Calder at Dr Reddy's Bridge - Mirfield
EA name: CALDER AT DR REDDY'S BRIDGE - MIRFIELD (also listed as “CALDER AT DR REDDY'S BRIDGE - STEANARD LANE - MIRFIELD”)
Environment Agency sampling point NE-49500619 · 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
- 16 Jun 2026, 09:044 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 31 since 6 Jun 2024 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 421460, 419460As published, to the nearest 10 m. Open in a map
- River, by its own name
- Calder
- River, by the map
- River CalderPlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- Dewsbury On the River Calder · 4.8 km along the river
- Nearest gauge upstream
- Ledgard Bridge On the River Calder · 1.6 km along the river
- Why it was sampled
- Monitoring (national agency policy) (21 samples)
Environmental monitoring statutory (EU directives) (10 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
90.5%
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 90.5 | 90.5% |
| 1 Jun 2026, 09:35 | 86.2 | 86.2% |
| 21 May 2026, 09:53 | 94.9 | 94.9% |
| 14 May 2026, 09:52 | 95.1 | 95.1% |
| 21 Apr 2026, 09:08 | 101.1 | 101.1% |
| 1 Apr 2026, 09:24 | 96.7 | 96.7% |
| 16 Mar 2026, 10:53 | 92.1 | 92.1% |
| 4 Mar 2026, 10:05 | 99.8 | 99.8% |
| 19 Feb 2026, 09:51 | 99.4 | 99.4% |
| 5 Feb 2026, 09:46 | 99.1 | 99.1% |
| 26 Jan 2026, 10:13 | 100.6 | 100.6% |
| 16 Jan 2026, 10:52 | 100.2 | 100.2% |
| 4 Mar 2025, 10:46 | 95.7 | 95.7% |
| 3 Feb 2025, 10:24 | 95.1 | 95.1% |
| 20 Jan 2025, 10:02 | 99 | 99% |
| 4 Dec 2024, 10:34 | 98.3 | 98.3% |
| 19 Nov 2024, 10:26 | 108.4 | 108.4% |
| 15 Oct 2024, 11:23 | 97.3 | 97.3% |
| 23 Sep 2024, 10:38 | 88.6 | 88.6% |
| 19 Aug 2024, 10:29 | 88.9 | 88.9% |
| 15 Jul 2024, 10:22 | 92.9 | 92.9% |
| 6 Jun 2024, 11:18 | 93.1 | 93.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.14 mg/l
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 9.14 | 9.14 mg/l |
| 1 Jun 2026, 09:35 | 8.33 | 8.33 mg/l |
| 21 May 2026, 09:53 | 10 | 10 mg/l |
| 14 May 2026, 09:52 | 10.5 | 10.5 mg/l |
| 21 Apr 2026, 09:08 | 11.4 | 11.4 mg/l |
| 1 Apr 2026, 09:24 | 11 | 11 mg/l |
| 16 Mar 2026, 10:53 | 11 | 11 mg/l |
| 4 Mar 2026, 10:05 | 11.6 | 11.6 mg/l |
| 19 Feb 2026, 09:51 | 12.5 | 12.5 mg/l |
| 5 Feb 2026, 09:46 | 12.3 | 12.3 mg/l |
| 26 Jan 2026, 10:13 | 12.5 | 12.5 mg/l |
| 16 Jan 2026, 10:52 | 12.7 | 12.7 mg/l |
| 4 Mar 2025, 10:46 | 11.6 | 11.6 mg/l |
| 3 Feb 2025, 10:24 | 11.7 | 11.7 mg/l |
