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
Bexley 1965
[Report of the Medical Officer of Health for Bexley]
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METROPOLITAN WATER BOARD — Water Examination Department
Average results of the chemical examination of Water
supplied to the London Borough of Bexley for 1969
Milligrammes per litre (unless otherwise stated)
| Description of the Sample | Number of Samples Day of the month | Ammoni- acal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs.from KMn04 4 hrs.at 27°C. | B.O.D. 5 days at 20°C. | Hardness (total) C3CO3 | Hardness non carbonate CaC03 | Magnesium as Mg | Sodium as Na | Potassium as K |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) |
| River Thames — Derived | 371 | 0.024 | 0.083 | 4.4 | 1.05 | 282 | 79 | 5 | 24.0 | 5.4 | |
| Bexley | 4 | 0.008 | 0.017 | 5.4 | 0.30 | 335 | 90 | ||||
| (a) Crayford No.1 | 4 | 0.013 | 0.048 | 9.3 | 0.38 | 416 | 159 | ||||
| (b) Crayford No.2 | 4 | 0.004 | 0.022 | 6.9 | 0.08 | 305 | 79 | ||||
| (c) Crayford No.3 | 4 | 0.005 | 0.033 | 7.2 | 0.22 | 356 | 118 | ||||
| Darenth | 4 | 0.006 | 0.016 | 4.6 | 0.12 | 276 | 54 | ||||
| Eynsford | 8 | 0.008 | 0.018 | 4.7 | 0.08 | 272 | 51 | ||||
| Horton Kirby | 8 | 0.019 | 0.025 | 4.7 | 0.12 | 277 | 58 | ||||
| Wansunt | 32 | 0.086 | 0.037 | 6.6 | 0.23 | 256 | 107 | ||||
| Wilmington | 3 | 0.011 | 0.033 | 7.6 | 0.12 | 295 | 70 | ||||
| Description of the Sample | Chloride as CI | Phosphate as P04 | Silicate as Si02 | Sulphate as S04 | Natural Fluoride as F | Surface-active material as Vlanoxol OT | Turbidity units | Colour ! Burgess units) | pH value | Electrical Conductivity (microm-hos) | |
| (1) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| River Thames — Derived | 32 | 2.1 | 9 | 58 | 0.25 | 0.02 | 0.1 | 11 | 7.9 | 550 | |
| Bexley | 20 | 0.15 | 0.0 | 4 • | 7.2 | 600 | |||||
| (a) Crayford No.1 | 33 | 0.25 | 0.1 | 3 | 7.1 | 750 | |||||
| (b) Crayford No.2 | 28 | 0.20 | 0.1 | 1 | 7.4 | 580 | |||||
| (c) Crayford No.3 | 29 | 0.20 | 0.0 | 2 | 7.3 | 660 | |||||
| Darenth | 18 | 0.15 | 0.0 | 2 | 7.4 | 490 | |||||
| Eynsford | 16 | 0.10 | 0.1 | 0 | 7.2 | 480 | |||||
| Horton Kirby | 20 | 0.15 | 0.0 | 2 | 7.3 | 500 | |||||
| Wansunt | 29 | 0.20 | 0.4 | 3 | 7.2 | 650 | |||||
| Wilmington | 27 | 0.15 | 0.0 | 0 | 7.3 | 560 | |||||