Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Hayes]
This page requires JavaScript
SUMMARY OF REPORTS OF WATER SAMPLES SUBMITTED FOR BACTERIOLOGICAL AND CHEMICAL EXAMINATION BY THE JOINT COMMITTEE OF SIX AUTHORITIES
WITHIN THE SUPPLY AREA OF THE SOUTH WEST SUBURBAN WATER COMPANY.
Report No. and Date. | Authority taking sample | CHEMICAL | BACTERIOLOGICAL | Remarks | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total solids (dried at 120°C.) | Combined chlorine (as CI.) | Equivalent to Sodium Chloride (Na CI.) | Nitric nitrogen (Nitrates) | Nitrous nitrogen (Nitrites) | A mmoniacal nitrogen | Albuminoid nitrogen | Oxygen absorbed in 4 hours at 27°C. | Lead or Copper | Temporary hardness (equivalent to CaCO3) | Permanent hardness (equivalent to CaCO3) | Total hardness (equivalent to CaCO3) | Organisms produced on agar plates incubated at 20°—22°C. for 3 days | Organisms produced on agar plates incubated at 37.5°C. for 2 days | B. coli | Streptococci | Cl. Welchii (Spores) | ||||
38236 2/8/38 | Hayes and Harlington U.D.C. | Parts per 100,000 | 33.0 | 2.30 | 3.80 | 0.18 | Nil | 0.0004 | 0.0044 | 0.076 | Nil | 17.0 | 2.5 | 19.5 | 52 per c.c. | 11 per c.c. | Not found in 100 c.c. | Not found in 30 c.c. | Not found in 100 c.c. | The results show this water to be quite satisfactory for drinking purposes. |
Grains per Gallon | 23.1 | 1.61 | 2.66 | 0.13 | Nil | 0.0003 | 0.0031 | 0.053 | Nil | 11.9 | 1.8 | 13.7 | ||||||||
43504 3/9/38 | Egham U.D.C. | Part per 100,000 | 33.5 | 2.90 | 4.79 | 0.26 | Nil | 0.0010 | 0.0048 | 0.054 | Nil | 20.5 | 3.3 | 23.8 | 15 per c.c. | 4 per c.c. | Not found in 100 c.c. | Not found in 30 c.c. | Not found in 100 c.c. | The results show this water to be satisfactory for drinking purposes. |
Grains per Gallon | 23.5 | 2.03 | 3.35 | 0.18 | Nil | 0.0007 | 0.0034 | 0.038 | Nil | 14.3 | 2.3 | 16.6 | ||||||||
44864 12/9/38 | Feltham U.D.C. | Parts per 100,000 | 30.0 | 2.50 | 4.13 | 0.32 | Nil | 0.0004 | 0.0034 | 0.066 | Nil | 20.5 | 3.0 | 23.5 | 14 per c.c. | 5 per c.c. | Not found in 100 c.c. | Not found in 30 c.c. | Not found in 100 c.c. | The combined chemical and bacteriological results show that this water is suitable for drinking purposes. |
Grains per Gallon | 21.0 | 1.75 | 2.89 | 0.22 | Nil | 0.0003 | 0.0024 | 0.046 | Nil | 14.4 | 2.1 | 16.5 | ||||||||
46962 26/9/38 | Bagshot R.D.C. | Parts per 100,000 | 31.50 | 2.60 | 4.29 | 0.28 | Nil | Nil | 0.0066 | 0.057 | Nil | 20.0 | 2.5 | 22.5 | 625 per c.c. | 82 per c.c. | Not found in 100 c.c. | Not found in 30 c.c. | Not found in 100 c.c. | In regard to the bacterial content the figures compare somewhat unfavourably with the previous sample, but the interval of time in transit of this present sample is much longer and might account for most, if not all, of the increase in numbers. There are no excremental organisms found in the quantities examined and the chemical figures are approximately much the same as in the previous sample. From consideration of the combined results the water is safe for drinking purposes. |
