sampling point
Small Brook At Headon Bridge

Description	SMALL BROOK (TAMAR) AT HEADON BRIDGE
Sampling point ID	SW-91212023
Type	Freshwater – Rivers
Status	open
Location	easting northing: 231000 107310 lat lon: 50.84057, -4.401667
Area	Devon And Cornwall
Sub-Area	Central Devon And Cornwall
Summary	115 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.

30 determinands have been measured at this site

Action taken
Alky pH 4.5
Ammonia(N)
BOD ATU
C - Organic
Calcium - Ca
Chloride Ion
Cond @ 25C
Cu Filtered
Hardness
Hdnss Ca
Hdnss Mg
Magnesium-Mg
N Inorganic
N Oxidised
NH3 un-ion
NO FLOW/SAMP
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Potassium- K
Sld Sus@105C
Temp Water
TurbidityNTU
Type of Flow
WethPresPrec
Zinc - as Zn
pH

Displaying the twenty most recent samples. You can see all 115 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 14 Jul 2022 to 3 Mar 2023

Notation	Determinand	Units	14 Jul 2022 10:28	5 Aug 2022 14:25	19 Aug 2022 09:33	27 Sep 2022 10:10	12 Oct 2022 09:44	3 Nov 2022 12:31	19 Dec 2022 11:12	23 Jan 2023 11:58	9 Feb 2023 10:40	3 Mar 2023 12:41
0061	pH		7.55	7.46		7.48	7.27	6.85	6.91	7.11	7.14	7.29
0076	Temperature of Water	°C	13.9	14.2		11.1	9.8	11.4	9.1	5.1	6.4	4.7
0077	Conductivity at 25 C	μs/cm	239	254		265	243	213	194	185	187	182
0111	Ammoniacal Nitrogen as N	mg/l	0.035	0.037		< 0.03	< 0.03	0.17	0.3	0.13	0.13	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.83	0.73		0.88	1.2	2.3	1.9	2.2	1.8	1.7
0117	Nitrate as N	mg/l	0.826	0.726		0.876	1.2	2.29	1.89	2.19	1.78	1.69
0118	Nitrite as N	mg/l	< 0.004	< 0.004		< 0.004	0.0043	0.011	0.015	0.012	0.02	0.0063
0119	Ammonia un-ionised as N	mg/l	0.00031	0.00027		< 0.00018	< 0.0001	0.00025	0.00042	0.00022	0.00025	< 7.0e-05
0135	Solids, Suspended at 105 C	mg/l	6.1	10	4.4	5.4	< 3	250	21	5	6.5	3.7
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	73	75		64	49	31	32	27	34	33
0180	Orthophosphate, reactive as P	mg/l	0.093	0.058		0.082	0.06	0.078	0.041	0.023	0.018	0.015
9901	Oxygen, Dissolved, % Saturation	%	93.7	86.1		86.9	88.7	85.8	95.6	95.2	96.9	102.4
9924	Oxygen, Dissolved as O2	mg/l	9.65	8.81		9.54	10	9.35	11	12.1	11.9	13.2

Samples from 9 Nov 2015 to 7 Jun 2022

Notation	Determinand	Units	9 Nov 2015 13:34	26 Jan 2016 12:10	11 Mar 2016 11:20	20 Jun 2016 13:51	20 Oct 2016 09:48	14 Dec 2016 08:47	13 Jan 2017 08:42	7 Apr 2022 12:08	16 May 2022 12:29	7 Jun 2022 12:41
0061	pH		7.3		7.19	7.07	7.53	7.09	7.46	7.1	7.4	7.6
0076	Temperature of Water	°C	11.5		5.6	14.9	9.3	8.8	4.4	8.7	13.7	14.1
0077	Conductivity at 25 C	μs/cm	158		173	98	172	151	139	234	216	231
0111	Ammoniacal Nitrogen as N	mg/l	0.0135		0.0504	0.0288	0.0093	0.0647	0.0494	0.6	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	1.06		1.04	0.54	0.787	0.851	1.06	1.3	1.3	1.5
0117	Nitrate as N	mg/l	1.06		1.04	0.537	0.781	0.844	1.06	1.27	1.3	1.5
0118	Nitrite as N	mg/l	0.0043		0.00421	0.00343	0.0057	0.00663	0.00412	0.03	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	6.0e-05		0.0001	9.0e-05	6.0e-05	0.00013	0.00017	0.00127	< 0.00018	< 0.0003
0135	Solids, Suspended at 105 C	mg/l										16
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	36		32	21	43	31	23	36	59	64
0180	Orthophosphate, reactive as P	mg/l	0.0293	0.026	0.0175	0.0776	0.0375	0.0267	0.031	0.056	0.039	0.057
9901	Oxygen, Dissolved, % Saturation	%	91.9		98.5	90.4	89.5	93.6	96.9	91.5	90.4	87.1
9924	Oxygen, Dissolved as O2	mg/l	10		12.4	9.11	10.3	10.9	12.6	10.6	9.35	8.93

Tell us whether you accept cookies

sampling point Small Brook At Headon Bridge

Determinands

Sampling results

Samples from 14 Jul 2022 to 3 Mar 2023

Samples from 9 Nov 2015 to 7 Jun 2022

sampling point
Small Brook At Headon Bridge