London's Pulse: Medical Officer of Health reports 1848-1972
View report page
Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Islington 1881
[Report of the Medical Officer of Health for Islington, Parish of St Mary]
This page requires JavaScript
WATER ANALYSIS.
In the following tables I have stated the analyses made monthly of the New River Company's Water, and recorded by me during the year.
Analyses of Samples taken from the Works of the Company.
| 1831. | Total Solid Matter. | Chloride of Sodium. | Nitrogen as Nitrates. | Nitrogen as Ammonia. | Oxygen required to oxidise Organic Matter. | Degree of Hardness. | Degree of Hardness after boiling ¼ of an hour. | Organic Carbon. | Organic Nitrogen. |
|---|---|---|---|---|---|---|---|---|---|
| January | 22.25 | 1.77 | 0.229 | 0.000 | 0.078 | 16.0° | 3.7° | ...... | ...... |
| February | 21.90 | 1.77 | 0.250 | 0.000 | 0.036 | 16.5° | 4.2° | ...... | ...... |
| March | 21.15 | 1.888 | 0.292 | 0.000 | 0053 | 17.6° | 3.7° | ...... | ...... |
| April | 17.60 | 2.242 | 0.271 | 0.000 | 0.003 | 16.5° | 3.8° | ...... | ...... |
| May | 18.60 | 1.770 | 0.240 | 0.000 | 00.12 | 15.4° | 3.0° | ...... | ...... |
| June | 18.40 | 1.65 | 0 .14 | 0.000 | 0.020 | 15.4° | 4.37° | ...... | ...... |
| July | 17.30 | 1.65 | 0.10 | 0.000 | 0.012 | 13.7° | 2.9° | ...... | ...... |
| August | 20.70 | 1.534 | 0140 | 0.000 | 0.018 | 14.3° | 3.3° | ...... | ...... |
| September | 18.94 | 1.77 | 0.156 | 0.002 | 0.027 | 15.5° | 3.9° | ...... | ...... |
| October | 20.30 | 1.88 | 0.167 | 0.000 | 0014 | 16.0° | 3.3° | ...... | ...... |
| November | 22.10 | 1.88 | 0271 | 0.000 | 0.023 | 17.5° | 3.0° | ...... | ...... |
| December | 22.05 | 1.88 | 0.261 | 0.001 | 0.063 | 17.0° | 4.2° | ...... | ...... |
| Average | 20.27 | 1.806 | 0.209 | 0.000 | 0030 | 15.9° | 3.6° | ...... | ...... |
Analyses of Samples taken from the Mains of the Company.
| 1881. | Total Solid Matter. | Chloride of Sodium. | Nitrogen as Nitrates. | Nitrogen as Ammonia. | Oxygen required to oxidise Organic Matter. | Degree of Hardness. | Degree of Hardness after boiling ¼ of an hour. | Organic Carbon. | Organic Nitrogen. |
|---|---|---|---|---|---|---|---|---|---|
| January | ...... | 1.711 | 0.234 | 0.000 | 0.039 | 15.6° | ...... | ...... | ...... |
| February | ...... | 1.770 | 0.239 | 0.000 | 0.033 | 17.0° | ...... | 0.106 | 0.024 |
| March | ...... | 1.798 | 0.256 | 0.000 | 0.048 | 17.40° | ...... | 0.093 | 0.017 |
| April | ...... | 1 .809 | 0.274 | 0.000 | 0.032 | 17.20° | ...... | 0.096 | 0.007 |
| May | ...... | 1.770 | 0.224 | 0.000 | 0.016 | 15.7° | ...... | 0.055 | 0012 |
| June | ...... | 1.70 | 0.15 | 0.000 | 0.017 | 15.0° | ...... | 0.075 | 0.018 |
| July | ...... | 1.82 | 0.11 | 0 000 | 0.021 | 14.0° | ...... | 0.062 | 0.018 |
| August | ...... | 1.65 | 0120 | 0.000 | 0.009 | 13.8° | ...... | 0.047 | 0.012 |
| September | ...... | 1.77 | 0.153 | 0.000 | 0.019 | 13.9° | ...... | 0.057 | 0.008 |
| October | ...... | 1.82 | 0.203 | 0.000 | 0.021 | 15.7° | ...... | 0055 | 0.009 |
| November | ...... | 1.88 | 0.234 | 0.000 | 0.022 | 16.8° | ...... | 0.074 | 0.021 |
| December | ...... | 1.88 | 0.250 | 0.001 | 0.053 | 15.6° | ...... | 0.142 | 0.025 |
| Average | ...... | 1.788 | 0.204 | 0.000 | 0.027 | 15.6° | ...... | 0.072 | 0.014 |