Isbourne River Postlip House
EA name: ISBOURNE RIVER POSTLIP HOUSE
Environment Agency sampling point MD-07429100 · 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
- 27 May 2026, 10:434 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 24 since 18 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 401640, 227410As published, to the nearest 10 m. Open in a map
- River, by its own name
- Isbourne
- River, by the map
- River IsbournePlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Toddington On the River Isbourne · 7.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.6%
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 95.6 | 95.6% |
| 8 Apr 2026, 12:31 | 104.6 | 104.6% |
| 19 Mar 2026, 11:43 | 99.2 | 99.2% |
| 5 Feb 2026, 12:01 | 100.6 | 100.6% |
| 26 Jan 2026, 14:09 | 99.5 | 99.5% |
| 12 Dec 2025, 11:05 | 96.5 | 96.5% |
| 12 Mar 2025, 10:07 | 98.9 | 98.9% |
| 26 Feb 2025, 12:04 | 96.9 | 96.9% |
| 29 Jan 2025, 12:52 | 100.8 | 100.8% |
| 2 Dec 2024, 09:38 | 99.3 | 99.3% |
| 19 Nov 2024, 13:12 | 99.1 | 99.1% |
| 23 Oct 2024, 10:58 | 100.3 | 100.3% |
| 26 Sep 2024, 10:49 | 93.4 | 93.4% |
| 24 Jul 2024, 11:49 | 98.4 | 98.4% |
| 17 Jun 2024, 11:07 | 100 | 100% |
| 15 May 2024, 12:26 | 103.4 | 103.4% |
| 17 Apr 2024, 11:23 | 101.5 | 101.5% |
| 19 Mar 2024, 13:41 | 104.1 | 104.1% |
| 20 Feb 2024, 09:44 | 95.3 | 95.3% |
| 18 Jan 2024, 09:49 | 99.6 | 99.6% |
| 11 Dec 2023, 09:53 | 97.8 | 97.8% |
| 27 Nov 2023, 08:38 | 98.1 | 98.1% |
| 26 Oct 2023, 09:37 | 99.8 | 99.8% |
| 18 Oct 2023, 07:05 | 94.9 | 94.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.1 mg/l
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 9.1 | 9.1 mg/l |
| 8 Apr 2026, 12:31 | 10.8 | 10.8 mg/l |
| 19 Mar 2026, 11:43 | 11.1 | 11.1 mg/l |
| 5 Feb 2026, 12:01 | 11.8 | 11.8 mg/l |
| 26 Jan 2026, 14:09 | 11.6 | 11.6 mg/l |
| 12 Dec 2025, 11:05 | 10.7 | 10.7 mg/l |
| 12 Mar 2025, 10:07 | 12 | 12 mg/l |
| 26 Feb 2025, 12:04 | 11.3 | 11.3 mg/l |
| 29 Jan 2025, 12:52 | 11.8 | 11.8 mg/l |
| 2 Dec 2024, 09:38 | 11.2 | 11.2 mg/l |
| 19 Nov 2024, 13:12 | 11.9 | 11.9 mg/l |
| 23 Oct 2024, 10:58 | 11.1 | 11.1 mg/l |
| 26 Sep 2024, 10:49 | 9.64 | 9.64 mg/l |
| 24 Jul 2024, 11:49 | 9.77 | 9.77 mg/l |
| 17 Jun 2024, 11:07 | 10.7 | 10.7 mg/l |
| 15 May 2024, 12:26 | 10.7 | 10.7 mg/l |
| 17 Apr 2024, 11:23 | 11.7 | 11.7 mg/l |
| 19 Mar 2024, 13:41 | 11.3 | 11.3 mg/l |
| 20 Feb 2024, 09:44 | 10.9 | 10.9 mg/l |
| 18 Jan 2024, 09:49 | 12.4 | 12.4 mg/l |
| 11 Dec 2023, 09:53 | 11.2 | 11.2 mg/l |
| 27 Nov 2023, 08:38 | 11.2 | 11.2 mg/l |
| 26 Oct 2023, 09:37 | 11.1 | 11.1 mg/l |
| 18 Oct 2023, 07:05 | 10.4 | 10.4 mg/l |
Water temperature
code 0076 · °C
