Arnold and Riston Drain
EA name: ARNOLD AND RISTON DRAIN (also listed as “RSN0224 ARNOLD AND RISTON DRAIN”)
Environment Agency sampling point NE-RSN0224 · 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
- 22 Oct 2024, 10:4023 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
- 11 since 11 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 510280, 439838As published, to the nearest 1 m. Open in a map
- River, by its own name
- Arnold Riston Drain
- River, by the map
- Arnold and Riston DrainPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Bransholme Great Culvert Pumping Station On the Holderness Drain · 4.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (11 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
65%
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 65 | 65% |
| 25 Sep 2024, 11:43 | 33.1 | 33.1% |
| 27 Aug 2024, 12:05 | 40 | 40% |
| 27 Jun 2024, 11:52 | 57.3 | 57.3% |
| 9 May 2024, 11:29 | 103.3 | 103.3% |
| 24 Apr 2024, 12:04 | 108.5 | 108.5% |
| 29 Feb 2024, 11:51 | 89.6 | 89.6% |
| 17 Jan 2024, 11:04 | 85.6 | 85.6% |
| 14 Dec 2023, 10:18 | 82.8 | 82.8% |
| 29 Nov 2023, 12:43 | 75.8 | 75.8% |
| 11 Oct 2023, 11:11 | 34.3 | 34.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.28 mg/l
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 7.28 | 7.28 mg/l |
| 25 Sep 2024, 11:43 | 3.5 | 3.5 mg/l |
| 27 Aug 2024, 12:05 | 4 | 4 mg/l |
| 27 Jun 2024, 11:52 | 5.18 | 5.18 mg/l |
| 9 May 2024, 11:29 | 10.1 | 10.1 mg/l |
| 24 Apr 2024, 12:04 | 12.5 | 12.5 mg/l |
| 29 Feb 2024, 11:51 | 10.3 | 10.3 mg/l |
| 17 Jan 2024, 11:04 | 11.7 | 11.7 mg/l |
| 14 Dec 2023, 10:18 | 10.3 | 10.3 mg/l |
| 29 Nov 2023, 12:43 | 9.69 | 9.69 mg/l |
| 11 Oct 2023, 11:11 | 3.41 | 3.41 mg/l |
Water temperature
code 0076 · °C
10.2 °C
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 10.2 | 10.2 °C |
| 25 Sep 2024, 11:43 | 12.7 | 12.7 °C |
| 27 Aug 2024, 12:05 | 15.2 | 15.2 °C |
| 27 Jun 2024, 11:52 | 20.1 | 20.1 °C |
| 9 May 2024, 11:29 | 16.3 | 16.3 °C |
| 24 Apr 2024, 12:04 | 9.1 | 9.1 °C |
| 29 Feb 2024, 11:51 | 9.1 | 9.1 °C |
| 17 Jan 2024, 11:04 | 2.2 | 2.2 °C |
| 14 Dec 2023, 10:18 | 5.9 | 5.9 °C |
| 29 Nov 2023, 12:43 | 4.9 | 4.9 °C |
| 11 Oct 2023, 11:11 | 15.5 | 15.5 °C |
pH
code 0061
7.8
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 7.8 | 7.8 |
| 25 Sep 2024, 11:43 | 7.5 | 7.5 |
| 27 Aug 2024, 12:05 | 7.5 | 7.5 |
| 27 Jun 2024, 11:52 | 7.7 | 7.7 |
| 9 May 2024, 11:29 | 8 | 8 |
| 24 Apr 2024, 12:04 | 8.1 | 8.1 |
| 29 Feb 2024, 11:51 | 7.9 | 7.9 |
| 17 Jan 2024, 11:04 | 7.8 | 7.8 |
| 14 Dec 2023, 10:18 | 7.61 | 7.61 |
| 29 Nov 2023, 12:43 | 7.7 | 7.7 |
| 11 Oct 2023, 11:11 | 7.31 | 7.31 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.057 mg/l
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 0.057 | 0.057 mg/l |
| 25 Sep 2024, 11:43 | 0.36 | 0.36 mg/l |
| 27 Aug 2024, 12:05 | 0.042 | 0.042 mg/l |
| 27 Jun 2024, 11:52 | 0.05 | 0.05 mg/l |
| 9 May 2024, 11:29 | 0.096 | 0.096 mg/l |
| 24 Apr 2024, 12:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Feb 2024, 11:51 | 0.11 | 0.11 mg/l |
