Alt above Liverpool North Sewage Works
EA name: ALT ABOVE LIVERPOOL NORTH SEWAGE WORKS (also listed as “RIVER ALT ABOVE LIVERPOOL NORTH SEWAGE WORKS”)
Environment Agency sampling point NW-88002842 · 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
- 10 Sep 2026, 12:4521 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 24 since 24 Oct 2023 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 340162, 395817As published, to the nearest 1 m. Open in a map
- River, by its own name
- Alt
- River, by the map
- River AltPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Kirkby On the River Alt · 4.3 km along the river
- Why it was sampled
- Monitoring (national agency policy) (18 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
41.7%
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 41.7 | 41.7% |
| 14 Aug 2026, 09:55 | 28.3 | 28.3% |
| 16 Jul 2026, 10:03 | 22.1 | 22.1% |
| 5 Jun 2026, 09:23 | 27.7 | 27.7% |
| 6 May 2026, 10:39 | 46.7 | 46.7% |
| 22 Apr 2026, 12:06 | 59.1 | 59.1% |
| 14 Mar 2025, 09:00 | 56.7 | 56.7% |
| 3 Feb 2025, 10:02 | 76.5 | 76.5% |
| 20 Jan 2025, 13:06 | 64.1 | 64.1% |
| 4 Dec 2024, 09:54 | 63.6 | 63.6% |
| 20 Nov 2024, 09:40 | 70.7 | 70.7% |
| 16 Oct 2024, 11:17 | 70.2 | 70.2% |
| 20 Sep 2024, 11:15 | 45 | 45% |
| 22 Aug 2024, 11:45 | 24.9 | 24.9% |
| 24 Jul 2024, 09:36 | 36.8 | 36.8% |
| 21 Jun 2024, 11:52 | 31 | 31% |
| 13 May 2024, 11:01 | 19.6 | 19.6% |
| 15 Apr 2024, 10:42 | 71.5 | 71.5% |
| 21 Mar 2024, 13:01 | 68.5 | 68.5% |
| 19 Feb 2024, 13:48 | 77.1 | 77.1% |
| 23 Jan 2024, 11:09 | 71.6 | 71.6% |
| 15 Dec 2023, 09:05 | 77.4 | 77.4% |
| 22 Nov 2023, 11:04 | 72.7 | 72.7% |
| 24 Oct 2023, 11:18 | 69.7 | 69.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.27 mg/l
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 4.27 | 4.27 mg/l |
| 14 Aug 2026, 09:55 | 2.67 | 2.67 mg/l |
| 16 Jul 2026, 10:03 | 2.13 | 2.13 mg/l |
| 5 Jun 2026, 09:23 | 2.92 | 2.92 mg/l |
| 6 May 2026, 10:39 | 5.27 | 5.27 mg/l |
| 22 Apr 2026, 12:06 | 6.75 | 6.75 mg/l |
| 14 Mar 2025, 09:00 | 7.08 | 7.08 mg/l |
| 3 Feb 2025, 10:02 | 9.46 | 9.46 mg/l |
| 20 Jan 2025, 13:06 | 7.91 | 7.91 mg/l |
| 4 Dec 2024, 09:54 | 7.6 | 7.6 mg/l |
| 20 Nov 2024, 09:40 | 8.36 | 8.36 mg/l |
| 16 Oct 2024, 11:17 | 7.28 | 7.28 mg/l |
| 20 Sep 2024, 11:15 | 4.64 | 4.64 mg/l |
| 22 Aug 2024, 11:45 | 2.49 | 2.49 mg/l |
| 24 Jul 2024, 09:36 | 3.73 | 3.73 mg/l |
| 21 Jun 2024, 11:52 | 3.18 | 3.18 mg/l |
| 13 May 2024, 11:01 | 2 | 2 mg/l |
| 15 Apr 2024, 10:42 | 8.19 | 8.19 mg/l |
| 21 Mar 2024, 13:01 | 7.85 | 7.85 mg/l |