| 20 Jan 2025, 10:02 | 12.6 | 12.6 mg/l |
| 4 Dec 2024, 10:34 | 12.1 | 12.1 mg/l |
| 19 Nov 2024, 10:26 | 13.5 | 13.5 mg/l |
| 15 Oct 2024, 11:23 | 11 | 11 mg/l |
| 23 Sep 2024, 10:38 | 9.01 | 9.01 mg/l |
| 19 Aug 2024, 10:29 | 8.75 | 8.75 mg/l |
| 15 Jul 2024, 10:22 | 9.26 | 9.26 mg/l |
| 6 Jun 2024, 11:18 | 9.59 | 9.59 mg/l |
Water temperature
code 0076 · °C
14.8 °C
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 14.8 | 14.8 °C |
| 1 Jun 2026, 09:35 | 16.9 | 16.9 °C |
| 21 May 2026, 09:53 | 12.7 | 12.7 °C |
| 14 May 2026, 09:52 | 10.8 | 10.8 °C |
| 21 Apr 2026, 09:08 | 10.1 | 10.1 °C |
| 1 Apr 2026, 09:24 | 9.7 | 9.7 °C |
| 16 Mar 2026, 10:53 | 7.5 | 7.5 °C |
| 4 Mar 2026, 10:05 | 8.7 | 8.7 °C |
| 19 Feb 2026, 09:51 | 5.5 | 5.5 °C |
| 5 Feb 2026, 09:46 | 6.2 | 6.2 °C |
| 26 Jan 2026, 10:13 | 6 | 6 °C |
| 16 Jan 2026, 10:52 | 5.3 | 5.3 °C |
| 4 Mar 2025, 10:46 | 7 | 7 °C |
| 3 Feb 2025, 10:24 | 6.5 | 6.5 °C |
| 20 Jan 2025, 10:02 | 5 | 5 °C |
| 4 Dec 2024, 10:34 | 6.5 | 6.5 °C |
| 19 Nov 2024, 10:26 | 5.8 | 5.8 °C |
| 15 Oct 2024, 11:23 | 9.8 | 9.8 °C |
| 23 Sep 2024, 10:38 | 14.5 | 14.5 °C |
| 19 Aug 2024, 10:29 | 16 | 16 °C |
| 15 Jul 2024, 10:22 | 15.4 | 15.4 °C |
| 6 Jun 2024, 11:18 | 13.9 | 13.9 °C |
pH
code 0061
7.51
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 7.51 | 7.51 |
| 1 Jun 2026, 09:35 | 7.41 | 7.41 |
| 21 May 2026, 09:53 | 7.59 | 7.59 |
| 14 May 2026, 09:52 | 7.7 | 7.7 |
| 21 Apr 2026, 09:08 | 7.46 | 7.46 |
| 1 Apr 2026, 09:24 | 7.36 | 7.36 |
| 16 Mar 2026, 10:53 | 7.4 | 7.4 |
| 4 Mar 2026, 10:05 | 7.63 | 7.63 |
| 19 Feb 2026, 09:51 | 7.35 | 7.35 |
| 5 Feb 2026, 09:46 | 7.47 | 7.47 |
| 26 Jan 2026, 10:13 | 7.7 | 7.7 |
| 16 Jan 2026, 10:52 | 7.71 | 7.71 |
| 4 Mar 2025, 10:46 | 7.43 | 7.43 |
| 3 Feb 2025, 10:24 | 7.57 | 7.57 |
| 20 Jan 2025, 10:02 | 7.47 | 7.47 |
| 4 Dec 2024, 10:34 | 7.66 | 7.66 |
| 19 Nov 2024, 10:26 | 7.53 | 7.53 |
| 15 Oct 2024, 11:23 | 7.54 | 7.54 |
| 23 Sep 2024, 10:38 | 7.32 | 7.32 |
| 19 Aug 2024, 10:29 | 7.34 | 7.34 |
| 15 Jul 2024, 10:22 | 7.34 | 7.34 |
| 6 Jun 2024, 11:18 | 7.51 | 7.51 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.11 mg/l
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 0.11 | 0.11 mg/l |
| 1 Jun 2026, 09:35 | 0.2 | 0.2 mg/l |
| 21 May 2026, 09:53 | 0.41 | 0.41 mg/l |
| 14 May 2026, 09:52 | 0.064 | 0.064 mg/l |
| 21 Apr 2026, 09:08 | 0.032 | 0.032 mg/l |
| 1 Apr 2026, 09:24 | 0.058 | 0.058 mg/l |
| 16 Mar 2026, 10:53 | 0.22 | 0.22 mg/l |
