sampling point
River Lew U/S Bridestowe Stw

Description	RIVER LEW (TAMAR) ABOVE BRIDESTOWE STW
Sampling point ID	SW-81261458
Type	Freshwater – Rivers
Status	open
Location	easting northing: 250134 89207 lat lon: 50.683165, -4.122743
Area	Devon And Cornwall
Sub-Area	Central Devon And Cornwall
Summary	40 samples taken between 2024 and 2015

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.

13 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
BOD ATU
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Temp Water
pH

Displaying the twenty most recent samples. You can see all 40 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 4 Sep 2023 to 17 Jun 2024

Notation	Determinand	Units	4 Sep 2023 13:27	20 Oct 2023 13:04	21 Nov 2023 09:57	6 Dec 2023 10:20	17 Jan 2024 10:35	31 Jan 2024 09:39	19 Feb 2024 10:39	20 Mar 2024 09:58	22 Apr 2024 14:59	17 Jun 2024 09:44
0061	pH		6.62	7.73	7.51	7.27	7.29	7.54	7.36	7.24	7.57	7.61
0076	Temperature of Water	°C	18.9	12.7	10.4	7.8	5.2	6.8	10	10.7	12.1	12.8
0077	Conductivity at 25 C	μs/cm	155	140	126	132	150	142	114	125	143	150
0085	BOD : 5 Day ATU	mg/l							1	< 1	< 1	< 1
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.66	0.78	1	1.2	1.2	1.2	1.3	1.1	0.83	0.79
0117	Nitrate as N	mg/l	0.656	0.776	0.996	1.2	1.2	1.2	1.3	1.1	0.826	0.786
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	< 0.004	0.0046	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 5.0e-05	< 0.00036	< 0.00018	< 9.0e-05	< 8.0e-05	< 0.00015	< 0.00013	< 0.0001	< 0.00024	< 0.00028
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	35	30	28	27	32	28	20	23	31	33
0180	Orthophosphate, reactive as P	mg/l	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	96.7	99.4	98.6	97.5	100.3	99.2	100.9	97.1	105.3	100.4
9924	Oxygen, Dissolved as O2	mg/l	8.97	10.5	11	11.6	12.7	12.1	11.4	10.8	11.3	10.6

Samples from 2 Aug 2021 to 30 Aug 2023

Notation	Determinand	Units	2 Aug 2021 09:48	14 Sep 2021 14:06	8 Oct 2021 15:46	23 Nov 2021 10:42	7 Dec 2021 13:06	16 Dec 2021 09:52	26 Apr 2023 12:18	19 Jun 2023 14:33	27 Jul 2023 13:23	30 Aug 2023 15:24
0061	pH		8.1	7.71	7.35	7.28	7.34	7.38	7.6	7.56	7.55	7.7
0076	Temperature of Water	°C	13.9	16.4	14.1	6.9	7.8	9.4	9.2	18.7	15.7	14.4
0077	Conductivity at 25 C	μs/cm	170	185	121	148	107	134	149	190	123	154
0085	BOD : 5 Day ATU	mg/l								< 1
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	0.062	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	1	0.76	1.1	0.93	0.66	1.1	0.98	0.88	0.51	0.64
0117	Nitrate as N	mg/l	0.988	0.756	1.1	0.926	0.656	1.1	0.976	0.876	0.506	0.636
0118	Nitrite as N	mg/l	0.012	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.00073	< 0.00045	< 0.00017	< 8.0e-05	0.00021	< 0.00013	< 0.00021	< 0.00038	< 0.0003	< 0.00038
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	36	42	24	35	22	29	32	42	25	32
0180	Orthophosphate, reactive as P	mg/l	0.016	0.023	< 0.01	< 0.01	0.035	< 0.01	< 0.01	0.011	0.016	< 0.01
9901	Oxygen, Dissolved, % Saturation	%	99	100	103.3	99	98.6	94.5	96.8	101.3	100.4	100.9
9924	Oxygen, Dissolved as O2	mg/l	10.2	9.76	10.6	12	11.7	10.8	11.1	9.43	9.95	10.3

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sampling point River Lew U/S Bridestowe Stw

Determinands

Sampling results

Samples from 4 Sep 2023 to 17 Jun 2024

Samples from 2 Aug 2021 to 30 Aug 2023

sampling point
River Lew U/S Bridestowe Stw