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For the purpose of assessment and in comparison with standards acceptable to the Ministry
of Housing and Local Government, the following grades have been adopted:—
Physical Properties — Clear, Colourless, Odourless
Quality Plate count per ml Coliforms per 100 ml
Excellent Nil Nil
Good < 100 Nil
Satisfactory < 300 Nil
Suspicious > 300 With < 5
Unsatisfactory > 300 With > 5
Unfit > 300 With > 5 including faecal coli
Supplies from Waterboats—
All samples drawn from waterboats were found to be of excellent quality.
Distribution aboard ships—
Of 137 samples drawn in the crew and passenger accommodation and galleys of ships:—
95 were excellent
24 were good
10 were satisfactory
4 were unsatisfactory, and
4 were unfit.
Storage aboard ships—
Of 6 samples drawn direct from ships' storage tanks:—
5 were excellent, and
1 was good.
Port Installations—
Of 49 samples drawn from dock offices, dock canteens, drinking fountains, etc.: —
48 were excellent, and
1 was satisfactory.
Deep wells-
Three samples were drawn from deep wells in Sheerness Dockyard, of which:—
2 were satisfactory, and
1 was unsatisfactory.
River Thames passenger launches—
Of 31 samples taken under the Food Hygiene (General) Regulations, I960, from storage
tanks and galley and licenced bar taps in River Thames passenger launches:—
9 were excellent
6 were good
1 was satisfactory
7 were unsatisfactory, and
8 were unfit.