Irwell at Regent Road Bridge (A57)
EA name: IRWELL AT REGENT RD BRIDGE (A57) (also listed as “RIVER IRWELL AT REGENT ROAD BRIDGE (FORMER SEARCHLIGHT LTD PREMISES, WATER ST)”)
Environment Agency sampling point NW-88002383 · 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
- 19 Mar 2025, 14:4019 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 24 Oct 2026 and had nothing newer.
- Samples banked
- 16 since 6 Oct 2023 Imported periods: 1 Oct 2023 – 24 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 382615, 397680As published, to the nearest 1 m. Open in a map
- River, by its own name
- Irwell
- River, by the map
- River IrwellPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- None tracedThe map stops before any gauge.
- Nearest gauge upstream
- Collyhurst Weir On the River Irk · 3.3 km along the riverAdelphi Weir On the River Irwell · 3.8 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (16 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.4%
Sampled 19 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 99.4 | 99.4% |
| 19 Feb 2025, 10:31 | 99.2 | 99.2% |
| 14 Jan 2025, 12:03 | 102.9 | 102.9% |
| 6 Dec 2024, 10:54 | 103.5 | 103.5% |
| 1 Nov 2024, 11:08 | 95.4 | 95.4% |
| 1 Oct 2024, 12:03 | 101.8 | 101.8% |
| 4 Sep 2024, 11:45 | 81 | 81% |
| 5 Aug 2024, 08:43 | 89.7 | 89.7% |
| 2 Jul 2024, 10:55 | 91 | 91% |
| 14 Jun 2024, 11:05 | 93.8 | 93.8% |
| 13 Mar 2024, 10:05 | 90.8 | 90.8% |
| 8 Feb 2024, 13:56 | 99.7 | 99.7% |
| 16 Jan 2024, 13:49 | 98.5 | 98.5% |
| 13 Dec 2023, 11:48 | 98.8 | 98.8% |
| 7 Nov 2023, 12:32 | 101.2 | 101.2% |
| 6 Oct 2023, 12:38 | 103.1 | 103.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12 mg/l
Sampled 19 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 12 | 12 mg/l |
| 19 Feb 2025, 10:31 | 12.6 | 12.6 mg/l |
| 14 Jan 2025, 12:03 | 12.8 | 12.8 mg/l |
| 6 Dec 2024, 10:54 | 12.3 | 12.3 mg/l |
| 1 Nov 2024, 11:08 | 10.2 | 10.2 mg/l |
| 1 Oct 2024, 12:03 | 11 | 11 mg/l |
| 4 Sep 2024, 11:45 | 7.94 | 7.94 mg/l |
| 5 Aug 2024, 08:43 | 8.55 | 8.55 mg/l |
| 2 Jul 2024, 10:55 | 9.23 | 9.23 mg/l |
| 14 Jun 2024, 11:05 | 9.77 | 9.77 mg/l |
| 13 Mar 2024, 10:05 | 10.4 | 10.4 mg/l |
| 8 Feb 2024, 13:56 | 12.4 | 12.4 mg/l |
| 16 Jan 2024, 13:49 | 12.9 | 12.9 mg/l |
| 13 Dec 2023, 11:48 | 11.7 | 11.7 mg/l |
| 7 Nov 2023, 12:32 | 11.4 | 11.4 mg/l |
| 6 Oct 2023, 12:38 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
7.2 °C
Sampled 19 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 7.2 | 7.2 °C |
| 19 Feb 2025, 10:31 | 5 | 5 °C |
| 14 Jan 2025, 12:03 | 6.1 | 6.1 °C |
| 6 Dec 2024, 10:54 | 7.7 | 7.7 °C |
| 1 Nov 2024, 11:08 | 12.1 | 12.1 °C |
| 1 Oct 2024, 12:03 | 11.9 | 11.9 °C |
| 4 Sep 2024, 11:45 | 16.2 | 16.2 °C |
