sampling point
Counterdrain Welches Dam

Description	COUNTERDRAIN WELCHES DAM
Sampling point ID	AN-52M04
Type	Freshwater – Rivers
Status	open
Location	easting northing: 547000 285800 lat lon: 52.450376, 0.161701
Area	Cambridgeshire And Bedfordshire
Sub-Area	Brampton Team Sub Area
Summary	363 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.

41 determinands have been measured at this site

ALK.0.45um
Alky pH 4.5
Ammonia(N)
BOD ATU
CHLORIDE GFC
CHLOROPHYLL
COD as O2
Chloride Ion
Colour Filt
Cond - Field
Cond @ 20C
Cond @ 25C
N Inorganic
N Oxid Filt
N Oxidised
NATGRIDREF
NH3 filt N
NH3 un-ion
NO FLOW/SAMP
Nitrate-N
Nitrite Filt
Nitrite-N
O Diss %sat
O Diss% Satn
O Dissolved
Oil & Grs Vs
Orthophospht
OrthophsFilt
OrthophsFilt
Oxygen Diss
Phosphorus-P
SALinsitu
Salinity
SiO2 Filt
SiO2 Rv
Sld Sus@105C
Temp Water
Turbidity
TurbidityNTU
pH
pH Inst unit

Displaying the twenty most recent samples. You can see all 363 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 6 Jun 2023 to 8 Mar 2024

Notation	Determinand	Units	6 Jun 2023 14:47	11 Jul 2023 11:01	2 Aug 2023 14:30	21 Sep 2023 09:10	9 Oct 2023 09:58	6 Nov 2023 12:00	6 Dec 2023 09:24	2 Jan 2024 13:49	5 Feb 2024 14:19	8 Mar 2024 15:35
0076	Temperature of Water	°C	16.6	20.2	19.9	16.5	15.7	9.6	5	8	9.1	8.8
0077	Conductivity at 25 C	μs/cm	1771	1017	937	1024	1688	1907	1925	1846	1848	1870
0085	BOD : 5 Day ATU	mg/l	1.6	1.8	< 3	< 1	< 3	< 1	< 1	1.2	1	< 2
0092	Chemical Oxygen Demand :- {COD}	mg/l	51	19	17	32	52	72	47	44		45
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.032	< 0.03	< 0.03	< 0.03	0.59	1.6	1.6	1.5	1.4
0116	Nitrogen, Total Oxidised as N	mg/l	3.9	0.29	0.83	< 0.2	0.49	18	14	12	7.2	9.4
0117	Nitrate as N	mg/l	3.87	0.284	0.818	< 0.196	0.414	17.8	13.9	11.9	7.1	9.31
0118	Nitrite as N	mg/l	0.026	0.0062	0.012	< 0.004	0.076	0.24	0.11	0.11	0.1	0.088
0135	Solids, Suspended at 105 C	mg/l	4.2	5.3	< 3	3.3	6	12	11	10	11	12
0172	Chloride	mg/l	99	110	97	110	120	90	93	85	98	86
0180	Orthophosphate, reactive as P	mg/l	< 0.01	< 0.01	< 0.01	0.021	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
0182	Silica, reactive as SiO2	mg/l	1.6	0.27	1.7	6.7	9.6	16	15	14	11	11
0348	Phosphorus, Total as P	mg/l	0.012	0.022	0.019	0.031	0.026	0.019	0.016	0.024	0.031	0.031
7887	Chlorophyll : Acetone Extract	μg/l	2.5	2.4		3.7	5.9	1	0.8	0.79	3.3	1.9
9901	Oxygen, Dissolved, % Saturation	%	113.3	102.3	103.6	53.8	32.4	65.8	67.8	82.9	94.1	84
9924	Oxygen, Dissolved as O2	mg/l	11	9.23	9.41	5.24	3.21	7.48	8.64	9.79	10.8	9.73

Samples from 18 Oct 2022 to 18 May 2023

Notation	Determinand	Units	18 Oct 2022 14:44	14 Nov 2022 13:56	22 Nov 2022 16:37	30 Nov 2022 11:25	5 Dec 2022 13:44	17 Jan 2023 13:15	8 Feb 2023 11:40	8 Mar 2023 09:29	20 Apr 2023 10:14	18 May 2023 13:07
0061	pH						7.3	7.49	7.55	7.77
0076	Temperature of Water	°C	12.6	10.9			6.1	3.2	4.5	4.8	11.7	16.3
0077	Conductivity at 25 C	μs/cm	1716	1531			1927	2188	1912	1862	2015	1718
0085	BOD : 5 Day ATU	mg/l	2.4	< 2			< 1	< 1	< 3	1.5	1.2	1.4
0092	Chemical Oxygen Demand :- {COD}	mg/l	30	48			53	45	37	36	42	46
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	0.067			0.58	1.4	1.3	0.61	0.43	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	< 0.2	0.36			6.8	10	6.3	3.9	8.2	8.2
0117	Nitrate as N	mg/l	< 0.196	0.32			6.64	9.91	6.23	3.86	8.06	8.12
0118	Nitrite as N	mg/l	< 0.004	0.04			0.16	0.095	0.068	0.036	0.14	0.081
0135	Solids, Suspended at 105 C	mg/l	8	4.3			6.6	6.6	5.3	9	7.4	4.7
0172	Chloride	mg/l	310	140			120	130	110	110	120	89
0180	Orthophosphate, reactive as P	mg/l	0.13	0.016			< 0.01	0.018	< 0.01	< 0.01	< 0.01	< 0.01
0182	Silica, reactive as SiO2	mg/l	5.8	3.8			14	14	11	7.2	6.2	7.8
0348	Phosphorus, Total as P	mg/l	0.19	0.037			0.016	0.015	< 0.01	< 0.01	0.022	0.016
7887	Chlorophyll : Acetone Extract	μg/l		11	22	4.6	8.1	0.84	2.7	6.2	5.4	5.4
9901	Oxygen, Dissolved, % Saturation	%	83.2	47.1			63.1	71.2	64.5	78.9	89.3	114.1
9924	Oxygen, Dissolved as O2	mg/l	8.8	5.19			7.81	9.51	8.32	10.1	9.66	11.2

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sampling point Counterdrain Welches Dam

Determinands

Sampling results

Samples from 6 Jun 2023 to 8 Mar 2024

Samples from 18 Oct 2022 to 18 May 2023

sampling point
Counterdrain Welches Dam