sampling point
R Blackwater Wellow

Description	RIVER BLACKWATER AT WELLOW MILL
Sampling point ID	SO-G0003994
Type	Freshwater – Rivers
Status	open
Location	easting northing: 431170 119564 lat lon: 50.974648, -1.557411
Area	Solent And South Downs
Sub-Area	L&W West Ssd
Summary	255 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.

27 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
BOD ATU
C - Org Filt
COPA
Calcium - Ca
Chloride Ion
Cond @ 20C
Cond @ 25C
Copper - Cu
Cu Filtered
Hardness
Magnesium-Mg
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
OrthophsFilt
Oxygen Diss
Phosphorus-P
Sld Sus@105C
Temp Water
Zinc - as Zn
Zn- Filtered
pH

Displaying the twenty most recent samples. You can see all 255 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 17 Oct 2023 to 15 Jul 2024

Notation	Determinand	Units	17 Oct 2023 10:19	20 Nov 2023 14:04	4 Dec 2023 12:52	15 Jan 2024 14:32	19 Feb 2024 13:37	22 Mar 2024 11:32	23 Apr 2024 17:56	13 May 2024 11:29	17 Jun 2024 10:45	15 Jul 2024 07:33
0061	pH		7.43	7.32	7.14	7.59	7.51	7.82	7.92	7.84	7.68	7.66
0076	Temperature of Water	°C	10	10.4	7.3	5.6	10.1	10.9	11	13.9	13	13.7
0077	Conductivity at 25 C	μs/cm	412	265	158	431	253	429	486	488	487	500
0085	BOD : 5 Day ATU	mg/l					1.3	< 2	1	< 1	< 1	< 1
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	0.045	0.042	0.039	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	3.2	1.6	0.98	5	1.9	4.7	6.3	5.9	5.9	6.1
0117	Nitrate as N	mg/l	3.19	1.59	0.976	4.99	1.89	4.69	6.29	5.89	5.89	6.09
0118	Nitrite as N	mg/l	0.0056	0.0063	0.0043	0.012	0.0081	0.013	0.013	0.013	0.012	0.011
0119	Ammonia un-ionised as N	mg/l	< 0.00015	< 0.00012	9.0e-05	0.00022	0.00023	< 0.00039	< 0.00049	< 0.00051	< 0.00033	< 0.00033
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	120	75	40	150	74	150	170	170	160	160
0180	Orthophosphate, reactive as P	mg/l	0.044	0.065	0.064	0.042	0.049	0.041	0.038	0.045	0.047	0.081
9901	Oxygen, Dissolved, % Saturation	%	85.8	89.5	87	92.7	93.3	93.7	97.2	92.8	94.1	85
9924	Oxygen, Dissolved as O2	mg/l	9.67	9.99	10.5	11.6	10.5	10.3	10.7	9.56	9.89	8.8

Samples from 2 Dec 2022 to 6 Sep 2023

Notation	Determinand	Units	2 Dec 2022 09:32	17 Jan 2023 12:43	21 Feb 2023 09:32	9 Mar 2023 12:15	16 May 2023 09:28	8 Jun 2023 14:09	16 Jun 2023 12:57	17 Jul 2023 13:41	8 Aug 2023 09:24	6 Sep 2023 12:32
0061	pH		7.51	7.21	7.77	7.49	7.6	7.78	7.79	7.54	7.45	7.74
0076	Temperature of Water	°C	6.9	4	9.2	5.8	11.2	14.8	16.4	15.2	14.1	17.2
0077	Conductivity at 25 C	μs/cm	341	231	429	309	411	510	537	467	441	548
0085	BOD : 5 Day ATU	mg/l							< 1
0111	Ammoniacal Nitrogen as N	mg/l	0.033	0.055	< 0.03	0.099	< 0.03	< 0.03	< 0.03	< 0.03	0.034	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	2.7	1.9	4.7	2.3	3.8	5.9	7	4.7	4.2	7.2
0117	Nitrate as N	mg/l	2.7	1.89	4.69	2.29	3.79	5.89	6.99	4.69	4.19	7.19
0118	Nitrite as N	mg/l	0.005	0.0053	0.0099	0.011	0.0093	0.01	0.012	0.011	0.014	0.009
0119	Ammonia un-ionised as N	mg/l	0.00016	0.00011	< 0.00031	0.00041	< 0.00024	< 0.00047	< 0.00054	< 0.00028	0.00024	< 0.00052
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	78	53	140	65	130	170	170	150	130	150
0180	Orthophosphate, reactive as P	mg/l	0.04	0.048	0.033	0.026	0.052	0.016	0.025	0.036	0.052	0.065
9901	Oxygen, Dissolved, % Saturation	%	90	90.8	92.4	95	91.7	102.7	96.7	89.8	84.2	85.3
9924	Oxygen, Dissolved as O2	mg/l	10.9	11.9	10.6	11.9	10	10.4	9.44	8.99	8.64	8.19

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sampling point R Blackwater Wellow

Determinands

Sampling results

Samples from 17 Oct 2023 to 15 Jul 2024

Samples from 2 Dec 2022 to 6 Sep 2023

sampling point
R Blackwater Wellow