sampling point
River Tone At Knapp Bridge

Description	R TONE KNAPP BRIDGE
Sampling point ID	SW-E1008100
Type	Freshwater – Rivers
Status	open
Location	easting northing: 330125 126061 lat lon: 51.029645, -2.997786
Area	Wessex
Sub-Area	West Wessex
Summary	292 samples taken between 2000 and 2024 Note: a maximum of 10,000 sample measurements are included in this view. Older measurements have been omitted. Please see the API to access the complete data set.

Determinands identify a property which can be measured on a sample or the sampling environment, together with the units in which the result of that measurement will be expressed.

164 determinands have been measured at this site

1,1,1-TCA
1,2,3-TCB
1,2,4-TCB
1,3,5-TCB
12-DCA
2,4-D
2-CHLORO-4-N
2-CHLORO-6-N
2Cl5NToluene
4Cl2Ntoluene
4Cl3NToluene
Aclonifen
Alachlor
Aldrin
Alky pH 4.5
Ammonia(N)
Arsenic - As
As-Filtered
Atrazine
Azinphos Myl
AzinphsEthyl
B - Filtered
B-[a]-pyrene
B-[b]-fluora
B-[ghi]-pery
B-[k]-fluora
BOD ATU
Benzene
Bifenox
Boron - as B
C - Org Filt
CHLOROPHYLL
CN Free
COD as O2
Ca Filtered
Cadmium - Cd
Carbon Tet
Cd - Dry Wt
Cd Filtered
Chloride Ion
Chloroform
Chlorothalnl
Chromium -Cr
ColfmF Conf
ColformsPre
Cond @ 25C
Copper - Cu
Cr Hexavalnt
Cr- Filtered
Cu Filtered
DDE (PP')
DDT (OP')
DDT (PP)
DDT Derived
DiClBenzPhWW
DiClMe
Diazinon
Dichlorvos
Dieldrin
Dimethoate
DrySolids30C
Dtrgt NncSyn
DtrgtAncSyn
EndosulphanB
Endrin
F Coli Pre
Fe- Filt
Fenitrothion
Fenthion
Fluoranthene
Fluoride - F
HCH Alpha
HCH Beta
HCH Delta
HCH Gamma
HEXACHLORO 1
Heptachlor
Hexachlorbnz
Hg Filtered
ICP-MS Semiq
Ind123pyrene
Irgarol 1051
Iron - as Fe
Isodrin
K- Filtered
Lead - as Pb
MR Screen
MST Filter
Malathion
Manganse-Mn
Mercury - Hg
Mg Filtered
Mn- Filtered
N Oxidised
NH3 un-ion
NO FLOW/SAMP
Na- Filtered
Ni- Filtered
Nickel - Ni
Nitrate-N
Nitrite-N
Nitrogen - N
Nonyl Phenol
O Diss %sat
Octyl Phenol
Oil & Grs Vs
Orthophospht
Oxygen Diss
PBDE
PCB Con 028
PCB Con 052
PCB Con 101
PCB Con 118
PCB Con 138
PCB Con 153
PCB Con 180
PCBs
PClBenzene
Parathion
ParathionMyl
Pb Filtered
Pendimethaln
Pentachlrphl
Phenol Odour
Phenols Mono
Phosphate
Phosphorus-P
Potassium- K
Quinoxyfen
SO4dis
Salinity
Sample Prep
Se- Filtered
Selenium -Se
SiO2 Rv
Simazine
Sld NV@500C
Sld Sus@105C
Sodium - Na
StrepF C-MF
StrepF PMF
Sulphate SO4
TCB Tot
TDE (PP)
Temp Water
Terbutryne
TetClEthene
Tot Coli CMF
Tot Drins(4)
Tot HCHs ABG
TriBT Cation
TriPT Cation
Trichloroeth
Trifluralin
TurbidityNTU
Type of Flow
V - Filtered
Vanadium - V
WethPresPrec
Zinc - as Zn
Zn- Filtered
c-Hept Epox
pH
t-Hept Epox