| 4 Mar 2026, 10:05 | 0.16 | 0.16 mg/l |
| 19 Feb 2026, 09:51 | 0.32 | 0.32 mg/l |
| 5 Feb 2026, 09:46 | 0.21 | 0.21 mg/l |
| 26 Jan 2026, 10:13 | 0.15 | 0.15 mg/l |
| 16 Jan 2026, 10:52 | 0.13 | 0.13 mg/l |
| 4 Mar 2025, 10:46 | 0.16 | 0.16 mg/l |
| 3 Feb 2025, 10:24 | 0.25 | 0.25 mg/l |
| 20 Jan 2025, 10:02 | 0.26 | 0.26 mg/l |
| 4 Dec 2024, 10:34 | 0.11 | 0.11 mg/l |
| 19 Nov 2024, 10:26 | 0.13 | 0.13 mg/l |
| 15 Oct 2024, 11:23 | 0.064 | 0.064 mg/l |
| 23 Sep 2024, 10:38 | 1.2 | 1.2 mg/l |
| 19 Aug 2024, 10:29 | 0.069 | 0.069 mg/l |
| 15 Jul 2024, 10:22 | 0.34 | 0.34 mg/l |
| 6 Jun 2024, 11:18 | 0.32 | 0.32 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.46 mg/l
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 5.46 | 5.46 mg/l |
| 1 Jun 2026, 09:35 | 7.03 | 7.03 mg/l |
| 21 May 2026, 09:53 | 2.17 | 2.17 mg/l |
| 14 May 2026, 09:52 | 4.07 | 4.07 mg/l |
| 21 Apr 2026, 09:08 | 4.18 | 4.18 mg/l |
| 1 Apr 2026, 09:24 | 2.98 | 2.98 mg/l |
| 16 Mar 2026, 10:53 | 3.06 | 3.06 mg/l |
| 4 Mar 2026, 10:05 | 3.76 | 3.76 mg/l |
| 19 Feb 2026, 09:51 | 3.46 | 3.46 mg/l |
| 5 Feb 2026, 09:46 | 3.56 | 3.56 mg/l |
| 26 Jan 2026, 10:13 | 3.27 | 3.27 mg/l |
| 16 Jan 2026, 10:52 | 3.47 | 3.47 mg/l |
| 4 Mar 2025, 10:46 | 4.07 | 4.07 mg/l |
| 3 Feb 2025, 10:24 | 3.85 | 3.85 mg/l |
| 20 Jan 2025, 10:02 | 3.37 | 3.37 mg/l |
| 4 Dec 2024, 10:34 | 3.28 | 3.28 mg/l |
| 19 Nov 2024, 10:26 | 5.05 | 5.05 mg/l |
| 15 Oct 2024, 11:23 | 4.38 | 4.38 mg/l |
| 23 Sep 2024, 10:38 | 7.81 | 7.81 mg/l |
| 19 Aug 2024, 10:29 | 7.88 | 7.88 mg/l |
| 15 Jul 2024, 10:22 | 5.41 | 5.41 mg/l |
| 6 Jun 2024, 11:18 | 5.52 | 5.52 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.11 mg/l
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 0.11 | 0.11 mg/l |
| 1 Jun 2026, 09:35 | 0.12 | 0.12 mg/l |
| 21 May 2026, 09:53 | 0.053 | 0.053 mg/l |
| 14 May 2026, 09:52 | 0.094 | 0.094 mg/l |
| 21 Apr 2026, 09:08 | 0.036 | 0.036 mg/l |
| 1 Apr 2026, 09:24 | 0.049 | 0.049 mg/l |
| 16 Mar 2026, 10:53 | 0.051 | 0.051 mg/l |
| 4 Mar 2026, 10:05 | 0.066 | 0.066 mg/l |
| 19 Feb 2026, 09:51 | 0.056 | 0.056 mg/l |
| 5 Feb 2026, 09:46 | 0.057 | 0.057 mg/l |
| 26 Jan 2026, 10:13 | 0.044 | 0.044 mg/l |
| 16 Jan 2026, 10:52 | 0.039 | 0.039 mg/l |
| 4 Mar 2025, 10:46 | 0.057 | 0.057 mg/l |
| 3 Feb 2025, 10:24 | 0.051 | 0.051 mg/l |
| 20 Jan 2025, 10:02 | 0.054 | 0.054 mg/l |
| 4 Dec 2024, 10:34 | 0.042 | 0.042 mg/l |
| 19 Nov 2024, 10:26 | 0.11 | 0.11 mg/l |
