River Roch upstream of Hey Brook
EA name: RIVER ROCH U/S HEY BROOK
Environment Agency sampling point NW-88002183 · 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
- 24 Mar 2026, 11:007 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
- 12 since 7 Apr 2025 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 390679, 413709As published, to the nearest 1 m. Open in a map
- River, by its own name
- Roch
- River, by the map
- River RochPlaced on the river its name gives, 0 m from the line.
- Next gauge downstream
- Rochdale On the River Roch · 3.8 km along the river
- Nearest gauge upstream
- Albert Royds Bridge On the River Roch · 0.9 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
103.3%
Sampled 24 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 103.3 | 103.3% |
| 24 Feb 2026, 13:11 | 103.5 | 103.5% |
| 29 Jan 2026, 11:42 | 101.4 | 101.4% |
| 9 Dec 2025, 14:03 | 100.2 | 100.2% |
| 17 Nov 2025, 11:35 | 103.4 | 103.4% |
| 30 Oct 2025, 09:49 | 102.7 | 102.7% |
| 25 Sep 2025, 11:23 | 101.6 | 101.6% |
| 14 Aug 2025, 10:06 | 103.6 | 103.6% |
| 10 Jul 2025, 09:45 | 101.5 | 101.5% |
| 27 Jun 2025, 11:56 | 99.9 | 99.9% |
| 13 May 2025, 12:03 | 102.6 | 102.6% |
| 7 Apr 2025, 14:47 | 118.8 | 118.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.9 mg/l
Sampled 24 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 11.9 | 11.9 mg/l |
| 24 Feb 2026, 13:11 | 12.2 | 12.2 mg/l |
| 29 Jan 2026, 11:42 | 12.9 | 12.9 mg/l |
| 9 Dec 2025, 14:03 | 11.3 | 11.3 mg/l |
| 17 Nov 2025, 11:35 | 12.6 | 12.6 mg/l |
| 30 Oct 2025, 09:49 | 11.8 | 11.8 mg/l |
| 25 Sep 2025, 11:23 | 11.2 | 11.2 mg/l |
| 14 Aug 2025, 10:06 | 9.76 | 9.76 mg/l |
| 10 Jul 2025, 09:45 | 10 | 10 mg/l |
| 27 Jun 2025, 11:56 | 10 | 10 mg/l |
| 13 May 2025, 12:03 | 10.4 | 10.4 mg/l |
| 7 Apr 2025, 14:47 | 12.9 | 12.9 mg/l |
Water temperature
code 0076 · °C
9.1 °C
Sampled 24 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 9.1 | 9.1 °C |
| 24 Feb 2026, 13:11 | 8.2 | 8.2 °C |
| 29 Jan 2026, 11:42 | 5 | 5 °C |
| 9 Dec 2025, 14:03 | 9.8 | 9.8 °C |
| 17 Nov 2025, 11:35 | 6.8 | 6.8 °C |
| 30 Oct 2025, 09:49 | 9 | 9 °C |
| 25 Sep 2025, 11:23 | 11.1 | 11.1 °C |
| 14 Aug 2025, 10:06 | 18.1 | 18.1 °C |
| 10 Jul 2025, 09:45 | 15.8 | 15.8 °C |
| 27 Jun 2025, 11:56 | 15.1 | 15.1 °C |
| 13 May 2025, 12:03 | 14.5 | 14.5 °C |
| 7 Apr 2025, 14:47 | 11.6 | 11.6 °C |
pH
code 0061
7.73
Sampled 24 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 7.73 | 7.73 |
| 24 Feb 2026, 13:11 | 7.63 | 7.63 |
| 29 Jan 2026, 11:42 | 7.73 | 7.73 |
| 9 Dec 2025, 14:03 | 7.49 | 7.49 |
| 17 Nov 2025, 11:35 | 7.69 | 7.69 |
| 30 Oct 2025, 09:49 | 8.02 | 8.02 |
| 25 Sep 2025, 11:23 | 7.75 | 7.75 |
| 14 Aug 2025, 10:06 | 7.93 | 7.93 |
| 10 Jul 2025, 09:45 | 7.81 | 7.81 |
| 27 Jun 2025, 11:56 | 7.97 | 7.97 |
| 13 May 2025, 12:03 | 7.88 | 7.88 |
| 7 Apr 2025, 14:47 | 8.74 | 8.74 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.044 mg/l
Sampled 24 Mar 2026, 7 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 0.044 | 0.044 mg/l |
| 24 Feb 2026, 13:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jan 2026, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2025, 14:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Nov 2025, 11:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Oct 2025, 09:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Sep 2025, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Aug 2025, 10:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jul 2025, 09:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Jun 2025, 11:56 | 0.034 | 0.034 mg/l |
