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Laboratory work number 2 “ Drinking water quality in Latvia”

Laboratory work number 2 “ Drinking water quality in Latvia”. Authors: Lauris, Monta, Lelde, Alise Mazsalaca Secondary School Form 9 and 10 Latvia. We used:. Well water; Spring water; Tap water; Valmiera’s tablewater; “VENDEN” drinking water. Agenda. We defined:

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Laboratory work number 2 “ Drinking water quality in Latvia”

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  1. Laboratory work number 2“ Drinking water quality in Latvia” Authors:Lauris, Monta, Lelde, Alise Mazsalaca Secondary School Form 9 and 10 Latvia

  2. We used: • Well water; • Spring water; • Tap water; • Valmiera’s tablewater; • “VENDEN” drinking water.

  3. Agenda We defined: • pH and total amount of alkaline • Total hardness • NO2-, NO3-, Cl- • SO42-, PO43- • Fe2+, Fe3+, NH4+

  4. pH and total amount of alkalinewater analysis Standard: 6,5-9,5 pH units

  5. Total hardnesswater analysis

  6. Nitrate and nitrite ionswater analysis Standard: Nitrite conten can’t exceed 0,10 mg/l in the water, if nitrate (mg/l)/50

  7. Chloride ionwater analysis Standard: 250 mg/l

  8. Sulphate ionwater analysis Standard: 250 mg/l

  9. Iron ionswater analysis Standard: 0,2 mg/l

  10. Ammonium ionwater analysis Standard: 0,50 mg/l

  11. Conclusions about quality of drinking waters in Latvia • Drinking water that is taken from natural extractive objects contains anions in admissible norms (none of water patterns contain phosphate ion). • In our area the water of wells and boreholes contains megascopic amount of iron, because there is limonite (red iron oxide ore) and hematite (brown iron oxide ore) in the ground rocks. • There is a chloride ion in Valmiera’s tablewater and “Venden” drinking water (possibly it is because of using natrium and calcium chlorid in the process of mineralization).

  12. Mazsalaca town implements a project on developing the water management system. • There will be a united water supply system. • There will be a united waste water system. • We hope that water will be qualitative, that means, soft and will contain cation and anion in small amounts.

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