| 17 Jan 2024, 11:04 | 0.2 | 0.2 mg/l |
| 14 Dec 2023, 10:18 | 0.13 | 0.13 mg/l |
| 29 Nov 2023, 12:43 | 0.092 | 0.092 mg/l |
| 11 Oct 2023, 11:11 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.48 mg/l
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 8.48 | 8.48 mg/l |
| 25 Sep 2024, 11:43 | 1.5 | 1.5 mg/l |
| 27 Aug 2024, 12:05 | 2.67 | 2.67 mg/l |
| 27 Jun 2024, 11:52 | 3.34 | 3.34 mg/l |
| 9 May 2024, 11:29 | 6.07 | 6.07 mg/l |
| 24 Apr 2024, 12:04 | 7.56 | 7.56 mg/l |
| 29 Feb 2024, 11:51 | 9.96 | 9.96 mg/l |
| 17 Jan 2024, 11:04 | 10.9 | 10.9 mg/l |
| 14 Dec 2023, 10:18 | 11 | 11 mg/l |
| 29 Nov 2023, 12:43 | 10.9 | 10.9 mg/l |
| 11 Oct 2023, 11:11 | 6.47 | 6.47 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.18 mg/l
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 0.18 | 0.18 mg/l |
| 25 Sep 2024, 11:43 | 0.8 | 0.8 mg/l |
| 27 Aug 2024, 12:05 | 0.52 | 0.52 mg/l |
| 27 Jun 2024, 11:52 | 0.33 | 0.33 mg/l |
| 9 May 2024, 11:29 | 0.12 | 0.12 mg/l |
| 24 Apr 2024, 12:04 | 0.11 | 0.11 mg/l |
| 29 Feb 2024, 11:51 | 0.073 | 0.073 mg/l |
| 17 Jan 2024, 11:04 | 0.14 | 0.14 mg/l |
| 14 Dec 2023, 10:18 | 0.085 | 0.085 mg/l |
| 29 Nov 2023, 12:43 | 0.11 | 0.11 mg/l |
| 11 Oct 2023, 11:11 | 0.25 | 0.25 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
877 µS/cm
Sampled 22 Oct 2024, 23 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Oct 2024, 10:40 | 877 | 877 µS/cm |
| 25 Sep 2024, 11:43 | 1240 | 1240 µS/cm |
| 27 Aug 2024, 12:05 | 980 | 980 µS/cm |
| 27 Jun 2024, 11:52 | 982 | 982 µS/cm |
| 9 May 2024, 11:29 | 1144 | 1144 µS/cm |
| 24 Apr 2024, 12:04 | 873 | 873 µS/cm |
| 29 Feb 2024, 11:51 | 828 | 828 µS/cm |
| 17 Jan 2024, 11:04 | 946 | 946 µS/cm |
| 14 Dec 2023, 10:18 | 769 | 769 µS/cm |
| 29 Nov 2023, 12:43 | 913 | 913 µS/cm |
| 11 Oct 2023, 11:11 | 1041 | 1041 µS/cm |
Everything measured here
118 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 118 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 11 | Oct 2023 – Oct 2024 | 65% 22 Oct 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 11 | Oct 2023 – Oct 2024 | 7.28 mg/l 22 Oct 2024 |
| Temperature of Water 0076 | River water | 11 | Oct 2023 – Oct 2024 | 10.2 °C 22 Oct 2024 |
| pH 0061 | River water | 11 | Oct 2023 – Oct 2024 | 7.8 22 Oct 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 11 | Oct 2023 – Oct 2024 | 0.057 mg/l 22 Oct 2024 |
| Nitrate as N 0117 | River water | 11 | Oct 2023 – Oct 2024 | 8.48 mg/l 22 Oct 2024 |
| Orthophosphate, reactive as P 0180 | River water | 11 | Oct 2023 – Oct 2024 | 0.18 mg/l 22 Oct 2024 |
| Conductivity at 25 C 0077 | River water | 11 | Oct 2023 – Oct 2024 | 877 µS/cm 22 Oct 2024 |
| 2,3,6-TBA :- {2,3,6-Trichlorobenzoic acid} 7726 | River water | 11 | Oct 2023 – Oct 2024 | below 0.03 µg/l 22 Oct 2024 |
| 2,4,5-T :- {2,4,5-Trichlorophenoxyacetic acid} 3546 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| 2,4-D :- {2,4-Dichlorophenoxyacetic acid} 3545 | River water | 11 | Oct 2023 – Oct 2024 | 0.096 µg/l 22 Oct 2024 |