| 19 Feb 2024, 13:48 | 8.81 | 8.81 mg/l |
| 23 Jan 2024, 11:09 | 8.7 | 8.7 mg/l |
| 15 Dec 2023, 09:05 | 9.06 | 9.06 mg/l |
| 22 Nov 2023, 11:04 | 8.13 | 8.13 mg/l |
| 24 Oct 2023, 11:18 | 7.44 | 7.44 mg/l |
Water temperature
code 0076 · °C
14.2 °C
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 14.2 | 14.2 °C |
| 14 Aug 2026, 09:55 | 18.1 | 18.1 °C |
| 16 Jul 2026, 10:03 | 16.9 | 16.9 °C |
| 5 Jun 2026, 09:23 | 12.8 | 12.8 °C |
| 6 May 2026, 10:39 | 9.9 | 9.9 °C |
| 22 Apr 2026, 12:06 | 9.4 | 9.4 °C |
| 14 Mar 2025, 09:00 | 5.8 | 5.8 °C |
| 3 Feb 2025, 10:02 | 6.2 | 6.2 °C |
| 20 Jan 2025, 13:06 | 6.3 | 6.3 °C |
| 4 Dec 2024, 09:54 | 7.6 | 7.6 °C |
| 20 Nov 2024, 09:40 | 8 | 8 °C |
| 16 Oct 2024, 11:17 | 13.6 | 13.6 °C |
| 20 Sep 2024, 11:15 | 13.9 | 13.9 °C |
| 22 Aug 2024, 11:45 | 15.2 | 15.2 °C |
| 24 Jul 2024, 09:36 | 14.6 | 14.6 °C |
| 21 Jun 2024, 11:52 | 14.1 | 14.1 °C |
| 13 May 2024, 11:01 | 14.4 | 14.4 °C |
| 15 Apr 2024, 10:42 | 9.3 | 9.3 °C |
| 21 Mar 2024, 13:01 | 9.3 | 9.3 °C |
| 19 Feb 2024, 13:48 | 9.4 | 9.4 °C |
| 23 Jan 2024, 11:09 | 6.9 | 6.9 °C |
| 15 Dec 2023, 09:05 | 8.4 | 8.4 °C |
| 22 Nov 2023, 11:04 | 10.3 | 10.3 °C |
| 24 Oct 2023, 11:18 | 12.3 | 12.3 °C |
pH
code 0061
7.53
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 7.53 | 7.53 |
| 14 Aug 2026, 09:55 | 7.79 | 7.79 |
| 16 Jul 2026, 10:03 | 7.67 | 7.67 |
| 5 Jun 2026, 09:23 | 7.47 | 7.47 |
| 6 May 2026, 10:39 | 7.65 | 7.65 |
| 22 Apr 2026, 12:06 | 7.64 | 7.64 |
| 14 Mar 2025, 09:00 | 7.74 | 7.74 |
| 3 Feb 2025, 10:02 | 7.65 | 7.65 |
| 20 Jan 2025, 13:06 | 7.59 | 7.59 |
| 4 Dec 2024, 09:54 | 7.56 | 7.56 |
| 20 Nov 2024, 09:40 | 7.57 | 7.57 |
| 16 Oct 2024, 11:17 | 7.44 | 7.44 |
| 20 Sep 2024, 11:15 | 7.65 | 7.65 |
| 22 Aug 2024, 11:45 | 7.63 | 7.63 |
| 24 Jul 2024, 09:36 | 7.88 | 7.88 |
| 21 Jun 2024, 11:52 | 7.74 | 7.74 |
| 13 May 2024, 11:01 | 7.49 | 7.49 |
| 15 Apr 2024, 10:42 | 7.68 | 7.68 |
| 21 Mar 2024, 13:01 | 7.64 | 7.64 |
| 19 Feb 2024, 13:48 | 7.48 | 7.48 |
| 23 Jan 2024, 11:09 | 7.68 | 7.68 |
| 15 Dec 2023, 09:05 | 7.62 | 7.62 |
| 22 Nov 2023, 11:04 | 7.5 | 7.5 |
| 24 Oct 2023, 11:18 | 7.42 | 7.42 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.17 mg/l
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 0.17 | 0.17 mg/l |
| 14 Aug 2026, 09:55 | 4.8 | 4.8 mg/l |
| 16 Jul 2026, 10:03 | 0.6 | 0.6 mg/l |
| 5 Jun 2026, 09:23 | 0.27 | 0.27 mg/l |
| 6 May 2026, 10:39 | 0.47 | 0.47 mg/l |
| 22 Apr 2026, 12:06 | 0.28 | 0.28 mg/l |
| 14 Mar 2025, 09:00 | 0.54 | 0.54 mg/l |
| 3 Feb 2025, 10:02 | 0.17 | 0.17 mg/l |