17.6 °C
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 17.6 | 17.6 °C |
| 8 Apr 2026, 12:31 | 13.8 | 13.8 °C |
| 19 Mar 2026, 11:43 | 10.3 | 10.3 °C |
| 5 Feb 2026, 12:01 | 8.5 | 8.5 °C |
| 26 Jan 2026, 14:09 | 8.7 | 8.7 °C |
| 12 Dec 2025, 11:05 | 10.5 | 10.5 °C |
| 12 Mar 2025, 10:07 | 7.1 | 7.1 °C |
| 26 Feb 2025, 12:04 | 8.5 | 8.5 °C |
| 29 Jan 2025, 12:52 | 8.4 | 8.4 °C |
| 2 Dec 2024, 09:38 | 10.1 | 10.1 °C |
| 19 Nov 2024, 13:12 | 7.5 | 7.5 °C |
| 23 Oct 2024, 10:58 | 10.9 | 10.9 °C |
| 26 Sep 2024, 10:49 | 13.8 | 13.8 °C |
| 24 Jul 2024, 11:49 | 15.6 | 15.6 °C |
| 17 Jun 2024, 11:07 | 12.3 | 12.3 °C |
| 15 May 2024, 12:26 | 13.9 | 13.9 °C |
| 17 Apr 2024, 11:23 | 9.1 | 9.1 °C |
| 19 Mar 2024, 13:41 | 11.6 | 11.6 °C |
| 20 Feb 2024, 09:44 | 9.5 | 9.5 °C |
| 18 Jan 2024, 09:49 | 5.9 | 5.9 °C |
| 11 Dec 2023, 09:53 | 9.4 | 9.4 °C |
| 27 Nov 2023, 08:38 | 9.3 | 9.3 °C |
| 26 Oct 2023, 09:37 | 10.6 | 10.6 °C |
| 18 Oct 2023, 07:05 | 11.2 | 11.2 °C |
pH
code 0061
8.26
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 8.26 | 8.26 |
| 8 Apr 2026, 12:31 | 8.37 | 8.37 |
| 19 Mar 2026, 11:43 | 8.16 | 8.16 |
| 5 Feb 2026, 12:01 | 8.28 | 8.28 |
| 26 Jan 2026, 14:09 | 8.27 | 8.27 |
| 12 Dec 2025, 11:05 | 8.06 | 8.06 |
| 12 Mar 2025, 10:07 | 8.26 | 8.26 |
| 26 Feb 2025, 12:04 | 8.33 | 8.33 |
| 29 Jan 2025, 12:52 | 8.15 | 8.15 |
| 2 Dec 2024, 09:38 | 8 | 8 |
| 19 Nov 2024, 13:12 | 8.29 | 8.29 |
| 23 Oct 2024, 10:58 | 8.18 | 8.18 |
| 26 Sep 2024, 10:49 | 8.03 | 8.03 |
| 24 Jul 2024, 11:49 | 8.02 | 8.02 |
| 17 Jun 2024, 11:07 | 8.23 | 8.23 |
| 15 May 2024, 12:26 | 8.26 | 8.26 |
| 17 Apr 2024, 11:23 | 8.18 | 8.18 |
| 19 Mar 2024, 13:41 | 8.2 | 8.2 |
| 20 Feb 2024, 09:44 | 8.18 | 8.18 |
| 18 Jan 2024, 09:49 | 8.36 | 8.36 |
| 11 Dec 2023, 09:53 | 8.21 | 8.21 |
| 27 Nov 2023, 08:38 | 8.21 | 8.21 |
| 26 Oct 2023, 09:37 | 8.03 | 8.03 |
| 18 Oct 2023, 07:05 | 7.89 | 7.89 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.055 mg/l
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 0.055 | 0.055 mg/l |
| 8 Apr 2026, 12:31 | 0.031 | 0.031 mg/l |
| 19 Mar 2026, 11:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2026, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Jan 2026, 14:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Dec 2025, 11:05 | 0.064 | 0.064 mg/l |
| 12 Mar 2025, 10:07 | 0.032 | 0.032 mg/l |
| 26 Feb 2025, 12:04 | 0.043 | 0.043 mg/l |
| 29 Jan 2025, 12:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2024, 09:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Nov 2024, 13:12 | 0.042 | 0.042 mg/l |
| 23 Oct 2024, 10:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Sep 2024, 10:49 | 0.041 | 0.041 mg/l |
