River Alt downstream of Formby sewage treatment works
EA name: RIVER ALT DS FORMBY STW (also listed as “RIVER ALT DOWNSTREAM FORMBY STW”)
Environment Agency sampling point NW-88022899 · 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
- 9 Jul 2026, 12:323 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 12 since 5 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 329443, 405587As 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, 4 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Nearest gauge upstream
- Dovers Bridge On the Dovers Brook · 11 km along the riverKirkby On the River Alt · 16 km along the river
- Why it was sampled
- Monitoring (national agency policy) (10 samples)
Environmental monitoring statutory (EU directives) (2 samples)
Main measurements, river water
pH
code 0061
7.38
Sampled 9 Jul 2026, 3 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:32 | 7.38 | 7.38 |
| 22 Apr 2026, 10:50 | 7.71 | 7.71 |
| 6 Jan 2026, 12:12 | 8.14 | 8.14 |
| 21 Oct 2025, 14:03 | 7.39 | 7.39 |
| 9 Jul 2025, 10:52 | 7.85 | 7.85 |
| 1 Apr 2025, 09:59 | 7.57 | 7.57 |
| 8 Jan 2025, 09:27 | 7.15 | 7.15 |
| 22 Oct 2024, 11:06 | 7.26 | 7.26 |
| 24 Jul 2024, 11:40 | 7.5 | 7.5 |
| 2 Apr 2024, 09:38 | 7.38 | 7.38 |
| 9 Jan 2024, 10:08 | 7.28 | 7.28 |
| 5 Oct 2023, 13:08 | 7.36 | 7.36 |
Everything measured here
5 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 5 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| pH 0061 | River water | 12 | Oct 2023 – Jul 2026 | 7.38 9 Jul 2026 |
| Calcium, Dissolved 0239 | River water | 12 | Oct 2023 – Jul 2026 | 63 mg/l 9 Jul 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 12 | Oct 2023 – Jul 2026 | 8.5 mg/l 9 Jul 2026 |
| Iron, Dissolved 6460 | River water | 12 | Oct 2023 – Jul 2026 | 100 µg/l 9 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 12 | Oct 2023 – Jul 2026 | 13 mg/l 9 Jul 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.