| 2,4-DB :- {4-(2,4-dichlorophenoxy)butyric acid} 3791 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| 2-Phenoxypropionic acid :- {PPA} 6673 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| 4-Chloro-2-methylphenol :- {p-Chloro-o-cresol} 3341 | River water | 11 | Oct 2023 – Oct 2024 | below 0.05 µg/l 22 Oct 2024 |
| 4-Chlorophenoxyacetic acid 3547 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| 4-Nonylphenol Branched 9190 | River water | 6 | Feb 2024 – Oct 2024 | below 0.04 µg/l 22 Oct 2024 |
| 4-Phenoxybutyric acid :- {PBA} 6672 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| 4-tert-Octylphenol :- {p-tert-Octylphenol} 9267 | River water | 6 | Feb 2024 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Aldicarb 9344 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Aldicarb sulfoxide 8806 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Aldoxycarb :- {Aldicarb Sulfone} 8807 | River water | 10 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 11 | Oct 2023 – Oct 2024 | 280 mg/l 22 Oct 2024 |
| Aluminium, Dissolved 6037 | River water | 11 | Oct 2023 – Oct 2024 | below 20 µg/l 22 Oct 2024 |
| Aminomethylphosphonic acid 7125 | River water | 6 | Apr 2024 – Oct 2024 | 0.44 µg/l 22 Oct 2024 |
| Ammonia un-ionised as N 0119 | River water | 11 | Oct 2023 – Oct 2024 | 0.00067 mg/l 22 Oct 2024 |
| Asulam 3004 | River water | 11 | Oct 2023 – Oct 2024 | below 0.02 µg/l 22 Oct 2024 |
| Azoxystrobin 5050 | River water | 11 | Oct 2023 – Oct 2024 | below 0.02 µg/l 22 Oct 2024 |
| Barium, Dissolved 9446 | River water | 11 | Oct 2023 – Oct 2024 | 88 µg/l 22 Oct 2024 |
| Benazolin 3792 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Bentazone 4065 | River water | 11 | Oct 2023 – Oct 2024 | 0.14 µg/l 22 Oct 2024 |
| Benzo(a)Pyrene 6399 | River water | 11 | Oct 2023 – Oct 2024 | 0.0004 µg/l 22 Oct 2024 |
| Benzo(b)Fluoranthene 0731 | River water | 10 | Oct 2023 – Oct 2024 | 0.00048 µg/l 22 Oct 2024 |
| Benzo(g,h,i)Perylene 0714 | River water | 10 | Oct 2023 – Oct 2024 | 0.00068 µg/l 22 Oct 2024 |
| Benzo(k)Fluoranthene 0733 | River water | 10 | Oct 2023 – Oct 2024 | 0.00023 µg/l 22 Oct 2024 |
| Boron, Dissolved 9447 | River water | 11 | Oct 2023 – Oct 2024 | below 100 µg/l 22 Oct 2024 |
| Bromoxynil 6449 | River water | 9 | Nov 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Cadmium, Dissolved 0106 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Calcium, Dissolved 0239 | River water | 11 | Oct 2023 – Oct 2024 | 130 mg/l 22 Oct 2024 |
| Carbaryl 9343 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Carbendazim 3475 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Carbetamide 9073 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Carbofuran 3086 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 11 | Oct 2023 – Oct 2024 | 7.5 mg/l 22 Oct 2024 |
| Chloridazon 6760 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Chloride 0172 | River water | 11 | Oct 2023 – Oct 2024 | 49 mg/l 22 Oct 2024 |
| Chlorotoluron 9348 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Chloroxuron 3399 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Chromium, Dissolved 3409 | River water | 11 | Oct 2023 – Oct 2024 | below 0.5 µg/l 22 Oct 2024 |