| 5 Aug 2024, 08:43 | 17.5 | 17.5 °C |
| 2 Jul 2024, 10:55 | 14.6 | 14.6 °C |
| 14 Jun 2024, 11:05 | 13.4 | 13.4 °C |
| 13 Mar 2024, 10:05 | 9.4 | 9.4 °C |
| 8 Feb 2024, 13:56 | 6 | 6 °C |
| 16 Jan 2024, 13:49 | 4.1 | 4.1 °C |
| 13 Dec 2023, 11:48 | 7.8 | 7.8 °C |
| 7 Nov 2023, 12:32 | 10 | 10 °C |
| 6 Oct 2023, 12:38 | 14.2 | 14.2 °C |
pH
code 0061
7.67
Sampled 19 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 7.67 | 7.67 |
| 19 Feb 2025, 10:31 | 7.81 | 7.81 |
| 14 Jan 2025, 12:03 | 7.71 | 7.71 |
| 6 Dec 2024, 10:54 | 7.62 | 7.62 |
| 1 Nov 2024, 11:08 | 7.65 | 7.65 |
| 1 Oct 2024, 12:03 | 7.7 | 7.7 |
| 4 Sep 2024, 11:45 | 7.75 | 7.75 |
| 5 Aug 2024, 08:43 | 7.66 | 7.66 |
| 2 Jul 2024, 10:55 | 8.15 | 8.15 |
| 14 Jun 2024, 11:05 | 7.68 | 7.68 |
| 13 Mar 2024, 10:05 | 7.54 | 7.54 |
| 8 Feb 2024, 13:56 | 7.77 | 7.77 |
| 16 Jan 2024, 13:49 | 7.84 | 7.84 |
| 13 Dec 2023, 11:48 | 7.67 | 7.67 |
| 7 Nov 2023, 12:32 | 7.69 | 7.69 |
| 6 Oct 2023, 12:38 | 7.61 | 7.61 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.58 mg/l
Sampled 19 Mar 2025, 19 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 0.58 | 0.58 mg/l |
| 19 Feb 2025, 10:31 | 0.82 | 0.82 mg/l |
| 14 Jan 2025, 12:03 | 0.41 | 0.41 mg/l |
| 1 Nov 2024, 11:08 | 0.2 | 0.2 mg/l |
| 1 Oct 2024, 12:03 | 0.1 | 0.1 mg/l |
| 4 Sep 2024, 11:45 | 0.26 | 0.26 mg/l |
| 5 Aug 2024, 08:43 | 0.35 | 0.35 mg/l |
| 2 Jul 2024, 10:55 | 0.24 | 0.24 mg/l |
| 14 Jun 2024, 11:05 | 0.56 | 0.56 mg/l |
| 13 Mar 2024, 10:05 | 1.4 | 1.4 mg/l |
| 8 Feb 2024, 13:56 | 0.64 | 0.64 mg/l |
| 16 Jan 2024, 13:49 | 1.3 | 1.3 mg/l |
| 13 Dec 2023, 11:48 | 0.24 | 0.24 mg/l |
| 7 Nov 2023, 12:32 | 0.15 | 0.15 mg/l |
| 6 Oct 2023, 12:38 | 0.13 | 0.13 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.71 mg/l
Sampled 19 Mar 2025, 19 months ago · 14 results banked
Every result (14)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 6.71 | 6.71 mg/l |
| 19 Feb 2025, 10:31 | 6.33 | 6.33 mg/l |
| 14 Jan 2025, 12:03 | 2.35 | 2.35 mg/l |
| 1 Nov 2024, 11:08 | 4.01 | 4.01 mg/l |
| 1 Oct 2024, 12:03 | 1.58 | 1.58 mg/l |
| 4 Sep 2024, 11:45 | 5.61 | 5.61 mg/l |
| 5 Aug 2024, 08:43 | 5.3 | 5.3 mg/l |
| 2 Jul 2024, 10:55 | 6.07 | 6.07 mg/l |
| 14 Jun 2024, 11:05 | 4.27 | 4.27 mg/l |
| 13 Mar 2024, 10:05 | 4.07 | 4.07 mg/l |
| 16 Jan 2024, 13:49 | 4.93 | 4.93 mg/l |
| 13 Dec 2023, 11:48 | 2.36 | 2.36 mg/l |
| 7 Nov 2023, 12:32 | 1.18 | 1.18 mg/l |
| 6 Oct 2023, 12:38 | 0.968 | 0.968 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.046 mg/l
Sampled 19 Mar 2025, 19 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 0.046 | 0.046 mg/l |
| 19 Feb 2025, 10:31 | 0.058 | 0.058 mg/l |
| 14 Jan 2025, 12:03 | 0.042 | 0.042 mg/l |
| 1 Nov 2024, 11:08 | 0.066 | 0.066 mg/l |
