[Report of the Medical Officer of Health for Islington, Parish of St. Mary ] page 126

St Mary (Islington) 1892

[Report of the Medical Officer of Health for Islington, Parish of St. Mary ]

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126
WATER ANALYSIS.
In the following tables I state the analyses (made monthly) of the
New River Company's Water recorded during the year.

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Analyses of Samples taken from the Works of the Company.

1892.	Total Solid Matter.	Chlorine.	Equal to Chloride of Sodium.	Nitrogen as Nitrates.	Nitrogen as Ammonia.	Oxygen required to oxidise Organic Matter.	Degree of Hardness.	Degree after boiling ¼ of an hour.	Organic Carbon.	Organic Nitrogen.
January	23.60	1.296	2.124	0.406	None	0.035	16.31	340	..	..
February	returns not received.
March	returns not received.
April	19.80	1.368	2.249	0.229	„	0.010	16.52	2.50	..	..
May	20.00	1.296	2.124	0.188	„	0.008	15.89	3.19	..	..
June	20.00	1.290	2.120	0.180	„	0.010	14.42	2.09	..	..
July	19.90	1.368	2.242	0.135	„	0.008	13.39	2.91	..	..
August	19.20	1.368	2242	0.177	„	0.012	13.80	2.70	..	..
September	24.00	1.296	2.124	0.240	„	0.015	14.00	2.46	..	..
October	23.80	1.296	2.124	0.343	„	0.032	14.84	3.00	..	..
November	24.10	1.224	2.006	0.229	„	0.056	17.58	3.50	..	..
December	26.90	1.224	2.006	0.261	„	0.035	18.22	4.40	..	..
Average	22.13	1.302	2.136	0.238	None	0.022	15.49	3.01	..	..

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Analyses of Samples taken from the Mains of the Company.

1892.	Total Solid Matter.	Chlorine.	Equal to Chloride of Sodium.	Nitrogen as Nitrates.	Nitrogen as Ammonia.	Oxygen required to oxidise Organic Matter.	Degree of Hardness.	Degree after boiling £ of an hour.	Organic Carbon. _	Organic Nitrogen.
January	• •	1.296	2.124	0.377	None	0.021	17.32	..	0.068	0.016
February	returns not received.
March	returns not received.
April	..	1.350	2.212	0.214	„	0.012	14.94	..	0.050	0.015
May	..	1.350	2.212	0.175	„	0.011	15.00	..	0.040	0.011
June	..	1.320	2.160	0.150	„	0.014	14.28	..	0.042	0.010
July	..	1.350	2.212	0.151	„	0.018	13.77	..	0.047	0.013
August	..	1.350	2.212	0.198	„	0.018	14.26	..	0.055	0.014
September	..	1.296	2.124	0.288	„	0.018	14.07	..	0.054	0.013
October	..	1.242	2.035	0.312	„	0.023	15.10	..	0.059	0.017
November	..	1.242	2.035	0.219	„	0.040	17.42	..	0.087	0.018
December	..	1.188	1.947	0.276	„	0.038	18.58	..	0.083	0.022
Average	• •	1.298	2.127	0.236	None	0.021	15.47	..	0.058	0.014