Chilton Brook Folly Road Bridge Chilton St
EA name: CHILTON BK.FOLLY RD.BR.CHILTON ST
Environment Agency sampling point AN-ST0942 · 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 Aug 2026, 12:0352 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 11 since 10 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 575770, 246965As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Chilton StreamPlaced by position alone, on a line whose map name differs from its own, 4 m from the line.
- Next gauge downstream
- Westmill On the River Stour · 11 km along the river
- Why it was sampled
- Monitoring (national agency policy) (11 samples)
1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
101.7%
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 101.7 | 101.7% |
| 17 Jun 2026, 14:47 | 117.6 | 117.6% |
| 28 May 2026, 12:34 | 158.4 | 158.4% |
| 20 Apr 2026, 11:00 | 111.7 | 111.7% |
| 7 Mar 2024, 11:25 | 101.8 | 101.8% |
| 2 Feb 2024, 10:03 | 96.7 | 96.7% |
| 4 Jan 2024, 13:13 | 98.5 | 98.5% |
| 8 Dec 2023, 10:39 | 97.7 | 97.7% |
| 9 Nov 2023, 10:40 | 97.9 | 97.9% |
| 10 Oct 2023, 14:40 | 81.1 | 81.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.56 mg/l
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 8.56 | 8.56 mg/l |
| 17 Jun 2026, 14:47 | 10.5 | 10.5 mg/l |
| 28 May 2026, 12:34 | 14 | 14 mg/l |
| 20 Apr 2026, 11:00 | 12.3 | 12.3 mg/l |
| 7 Mar 2024, 11:25 | 12.1 | 12.1 mg/l |
| 2 Feb 2024, 10:03 | 12.3 | 12.3 mg/l |
| 4 Jan 2024, 13:13 | 11.7 | 11.7 mg/l |
| 8 Dec 2023, 10:39 | 12.1 | 12.1 mg/l |
| 9 Nov 2023, 10:40 | 11.2 | 11.2 mg/l |
| 10 Oct 2023, 14:40 | 7.98 | 7.98 mg/l |
Water temperature
code 0076 · °C
23.9 °C
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 23.9 | 23.9 °C |
| 17 Jun 2026, 14:47 | 20.6 | 20.6 °C |
| 28 May 2026, 12:34 | 21.3 | 21.3 °C |
| 20 Apr 2026, 11:00 | 10.9 | 10.9 °C |
| 7 Mar 2024, 11:25 | 7.7 | 7.7 °C |
| 2 Feb 2024, 10:03 | 5 | 5 °C |
| 4 Jan 2024, 13:13 | 7.9 | 7.9 °C |
| 8 Dec 2023, 10:39 | 6.3 | 6.3 °C |
| 9 Nov 2023, 10:40 | 9.2 | 9.2 °C |
| 10 Oct 2023, 14:40 | 16 | 16 °C |
pH
code 0061
7.94
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 7.94 | 7.94 |
| 17 Jun 2026, 14:47 | 8.09 | 8.09 |
| 28 May 2026, 12:34 | 8.4 | 8.4 |
| 20 Apr 2026, 11:00 | 8.29 | 8.29 |
| 7 Mar 2024, 11:25 | 8.31 | 8.31 |
| 2 Feb 2024, 10:03 | 8.32 | 8.32 |
| 4 Jan 2024, 13:13 | 8.24 | 8.24 |
| 8 Dec 2023, 10:39 | 8.12 | 8.12 |
| 9 Nov 2023, 10:40 | 8.17 | 8.17 |
| 10 Oct 2023, 14:40 | 7.94 | 7.94 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.32 mg/l
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 0.32 | 0.32 mg/l |
| 17 Jun 2026, 14:47 | 0.12 | 0.12 mg/l |
| 28 May 2026, 12:34 | 0.097 | 0.097 mg/l |
| 20 Apr 2026, 11:00 | 0.067 | 0.067 mg/l |
| 7 Mar 2024, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2024, 10:03 | 0.034 | 0.034 mg/l |