| 20 Jan 2025, 13:06 | 0.2 | 0.2 mg/l |
| 4 Dec 2024, 09:54 | 0.25 | 0.25 mg/l |
| 20 Nov 2024, 09:40 | 0.13 | 0.13 mg/l |
| 16 Oct 2024, 11:17 | 0.085 | 0.085 mg/l |
| 20 Sep 2024, 11:15 | 0.32 | 0.32 mg/l |
| 22 Aug 2024, 11:45 | 0.41 | 0.41 mg/l |
| 24 Jul 2024, 09:36 | 0.27 | 0.27 mg/l |
| 21 Jun 2024, 11:52 | 0.36 | 0.36 mg/l |
| 13 May 2024, 11:01 | 2.2 | 2.2 mg/l |
| 15 Apr 2024, 10:42 | 0.3 | 0.3 mg/l |
| 21 Mar 2024, 13:01 | 0.21 | 0.21 mg/l |
| 19 Feb 2024, 13:48 | 0.17 | 0.17 mg/l |
| 23 Jan 2024, 11:09 | 0.32 | 0.32 mg/l |
| 15 Dec 2023, 09:05 | 0.13 | 0.13 mg/l |
| 22 Nov 2023, 11:04 | 0.14 | 0.14 mg/l |
| 24 Oct 2023, 11:18 | 0.1 | 0.1 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.02 mg/l
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 2.02 | 2.02 mg/l |
| 14 Aug 2026, 09:55 | 0.237 | 0.237 mg/l |
| 16 Jul 2026, 10:03 | 0.89 | 0.89 mg/l |
| 5 Jun 2026, 09:23 | 1.3 | 1.3 mg/l |
| 6 May 2026, 10:39 | 1.7 | 1.7 mg/l |
| 22 Apr 2026, 12:06 | 1.64 | 1.64 mg/l |
| 14 Mar 2025, 09:00 | 1.83 | 1.83 mg/l |
| 3 Feb 2025, 10:02 | 1.57 | 1.57 mg/l |
| 20 Jan 2025, 13:06 | 1.75 | 1.75 mg/l |
| 4 Dec 2024, 09:54 | 1.36 | 1.36 mg/l |
| 20 Nov 2024, 09:40 | 1.66 | 1.66 mg/l |
| 16 Oct 2024, 11:17 | 0.893 | 0.893 mg/l |
| 20 Sep 2024, 11:15 | 2.11 | 2.11 mg/l |
| 22 Aug 2024, 11:45 | 1.71 | 1.71 mg/l |
| 24 Jul 2024, 09:36 | 1.6 | 1.6 mg/l |
| 21 Jun 2024, 11:52 | 1.78 | 1.78 mg/l |
| 13 May 2024, 11:01 | 0.17 | 0.17 mg/l |
| 15 Apr 2024, 10:42 | 0.966 | 0.966 mg/l |
| 21 Mar 2024, 13:01 | 1.36 | 1.36 mg/l |
| 19 Feb 2024, 13:48 | 1.57 | 1.57 mg/l |
| 23 Jan 2024, 11:09 | 1.55 | 1.55 mg/l |
| 15 Dec 2023, 09:05 | 1.46 | 1.46 mg/l |
| 22 Nov 2023, 11:04 | 1.26 | 1.26 mg/l |
| 24 Oct 2023, 11:18 | 1.57 | 1.57 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.24 mg/l
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 0.24 | 0.24 mg/l |
| 14 Aug 2026, 09:55 | 1.7 | 1.7 mg/l |
| 16 Jul 2026, 10:03 | 0.64 | 0.64 mg/l |
| 5 Jun 2026, 09:23 | 0.42 | 0.42 mg/l |
| 6 May 2026, 10:39 | 0.34 | 0.34 mg/l |
| 22 Apr 2026, 12:06 | 0.28 | 0.28 mg/l |
| 14 Mar 2025, 09:00 | 0.22 | 0.22 mg/l |
| 3 Feb 2025, 10:02 | 0.12 | 0.12 mg/l |
| 20 Jan 2025, 13:06 | 0.13 | 0.13 mg/l |
| 4 Dec 2024, 09:54 | 0.13 | 0.13 mg/l |
| 20 Nov 2024, 09:40 | 0.12 | 0.12 mg/l |
| 16 Oct 2024, 11:17 | 0.1 | 0.1 mg/l |
| 20 Sep 2024, 11:15 | 0.24 | 0.24 mg/l |
| 22 Aug 2024, 11:45 | 0.36 | 0.36 mg/l |
| 24 Jul 2024, 09:36 | 0.24 | 0.24 mg/l |
| 21 Jun 2024, 11:52 | 0.27 | 0.27 mg/l |
| 13 May 2024, 11:01 | 0.52 | 0.52 mg/l |
| 15 Apr 2024, 10:42 | 0.086 | 0.086 mg/l |