| cis-Permethrin 9341 | River water | 9 | Oct 2023 – Oct 2024 | below 0.0001 µg/l 22 Oct 2024 |
| Clopyralid 6620 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Copper : BLM Bioavailable 4821 | River water | 11 | Oct 2023 – Oct 2024 | 0.09 µg/l 22 Oct 2024 |
| Copper, Dissolved 6450 | River water | 11 | Oct 2023 – Oct 2024 | 2.8 µg/l 22 Oct 2024 |
| Cypermethrin 0073 | River water | 10 | Oct 2023 – Oct 2024 | 0.00003 µg/l 22 Oct 2024 |
| Cypermethrin Identification 5446 | River water | 10 | Oct 2023 – Oct 2024 | 1 text result 22 Oct 2024 |
| Di(2-ethylhexyl) phthalate :- {DEHP} 6724 | River water | 6 | Apr 2024 – Oct 2024 | below 0.2 µg/l 22 Oct 2024 |
| Dicamba 3550 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Dichlorprop :- {2,4-DP} 3551 | River water | 10 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Diflurobenzuron 9345 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Diuron 3811 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Ethiofencarb 6955 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Ethirimol 5047 | River water | 11 | Oct 2023 – Oct 2024 | below 0.05 µg/l 22 Oct 2024 |
| Fenoprop 3552 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Fenuron 9339 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Flow Type 2896 | River water | 3 | Aug 2024 – Oct 2024 | Moderate Flow 22 Oct 2024 |
| Fluoranthene 0736 | River water | 11 | Oct 2023 – Oct 2024 | 0.0018 µg/l 22 Oct 2024 |
| Fluroxypyr 4064 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 11 | Oct 2023 – Oct 2024 | 1 text result 22 Oct 2024 |
| Glyphosate 3007 | River water | 6 | Apr 2024 – Oct 2024 | 0.23 µg/l 22 Oct 2024 |
| Hardness, Calcium 0163 | River water | 11 | Oct 2023 – Oct 2024 | 325 mg/l 22 Oct 2024 |
| Hardness, Total as CaCO3 0158 | River water | 11 | Oct 2023 – Oct 2024 | 390 mg/l 22 Oct 2024 |
| Imazapyr 7025 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Indeno(1,2,3-cd)pyrene 0746 | River water | 10 | Oct 2023 – Oct 2024 | 0.0006 µg/l 22 Oct 2024 |
| Ioxynil 9068 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Iron, Dissolved 6460 | River water | 11 | Oct 2023 – Oct 2024 | 42 µg/l 22 Oct 2024 |
| Isoproturon 3117 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Lead : BLM Bioavailable 3377 | River water | 11 | Oct 2023 – Oct 2024 | 0.01 µg/l 22 Oct 2024 |
| Lead, Dissolved 0052 | River water | 11 | Oct 2023 – Oct 2024 | below 0.1 µg/l 22 Oct 2024 |
| Linuron 3118 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Lithium, Dissolved 4201 | River water | 11 | Oct 2023 – Oct 2024 | below 100 µg/l 22 Oct 2024 |
| Magnesium, Dissolved 0235 | River water | 11 | Oct 2023 – Oct 2024 | 16 mg/l 22 Oct 2024 |
| Manganese : BLM Bioavailable 4820 | River water | 11 | Oct 2023 – Oct 2024 | 7.2 µg/l 22 Oct 2024 |
| Manganese, Dissolved 6458 | River water | 11 | Oct 2023 – Oct 2024 | 19 µg/l 22 Oct 2024 |
| MCPA :- {4-Chloro-2-methylphenoxyacetic acid} 3548 | River water | 11 | Oct 2023 – Oct 2024 | 0.1 µg/l 22 Oct 2024 |