| 13 May 2025, 12:03 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.62 mg/l
Sampled 24 Mar 2026, 7 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 0.62 | 0.62 mg/l |
| 24 Feb 2026, 13:11 | 0.816 | 0.816 mg/l |
| 29 Jan 2026, 11:42 | 0.796 | 0.796 mg/l |
| 9 Dec 2025, 14:03 | 0.786 | 0.786 mg/l |
| 17 Nov 2025, 11:35 | 0.946 | 0.946 mg/l |
| 30 Oct 2025, 09:49 | 0.755 | 0.755 mg/l |
| 25 Sep 2025, 11:23 | 0.656 | 0.656 mg/l |
| 14 Aug 2025, 10:06 | 0.336 | 0.336 mg/l |
| 10 Jul 2025, 09:45 | 0.396 | 0.396 mg/l |
| 27 Jun 2025, 11:56 | 0.526 | 0.526 mg/l |
| 13 May 2025, 12:03 | 0.583 | 0.583 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.025 mg/l
Sampled 24 Mar 2026, 7 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 0.025 | 0.025 mg/l |
| 24 Feb 2026, 13:11 | 0.021 | 0.021 mg/l |
| 29 Jan 2026, 11:42 | 0.018 | 0.018 mg/l |
| 9 Dec 2025, 14:03 | 0.041 | 0.041 mg/l |
| 17 Nov 2025, 11:35 | 0.024 | 0.024 mg/l |
| 30 Oct 2025, 09:49 | 0.025 | 0.025 mg/l |
| 25 Sep 2025, 11:23 | 0.019 | 0.019 mg/l |
| 14 Aug 2025, 10:06 | 0.027 | 0.027 mg/l |
| 10 Jul 2025, 09:45 | 0.028 | 0.028 mg/l |
| 27 Jun 2025, 11:56 | 0.035 | 0.035 mg/l |
| 13 May 2025, 12:03 | 0.018 | 0.018 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
192 µS/cm
Sampled 24 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 11:00 | 192 | 192 µS/cm |
| 24 Feb 2026, 13:11 | 157 | 157 µS/cm |
| 29 Jan 2026, 11:42 | 200 | 200 µS/cm |
| 9 Dec 2025, 14:03 | 127 | 127 µS/cm |
| 17 Nov 2025, 11:35 | 190 | 190 µS/cm |
| 30 Oct 2025, 09:49 | 192 | 192 µS/cm |
| 25 Sep 2025, 11:23 | 197 | 197 µS/cm |
| 14 Aug 2025, 10:06 | 204 | 204 µS/cm |
| 10 Jul 2025, 09:45 | 206 | 206 µS/cm |
| 27 Jun 2025, 11:56 | 210 | 210 µS/cm |
| 13 May 2025, 12:03 | 314 | 314 µS/cm |
| 7 Apr 2025, 14:47 | 318 | 318 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 | 12 | Apr 2025 – Mar 2026 | 103.3% 24 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 12 | Apr 2025 – Mar 2026 | 11.9 mg/l 24 Mar 2026 |
| Temperature of Water 0076 | River water | 12 | Apr 2025 – Mar 2026 | 9.1 °C 24 Mar 2026 |
| pH 0061 | River water | 12 | Apr 2025 – Mar 2026 | 7.73 24 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 11 | May 2025 – Mar 2026 | 0.044 mg/l 24 Mar 2026 |
| Nitrate as N 0117 | River water | 11 | May 2025 – Mar 2026 | 0.62 mg/l 24 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 11 | May 2025 – Mar 2026 | 0.025 mg/l 24 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 12 | Apr 2025 – Mar 2026 | 192 µS/cm 24 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 11 | May 2025 – Mar 2026 | 41 mg/l 24 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 11 | May 2025 – Mar 2026 | 0.00041 mg/l 24 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 11 | May 2025 – Mar 2026 | 2.1 mg/l 24 Mar 2026 |
| Chloride 0172 | River water | 11 | May 2025 – Mar 2026 | 13 mg/l 24 Mar 2026 |
| Nitrite as N 0118 | River water | 11 | May 2025 – Mar 2026 | 0.01 mg/l 24 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 11 | May 2025 – Mar 2026 | 0.63 mg/l 24 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 11 | May 2025 – Mar 2026 | 5.2 mg/l 24 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.