River Irwell upstream of Bury sewage treatment works
EA name: RIVER IRWELL U/S OF BURY S.T.W (also listed as “RIVER IRWELL U/S OF BURY S.T.W AT ST DUMERS LANE A6053”)
Environment Agency sampling point NW-88021917 · 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
- 11 Aug 2026, 09:4751 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 26 since 18 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 380235, 408421As 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, 1 m from the line.
- Next gauge downstream
- Pioneer Mills On the River Irwell · 3.6 km along the river
- Nearest gauge upstream
- Bury Ground On the River Irwell · 4.0 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (17 samples)
Monitoring (national agency policy) (9 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
97.6%
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 09:47 | 97.6 | 97.6% |
| 1 Jul 2026, 10:05 | 100.1 | 100.1% |
| 16 Jun 2026, 11:50 | 102.1 | 102.1% |
| 14 May 2026, 11:35 | 101.6 | 101.6% |
| 17 Apr 2026, 10:24 | 101.8 | 101.8% |
| 17 Mar 2026, 11:11 | 104.9 | 104.9% |
| 18 Feb 2026, 09:43 | 100.3 | 100.3% |
| 6 Jan 2026, 10:14 | 97.2 | 97.2% |
| 3 Dec 2025, 11:23 | 102.5 | 102.5% |
| 5 Nov 2025, 10:45 | 101.7 | 101.7% |
| 20 Oct 2025, 10:42 | 99.9 | 99.9% |
| 30 Sep 2025, 11:41 | 100.7 | 100.7% |
| 12 Aug 2025, 09:34 | 90.1 | 90.1% |
| 14 Jul 2025, 10:02 | 96 | 96% |
| 18 Jun 2025, 11:02 | 100.2 | 100.2% |
| 19 May 2025, 09:42 | 93.7 | 93.7% |
| 10 Apr 2025, 11:32 | 122.5 | 122.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.52 mg/l
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 09:47 | 9.52 | 9.52 mg/l |
| 1 Jul 2026, 10:05 | 9.59 | 9.59 mg/l |
| 16 Jun 2026, 11:50 | 10.2 | 10.2 mg/l |
| 14 May 2026, 11:35 | 11.6 | 11.6 mg/l |
| 17 Apr 2026, 10:24 | 11.3 | 11.3 mg/l |
| 17 Mar 2026, 11:11 | 12 | 12 mg/l |
| 18 Feb 2026, 09:43 | 13.2 | 13.2 mg/l |
| 6 Jan 2026, 10:14 | 14.1 | 14.1 mg/l |
| 3 Dec 2025, 11:23 | 12.4 | 12.4 mg/l |
| 5 Nov 2025, 10:45 | 11 | 11 mg/l |
| 20 Oct 2025, 10:42 | 10.8 | 10.8 mg/l |
| 30 Sep 2025, 11:41 | 10.9 | 10.9 mg/l |
| 12 Aug 2025, 09:34 | 8.49 | 8.49 mg/l |
| 14 Jul 2025, 10:02 | 8.67 | 8.67 mg/l |
| 18 Jun 2025, 11:02 | 9.6 | 9.6 mg/l |
| 19 May 2025, 09:42 | 9.57 | 9.57 mg/l |
| 10 Apr 2025, 11:32 | 13.7 | 13.7 mg/l |
Water temperature
code 0076 · °C
16.4 °C
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 09:47 | 16.4 | 16.4 °C |
| 1 Jul 2026, 10:05 | 17.3 | 17.3 °C |
| 16 Jun 2026, 11:50 | 15.4 | 15.4 °C |
| 14 May 2026, 11:35 | 9.3 | 9.3 °C |
| 17 Apr 2026, 10:24 | 10.5 | 10.5 °C |
| 17 Mar 2026, 11:11 | 9.3 | 9.3 °C |
| 18 Feb 2026, 09:43 | 3.9 | 3.9 °C |
| 6 Jan 2026, 10:14 | 0.2 | 0.2 °C |
| 3 Dec 2025, 11:23 | 7.2 | 7.2 °C |
| 5 Nov 2025, 10:45 | 11.8 | 11.8 °C |
| 20 Oct 2025, 10:42 | 11.8 | 11.8 °C |
