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Ch.3. Water Quality  What is WQ? Physical, chemical, biological characteristics of water Appropriateness of water properties for a given usage purpose.

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Presentation on theme: "Ch.3. Water Quality  What is WQ? Physical, chemical, biological characteristics of water Appropriateness of water properties for a given usage purpose."— Presentation transcript:

1 Ch.3. Water Quality  What is WQ? Physical, chemical, biological characteristics of water Appropriateness of water properties for a given usage purpose  Water usage? Drinking Other household usage (shower, gardening, laundry, cooking, etc.) Agriculture Industry Leisure Others

2  WQ criteria: The levels of the constituents (including pollutants) and other parameters indicating the water quality. The criteria can be set For inorganic parameters: ○ Anionic components: F, Cl, SO4, NO3, PO4 ○ Cationic components: All the metals, including heavy metals such as Pb, Cd, As, Se, Hg, etc. ○ Neutral coponents: Si, O2 For organic parameters: TDS, color, COD etc. For (micro)biological parameters: Coliforms, Salmonella, Viruses etc. For pesticides: Diazinon, Parathion, etc. For radio nuclides: 226 Ra, 228 Ra, alpha particle activity etc.

3  WQ standards: Sets of recommended (maximum) levels of the criteria to secure the purpose of the water use Drinking water standards ○ WHO, USEPA, EU, ROK (see the Table on the next page) WHOUSEPAEU Surface water standards Groundwater standards ○ Groundwater quality standard of ROK Groundwater quality standard of ROK WQ standard for finfish WQ standard for paddy rice etc

4 From Drinking water standards of The Republic of Korea

5 From WQ standard for finfish (Australia)

6  Potential health effects from ingestion of water Inorganic ○ As: Skin damage; circulatory system problems; increased risk of cancer ○ Pb: Infants and children-delays in physical or mental development. Adults-kidney problems; high blood pressure From

7 From From Arsenic (As) poisoning

8 Image courtesy of Paul Traughber, M.D., Boise, Idaho. This X-ray shows white bands of lead collected in the growth plates of the knee joints of a child Lead (Pb) poisoning From

9 ○ Cd: ‘Itai-Itai’ disease, kidney damage From

10 ○ Hg: ‘Minamata’ disease, kidney damage From / Son With Birth Defects Due to Mercury Poisoning

11 ○ F: Bone disease (pain and tenderness of the bones); Children may get mottled teeth. Researchers say in some villages nearly all adults suffer skeletal fluorosis. China. From From

12 ○ NO 3, NO 2 : "Blue baby syndrome" in infants under six months - life threatening without immediate medical attention. Symptoms: Infant looks blue and has shortness of breath. From / Fingertips get swollen. Medically this is called as “Clubbing

13 From


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