Displaying the twenty most recent samples. You can see the most recent ten thousand sample measurements (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 12 Jun 2023 to 21 Jun 2024

Notation	Determinand	Units	12 Jun 2023 14:11	12 Jul 2023 12:28	10 Aug 2023 11:35	11 Oct 2023 10:02	24 Oct 2023 13:46	29 Jan 2024 09:21	14 Mar 2024 14:01	16 Apr 2024 12:03	10 May 2024 09:22	21 Jun 2024 12:54
0050	Lead	μg/l	0.33	0.1	0.25	0.37	9.1	0.68	0.74	0.89	0.4	0.25
0052	Lead, Dissolved	μg/l	< 0.1	0.11	< 0.1	< 0.1	0.12	< 0.1	< 0.1
0061	pH		7.93	7.86	7.86	7.7	7.79	8.09	7.95			8.35
0076	Temperature of Water	°C	19.6	17.2	18.8	15	12.8	9.5	11.4			18
0077	Conductivity at 25 C	μs/cm	621	570	622	599	386	514	480			614
0085	BOD : 5 Day ATU	mg/l										1.5
0103	Mercury, Dissolved	μg/l	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
0105	Mercury	μg/l	< 0.01	< 0.01	< 0.01	< 0.01	0.025	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
0106	Cadmium, Dissolved	μg/l	0.01	0.014	< 0.01	0.011	0.012	< 0.01	< 0.01
0108	Cadmium	μg/l	0.012	0.013	0.014	0.011	0.13	0.02	0.016	0.019	0.012	0.013
0111	Ammoniacal Nitrogen as N	mg/l	0.099	0.11	0.057	0.033	0.12	0.082	0.073			0.036
0116	Nitrogen, Total Oxidised as N	mg/l	7.6	8	11	8.3	4.6	5.6	5.4			8.3
0117	Nitrate as N	mg/l	7.56	7.93	10.9	8.27	4.56	5.57	5.37			8.27
0118	Nitrite as N	mg/l	0.041	0.075	0.062	0.028	0.042	0.033	0.032			0.032
0119	Ammonia un-ionised as N	mg/l	0.0031	0.00248	0.00144	0.00044	0.00167	0.00144	0.00132			0.00118
0135	Solids, Suspended at 105 C	mg/l	5.2	4.8	4.1	6.8	180	15	17	12	6.5	3.1
0162	Alkalinity to pH 4.5 as CaCO3	mg/l										200
0172	Chloride	mg/l	26	26	29	26	18	22	19
0180	Orthophosphate, reactive as P	mg/l	0.23	0.37	0.19	0.18	0.16	0.099	0.099			0.16
0182	Silica, reactive as SiO2	mg/l	7.5	6.5	8.3	9.3	8.1	8.3	8.5
0205	Sodium, Dissolved	mg/l	16	16	20	18	11	13	12
0209	Potassium, Dissolved	mg/l	4.9	5.5	6.5	5.6	4.7	3.7	3.6
0235	Magnesium, Dissolved	mg/l		12		15		12
0239	Calcium, Dissolved	mg/l		79		80		72
0301	Carbon, Organic, Dissolved as C :- {DOC}	mg/l		3.5		2.9		2.5
0348	Phosphorus, Total as P	mg/l	0.27	0.41	0.22	0.2	0.48	0.15	0.14			0.17
0499	HCH -gamma :- {Lindane}	μg/l	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003
0753	PCB : Total	μg/l	< 0.008	< 0.008	< 0.008	< 0.008	< 0.008	< 0.008	< 0.008	< 0.008	< 0.008
3408	Zinc, Dissolved	μg/l	2.3	4.9	8.1	4	2.4	1.6	1.8
3409	Chromium, Dissolved	μg/l	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5
3410	Nickel, Dissolved	μg/l	0.64	0.8	1.2	0.77	0.92	0.64	0.71
6045	Arsenic, Dissolved	μg/l	4.6	4.6	4.1	4	3.7	2.9	2.7
6396	Turbidity	ntu	2	3.9	2.2	2.9	180	9.5	12
6450	Copper, Dissolved	μg/l	1.5	1.9	2.1	1.3	2.3	1.3	1.4
6452	Copper	μg/l	1.8	1.8	2.4	1.6	10	2.5	2.1	3.7	1.6	1.7
6455	Zinc	μg/l	4	12	10	4.8	35	4.5	5.5	7.3	3.3	3.5
6458	Manganese, Dissolved	μg/l	22	24	31	34	< 10	27	20
6460	Iron, Dissolved	μg/l	< 30	42	45	42	54	< 30	< 30
6462	Nickel	μg/l							1.3	1.3	0.95	1.1
7859	Sulphate, Dissolved as SO4	mg/l	57	49	72	66	27	35	31
7887	Chlorophyll : Acetone Extract	μg/l	3.4	2.8	1.8		12	1.4	1.9
9447	Boron, Dissolved	μg/l	< 100	< 100	< 100	< 100	< 100	< 100	< 100
9686	Nitrogen, Total as N	mg/l	8	8.7	12	8.6	6.2	6.4	5.5			8.6
9768	PCB - 028	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9769	PCB - 052	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9770	PCB - 101	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9771	PCB - 118	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9772	PCB - 138	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9773	PCB - 153	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9774	PCB - 180	μg/l	< 0.002	< 0.002	< 0.002	< 0.002	< 0.002	< 0.002	< 0.002	< 0.002	< 0.002	< 0.002
9901	Oxygen, Dissolved, % Saturation	%	96.3	92.2	94.7	86.9	92.6	98.7	97.1			119
9924	Oxygen, Dissolved as O2	mg/l	8.8	8.85	8.8	8.74	9.78	11.3	10.6			11.2

