sampling point
Rib Below B1386, Gatesbury

Description	RIB BELOW B1386, GATESBURY
Sampling point ID	TH-PLER0479
Type	Freshwater – Unspecified
Status	open
Location	easting northing: 539150 224370 lat lon: 51.900499, 0.021092
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	67 samples taken between 2024 and 2018

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.

15 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
CHLOROPHYLL
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Sld Sus@105C
Temp Water
TurbidityNTU
pH

Displaying the twenty most recent samples. You can see all 67 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 1 Jun 2023 to 6 Mar 2024

Notation	Determinand	Units	1 Jun 2023 10:53	4 Jul 2023 11:23	1 Aug 2023 11:23	1 Sep 2023 08:43	2 Oct 2023 08:22	1 Nov 2023 10:30	5 Dec 2023 09:54	8 Jan 2024 08:28	9 Feb 2024 08:33	6 Mar 2024 09:38
0061	pH		7.64	7.37	7.6	7.15	7.53	7.38	7.95	7.91	8.11	7.79
0076	Temperature of Water	°C	11.1	11.8	13.4	11.6	13.1	11.1	6.8	6	8	8.4
0077	Conductivity at 25 C	μs/cm	777	739	743	713	759	744	724	769	476	788
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	0.033	< 0.03	< 0.03	< 0.03	< 0.03	0.085	0.084	0.21
0116	Nitrogen, Total Oxidised as N	mg/l	9.9	9	8.6	8.3	8.9	9.4	16	11		9.7
0117	Nitrate as N	mg/l	9.88	8.98	8.58	8.28	8.88	9.38	16	11		9.64
0118	Nitrite as N	mg/l	0.022	0.017	0.018	0.016	0.019	0.019	0.012	0.021	0.075	0.061
0119	Ammonia un-ionised as N	mg/l	< 0.00026	< 0.00015	0.00031	< 9.0e-05	< 0.00024	< 0.00014	< 0.00039	0.00094	0.00132	0.00211
0135	Solids, Suspended at 105 C	mg/l	3.6	4.4	3.2	6.5	5.9	5.6	13	5.4	240	7.4
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	290	280	280	270	280	280	250	290	210	290
0180	Orthophosphate, reactive as P	mg/l	0.31	0.32	0.43	0.22	0.42	0.18	0.14	0.18	0.12	0.21
6396	Turbidity	ntu	1.2	< 1	1.6	1.8	3.7	1.9	7.3	4	140	1.8
7887	Chlorophyll : Acetone Extract	μg/l	3.5	1	5.1	2.8	1.2	< 0.5	0.9	< 0.5	1.3	0.67
9901	Oxygen, Dissolved, % Saturation	%	91.4	78.9	86.4	72.1	78.2	75.9	93.5	90.1	96.1	90.8
9924	Oxygen, Dissolved as O2	mg/l	10	8.52	9	7.82	8.2	8.33	11.4	11.2	11.4	10.6

Samples from 5 Aug 2022 to 22 May 2023

Notation	Determinand	Units	5 Aug 2022 13:33	17 Oct 2022 09:42	21 Oct 2022 13:33	4 Nov 2022 11:07	1 Dec 2022 13:59	19 Jan 2023 12:45	6 Feb 2023 15:41	2 Mar 2023 12:32	27 Apr 2023 13:45	22 May 2023 14:24
0061	pH		7.41	7.73	7.77	7.5	7.52	7.75	7.63	7.86	7.31	7.76
0076	Temperature of Water	°C	14.7	11.8	12.4	10	9.3	7	8.3	8.1	10.2	12.6
0077	Conductivity at 25 C	μs/cm	761	764	608	713	733	808	772	782	692	785
0111	Ammoniacal Nitrogen as N	mg/l	0.046	< 0.03	< 0.03	0.13	< 0.03	0.055	< 0.03	0.039	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	8.9	9.6	5.6	19	8.9	11	10	10	8.5	11
0117	Nitrate as N	mg/l	8.88	9.58	5.58	18.9	8.89	11	9.99	9.99	8.5	11
0118	Nitrite as N	mg/l	0.016	0.016	0.023	0.051	0.015	0.03	0.01	0.0094	< 0.004	0.024
0119	Ammonia un-ionised as N	mg/l	0.00031	< 0.00034	< 0.00039	0.00076	< 0.00017	0.00046	< 0.00021	0.00045	< 0.00012	< 0.00038
0135	Solids, Suspended at 105 C	mg/l	86	9.5	9.6	9.4	4.4	14	< 3	11	3.1	8.3
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	280	270	230	200	300	270	270	280	320	270
0180	Orthophosphate, reactive as P	mg/l	0.64	0.76	0.4	0.45	0.21	0.26	0.36	0.34	0.026	0.4
6396	Turbidity	ntu	46	4.3	6.4				1.3	2.9	< 1	1.5
7887	Chlorophyll : Acetone Extract	μg/l	24	6	5.9	3.7	< 0.5	1.2	< 0.5	3.6	0.81	5
9901	Oxygen, Dissolved, % Saturation	%	83.9	74.4	73.3	76.5	73.1	92.3	88	97.1	72.1	102.2
9924	Oxygen, Dissolved as O2	mg/l	8.49	8.04	7.81	8.62	8.37	11.2	10.3	11.5	8.08	10.8

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sampling point Rib Below B1386, Gatesbury

Determinands

Sampling results

Samples from 1 Jun 2023 to 6 Mar 2024

Samples from 5 Aug 2022 to 22 May 2023

sampling point
Rib Below B1386, Gatesbury