| 15 Oct 2024, 11:23 | 0.073 | 0.073 mg/l |
| 23 Sep 2024, 10:38 | 0.26 | 0.26 mg/l |
| 19 Aug 2024, 10:29 | 0.33 | 0.33 mg/l |
| 15 Jul 2024, 10:22 | 0.22 | 0.22 mg/l |
| 6 Jun 2024, 11:18 | 0.2 | 0.2 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
423 µS/cm
Sampled 16 Jun 2026, 4 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jun 2026, 09:04 | 423 | 423 µS/cm |
| 1 Jun 2026, 09:35 | 523 | 523 µS/cm |
| 21 May 2026, 09:53 | 250 | 250 µS/cm |
| 14 May 2026, 09:52 | 430 | 430 µS/cm |
| 21 Apr 2026, 09:08 | 395 | 395 µS/cm |
| 1 Apr 2026, 09:24 | 299 | 299 µS/cm |
| 16 Mar 2026, 10:53 | 355 | 355 µS/cm |
| 4 Mar 2026, 10:05 | 359 | 359 µS/cm |
| 19 Feb 2026, 09:51 | 561 | 561 µS/cm |
| 5 Feb 2026, 09:46 | 358 | 358 µS/cm |
| 26 Jan 2026, 10:13 | 289 | 289 µS/cm |
| 16 Jan 2026, 10:52 | 337 | 337 µS/cm |
| 4 Mar 2025, 10:46 | 347 | 347 µS/cm |
| 3 Feb 2025, 10:24 | 327 | 327 µS/cm |
| 20 Jan 2025, 10:02 | 342 | 342 µS/cm |
| 4 Dec 2024, 10:34 | 352 | 352 µS/cm |
| 19 Nov 2024, 10:26 | 418 | 418 µS/cm |
| 15 Oct 2024, 11:23 | 326 | 326 µS/cm |
| 23 Sep 2024, 10:38 | 574 | 574 µS/cm |
| 19 Aug 2024, 10:29 | 519 | 519 µS/cm |
| 15 Jul 2024, 10:22 | 429 | 429 µS/cm |
| 6 Jun 2024, 11:18 | 427 | 427 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Jun 2024 – Jun 2026 | 90.5% 16 Jun 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jun 2024 – Jun 2026 | 9.14 mg/l 16 Jun 2026 |
| Temperature of Water 0076 | River water | 22 | Jun 2024 – Jun 2026 | 14.8 °C 16 Jun 2026 |
| pH 0061 | River water | 22 | Jun 2024 – Jun 2026 | 7.51 16 Jun 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Jun 2024 – Jun 2026 | 0.11 mg/l 16 Jun 2026 |
| Nitrate as N 0117 | River water | 22 | Jun 2024 – Jun 2026 | 5.46 mg/l 16 Jun 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jun 2024 – Jun 2026 | 0.11 mg/l 16 Jun 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Jun 2024 – Jun 2026 | 423 µS/cm 16 Jun 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Jun 2024 – Jun 2026 | 45 mg/l 16 Jun 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jun 2024 – Jun 2026 | 0.00094 mg/l 16 Jun 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Jul 2024 – Jun 2026 | below 4 mg/l 1 Jun 2026 |
| Nitrite as N 0118 | River water | 22 | Jun 2024 – Jun 2026 | 0.036 mg/l 16 Jun 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jun 2024 – Jun 2026 | 5.5 mg/l 16 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.