sampling point
Knowl Water At Old Railway Br Velator

Description	KNOWL WATER AT OLD RAILWAY BRIDGE VELATOR
Sampling point ID	SW-73011002
Type	Freshwater – Rivers
Status	open
Location	easting northing: 249030 135600 lat lon: 51.099769, -4.157544
Area	Devon And Cornwall
Sub-Area	East Devon And Cornwall
Summary	191 samples taken between 2023 and 2000

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.

41 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
BOD ATU
CHLOR A
CHLOROPHYLL
COD as O2
Calcium - Ca
Chloride Ion
Chlorophyl-A
Cond @ 20C
Cond @ 25C
Cu Filtered
Dtrgt NncSyn
DtrgtAncSyn
GCMS S-Vol
Hardness
Hdnss Ca
Hdnss Mg
Magnesium-Mg
Mineral Oils
N Inorganic
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Oil & Grs Vs
Orthophospht
Oxygen Diss
Phenol Odour
PhenolicOdor
Potassium- K
SiO2 Rv
Sld Sus@105C
Temp Water
TriBT Cation
Type of Flow
WethPresPrec
Zinc - as Zn
pH

Displaying the twenty most recent samples. You can see all 191 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 8 Oct 2021 to 25 Jan 2023

Notation	Determinand	Units	8 Oct 2021 08:50	25 Nov 2021 11:08	9 Dec 2021 10:34	14 Jan 2022 09:22	22 Feb 2022 10:03	25 Mar 2022 09:31	4 Apr 2022 10:44	25 Jul 2022 08:49	12 Oct 2022 11:16	25 Jan 2023 12:56
0061	pH		7.56	7.9	7.81	7.82	7.99	8.12	7.83	8.1	8.1	7.77
0076	Temperature of Water	°C	13.5	8.5	8.8	8.1	10.1	8.2	8.6	16.3	11.3	7.2
0077	Conductivity at 25 C	μs/cm	270	271	262	267	273	279	287	368	324	289
0111	Ammoniacal Nitrogen as N	mg/l	0.11	< 0.03	< 0.03	0.033	< 0.03	< 0.03	< 0.03	< 0.03		0.039
0116	Nitrogen, Total Oxidised as N	mg/l	5.3	5.5	5.6	6.2	5.9	5.3	5	3.6	3.6	6.8
0117	Nitrate as N	mg/l	5.26	5.49	5.59	6.19	5.89	5.3	4.99	3.6	3.6	6.79
0118	Nitrite as N	mg/l	0.036	0.0095	0.0095	0.015	0.0093	0.0043	0.008	0.0049	< 0.004	0.0068
0119	Ammonia un-ionised as N	mg/l	0.00096	< 0.00039	< 0.00033	0.00035	< 0.00054	< 0.00048	< 0.00034	< 0.00087		0.00034
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	62	66	63	57	59	70	67	84	92	59
0180	Orthophosphate, reactive as P	mg/l	0.054	0.058	0.041	0.033	0.04	0.051	0.056	0.13	0.1	0.034
9901	Oxygen, Dissolved, % Saturation	%	98.1	96	98.3	99.6	88	103.4	101.3	94.1	99	100.5
9924	Oxygen, Dissolved as O2	mg/l	10.2	11.2	11.4	11.7	9.89	12.2	11.8	9.2	10.8	12.1

Samples from 20 Jun 2018 to 16 Sep 2021

Notation	Determinand	Units	20 Jun 2018 10:05	26 Sep 2018 11:00	5 Dec 2018 13:40	12 Jan 2021 09:01	12 Apr 2021 11:08	10 May 2021 11:37	14 Jun 2021 08:58	20 Jul 2021 11:15	13 Sep 2021 11:15	16 Sep 2021 09:51
0061	pH		7.9	8.08	7.6	7.9	8.5	8	7.84	8.04	8	8.34
0076	Temperature of Water	°C	15.6	10.5	11.4	9.4	7.5	11.8	14.8	17.8	15.3	14.8
0077	Conductivity at 25 C	μs/cm	309	288	265	321	292	295	290	310	292	304
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	0.063	0.031	< 0.03	0.042	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	4.55	5.05	5.77	5.7	5.1	4.4	5.1	4.5	3.7	3.9
0117	Nitrate as N	mg/l	4.54	5.04	5.74	5.69	5.09	4.39	5.09	4.49	3.7	3.9
0118	Nitrite as N	mg/l	0.0089	0.0092	0.0322	0.015	0.011	0.012	0.0089	0.0072	< 0.004	0.0044
0119	Ammonia un-ionised as N	mg/l	< 0.00066	< 0.00057	0.00051	0.00043	< 0.00046	0.00087	< 0.00054	< 0.00097	< 0.00081	< 0.00078
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	78	66	55	66	68	72	73	84	78	84
0180	Orthophosphate, reactive as P	mg/l	0.14	0.067	0.044	0.15	0.042	0.087	0.045	0.086	0.1	0.11
9901	Oxygen, Dissolved, % Saturation	%	97	99.6	96	97.6	104	98	97.4	89.6	97	92
9924	Oxygen, Dissolved as O2	mg/l	9.63	11.1	10.5	11.2	12.5	10.6	9.84	8.5	9.69	9.29

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sampling point Knowl Water At Old Railway Br Velator

Determinands

Sampling results

Samples from 8 Oct 2021 to 25 Jan 2023

Samples from 20 Jun 2018 to 16 Sep 2021

sampling point
Knowl Water At Old Railway Br Velator