| 4 Jan 2024, 13:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Dec 2023, 10:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Nov 2023, 10:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Oct 2023, 14:40 | 0.035 | 0.035 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.15 mg/l
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 1.15 | 1.15 mg/l |
| 17 Jun 2026, 14:47 | 8.1 | 8.1 mg/l |
| 28 May 2026, 12:34 | 8.84 | 8.84 mg/l |
| 20 Apr 2026, 11:00 | 10.9 | 10.9 mg/l |
| 7 Mar 2024, 11:25 | 7.59 | 7.59 mg/l |
| 2 Feb 2024, 10:03 | 8.08 | 8.08 mg/l |
| 4 Jan 2024, 13:13 | 8.39 | 8.39 mg/l |
| 8 Dec 2023, 10:39 | 11 | 11 mg/l |
| 9 Nov 2023, 10:40 | 9.49 | 9.49 mg/l |
| 10 Oct 2023, 14:40 | 3.07 | 3.07 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
1.1 mg/l
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 1.1 | 1.1 mg/l |
| 17 Jun 2026, 14:47 | 0.44 | 0.44 mg/l |
| 28 May 2026, 12:34 | 0.23 | 0.23 mg/l |
| 20 Apr 2026, 11:00 | 0.11 | 0.11 mg/l |
| 7 Mar 2024, 11:25 | 0.1 | 0.1 mg/l |
| 2 Feb 2024, 10:03 | 0.32 | 0.32 mg/l |
| 4 Jan 2024, 13:13 | 0.079 | 0.079 mg/l |
| 8 Dec 2023, 10:39 | 0.072 | 0.072 mg/l |
| 9 Nov 2023, 10:40 | 0.11 | 0.11 mg/l |
| 10 Oct 2023, 14:40 | 1.6 | 1.6 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1170 µS/cm
Sampled 9 Jul 2026, 3 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jul 2026, 12:35 | 1170 | 1170 µS/cm |
| 17 Jun 2026, 14:47 | 1223 | 1223 µS/cm |
| 28 May 2026, 12:34 | 1158 | 1158 µS/cm |
| 20 Apr 2026, 11:00 | 1046 | 1046 µS/cm |
| 7 Mar 2024, 11:25 | 736 | 736 µS/cm |
| 2 Feb 2024, 10:03 | 816 | 816 µS/cm |
| 4 Jan 2024, 13:13 | 684 | 684 µS/cm |
| 8 Dec 2023, 10:39 | 666 | 666 µS/cm |
| 9 Nov 2023, 10:40 | 725 | 725 µS/cm |
| 10 Oct 2023, 14:40 | 1015 | 1015 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 10 | Oct 2023 – Jul 2026 | 101.7% 9 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Oct 2023 – Jul 2026 | 8.56 mg/l 9 Jul 2026 |
| Temperature of Water 0076 | River water | 10 | Oct 2023 – Jul 2026 | 23.9 °C 9 Jul 2026 |
| pH 0061 | River water | 10 | Oct 2023 – Jul 2026 | 7.94 9 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 10 | Oct 2023 – Jul 2026 | 0.32 mg/l 9 Jul 2026 |
| Nitrate as N 0117 | River water | 10 | Oct 2023 – Jul 2026 | 1.15 mg/l 9 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 10 | Oct 2023 – Jul 2026 | 1.1 mg/l 9 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 10 | Oct 2023 – Jul 2026 | 1170 µS/cm 9 Jul 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 10 | Oct 2023 – Jul 2026 | 330 mg/l 9 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 10 | Oct 2023 – Jul 2026 | 0.014 mg/l 9 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 6 | Oct 2023 – Mar 2024 | 1.2 mg/l 7 Mar 2024 |
| Nitrite as N 0118 | River water | 10 | Oct 2023 – Jul 2026 | 0.15 mg/l 9 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 10 | Oct 2023 – Jul 2026 | 1.3 mg/l 9 Jul 2026 |
| No flow /No sample 7668 | River water | 1 | Aug 2026 – Aug 2026 | No flow/discharge at sampling point 10 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.