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 1888
[Report of the Medical Officer of Health for Islington, Parish of St Mary]
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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.
| 1888. | 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 | 23.96 | 1.296 | 2.124 | 0.292 | 0.000 | 0.004 | 14.6 | 2.7 | .. | .. |
| February | 20.60 | 1.512 | 2.478 | 0.198 | 0.000 | 0.004 | 14.0 | 2.5 | .. | .. |
| March | 18.44 | 1.44 | 2.36 | 0.208 | 0.000 | 0.004 | 14.6 | 2.7 | .. | .. |
| April | 20.14 | 1.44 | 2.36 | 0156 | 0.000 | 0.028 | 15.4 | 4.1 | .. | .. |
| May | 20.24 | 1.368 | 2.242 | 0177 | 0.000 | 0.022 | 14.0 | 4.59 | .. | .. |
| June | 19.80 | 1.368 | 2.242 | 0146 | 0.000 | 0.015 | 13.20 | 2.00 | .. | .. |
| July | 21.40 | 1.368 | 2.242 | 0.146 | 0.000 | 0.015 | 14.21 | 2.09 | .. | .. |
| August | 20.48 | 1.296 | 2.124 | 0.125 | 0.000 | 0.045 | 14.0 | 2.72 | .. | .. |
| September | 21.10 | 1.368 | 2.242 | 0125 | 0.000 | 0.022 | 14.21 | 2.36 | .. | .. |
| October | 20.90 | 1.224 | 2 006 | 0.188 | 0.000 | 0.011 | 14.6 | 2.54 | .. | .. |
| November | 24.30 | 1.368 | 2.242 | 0.198 | 0.000 | 0.049 | 15.47 | 2.54 | .. | .. |
| December | 25.60 | 1.296 | 2.124 | 0.229 | 0.000 | 0.064 | 16.52 | 3.0 | .. | .. |
| Average | 21.41 | 1.362 | 2.232 | 0.182 | 0.000 | 00.23 | 14.56 | 2.82 | .. | .. |
Analyses of Samples taken from the Mains of the Company.
| 1888. | 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 | .. | 1.242 | 2.035 | 0.289 | 0.000 | 0.016 | 15.7 | .. | 0.050 | 0.013 |
| February | .. | 1.44 | 2.36 | 0.268 | 0.000 | 0.005 | 14.4 | .. | 0.038 | 0.011 |
| March | .. | 1.35 | 2.212 | 0.219 | 0.000 | 0.018 | 14.21 | .. | 0.054 | 0.013 |
| April | .. | 1.416 | 2.320 | 0.139 | 0.000 | 0.018 | 14.86 | .. | 0.062 | 0.015 |
| May | .. | 1.314 | 2.153 | 0.153 | 0.000 | 0.024 | 14.11 | .. | 0.065 | 0.014 |
| June | .. | 1.368 | 2.242 | 0.146 | 0.000 | 0.012 | 12.99 | .. | 0.054 | 0.013 |
| July | .. | 1.368 | 2.242 | 0.151 | 0.000 | 0.015 | 13.75 | .. | 0.053 | 0.014 |
| August | .. | 1.350 | 2.212 | 0.132 | 0.000 | 0.021 | 14.5 | .. | 0.049 | 0.014 |
| September | .. | 1.344 | 2.202 | 0.146 | 0.000 | 0.015 | 13.12 | .. | 0.050 | 0.014 |
| October | .. | 1.332 | 2.183 | 0.161 | 0.000 | 0.009 | 14.52 | .. | 0.053 | 0.013 |
| November | .. | 1.386 | 2.271 | 0.190 | 0.000 | 0.017 | 15.3 | .. | 0.054 | 0.014 |
| December | .. | 1.114 | 2.152 | 0.226 | 0.000 | 0.035 | 16.78 | .. | 0.081 | 0.016 |
| Average | .. | 1.352 | 2.215 | 0185 | 0.000 | 0.017 | 14.52 | .. | 0.055 | 0.013 |