sampling point
River Tamar At Crowford Bridge

Description	RIVER TAMAR AT CROWFORD BRIDGE
Sampling point ID	SW-91210168
Type	Freshwater – Rivers
Status	open
Location	easting northing: 228720 99425 lat lon: 50.769057, -4.430339
Area	Devon And Cornwall
Sub-Area	Central Devon And Cornwall
Summary	131 samples taken between 2024 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.

33 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
BOD ATU
BOD5DyATUFil
Calcium - Ca
Chlorophyl-A
Cond @ 20C
Cond @ 25C
Cu Filtered
Hardness
Hdnss Ca
Hdnss Mg
Magnesium-Mg
N Digested
N Inorganic
N Oxidised
N-Kjeldahl
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Phosphorus-P
Potassium- K
SiO2 Rv
Sld Sus@105C
Temp Water
Type of Flow
WethPresPrec
Zinc - as Zn
pH

Displaying the twenty most recent samples. You can see all 131 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 13 Jul 2023 to 5 Jun 2024

Notation	Determinand	Units	13 Jul 2023 11:48	20 Sep 2023 11:16	19 Oct 2023 10:24	25 Oct 2023 12:59	13 Nov 2023 14:47	11 Dec 2023 10:49	3 Jan 2024 12:11	7 Feb 2024 12:38	4 Mar 2024 11:48	5 Jun 2024 12:54
0061	pH		7.58	7.32	7.13	7.23	7.23	7.18	7.19	7.32	7.26	7.92
0076	Temperature of Water	°C	17	15.7	13.3	11.6	11.9	9.5	9.4	9.9	7	15.5
0077	Conductivity at 25 C	μs/cm	225	236	203	208	168	182	176	132	174	219
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.17	< 0.03	0.22	0.12	0.039	0.07	0.084	0.075	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.77	1.8	2.6	1.8	1.4	2.5	1.9	1.2	2.3	1.2
0117	Nitrate as N	mg/l	0.765	1.78	2.59	1.79	1.39	2.48	1.88	1.19	2.28	1.19
0118	Nitrite as N	mg/l	0.0046	0.02	0.0064	0.015	0.015	0.016	0.016	0.013	0.017	0.0054
0119	Ammonia un-ionised as N	mg/l	< 0.00035	0.001	< 0.0001	0.00078	0.00043	0.00011	0.00019	0.00032	0.0002	< 0.00068
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	55	51	35	51	40	36	35		39	57
0180	Orthophosphate, reactive as P	mg/l	0.045	0.13	0.022	0.061	0.055	0.043	0.049	0.063	0.046	0.044
9901	Oxygen, Dissolved, % Saturation	%	96.3	84.7	92.4	90.1	91	92.7	91.9	93.3	93.2	108.1
9924	Oxygen, Dissolved as O2	mg/l	9.28	8.39	9.65	9.78	9.81	10.6	10.5	10.5	11.3	10.8

Samples from 23 Jun 2016 to 9 Jun 2023

Notation	Determinand	Units	23 Jun 2016 11:13	27 Oct 2016 12:35	31 Oct 2016 11:39	23 Nov 2016 10:51	16 Feb 2017 11:42	20 Mar 2017 13:45	30 Mar 2017 14:35	27 Apr 2023 12:03	17 May 2023 12:56	9 Jun 2023 13:56
0061	pH		7	7.78	7.86	7.5	7.48	7.31	7.58	7.41	7.54	7.9
0076	Temperature of Water	°C	15.4	10.9	11.1	7.9	7.7	10.1	12.2	10.6	13.5	19.1
0077	Conductivity at 25 C	μs/cm	187	226	228	188	216	181	207	207	205	240
0111	Ammoniacal Nitrogen as N	mg/l	0.031	< 0.03	< 0.03	0.09	0.041	0.766	0.036	< 0.03	< 0.03	0.036
0116	Nitrogen, Total Oxidised as N	mg/l	2.08	1.39	1.09	2.39	2.36	0.93	2.36	1.9	2.4	1.1
0117	Nitrate as N	mg/l	2.07	1.38	1.09	2.38	2.35	0.911	2.35	1.89	2.4	1.1
0118	Nitrite as N	mg/l	0.0071	0.0058	0.0047	0.0112	0.0147	0.0186	0.0142	0.0051	0.0043	0.0047
0119	Ammonia un-ionised as N	mg/l	9.0e-05	< 0.00035	< 0.00043	0.00045	0.00019	0.00292	0.0003	< 0.00015	< 0.00025	0.00102
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	39	56	58	37	42	49	44	45	41	57
0180	Orthophosphate, reactive as P	mg/l	0.046	0.032	0.024	0.068	0.039	0.105	0.044	0.023	0.027	0.034
9901	Oxygen, Dissolved, % Saturation	%	93.6	97.3	85.3	86.3	96.2	97.5	96.2	93.8	102.7	107.2
9924	Oxygen, Dissolved as O2	mg/l	9.33	10.7	9.36	10.2	11.5	11	10.3	10.4	10.7	9.9

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sampling point River Tamar At Crowford Bridge

Determinands

Sampling results

Samples from 13 Jul 2023 to 5 Jun 2024

Samples from 23 Jun 2016 to 9 Jun 2023

sampling point
River Tamar At Crowford Bridge