Samples from 28 Oct 2021 to 16 May 2023

Notation	Determinand	Units	28 Oct 2021 10:28	9 Nov 2021 13:48	6 Dec 2021 13:05	9 Dec 2021 11:10	6 Jan 2022 15:01	21 Feb 2022 15:09	24 Mar 2022 09:44	21 Apr 2022 10:46	26 May 2022 11:10	16 May 2023 10:16
0050	Lead	μg/l	0.33	0.44	0.33	1.4	0.76	3.7	0.3	0.17	0.21	0.38
0052	Lead, Dissolved	μg/l	< 0.1	< 0.1	< 0.1	< 0.1	< 0.1	< 0.1	< 0.1	< 0.1	< 0.1	< 0.1
0061	pH		8.01	8.03	7.96	7.93	8.02	7.97	8.2	8.5	7.87	7.98
0076	Temperature of Water	°C	13.3	11.6	7.6	6.8	7.1	8.4	9.2	13.3	14.9	13.1
0077	Conductivity at 25 C	μs/cm	536	550	592	506	477	440	561	610	638	505
0103	Mercury, Dissolved	μg/l	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
0105	Mercury	μg/l	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
0106	Cadmium, Dissolved	μg/l	< 0.01	< 0.01	0.01	0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
0108	Cadmium	μg/l	0.011	0.013	0.012	0.03	0.017	0.06	0.011	0.012	0.013	0.012
0111	Ammoniacal Nitrogen as N	mg/l	0.046	0.039	0.053	0.09	0.047	0.13	0.031	< 0.03	0.4	0.055
0116	Nitrogen, Total Oxidised as N	mg/l	6.4	7.6	7.8	6.1	6	4.3	6.8	6.9	8.8	5.7
0117	Nitrate as N	mg/l	6.37	7.57	7.74	6.06	5.97	4.26	6.78	6.87	8.71	5.67
0118	Nitrite as N	mg/l	0.033	0.029	0.057	0.042	0.026	0.036	0.023	0.031	0.087	0.029
0119	Ammonia un-ionised as N	mg/l	0.00107	0.0008	0.00074	0.00111	0.00069	0.00197	0.00053	< 0.0007	0.00779	0.0012
0135	Solids, Suspended at 105 C	mg/l	6.8	6.4	5.3	25	14	84	7	4.3	4.8	9.4
0162	Alkalinity to pH 4.5 as CaCO3	mg/l				160
0172	Chloride	mg/l	22	22	28	26	21	35	23	26	28	21
0180	Orthophosphate, reactive as P	mg/l	0.12	0.11	0.13	0.15	0.094	0.15	0.088	0.12	0.28	0.15
0182	Silica, reactive as SiO2	mg/l	10	9.8	9.9	9.5	8.8	7.1	7.9	3.1	8.6	8
0205	Sodium, Dissolved	mg/l	14	14	17	15	13	18	14	16	19	13
0209	Potassium, Dissolved	mg/l	4.5	4.5	5.3	5.1	3.7	4.8	3.8	4.6	6.1	3.7
0301	Carbon, Organic, Dissolved as C :- {DOC}	mg/l	2.9	2.9	3.4	5.5	2.9	6.9	2.3	2.6	3.5
0348	Phosphorus, Total as P	mg/l	0.14	0.13	0.17	0.22	0.12	0.32	0.11	0.14	0.32	0.17
0499	HCH -gamma :- {Lindane}	μg/l	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003	< 0.003
