 27 Mar 2024, 12:14 | 6.6 | 6.6 |
| 31 Jan 2024, 11:28 | 5.9 | 5.9 |
| 13 Dec 2023, 13:11 | 5.9 | 5.9 |
| 22 Nov 2023, 10:47 | 6.2 | 6.2 |
| 11 Oct 2023, 12:19 | 5.9 | 5.9 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.0092 mg/l
Sampled 27 Mar 2024, 2.5 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2024, 12:14 | 0.0092 | 0.0092 mg/l |
| 31 Jan 2024, 11:28 | 0.015 | 0.015 mg/l |
| 13 Dec 2023, 13:11 | 0.013 | 0.013 mg/l |
| 22 Nov 2023, 10:47 | 0.013 | 0.013 mg/l |
| 11 Oct 2023, 12:19 | 0.0028 | 0.0028 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.089 mg/l
Sampled 27 Mar 2024, 2.5 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2024, 12:14 | 0.089 | 0.089 mg/l |
| 31 Jan 2024, 11:28 | 0.179 | 0.179 mg/l |
| 13 Dec 2023, 13:11 | 0.083 | 0.083 mg/l |
| 22 Nov 2023, 10:47 | 0.065 | 0.065 mg/l |
| 11 Oct 2023, 12:19 | 0.0266 | 0.0266 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.0035 mg/l
Sampled 27 Mar 2024, 2.5 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2024, 12:14 | 0.0035 | 0.0035 mg/l |
| 31 Jan 2024, 11:28 | 0.0048 | 0.0048 mg/l |
| 13 Dec 2023, 13:11 | 0.0053 | 0.0053 mg/l |
| 22 Nov 2023, 10:47 | 0.012 | 0.012 mg/l |
| 11 Oct 2023, 12:19 | 0.012 | 0.012 mg/l |
Turbidity
code 6396 · NTU
1.3 NTU
Sampled 27 Mar 2024, 2.5 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2024, 12:14 | 1.3 | 1.3 NTU |
| 31 Jan 2024, 11:28 | 1.9 | 1.9 NTU |
| 13 Dec 2023, 13:11 | 1.6 | 1.6 NTU |
| 22 Nov 2023, 10:47 | 1.9 | 1.9 NTU |
| 11 Oct 2023, 12:19 | 12 | 12 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
60 µS/cm
Sampled 5 May 2026, 5 months ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:26 | 60 | 60 µS/cm |
| 27 Mar 2024, 12:14 | 25 | 25 µS/cm |
| 31 Jan 2024, 11:28 | 41 | 41 µS/cm |
| 13 Dec 2023, 13:11 | 24 | 24 µS/cm |
| 22 Nov 2023, 10:47 | 32 | 32 µS/cm |
| 11 Oct 2023, 12:19 | 31 | 31 µS/cm |
Everything measured here
32 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 32 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 6 | Oct 2023 – May 2026 | 105.3% 5 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 6 | Oct 2023 – May 2026 | 12.1 mg/l 5 May 2026 |
| Temperature of Water 0076 | River water | 6 | Oct 2023 – May 2026 | 9.2 °C 5 May 2026 |
| pH 0061 | River water | 6 | Oct 2023 – May 2026 | 7.55 5 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 5 | Oct 2023 – Mar 2024 | 0.0092 mg/l 27 Mar 2024 |
| Nitrate as N 0117 | River water | 5 | Oct 2023 – Mar 2024 | 0.089 mg/l 27 Mar 2024 |
| Orthophosphate, reactive as P 0180 | River water | 5 | Oct 2023 – Mar 2024 | 0.0035 mg/l 27 Mar 2024 |
| Turbidity 6396 | River water | 5 | Oct 2023 – Mar 2024 | 1.3 NTU 27 Mar 2024 |
| Conductivity at 25 C 0077 | River water | 6 | Oct 2023 – May 2026 | 60 µS/cm 5 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 5 | Oct 2023 – Mar 2024 | below 5 mg/l 27 Mar 2024 |
| Ammonia un-ionised as N 0119 | River water | 5 | Oct 2023 – Mar 2024 | below 0.00001 mg/l 27 Mar 2024 |
| Cadmium, Dissolved 0106 | River water | 5 | Oct 2023 – Mar 2024 | 0.19 µg/l 27 Mar 2024 |
| Calcium, Dissolved 0239 | River water | 5 | Oct 2023 – Mar 2024 | 1.5 mg/l 27 Mar 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 5 | Oct 2023 – Mar 2024 | 14 mg/l 27 Mar 2024 |
| Chlorophyll : Acetone Extract 7887 | River water | 5 | Oct 2023 – Mar 2024 | 0.88 µg/l 27 Mar 2024 |
| Chromium, Dissolved 3409 | River water | 5 | Oct 2023 – Mar 2024 | below 0.5 µg/l 27 Mar 2024 |
| Copper : BLM Bioavailable 4821 | River water | 5 | Oct 2023 – Mar 2024 | 0.04 µg/l 27 Mar 2024 |
| Copper, Dissolved 6450 | River water | 5 | Oct 2023 – Mar 2024 | 1.6 µg/l 27 Mar 2024 |
| Iron, Dissolved 6460 | River water | 5 | Oct 2023 – Mar 2024 | 990 µg/l 27 Mar 2024 |
| Lead : BLM Bioavailable 3377 | River water | 5 | Oct 2023 – Mar 2024 | 1.2 µg/l 27 Mar 2024 |
| Lead, Dissolved 0052 | River water | 5 | Oct 2023 – Mar 2024 | 17 µg/l 27 Mar 2024 |
| Magnesium, Dissolved 0235 | River water | 5 | Oct 2023 – Mar 2024 | 0.53 mg/l 27 Mar 2024 |
| Manganese : BLM Bioavailable 4820 | River water | 5 | Oct 2023 – Mar 2024 | 68 µg/l 27 Mar 2024 |
| Manganese, Dissolved 6458 | River water | 5 | Oct 2023 – Mar 2024 | 68 µg/l 27 Mar 2024 |
| Mercury, Dissolved 0103 | River water | 5 | Oct 2023 – Mar 2024 | below 0.01 µg/l 27 Mar 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 5 | Oct 2023 – Mar 2024 | 0.16 µg/l 27 Mar 2024 |
| Nickel, Dissolved 3410 | River water | 5 | Oct 2023 – Mar 2024 | 1.2 µg/l 27 Mar 2024 |
| Nitrite as N 0118 | River water | 5 | Oct 2023 – Mar 2024 | below 0.001 mg/l 27 Mar 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 5 | Oct 2023 – Mar 2024 | 0.09 mg/l 27 Mar 2024 |
| Solids, Suspended at 105 C 0135 | River water | 5 | Oct 2023 – Mar 2024 | below 3 mg/l 27 Mar 2024 |
| Zinc : BLM Bioavailable 4822 | River water | 5 | Oct 2023 – Mar 2024 | 9.6 µg/l 27 Mar 2024 |
| Zinc, Dissolved 3408 | River water | 5 | Oct 2023 – Mar 2024 | 46 µg/l 27 Mar 2024 |
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.