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 1882
[Report of the Medical Officer of Health for Islington, Parish of St Mary]
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9
WATER ANALYSIS.
In the following tables I have stated the analyses made monthly of the New
River Company's Water, and recorded by mo during the year.
Analyses of Samples taken from the Works of the Company.
| 1882. | 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 | 23.35 | 1.15 | 1.88 | 0.229 | 0.000 | 0.032 | 16.0 | 4.2 | ...... | ...... |
| February | 22.40 | 1.296 | 2.124 | 0.261 | 0.000 | 0.026 | 1705 | 3.3 | ...... | ...... |
| March | 20.50 | 1.22 | 200 | 0 203 | 0.001 | 0.045 | 15.4 | 3.3 | ...... | ...... |
| April | 18.45 | 1.152 | 1.888 | 0.198 | ...... | 0.023 | 14.3 | 3.3 | ...... | ...... |
| May | 18.90 | 115 | 1.88 | 0.167 | 0000 | 0.057 | 16.0 | 3.7 | ...... | ...... |
| June | 17.40 | 1.296 | 2.124 | 0 161 | 0.000 | 0.026 | 14.8 | 2.4 | ...... | ...... |
| July | 17.6 | 115 | 1.88 | 0.151 | 0.000 | 0.015 | 13.20 | 2.4 | ...... | ...... |
| August | 18.30 | 136 | 2.24 | 0.125 | 0.000 | 0.023 | 11.5 | 2.0 | ...... | ...... |
| September | 18.5 | 115 | 1.88 | 0.167 | o.ooo | 0.019 | 143 | 2.0 | ...... | ...... |
| October | 19.1 | 1.15 | 1.88 | 0.167 | 0.000 | 0.015 | 15.9 | 1.6 | ...... | ...... |
| November | 21.2 | 1.22 | 2.00 | 0 245 | 0.000 | 0.071 | 15.4 | 3.7 | ...... | ...... |
| December | 22 2 | 115 | 1.88 | 0.276 | 0.001 | 0.041 | 16.5 | 2.8 | ...... | ...... |
| Average | 19.83 | 1.204 | 1.971 | 0.196 | 0.000 | 0 033 | 15 0 | 2.9 | ...... | ...... |
Analyses of Samples taken from the Mains of the Company.
| 1882. | 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 | ...... | 1.15 | 1.88 | 0.263 | 0.000 | 0.030 | 16.7 | ...... | 0.100 | 0.018 |
| February | ...... | 1.22 | 2.00 | 0.271 | 0.000 | 0.017 | 16.7 | ...... | 0.071 | 0.025 |
| March | ...... | 1.24 | 2.04 | 0.225 | 0.000 | 0.023 | 15.6 | ...... | 0.069 | 0.014 |
| April | ...... | 1.15 | 1.88 | 0.187 | ...... | 0.020 | 14.8 | ...... | 0.054 | 0.009 |
| May | ...... | 1.20 | 197 | 0.160 | 0.000 | 0.035 | 14.3 | ...... | 0.064 | O.O15 |
| June | ...... | 1.22 | 2.00 | 0.166 | 0.000 | 0.016 | 14.4 | ...... | 0.051 | 0.009 |
| July | ...... | 1.22 | 2.00 | 0.152 | 0.000 | 0.019 | 13.18 | ...... | 0.035 | 0.012 |
| August | ...... | 1.13 | 1.85 | 0.132 | 0.000 | 0.016 | 12.4 | ...... | 0.028 | 0.012 |
| September | ...... | 1.18 | 1.94 | 0.147 | 0.000 | 0.013 | 13.4 | ...... | 0.030 | 0.023 |
| October | ...... | 1.24 | 2.58 | 0.181 | 0.000 | 0.006 | 14.2 | ...... | 0.035 | 0.011 |
| November | ...... | 1.20 | 1.97 | 0.200 | 0.000 | 0.072 | 14.3 | ...... | 0.149 | 0.029 |
| December | ...... | 1.12 | 1.84 | 0.246 | 0.000 | 0.036 | 16.8 | ...... | 0.090 | 0.018 |
| Average | ...... | 1.19 | 1.99 | 0.194 | 0.000 | 0.025 | 14.7 | ...... | 0.064 | 0.020 |