sampling point
Rib At Aspenden Bridge, Aspenden

Description	RIB AT ASPENDEN BRIDGE, ASPENDEN
Sampling point ID	TH-PLER0298
Type	Freshwater – Unspecified
Status	open
Location	easting northing: 536338 228550 lat lon: 51.938752, -0.018099
Area	Hertfordshire And North London
Sub-Area	L&W Herts & North London
Summary	74 samples taken between 2024 and 2017

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.

24 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
B-[a]-pyrene
B-[b]-fluora
B-[ghi]-pery
B-[k]-fluora
BOD ATU
Chloride Ion
Cond @ 25C
Fluoranthene
HBCDD
Ind123pyrene
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
PFOS
Sld Sus@105C
Temp Water
pFoctanoate
pH

Displaying the twenty most recent samples. You can see all 74 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 17 Jul 2023 to 4 Apr 2024

Notation	Determinand	Units	17 Jul 2023 08:13	1 Aug 2023 10:31	6 Sep 2023 09:26	4 Oct 2023 13:40	3 Nov 2023 10:14	5 Dec 2023 09:22	4 Jan 2024 09:35	1 Feb 2024 12:42	7 Mar 2024 11:20	4 Apr 2024 11:26
0061	pH		7.84	7.97	7.64	7.58	8.2	8.36	8.21	8.04	8.07
0076	Temperature of Water	°C	16.5	18	20.2	17.5	10.5	6.6	7.7	8.7	8.8
0077	Conductivity at 25 C	μs/cm	963	1061	1269	767	679	720	737	969	850
0085	BOD : 5 Day ATU	mg/l	< 3	< 3	< 3	< 2	1.2	< 3	1.7	1.7	1.4	2.3
0111	Ammoniacal Nitrogen as N	mg/l	0.074	0.08	0.087	0.12	0.073	< 0.03	0.16	0.086	0.086	< 0.5
0116	Nitrogen, Total Oxidised as N	mg/l	19	22	28	29	18	15	13	22	14	7.5
0117	Nitrate as N	mg/l	18.9	21.9	27.9	28.9	18	15	13	21.9	13.9
0118	Nitrite as N	mg/l	0.1	0.1	0.13	0.13	0.017	0.016	0.038	0.06	0.054
0119	Ammonia un-ionised as N	mg/l	0.00151	0.00244	0.00148	0.00147	0.00138	< 0.00043	0.00247	0.00143	0.00144
0135	Solids, Suspended at 105 C	mg/l	31	21	32	84	35	15	9.1	11	6.2	23
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	200	220	230	200	230	240	260	250	280
0172	Chloride	mg/l	95	110	140	120	19	31	27	72	45	31
0180	Orthophosphate, reactive as P	mg/l	3.3	4.2	6.6	4.6	0.18	0.27	0.3	1.9	0.71	< 0.5
9901	Oxygen, Dissolved, % Saturation	%	80	86.9	83.4	87.6	99.9	96.8	96.5	100.2	102.3
9924	Oxygen, Dissolved as O2	mg/l	7.79	8.2	7.52	8.35	11.1	11.8	11.5	11.6	11.9

Samples from 6 Oct 2022 to 30 Jun 2023

Notation	Determinand	Units	6 Oct 2022 12:43	18 Oct 2022 10:09	4 Nov 2022 10:33	6 Dec 2022 12:09	1 Feb 2023 14:08	2 Mar 2023 10:57	30 Mar 2023 11:34	18 May 2023 15:49	1 Jun 2023 09:36	30 Jun 2023 14:53
0061	pH		7.85	7.72	7.8	7.7	7.93	7.87	8.4	7.98	7.84	7.77
0076	Temperature of Water	°C	16.9	15.5	11.5	10.5	10	9.2	11.3	14.6	13.8	18.9
0077	Conductivity at 25 C	μs/cm	1175	1170	809	1177	1102	1161	766	979	1078	988
0085	BOD : 5 Day ATU	mg/l	1.4	1.3	1.4	1.9	3.5	5.5	1.3	1.3	1.9	1.2
0111	Ammoniacal Nitrogen as N	mg/l	0.048	0.092	0.031	0.41	0.37	0.19	< 0.03	0.52	0.09	0.24
0116	Nitrogen, Total Oxidised as N	mg/l	34	28	17	29	28	31	12	19	28	22
0117	Nitrate as N	mg/l	33.9	27.9	17	28.7	27.8	30.8	12	18.8	27.9	21.9
0118	Nitrite as N	mg/l	0.075	0.11	0.047	0.27	0.2	0.19	0.018	0.16	0.11	0.12
0119	Ammonia un-ionised as N	mg/l	0.00103	0.00133	0.0004	0.00392	0.00576	0.00243	< 0.0006	0.0127	0.00151	0.00499
0135	Solids, Suspended at 105 C	mg/l	12	4.7	6.1	6.7	32	130	7.4	5.6	6.3	16
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	200	240	190	230	210	210	260	240	220	190
0172	Chloride	mg/l	130	120	63	120	100	120	41	76	100	100
0180	Orthophosphate, reactive as P	mg/l	5.6	6.2	2	4.3	2.6	4.2	0.55	2	3.2	4.8
9901	Oxygen, Dissolved, % Saturation	%	88.6	83.4	87.2	85.2	93.2	97.8	93.1	105.5	88.8	88.3
9924	Oxygen, Dissolved as O2	mg/l	8.55	8.29	9.48	9.47	10.5	11.2	10.2	10.7	9.16	8.18

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sampling point Rib At Aspenden Bridge, Aspenden

Determinands

Sampling results

Samples from 17 Jul 2023 to 4 Apr 2024

Samples from 6 Oct 2022 to 30 Jun 2023

sampling point
Rib At Aspenden Bridge, Aspenden