| 21 Mar 2024, 13:01 | 0.12 | 0.12 mg/l |
| 19 Feb 2024, 13:48 | 0.1 | 0.1 mg/l |
| 23 Jan 2024, 11:09 | 0.096 | 0.096 mg/l |
| 15 Dec 2023, 09:05 | 0.091 | 0.091 mg/l |
| 22 Nov 2023, 11:04 | 0.12 | 0.12 mg/l |
| 24 Oct 2023, 11:18 | 0.12 | 0.12 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
521 µS/cm
Sampled 10 Sep 2026, 21 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 12:45 | 521 | 521 µS/cm |
| 14 Aug 2026, 09:55 | 697 | 697 µS/cm |
| 16 Jul 2026, 10:03 | 704 | 704 µS/cm |
| 5 Jun 2026, 09:23 | 600 | 600 µS/cm |
| 6 May 2026, 10:39 | 726 | 726 µS/cm |
| 22 Apr 2026, 12:06 | 735 | 735 µS/cm |
| 14 Mar 2025, 09:00 | 850 | 850 µS/cm |
| 3 Feb 2025, 10:02 | 712 | 712 µS/cm |
| 20 Jan 2025, 13:06 | 725 | 725 µS/cm |
| 4 Dec 2024, 09:54 | 602 | 602 µS/cm |
| 20 Nov 2024, 09:40 | 685 | 685 µS/cm |
| 16 Oct 2024, 11:17 | 240 | 240 µS/cm |
| 20 Sep 2024, 11:15 | 725 | 725 µS/cm |
| 22 Aug 2024, 11:45 | 716 | 716 µS/cm |
| 24 Jul 2024, 09:36 | 723 | 723 µS/cm |
| 21 Jun 2024, 11:52 | 737 | 737 µS/cm |
| 13 May 2024, 11:01 | 556 | 556 µS/cm |
| 15 Apr 2024, 10:42 | 426 | 426 µS/cm |
| 21 Mar 2024, 13:01 | 614 | 614 µS/cm |
| 19 Feb 2024, 13:48 | 566 | 566 µS/cm |
| 23 Jan 2024, 11:09 | 738 | 738 µS/cm |
| 15 Dec 2023, 09:05 | 609 | 609 µS/cm |
| 22 Nov 2023, 11:04 | 588 | 588 µS/cm |
| 24 Oct 2023, 11:18 | 595 | 595 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 | 24 | Oct 2023 – Sep 2026 | 41.7% 10 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Oct 2023 – Sep 2026 | 4.27 mg/l 10 Sep 2026 |
| Temperature of Water 0076 | River water | 24 | Oct 2023 – Sep 2026 | 14.2 °C 10 Sep 2026 |
| pH 0061 | River water | 24 | Oct 2023 – Sep 2026 | 7.53 10 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Oct 2023 – Sep 2026 | 0.17 mg/l 10 Sep 2026 |
| Nitrate as N 0117 | River water | 24 | Oct 2023 – Sep 2026 | 2.02 mg/l 10 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Oct 2023 – Sep 2026 | 0.24 mg/l 10 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Oct 2023 – Sep 2026 | 521 µS/cm 10 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Oct 2023 – Sep 2026 | 160 mg/l 10 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Oct 2023 – Sep 2026 | 0.00145 mg/l 10 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 14 | Feb 2024 – Mar 2025 | 2.9 mg/l 14 Mar 2025 |
| Nitrite as N 0118 | River water | 24 | Oct 2023 – Sep 2026 | 0.085 mg/l 10 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Oct 2023 – Sep 2026 | 2.1 mg/l 10 Sep 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.