| 30 Sep 2025, 11:41 | 11.6 | 11.6 °C |
| 12 Aug 2025, 09:34 | 18.1 | 18.1 °C |
| 14 Jul 2025, 10:02 | 20.2 | 20.2 °C |
| 18 Jun 2025, 11:02 | 17.3 | 17.3 °C |
| 19 May 2025, 09:42 | 14.3 | 14.3 °C |
| 10 Apr 2025, 11:32 | 10.3 | 10.3 °C |
pH
code 0061
8.18
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 09:47 | 8.18 | 8.18 |
| 1 Jul 2026, 10:05 | 7.93 | 7.93 |
| 16 Jun 2026, 11:50 | 8.07 | 8.07 |
| 14 May 2026, 11:35 | 8.08 | 8.08 |
| 17 Apr 2026, 10:24 | 8 | 8 |
| 17 Mar 2026, 11:11 | 8.01 | 8.01 |
| 18 Feb 2026, 09:43 | 7.86 | 7.86 |
| 6 Jan 2026, 10:14 | 7.88 | 7.88 |
| 3 Dec 2025, 11:23 | 7.73 | 7.73 |
| 5 Nov 2025, 10:45 | 7.72 | 7.72 |
| 20 Oct 2025, 10:42 | 7.88 | 7.88 |
| 30 Sep 2025, 11:41 | 7.89 | 7.89 |
| 12 Aug 2025, 09:34 | 7.77 | 7.77 |
| 14 Jul 2025, 10:02 | 7.97 | 7.97 |
| 18 Jun 2025, 11:02 | 7.94 | 7.94 |
| 19 May 2025, 09:42 | 7.82 | 7.82 |
| 10 Apr 2025, 11:32 | 8.94 | 8.94 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 09:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2026, 10:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jun 2026, 11:50 | 0.038 | 0.038 mg/l |
| 14 May 2026, 11:35 | 0.21 | 0.21 mg/l |
| 17 Apr 2026, 10:24 | 0.032 | 0.032 mg/l |
| 17 Mar 2026, 11:11 | 0.064 | 0.064 mg/l |
| 18 Feb 2026, 09:43 | 0.079 | 0.079 mg/l |
| 6 Jan 2026, 10:14 | 0.43 | 0.43 mg/l |
| 3 Dec 2025, 11:23 | 0.031 | 0.031 mg/l |
| 5 Nov 2025, 10:45 | 0.09 | 0.09 mg/l |
| 20 Oct 2025, 10:42 | 0.035 | 0.035 mg/l |
| 30 Sep 2025, 11:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2025, 09:34 | 0.039 | 0.039 mg/l |
| 14 Jul 2025, 10:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2025, 11:02 | 0.058 | 0.058 mg/l |
| 19 May 2025, 09:42 | 0.098 | 0.098 mg/l |
| 10 Apr 2025, 11:32 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.89 mg/l
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 09:47 | 3.89 | 3.89 mg/l |
| 1 Jul 2026, 10:05 | 3.08 | 3.08 mg/l |
| 16 Jun 2026, 11:50 | 2.49 | 2.49 mg/l |
| 14 May 2026, 11:35 | 1.86 | 1.86 mg/l |
| 17 Apr 2026, 10:24 | 2.17 | 2.17 mg/l |
| 17 Mar 2026, 11:11 | 1.97 | 1.97 mg/l |
| 18 Feb 2026, 09:43 | 2.08 | 2.08 mg/l |
| 6 Jan 2026, 10:14 | 3.02 | 3.02 mg/l |
| 3 Dec 2025, 11:23 | 1.58 | 1.58 mg/l |
| 5 Nov 2025, 10:45 | 1.08 | 1.08 mg/l |
| 20 Oct 2025, 10:42 | 1.58 | 1.58 mg/l |
| 30 Sep 2025, 11:41 | 1.99 | 1.99 mg/l |
| 12 Aug 2025, 09:34 | 3.99 | 3.99 mg/l |
| 14 Jul 2025, 10:02 | 4.28 | 4.28 mg/l |
| 18 Jun 2025, 11:02 | 3.86 | 3.86 mg/l |
| 19 May 2025, 09:42 | 5.33 | 5.33 mg/l |
| 10 Apr 2025, 11:32 | 4.77 | 4.77 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.069 mg/l
Sampled 1 Jul 2026, 3 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 10:05 | 0.069 | 0.069 mg/l |
| 16 Jun 2026, 11:50 | 0.082 | 0.082 mg/l |
| 14 May 2026, 11:35 | 0.04 | 0.04 mg/l |