0753	PCB : Total	μg/l		< 0.008			< 0.008		< 0.008			< 0.008
3408	Zinc, Dissolved	μg/l	2.3	2.4	3.5	3.3	2.7	2.7	2	2.1	4.8	1.7
3409	Chromium, Dissolved	μg/l	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5	< 0.5
3410	Nickel, Dissolved	μg/l	< 0.5	< 0.5	0.8	1	0.64	0.93	0.62	0.61	0.92	0.62
4994	GCMS Screen : Target Based multi-residue screening : Semi Quantitative	text				1
6045	Arsenic, Dissolved	μg/l	3.5	3.4	3.4	3.2	2.8	2.5	3.1	4	4.5	3.5
6396	Turbidity	ntu	5.4	3.7	5.5	20	6.7	22	4.3	2.8	2.8	5.8
6450	Copper, Dissolved	μg/l	1.3	1.3	1.4	2.1	1.2	2	1	1.3	1.7	1.4
6452	Copper	μg/l	1.7	1.6	1.8	3.5	1.9	5	1.4	1.6	1.9	1.7
6455	Zinc	μg/l	3.7	4.3	4.8	12	5.5	17	3.5	2.8	6.1	3.1
6458	Manganese, Dissolved	μg/l	36	32	24	18	22	< 10	26	25	26	27
6460	Iron, Dissolved	μg/l	43	< 30	43	45	< 30	46	39	48	40	< 30
7859	Sulphate, Dissolved as SO4	mg/l	50	49	55	42	37	27	46	59	66	36
7887	Chlorophyll : Acetone Extract	μg/l	1.3	0.93				7.4	3.1	8.4	3.8	2.1
9447	Boron, Dissolved	μg/l	< 100	< 100	< 100	< 100	< 100	< 100	< 100	< 100	< 100	< 100
9686	Nitrogen, Total as N	mg/l	6.9	8.4	8	6.7	6.4	6.1	7.2	7.4	9.9	6.3
9768	PCB - 028	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9769	PCB - 052	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9770	PCB - 101	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001		< 0.001
9771	PCB - 118	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9772	PCB - 138	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9773	PCB - 153	μg/l	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
9774	PCB - 180	μg/l		< 0.002			< 0.002		< 0.002		< 0.002	< 0.002
9901	Oxygen, Dissolved, % Saturation	%	90.3	88.5	96.4	92.4	93.8	99.1	93	112	88	97.2
9924	Oxygen, Dissolved as O2	mg/l	9.43	9.6	11.5	11.3	11.3	11.6	10.7	11.7	8.87	10.2

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sampling point River Tone At Knapp Bridge

Determinands

Sampling results

Samples from 12 Jun 2023 to 21 Jun 2024

Samples from 28 Oct 2021 to 16 May 2023

sampling point
River Tone At Knapp Bridge