London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Islington 1889
[Report of the Medical Officer of Health for Islington, Parish of St. Mary ]
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85
WATER ANALYSIS.
In the following tables I state the analysis (made monthly) of the
New River Company's Water recorded by me during the year.
Analyses of Samples taken from the Works of the Company.
| 1889. | 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 | 25.80 | 1.224 | 2.006 | 0.302 | 0.000 | 0.041 | 17.37 | 3 7 | .. | .. |
| February | 22.30 | 1.224 | 2.006 | 0.271 | 0.000 | 0.022 | 15.8 | 4.0 | .. | .. |
| March | 20.20 | 1.224 | 2.006 | 0.333 | 0.000 | 0.023 | 15.47 | 3.50 | .. | .. |
| April | 22.20 | 1.224 | 2.006 | 0.198 | 0.000 | 0.019 | 14.8 | 3.2 | .. | .. |
| May | 20.60 | 1.152 | 1.888 | 0.177 | 0.000 | 0.022 | 14.7 | 2.9 | .. | .. |
| June | 20.60 | 1.224 | 2.006 | 0.208 | 0.000 | 0.038 | 15.05 | 3.2 | .. | .. |
| July | 23.00 | 1.512 | 2.478 | 0.135 | 0000 | 0015 | 14.42 | 2.10 | .. | .. |
| August | 21.00 | 1.224 | 2.006 | 0.135 | 0.000 | 0.033 | 15.05 | 3.4 | .. | .. |
| September | 21.0 | 1.224 | 2.006 | 0.135 | 0.000 | 0.023 | 14.84 | 3.0 | .. | .. |
| October | 20.30 | 1.152 | 1.888 | 0.188 | 0.000 | 0.018 | 15.05 | 3.20 | .. | .. |
| November | 23.50 | 1.152 | 1.888 | 0.229 | 0.000 | 0.060 | 16.10 | 2.73 | .. | .. |
| December | 25.00 | 1.224 | 2.006 | 0.281 | 0.000 | 0.019 | 16.3 | 3.0 | .. | .. |
| Average | 22.12 | 1.230 | 2.015 | 0.216 | 0.000 | 0.027 | 15.41 | 3.24 | .. | .. |
Analyses of Samples taken from the Mains of the Company.
| 1889. | 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 j of an hour. | Organic Carbon. | Organic Nitrogen. |
|---|---|---|---|---|---|---|---|---|---|---|
| January | .. | 1.224 | 2.006 | 0.302 | 0.000 | 0.027 | 16.83 | .. | 0.070 | 0 016 |
| February | .. | 1.224 | 2.006 | 0.323 | 0.000 | 0.030 | 15.96 | .. | 0.066 | 0.016 |
| March | .. | 1.206 | 1.976 | 0.294 | 0.000 | 0.030 | 15.78 | .. | 0.074 | 0.016 |
| April | .. | 1.176 | 1.894 | 0.208 | 0.000 | 0.021 | 14.91 | .. | 0 063 | 0.015 |
| May | .. | 1.134 | 1.858 | 0.190 | 0.000 | 0.032 | 14.89 | .. | 0.065 | 0.017 |
| June | .. | 1.188 | 1.947 | 0.188 | 0.000 | 0.054 | 14.57 | .. | 0091 | 0.022 |
| July | .. | 1.278 | 2.094 | 0.151 | 0.000 | 0.025 | 14.68 | .. | 0.058 | 0.016 |
| August | .. | 1.188 | 1.947 | 0.159 | 0.000 | 0.017 | 14.21 | .. | 0052 | 0014 |
| September | .. | 1.152 | 1.888 | 0.167 | 0.000 | 0.012 | 14.17 | .. | 0.048 | 0.013 |
| October | .. | 1.152 | 1.888 | 0.198 | 0.000 | 0.016 | 14.78 | .. | 0.058 | 0.014 |
| November | .. | 1.116 | 1.829 | 0.245 | 0.000 | 0.041 | 15.52 | .. | 0 085 | 0.018 |
| December | .. | 0.152 | 1.888 | 0.240 | 0.000 | 0.014 | 16.46 | .. | 0 049 | 0.019 |
| Average | •• | 1.099 | 1.935 | 0.222 | 0.000 | 0.026 | 15.23 | .. | 0.064 | 0.016 |