| 17 Apr 2026, 10:24 | 0.046 | 0.046 mg/l |
| 17 Mar 2026, 11:11 | 0.049 | 0.049 mg/l |
| 18 Feb 2026, 09:43 | 0.048 | 0.048 mg/l |
| 6 Jan 2026, 10:14 | 0.052 | 0.052 mg/l |
| 3 Dec 2025, 11:23 | 0.027 | 0.027 mg/l |
| 5 Nov 2025, 10:45 | 0.066 | 0.066 mg/l |
| 20 Oct 2025, 10:42 | 0.059 | 0.059 mg/l |
| 30 Sep 2025, 11:41 | 0.038 | 0.038 mg/l |
| 12 Aug 2025, 09:34 | 0.017 | 0.017 mg/l |
| 14 Jul 2025, 10:02 | 0.029 | 0.029 mg/l |
| 18 Jun 2025, 11:02 | 0.079 | 0.079 mg/l |
| 19 May 2025, 09:42 | 0.091 | 0.091 mg/l |
| 10 Apr 2025, 11:32 | 0.037 | 0.037 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
418 µS/cm
Sampled 11 Aug 2026, 51 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 09:47 | 418 | 418 µS/cm |
| 1 Jul 2026, 10:05 | 340 | 340 µS/cm |
| 16 Jun 2026, 11:50 | 287 | 287 µS/cm |
| 14 May 2026, 11:35 | 264 | 264 µS/cm |
| 17 Apr 2026, 10:24 | 255 | 255 µS/cm |
| 17 Mar 2026, 11:11 | 269 | 269 µS/cm |
| 18 Feb 2026, 09:43 | 249 | 249 µS/cm |
| 6 Jan 2026, 10:14 | 420 | 420 µS/cm |
| 3 Dec 2025, 11:23 | 209 | 209 µS/cm |
| 5 Nov 2025, 10:45 | 180 | 180 µS/cm |
| 20 Oct 2025, 10:42 | 221 | 221 µS/cm |
| 30 Sep 2025, 11:41 | 279 | 279 µS/cm |
| 12 Aug 2025, 09:34 | 403 | 403 µS/cm |
| 14 Jul 2025, 10:02 | 417 | 417 µS/cm |
| 18 Jun 2025, 11:02 | 352 | 352 µS/cm |
| 19 May 2025, 09:42 | 433 | 433 µS/cm |
| 10 Apr 2025, 11:32 | 392 | 392 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 | 17 | Apr 2025 – Aug 2026 | 97.6% 11 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 17 | Apr 2025 – Aug 2026 | 9.52 mg/l 11 Aug 2026 |
| Temperature of Water 0076 | River water | 17 | Apr 2025 – Aug 2026 | 16.4 °C 11 Aug 2026 |
| pH 0061 | River water | 17 | Apr 2025 – Aug 2026 | 8.18 11 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 17 | Apr 2025 – Aug 2026 | below 0.03 mg/l 11 Aug 2026 |
| Nitrate as N 0117 | River water | 17 | Apr 2025 – Aug 2026 | 3.89 mg/l 11 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 16 | Apr 2025 – Jul 2026 | 0.069 mg/l 1 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 17 | Apr 2025 – Aug 2026 | 418 µS/cm 11 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 17 | Apr 2025 – Aug 2026 | 88 mg/l 11 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 17 | Apr 2025 – Aug 2026 | below 0.00087 mg/l 11 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 25 | Jun 2024 – Aug 2026 | 1.6 mg/l 11 Aug 2026 |
| Chloride 0172 | River water | 17 | Apr 2025 – Aug 2026 | 28 mg/l 11 Aug 2026 |
| Nitrite as N 0118 | River water | 17 | Apr 2025 – Aug 2026 | 0.014 mg/l 11 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 17 | Apr 2025 – Aug 2026 | 3.9 mg/l 11 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 17 | Apr 2025 – Aug 2026 | 4.2 mg/l 11 Aug 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.