Euan Black

WATER HYGIENE

- THE IMPORTANCE OF WATER

- WATERBORNE DISEASES

- RESTRICTED OPERATIONS

- PERSONAL RESPONSIBILITY

- WORKING ENVIRONMENT & EQUIPMENT

- DISINFECTION / CHLORINATION

WATER HYGIENE

THE IMPORTANCE OF WATER

- How much of our planet is covered by water?

- What percentage is suitable for use?

- Water covers 70% of our planet

- 97% is undrinkable seawater

- Another 2% is locked in the polar ice-caps

- Leaving 1% available for human use... and

over half of that is polluted

WATER HYGIENE

- How long can the human body go without food?

- How long can the human body go without water?

- You can live for three weeks without food,

but without water you'll be dead in three
days

- Just as our planet is 70% water, our bodies

are 70% water

WATER HYGIENE

WHERE? WHY? HOW? WHEN?

WATER HYGIENE

- BEST PRACTICE

- GLOBAL STANDARDS

- GOOD WORKING PRACTICE

WATER HYGIENE

WATER HYGIENE

WATER HYGIENE

WATER HYGIENE

• Expectation from supplier

• Date of Expiry

• Colour

• Smell

• Temperature

• Storage

WATER HYGIENE

• Expectation from supplier

• Date of Expiry

• Colour

• Smell

• Temperature

• Storage

WATER HYGIENE

WATERBORNE DISEASES

BROAD STREET PUMP
CHOLERA 1854

WATER HYGIENE

1854

Cholera

London

500+ deaths

1937

Typhoid

Croydon

341 cases, 43 deaths

1980

Gastroenteritis

Bramham, Yorkshire

3000+ cases

1985

Giardiasis

Bristol

108 cases

1993

Cryptosporidiosis

Milwaukee

440,000 cases, 110 deaths

2000

E.coli O157

Walkerton, Canada

2300 cases, 7 deaths

WATER HYGIENE

- Development of guidelines

Organisations

The Drinking Water Quality Regulator

(DWQR)

Scotland

WATER HYGIENE

RESTRICTED OPERATIONS

Restricted operations’ defines work which may
involve direct contact with :

- water at any stage in its distribution to the

point where it is made available to
consumers.

- any parts, equipment or machinery within
water systems that can come in contact with
water at any stage in its distribution to the
point where it is made available to consumer.

Should Water Be A Restricted Operation??

Yes or No?

What is a Restricted Operation?

- An area or working environment of given

dimensions in which tasks interacting with the
system can cause detrimental effects to machinery
or human health.

WATER HYGIENE

PERSONAL RESPONSIBILITY

You have persistent diarrhoea

You are suffering from persistent vomiting

You have a prolonged unexplained fever

You have jaundice or hepatitis

You have dysentery

You or a member of your family have been diagnosed
with typhoid/paratyphoid or have a prolonged fever

Do not work on restricted operations if

:

WATER HYGIENE

WORKING ENVIRONMENT & EQUIPMENT

- Ensure relevant, dedicated clothing is worn for the job that is being carried out

- When working on both clean water and sewerage operations a separate set of

clothing and footwear must be worn

- Always clean tools thoroughly before disinfecting.

- Ensure parts tools pipes etc. are off the ground as dirt can retain contamination

- Protect stored pipe ends using appropriate cap or plug

- Inspect parts for soil ingress and foreign objects

• Ensure that chlorine solution is fresh for the day of use (i.e.

before ‘expiry date’)

• Good Practice is to make a new solution each day

• Always use approved products

• Ensure you understand and follow the company procedure

regarding chlorine strength for the relevant task

WATER HYGIENE