| 24 Jul 2024, 11:49 | 0.045 | 0.045 mg/l |
| 17 Jun 2024, 11:07 | 0.044 | 0.044 mg/l |
| 15 May 2024, 12:26 | 0.033 | 0.033 mg/l |
| 17 Apr 2024, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2024, 13:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Feb 2024, 09:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jan 2024, 09:49 | 0.035 | 0.035 mg/l |
| 11 Dec 2023, 09:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Nov 2023, 08:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Oct 2023, 09:37 | 0.049 | 0.049 mg/l |
| 18 Oct 2023, 07:05 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.85 mg/l
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 2.85 | 2.85 mg/l |
| 8 Apr 2026, 12:31 | 3.49 | 3.49 mg/l |
| 19 Mar 2026, 11:43 | 3.69 | 3.69 mg/l |
| 5 Feb 2026, 12:01 | 3.89 | 3.89 mg/l |
| 26 Jan 2026, 14:09 | 3.78 | 3.78 mg/l |
| 12 Dec 2025, 11:05 | 3.47 | 3.47 mg/l |
| 12 Mar 2025, 10:07 | 3.69 | 3.69 mg/l |
| 26 Feb 2025, 12:04 | 3.19 | 3.19 mg/l |
| 29 Jan 2025, 12:52 | 3.79 | 3.79 mg/l |
| 2 Dec 2024, 09:38 | 3.49 | 3.49 mg/l |
| 19 Nov 2024, 13:12 | 3.49 | 3.49 mg/l |
| 23 Oct 2024, 10:58 | 3.69 | 3.69 mg/l |
| 26 Sep 2024, 10:49 | 2.29 | 2.29 mg/l |
| 24 Jul 2024, 11:49 | 3.38 | 3.38 mg/l |
| 17 Jun 2024, 11:07 | 3.58 | 3.58 mg/l |
| 15 May 2024, 12:26 | 3.48 | 3.48 mg/l |
| 17 Apr 2024, 11:23 | 3.89 | 3.89 mg/l |
| 19 Mar 2024, 13:41 | 3.89 | 3.89 mg/l |
| 20 Feb 2024, 09:44 | 4.08 | 4.08 mg/l |
| 18 Jan 2024, 09:49 | 3.89 | 3.89 mg/l |
| 11 Dec 2023, 09:53 | 3.89 | 3.89 mg/l |
| 27 Nov 2023, 08:38 | 3.19 | 3.19 mg/l |
| 26 Oct 2023, 09:37 | 3.18 | 3.18 mg/l |
| 18 Oct 2023, 07:05 | 2.88 | 2.88 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.02 mg/l
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 0.02 | 0.02 mg/l |
| 8 Apr 2026, 12:31 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Mar 2026, 11:43 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Feb 2026, 12:01 | 0.021 | 0.021 mg/l |
| 26 Jan 2026, 14:09 | 0.012 | 0.012 mg/l |
| 12 Dec 2025, 11:05 | 0.021 | 0.021 mg/l |
| 12 Mar 2025, 10:07 | <0.01 | below 0.01 mg/l (not detected above this) |
| 26 Feb 2025, 12:04 | 0.031 | 0.031 mg/l |
| 29 Jan 2025, 12:52 | 0.012 | 0.012 mg/l |
| 2 Dec 2024, 09:38 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Nov 2024, 13:12 | 0.023 | 0.023 mg/l |
| 23 Oct 2024, 10:58 | <0.01 | below 0.01 mg/l (not detected above this) |
| 26 Sep 2024, 10:49 | 0.062 | 0.062 mg/l |
| 24 Jul 2024, 11:49 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Jun 2024, 11:07 | <0.01 | below 0.01 mg/l (not detected above this) |
