sampling point
Chignall Bk. Roxwell Rd. One Bridge

Description	CHIGNALL BK. ROXWELL RD. ONE BRIDGE CHELMSFORD
Sampling point ID	AN-CHIGN070
Type	Freshwater – Rivers
Status	open
Location	easting northing: 568690 207500 lat lon: 51.740808, 0.441849
Area	Essex Norfolk And Suffolk
Sub-Area	Essex Team Sub Area
Summary	87 samples taken between 2024 and 2011

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 87 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 13 Oct 2023 to 25 Jun 2024

Notation	Determinand	Units	13 Oct 2023 11:17	23 Oct 2023 12:26	24 Nov 2023 15:05	8 Dec 2023 15:30	19 Jan 2024 12:05	20 Feb 2024 12:52	18 Apr 2024 11:32	14 May 2024 13:32	31 May 2024 11:03	25 Jun 2024 10:19
0061	pH		7.76	7.91	7.94	8.01	8.28	8.08	8.03	7.76	8.15	8.03
0076	Temperature of Water	°C	16.1	11.1	8.7	7.6	3.4	8.8	9.2	14.3	11.8	14.7
0077	Conductivity at 25 C	μs/cm	568	876	878	839	893	803	832	528	857	842
0085	BOD : 5 Day ATU	mg/l						1.2	1.1	< 4	< 1	< 1
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	0.062	< 0.03	< 0.03	0.058	< 0.03	0.032
0116	Nitrogen, Total Oxidised as N	mg/l	5.7	12	16	22	15	14	12	5.2	13	14
0117	Nitrate as N	mg/l	5.68	12	16	22	15	14	12	5.15	13	14
0118	Nitrite as N	mg/l	0.016	0.015	0.021	0.018	0.019	0.015	0.022	0.051	0.034	0.034
0119	Ammonia un-ionised as N	mg/l	< 0.0005	< 0.00048	< 0.00043	< 0.00046	0.0007	< 0.0005	< 0.00052	0.00084	< 0.00062	0.00082
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	170	250	260	250	290	270	260	170	270	250
0180	Orthophosphate, reactive as P	mg/l	0.14	0.1	0.066	0.07	0.065	0.053	0.071	0.11	0.1	0.11
9901	Oxygen, Dissolved, % Saturation	%	82.4	88.7	87.7	92.9	94.1	95.8	95.8	85.1	94.8	89.9
9924	Oxygen, Dissolved as O2	mg/l	8.09	9.74	10.2	11.1	12.5	11.1	11	8.69	10.2	9.1

Samples from 8 Nov 2016 to 27 Sep 2023

Notation	Determinand	Units	8 Nov 2016 11:24	5 Dec 2016 12:51	11 Jan 2017 10:40	9 Feb 2017 13:07	8 Mar 2017 12:20	21 Apr 2023 14:19	22 May 2023 12:06	29 Jun 2023 10:18	24 Aug 2023 13:37	27 Sep 2023 14:33
0061	pH		8.02	7.74	8.14	8.18	8.01	8	8.03	7.4	7.99	8
0076	Temperature of Water	°C	7	6	7.9	4.6	9.4	9.2	12.3	16	17.8	15.7
0077	Conductivity at 25 C	μs/cm	852	807	880	884	817	872	893	379	798	864
0085	BOD : 5 Day ATU	mg/l							< 1	< 6
0111	Ammoniacal Nitrogen as N	mg/l	1.09	0.331	< 0.03	< 0.03	0.06	0.032	0.08	0.033	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	10.4	7.46	9.2	16.4	10.2	13	13	3.6	9.9	12
0117	Nitrate as N	mg/l	9.87	7.13	9.18	16.4	10.2	13	12.9	2.78	9.89	12
0118	Nitrite as N	mg/l	0.532	0.33	0.021	0.0174	0.0271	0.025	0.1	0.82	0.012	0.014
0119	Ammonia un-ionised as N	mg/l	0.016	0.00249	< 0.00047	< 0.00037	0.00105	0.00055	0.00173	0.00024	< 0.00094	< 0.00083
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	258	221	258	241	245	290	280	97	220	250
0180	Orthophosphate, reactive as P	mg/l	0.259	0.213	0.103	0.072	0.075	0.047	0.097	0.098	0.19	0.11
9901	Oxygen, Dissolved, % Saturation	%	82.4	78.8	90.2	96.8	98.9	89.9	94.6	46.6	94.7	86
9924	Oxygen, Dissolved as O2	mg/l	9.99	9.8	10.7	12.5	11.3	10.3	10.1	4.59	8.98	8.52

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sampling point Chignall Bk. Roxwell Rd. One Bridge

Determinands

Sampling results

Samples from 13 Oct 2023 to 25 Jun 2024

Samples from 8 Nov 2016 to 27 Sep 2023

sampling point
Chignall Bk. Roxwell Rd. One Bridge