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Drinking Water PowerPoint PPT Presentation


Drinking Water. Lecture. Undergraduate Study – General Medicine. Assoc. Prof. Zdenek Fiala , Ph.D. Department of Hygiene and Preventive Medicine Charles University, Faculty of Medicine, Hradec Kralove. General sources of Water. Glacial water. Sea water. Surface water. Groundwater.

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Drinking Water

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Drinking Water

Lecture

Undergraduate Study – General Medicine

Assoc. Prof. Zdenek Fiala, Ph.D.

Department of Hygiene and Preventive Medicine

Charles University, Faculty of Medicine, Hradec Kralove


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General

sources

of Water

Glacial

water

Sea

water

Surface

water

Groundwater


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Water supply

to population

Public water

systems

Treated water

Chemicals/Byproducts

Strict output control

Transportation/contamination

Large number of people

Water wells

Bottled

water

Untreated water

Natural contamination

Irregular/weak control

Limited number of people

Untreated/treated water

Without chlorination (O3, UV)

Strict output control

Storage conditions/contamination

Large number of people


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Absence of the pathogen

micro-organisms and the viruses

(Enterovirusis, Hepatitis-A)

Water quality

(cold/hot water)

WHO

Microscopic organisms

within the permitted limits

Chemical contamination

within the permitted limits

Physical indicators

within the permitted limits

Recommended content

of minerals

and trace elements

Radioactive contamination

within the permitted limits

(radon, α/β-radioactivity

http://www.who.int/entity/water_sanitation_health/dwq/en


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Pathogens and microscopic organisms(examples)

CFU= Colony-Forming Unit

LV = Limiting Value = upper limit of acceptable values (not acute)

HLV = Highest Limiting Value = excludes water as drinking water (acute)


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Chemical substances and physical factors (examples)

LV = Limiting Value = upper limit of acceptable values (not acute)

HLV = Highest Limiting Value = excludes water as drinking water (acute)


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Minerals and trace elements(examples)

HLV = Highest Limiting Value = excludes water as drinking water (acute)

LV = Limiting Value = lower limit of acceptable values

RV = recommended value


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Water analyses

Full analysis

(72 indicators)

Escherichia coli, Clostridium prfringens,

Pseudomonas aeruginosa,

Microscopic picture (dead/living organisms)

Ammonium, Nitrates, Nitrites, Aluminium,

Chlorine (free), Manganese, pH, Iron

Limited

analysis


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Frequency of analyses of drinking water (examples)


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Glass, Polyethylene,

Polycarbonate

Baby water

Table (spring)

water

Bottled

water

Drinking water

Natural mineral

water

Natural medicinal

water


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Baby water

Groundwater without treatment

Mineralization < 1 g/L

Nitrates < 15 mg/L

UV bacterial decontamination

Best quality

for lifelong use

Table (spring) water

Groundwater

Physical treatment allowed

Mineralization < 1 g/L

Nitrates < 25 mg/L

UV bacterial decontamination


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Drinking water

Groundwater, surface water

Chemical/physical treatment

Mineralization < 1 g/L

Nitrates < 50 mg/L

UV bacterial decontamination

For lifelong use

Average

quality

Soda water

Saturated Drinking water (CO2)

UV bacterial decontamination

For casual use


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Natural mineral

water

Groundwater without treatment

Mineralization < 6 g/L

Without strong medicinal effect

UV bacterial decontamination

For casual use (0.5 L)

Best quality

for casual use

Natural medicinal water

Groundwater withou treatment

Mineralization > 6 g/L

With strong medicinal effect

UV bacterial decontamination

For casual use with medical control !


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Recommendation for babies

Baby water or table (spring) water

Without carbon dioxide

Nitrates <15 mg/L

Sodium < 15 mg/L

Recommendation for bottled water

Calcium40 – 80 mg/L

Magnesium20 – 30 mg/L

Potassium1 – 5 mg/L

Sodium< 20 mg/L

Nitrates< 15 mg/L

Sulphates< 240 mg/L

Chlorides< 25 mg/L


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