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Water Analysis


AquaGib - Water Analysis in GibraltarProviding clean, healthy, drinkable water is AquaGib’s bread and butter. It’s our job; so we take it very seriously. In fact, we take our water so seriously that we want to share the process with you, just to give you that extra peace of mind.

All water produced at our Desalination Plants is treated and re-mineralised. The product water is analysed for chemical content and bacterial purity to ensure that it complies with the provisions of the Gibraltar Public Health Act, which incorporates the EU Directive 98/83 of 3rd November 1998 regulating the quality of water to be used for dietetic purposes. The treated water is then pumped from the Plant to the Waterworks where it is either directed to the service reservoirs or to the storage reservoirs.

AquaGib - Water Analysis in GibraltarWhen a storage reservoir is full, the water is again analysed for chemical content and bacterial purity. Once the water is found to comply with our high standards it is placed in reserve storage until it is pumped to the service reservoirs. In order to ensure the bacteriological quality of the water remains within the required standard, the product water receives residual chlorination as it leaves the plant and also on transfer from storage to service reservoirs.

Gibraltar’s water distribution system is divided into districts, supplied with water from the service reservoirs. The water arriving at each district is sampled regularly and analysed to ensure that, when it reaches the consumer, it is still wholesome and complies with EU Directives. Further independent checks are carried out by the Environmental Health Department.

Analysis Results

Check Analysis

Audit Analysis

Your analysis and what it all means

Standards are in accordance with the Public Health Water Rules 1994. This includes the requirements of European Directive 98/83/EC.

The Test

& What It Means

Standard

Units

 

Microbiological Parameters

     

E. Coli

Groups of bacteria indicating possible faecal contamination of water supplies. Occurrence of these organisms is always immediately investigated.

0

per 100 ml

Enterococci

Groups of bacteria indicating possible faecal contamination of water supplies. Occurrence of these organisms is always immediately investigated.

0

per 100 ml

 

Chemical Parameters

     

Antimony

Antimony is toxic and is not present in water sources. Trace concentrations in drinking, water, which are not of any significance to health, can be derived from brass fittings and joint solders.

5

µgSb/l

Arsenic

 

Very low levels appear naturally.

10

µgAs/l

Benzene

Can be introduced into water by industrial effluents and industrial pollution.

1

µg/l

Benzo (a) pyrene (Benzo 3,4 pyrene)

This is a PAH, as it is recognised as being of a greater health significance it has an additional specific standard.

1

µg/l

Boron

Occurs naturally.

1

mgB/l

Bromate

Can be formed in the disinfection process of water.

10

µgBrO3/l

Cadmium

Very low levels appear naturally.

5

µgCd/l

Chromium

Very low levels appear naturally.

50

µgCr/l

Copper

Presence is largely due to influence of domestic plumbing systems.

2

mgCu/l

 

Cyanide

Very low levels appear naturally.

50

µgCN/l

1,2 Dichloroethane

Can enter surface water from industrial effluents related to chemical industries.

3

µg/l

Epichlorohydrin

Used in industry in the manufacture of glycerol, unmodified epoxy resins and water treatment resins.

0.1

µg/l

Fluoride

Occurs naturally.

1.5

mg/l

Lead

Presence is largely due to influence of domestic plumbing systems. Mains water contain little or no lead.

10

µgPb/l

Mercury

Very low levels appear naturally.

1

µgHg/l

Nickel

Presence is largely derived from protective coatings on taps and fittings.

20

µgNi/l

Nitrate

Occurs naturally from both mineral or soil processes and from agricultural activity.

50

mgNO3 /l

Nitrite

May be associated with ammonia or nitrate in river water.

0.5

MgNO2/l

Pesticides

Many water sources contain traces of pesticide residues as a result of agricultural and non agricultural use of pesticides on crops.

0.1

µg/l

Pesticides Total

This is the sum of all the individual pesticides detected in any one sampling occasion.

0.5

µg/l

Polycyclic Aromatic Hydrocarbons (PAH)

PAHs are associated with fossil fuels, if found in mains water they often originate from coal tar linings in old mains.

0.1

µg/l

Selenium

This is an essential trace element. Foodstuffs such as cereal, meat and fish are the principle source in the general population.

10

µg/l

Tetrachloroethene and Trichloroethene

Chlorinated solvents, which are used in industry and in dry cleaning processes. They are widespread in the environment and are found in trace amounts in water.

Combined Standard of 10

 

µg/l

Trihalomethanes Total (THMs)

Formed when chlorine is added to water as a disinfectant and reacts with organic substances.

100

µg/l

Vinyl Chloride

May occur in migration from UPVC pipes. Controlled by product formulation.

0.5

µg/l

 

Indicator Parameters

     

Aluminium

Is naturally present in most water sources.

200

µg/l

Ammonium

Is naturally present in most water sources.

0.5

mg/l as NH4

Chloride

In association with sodium it occurs naturally in water resources. Very high levels are present in seawater and are removed by treatment through desalination.

250

mg/l

 

Colour

Occurs naturally in water.

Acceptable to consumers and no abnormal change.

 

Conductivity

A measure of the dissolved mineral content of the water

2500

µS cm-1

Hydrogen ion concentration (pH)

Is controlled at treatment works to prevent corrosion of pipes and fittings.

≥ 6.5, and ≤ 9.5

 

pH units

Iron

Occurs naturally. Some mains are made from cast iron and may corrode with time to give the water a rust coloured appearance, which while undesirable is not a health hazard.

200

µg/l

Manganese

Naturally occurring as a result of passage of water through ground.

50

µg/l

Odour

As well as chemical tests we compare the sample with one, which is free of smell.

Acceptable to consumers and no abnormal change.

 

Oxidisability

Provides a measure of the organic content. This is an alternative measure to TOC

5

mg/l

Sulphate

Naturally occurring as a result of passage of water through ground.

250

mg/l

Sodium

Naturally occurring as a result of passage of water through ground.

200

mg/l

Taste

As well as chemical tests we compare the sample with one, which is free of smell.

Acceptable to consumers and no abnormal change.

 

Coliform

This bacteria indicates that the water may be contaminated. In most cases this is from the tap itself and may be present due to normal domestic use. We recommend that taps including the inside of the spout be regularly cleaned. Occurrence of the organism is always immediately investigated.

0

Per 100 ml

Total Organic Carbon

Provides a measure of the organic content. The concentrations present in water do not present any risk to health.

No abnormal change

 

Turbidity

This is the clarity of the water, which can be affected by minute air bubbles or finely suspended particles. If you allow a glass of water to stand for a few minutes it will normally clear.

Acceptable to consumers and no abnormal change.

 

 

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AquaGib Ltd

Suite 10b Leanse Place,50 Town Range,Gibraltar.

24 Hour Fault Reports: 

+350 200 73659

Customer Services:

+350 200 41288