| 15 May 2024, 12:26 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Apr 2024, 11:23 | 0.01 | 0.01 mg/l |
| 19 Mar 2024, 13:41 | 0.01 | 0.01 mg/l |
| 20 Feb 2024, 09:44 | 0.018 | 0.018 mg/l |
| 18 Jan 2024, 09:49 | <0.01 | below 0.01 mg/l (not detected above this) |
| 11 Dec 2023, 09:53 | 0.017 | 0.017 mg/l |
| 27 Nov 2023, 08:38 | <0.01 | below 0.01 mg/l (not detected above this) |
| 26 Oct 2023, 09:37 | 0.016 | 0.016 mg/l |
| 18 Oct 2023, 07:05 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
534 µS/cm
Sampled 27 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:43 | 534 | 534 µS/cm |
| 8 Apr 2026, 12:31 | 499 | 499 µS/cm |
| 19 Mar 2026, 11:43 | 457 | 457 µS/cm |
| 5 Feb 2026, 12:01 | 462 | 462 µS/cm |
| 26 Jan 2026, 14:09 | 519 | 519 µS/cm |
| 12 Dec 2025, 11:05 | 621 | 621 µS/cm |
| 12 Mar 2025, 10:07 | 493 | 493 µS/cm |
| 26 Feb 2025, 12:04 | 480 | 480 µS/cm |
| 29 Jan 2025, 12:52 | 505 | 505 µS/cm |
| 2 Dec 2024, 09:38 | 518 | 518 µS/cm |
| 19 Nov 2024, 13:12 | 511 | 511 µS/cm |
| 23 Oct 2024, 10:58 | 463 | 463 µS/cm |
| 26 Sep 2024, 10:49 | 490 | 490 µS/cm |
| 24 Jul 2024, 11:49 | 494 | 494 µS/cm |
| 17 Jun 2024, 11:07 | 469 | 469 µS/cm |
| 15 May 2024, 12:26 | 512 | 512 µS/cm |
| 17 Apr 2024, 11:23 | 457 | 457 µS/cm |
| 19 Mar 2024, 13:41 | 479 | 479 µS/cm |
| 20 Feb 2024, 09:44 | 530 | 530 µS/cm |
| 18 Jan 2024, 09:49 | 523 | 523 µS/cm |
| 11 Dec 2023, 09:53 | 546 | 546 µS/cm |
| 27 Nov 2023, 08:38 | 513 | 513 µS/cm |
| 26 Oct 2023, 09:37 | 540 | 540 µS/cm |
| 18 Oct 2023, 07:05 | 634 | 634 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 – May 2026 | 95.6% 27 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Oct 2023 – May 2026 | 9.1 mg/l 27 May 2026 |
| Temperature of Water 0076 | River water | 24 | Oct 2023 – May 2026 | 17.6 °C 27 May 2026 |
| pH 0061 | River water | 24 | Oct 2023 – May 2026 | 8.26 27 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Oct 2023 – May 2026 | 0.055 mg/l 27 May 2026 |
| Nitrate as N 0117 | River water | 24 | Oct 2023 – May 2026 | 2.85 mg/l 27 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Oct 2023 – May 2026 | 0.02 mg/l 27 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Oct 2023 – May 2026 | 534 µS/cm 27 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Oct 2023 – May 2026 | 150 mg/l 27 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Oct 2023 – May 2026 | 0.00174 mg/l 27 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Oct 2023 – May 2026 | 1.5 mg/l 27 May 2026 |
| Nitrite as N 0118 | River water | 24 | Oct 2023 – May 2026 | 0.055 mg/l 27 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Oct 2023 – May 2026 | 2.9 mg/l 27 May 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.