Grains per Gallon | 22.05 | 1.82 | 3.00 | 0.20 | Nil | Nil | 0.0046 | 0.040 | Nil | 14.0 | 1.7 | 15.7 | ||||||||
48896 10/10/38 | East- hampstead R.D.C. | Parts per 100,000 | 31.0 | 2.80 | 4.62 | 0.34 | Nil | 0.0004 | 0.0048 | 0.075 | Nil | 21.0 | 4.0 | 25.0 | 11 per c.c. | 14 per c.c. | Not found in 100 c.c. | Not found in 30 c.c. | Not found in 100 c.c. | The results show this water to be of very good quality and quite satisfactory for drinking purposes. |
Grains per Gallon | 21.7 | 1.96 | 3.23 | 0.24 | Nil | 0.0003 | 0.0034 | 0.053 | Nil | 14.7 | 2.8 | 17.5 | ||||||||
52351 28/10/38 | Windsor R.D.C. | Parts per 100,000 | 34.0 | 2.80 | 4.62 | 0.32 | Nil | 0.0010 | 0.0066 | 0.125 | Nil | 22.3 | 6.0 | 28.3 | 26 per c.c. | 4 per c.c. | Not found in 100 c.c. | Not found in 30 c.c. | Not found in 100 c.c. | The bacteriological results show no excremental organisms and the combined results indicate that the water is safe for drinking purposes. |
Grains per Gallon | 23.8 | 1.96 | 3.23 | 0.22 | Nil | 0.0007 | 0.0046 | 0.088 | Nil | 15.6 | 4.2 | 19.8 | ||||||||
53915 7/11/38 | Hayes and Harlington U.D.C. | Parts per 100,000 | 36.5 | 2.70 | 4.46 | 0.40 | Nil | 0.0006 | 0.0052 | 0.092 | Nil | 23.0 | 6.0 | 29.0 | 8 per ml. | 5 per ml. | Not found in 100 c.c. | Not found in 30 c.c. | Present in 100 c.c. (not found in less) | The combined results show that the water is satisfactory for drinking purposes. |
Grains per Gallon | 25.6 | 1.89 | 3.12 | 0.28 | Nil | 0.0004 | 0.0036 | 0.064 | Nil | 16.1 | 4 2 | 20.3 | ||||||||
57707 28/11/38 | Egham U.D.C. | Parts per 100,000 | 33.5 | 2.20 | 3.63 | 0.40 | Nil | 0.0006 | 0.0054 | 0.114 | Nil | 22.5 | 5.5 | 28.0 | 56 per ml. | 19 per ml. | Not found in 100 c.c. | Not found in 30 c.c. | Present in 100 c.c. (not found in less) | The results obtained show this water to be safe for drinking purposes. |
Grains per Gallon | 23.5 | 1.54 | 2.54 | 0.28 | Nil | 0.0004 | 0.0038 | 0.080 | Nil | 15.7 | 3.9 | 19.6 | ||||||||
60611 12/12/38 | Feltham U.D.C. | Parts per 100,000 | 39.0 | 2.20 | 3.63 | 0.34 | Nil | 0.0010 | 0.0098 | 0.170 | Nil | 20.5 | 8.8 | 29.3 | 42 per ml. | 13 per ml. | Not found in 100 c.c. | Not found in 30 c.c. | Not found in 100 c.c. | From a consideration of these results we are of opinion that this water is satisfactory for drinking purposes. |
Grains per Gallon | 27.3 | 1.54 | 2.54 | 0.24 | Nil | 0.0007 | 0.0069 | 0.119 | Nil | 14.3 | 6.2 | 20.5 | ||||||||
63584 2/1/39 | Bagshot R.D.C. | Parts per 100,000 | 37.0 | 1.90 | 3.14 | 0.40 | Nil | 0.0044 | 0.0058 | 0.120 | Nil | 22.0 | 6.0 | 28.0 | 9 per ml. | 11 per ml. | Not found in 100 ml. | Not found in 30 ml. | Present in 50 ml. | The bacteriological results show that this water is safe for drinking purposes. |
Grains per Gallon | 25.9 | 1.33 | 2.20 | 0.28 | Nil | 0.0031 | 0.0041 | 0.084 | Nil | 15.4 | 4.2 | 19.6 |