| MCPB :- {4-Chloro-2-methylphenoxybutyric acid} 3790 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Mecoprop 3549 | River water | 10 | Oct 2023 – Oct 2024 | 0.031 µg/l 22 Oct 2024 |
| Methabenzthiazuron 7053 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Methiocarb 6971 | River water | 11 | Oct 2023 – Oct 2024 | below 0.001 µg/l 22 Oct 2024 |
| Methomyl 6972 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Metoxuron 3130 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Metsulfuron-methyl 9861 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Monolinuron 3925 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Monuron 3400 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Neburon 9756 | River water | 11 | Oct 2023 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 11 | Oct 2023 – Oct 2024 | 0.47 µg/l 22 Oct 2024 |
| Nickel, Dissolved 3410 | River water | 11 | Oct 2023 – Oct 2024 | 1.9 µg/l 22 Oct 2024 |
| Nitrite as N 0118 | River water | 11 | Oct 2023 – Oct 2024 | 0.12 mg/l 22 Oct 2024 |
| Nitrogen, Total as N 9686 | River water | 11 | Oct 2023 – Oct 2024 | 9.8 mg/l 22 Oct 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 11 | Oct 2023 – Oct 2024 | 8.6 mg/l 22 Oct 2024 |
| Oxamyl 6980 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Perfluorooctanoate anion 9274 | River water | 9 | Dec 2023 – Oct 2024 | 0.0017 µg/l 22 Oct 2024 |
| Perfluorooctylsulphonate anion 9276 | River water | 9 | Dec 2023 – Oct 2024 | 0.001 µg/l 22 Oct 2024 |
| Phenoxyacetic acid :- {PAA} 6671 | River water | 11 | Oct 2023 – Oct 2024 | 0.042 µg/l 22 Oct 2024 |
| Phosphorus, Total as P 0348 | River water | 11 | Oct 2023 – Oct 2024 | 0.22 mg/l 22 Oct 2024 |
| Picloram 9883 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Potassium, Dissolved 0209 | River water | 11 | Oct 2023 – Oct 2024 | 6.2 mg/l 22 Oct 2024 |
| Propoxur 6987 | River water | 10 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Silica, reactive as SiO2 0182 | River water | 11 | Oct 2023 – Oct 2024 | 10 mg/l 22 Oct 2024 |
| Sodium, Dissolved 0205 | River water | 11 | Oct 2023 – Oct 2024 | 33 mg/l 22 Oct 2024 |
| Strontium, Filtered 6693 | River water | 11 | Oct 2023 – Oct 2024 | 350 µg/l 22 Oct 2024 |
| Sulcotrione 5042 | River water | 11 | Oct 2023 – Oct 2024 | below 0.1 µg/l 22 Oct 2024 |
| Sulphate, Dissolved as SO4 7859 | River water | 11 | Oct 2023 – Oct 2024 | 96 mg/l 22 Oct 2024 |
| trans-Permethrin 9342 | River water | 8 | Oct 2023 – Oct 2024 | 0.00014 µg/l 22 Oct 2024 |
| Tributyl Tin as Cation 8944 | River water | 10 | Oct 2023 – Oct 2024 | below 0.0002 µg/l 22 Oct 2024 |
| Triclopyr 3555 | River water | 11 | Oct 2023 – Oct 2024 | below 0.005 µg/l 22 Oct 2024 |
| Triclosan 5889 | River water | 5 | May 2024 – Oct 2024 | below 0.01 µg/l 22 Oct 2024 |
| Triphenyl Tin as Cation 5732 | River water | 10 | Oct 2023 – Oct 2024 | below 0.0002 µg/l 22 Oct 2024 |
| Zinc : BLM Bioavailable 4822 | River water | 11 | Oct 2023 – Oct 2024 | 0.48 µg/l 22 Oct 2024 |
| Zinc, Dissolved 3408 | River water | 11 | Oct 2023 – Oct 2024 | 1.6 µg/l 22 Oct 2024 |
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.