| 1 Oct 2024, 12:03 | 0.078 | 0.078 mg/l |
| 4 Sep 2024, 11:45 | 0.12 | 0.12 mg/l |
| 5 Aug 2024, 08:43 | 0.081 | 0.081 mg/l |
| 2 Jul 2024, 10:55 | 0.1 | 0.1 mg/l |
| 14 Jun 2024, 11:05 | 0.081 | 0.081 mg/l |
| 13 Mar 2024, 10:05 | 0.049 | 0.049 mg/l |
| 8 Feb 2024, 13:56 | 0.051 | 0.051 mg/l |
| 16 Jan 2024, 13:49 | 0.049 | 0.049 mg/l |
| 13 Dec 2023, 11:48 | 0.052 | 0.052 mg/l |
| 7 Nov 2023, 12:32 | 0.044 | 0.044 mg/l |
| 6 Oct 2023, 12:38 | 0.087 | 0.087 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
515 µS/cm
Sampled 19 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Mar 2025, 14:40 | 515 | 515 µS/cm |
| 19 Feb 2025, 10:31 | 509 | 509 µS/cm |
| 14 Jan 2025, 12:03 | 355 | 355 µS/cm |
| 6 Dec 2024, 10:54 | 210 | 210 µS/cm |
| 1 Nov 2024, 11:08 | 332 | 332 µS/cm |
| 1 Oct 2024, 12:03 | 215 | 215 µS/cm |
| 4 Sep 2024, 11:45 | 445 | 445 µS/cm |
| 5 Aug 2024, 08:43 | 524 | 524 µS/cm |
| 2 Jul 2024, 10:55 | 499 | 499 µS/cm |
| 14 Jun 2024, 11:05 | 467 | 467 µS/cm |
| 13 Mar 2024, 10:05 | 484 | 484 µS/cm |
| 8 Feb 2024, 13:56 | 368 | 368 µS/cm |
| 16 Jan 2024, 13:49 | 502 | 502 µS/cm |
| 13 Dec 2023, 11:48 | 294 | 294 µS/cm |
| 7 Nov 2023, 12:32 | 191 | 191 µS/cm |
| 6 Oct 2023, 12:38 | 168 | 168 µS/cm |
Everything measured here
15 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 15 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 16 | Oct 2023 – Mar 2025 | 99.4% 19 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 16 | Oct 2023 – Mar 2025 | 12 mg/l 19 Mar 2025 |
| Temperature of Water 0076 | River water | 16 | Oct 2023 – Mar 2025 | 7.2 °C 19 Mar 2025 |
| pH 0061 | River water | 16 | Oct 2023 – Mar 2025 | 7.67 19 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Oct 2023 – Mar 2025 | 0.58 mg/l 19 Mar 2025 |
| Nitrate as N 0117 | River water | 14 | Oct 2023 – Mar 2025 | 6.71 mg/l 19 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 15 | Oct 2023 – Mar 2025 | 0.046 mg/l 19 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 16 | Oct 2023 – Mar 2025 | 515 µS/cm 19 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 15 | Oct 2023 – Mar 2025 | 85 mg/l 19 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 15 | Oct 2023 – Mar 2025 | 0.00406 mg/l 19 Mar 2025 |
| BOD : 5 Day ATU 0085 | River water | 15 | Oct 2023 – Mar 2025 | below 2 mg/l 19 Mar 2025 |
| Chloride 0172 | River water | 15 | Oct 2023 – Mar 2025 | 44 mg/l 19 Mar 2025 |
| Nitrite as N 0118 | River water | 14 | Oct 2023 – Mar 2025 | 0.088 mg/l 19 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 14 | Oct 2023 – Mar 2025 | 6.8 mg/l 19 Mar 2025 |
| Solids, Suspended at 105 C 0135 | River water | 16 | Oct 2023 – Mar 2025 | 4.4 mg/l 19 Mar 2025 |
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.