+421 903 218 422
info.sk@alsglobal.com
+421 903 218 422
info.sk@alsglobal.com
Our laboratory is accredited by SNAS (Slovak National Accreditation Service) according to ISO / IEC 17025: 2005 for microbiological, biological and physico-chemical parameters in drinking water. We will analyze drinking water in accordance with the requirements of Government Regulation. 354/2006 Z.z. laying down requirements for water intended for human consumption and quality control of water intended for human consumption (as no. 8/2016 and 496/2010 Z.z. Z.z.)
Table. 2 Minimum range of drinking water
| A. Microbiological and biological indicators | ||||||
|---|---|---|---|---|---|---|
| No. | Indicator | Symbol | Limit | Unit | Limit Type | Notes |
| 1 | Escherichia coli | EC | 0 | cfu / 10ml | NMH | IZ |
| 2 | Coliform bacteria | CB | 0 | cfu / 10ml | MH | IZ |
| 3 | Enterococci (faecal streptococci) | E | 0 | cfu / 10ml | NMH | IZ |
| 4 | Culturable microorganisms at 22 ° C | CM22 | 500 | cfu / 1ml | MH | IZ |
| 5 | Culturable microorganisms at 36 ° C | CM36 | 100 | cfu / 1ml | MH | IZ |
| 6 | Coluorless flagellates | CF | 50 | individuals/ml | MH | Fior disinfected water the limit is 0 IZ |
| 7 | Living organisms (except colorless flagellates) | LO | 0 | individuals/ml | MH | IZ |
| 8 | Filamentous bacteria (other than iron and manganese bacteria) | FB | 0 | individuals/ml | IH | IZ |
| 9 | Iron and manganese bacteria | IMB | 10 | coverage in % | MH | IZ |
| 10 | Micromycets | MM | 0 | individuals/ml | IH | IZ |
| 11 | Dead Organisms | DO | 30 | individuals/ml | MH | |
| 12 | Abioseston | AB | 10 | Coverage in % | MH | IZ |
| 13 | Clostridium perfringens | CP | 0 | cfu / 100ml | IH | It applies to drinking water, surface water or groundwater affected by surface water. If the indicator value is not complied with, it checks whether there is a danger to human health due to the presence of microorganisms, for example. cryptosporidia. |
| B. Physical and Chemical Indicators a) Inorganic Indicators |
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|---|---|---|---|---|---|---|
| No. | Indicator | Symbol | Limit | Unit | Limit Type | Notes |
| 14 | Nitrates | NO3- | 50 | mg/l | MH | The sum of the detected ratios of nitrate divided by 50, the nitrate content divided by 3 must be less than or be equal to 1. The nitrite content in drinking water at the outlet of the treatment plant has to be below 0.1 mg / l. |
| 15 | Nitrites | NO2- | 50 | mg/l | NMH | The sum of the detected ratios of nitrite divided by 50, the nitrite content divided by 3 must be less than or be equal to 1. The nitrite content in drinking water at the outlet of the treatment plant has to be below 0.1 mg / l. |
| B. Physical and Chemical Indicators c) Disinfectants and their By-products |
||||||
|---|---|---|---|---|---|---|
| No. | Indicator | Symbol | Limit | Unit | Limit Type | Notes |
| 16 | Free Chlorine | Cl- | 0,3 | mg/l | MH | This refers to the content of free chlorine from water treatment. If the water is disinfected with chlorine, the minimum value is 0.05 mg / L. |
| B. Physical and Indicators d) Characteristics which can adversely affect the sensory quality of the drinking water |
||||||
|---|---|---|---|---|---|---|
| No. | Indicator | Symbol | Limit | Unit | Limit Type | Notes |
| 17 | Absorbance (254 nm, 1 cm) | A254 | 0,08 | IH | Exceeding the indicator value may be the reason for detecting chloroform. | |
| 18 | Ammonium | NH4+ | 0,5 | mg/l | MH | |
| 19 | Colour | C | 20 | mg/l | MH | |
| 20 | Aluminium | AI | 0,2 | mg/l | MH | |
| 21 | Chemical Oxygen Demand | COD | 3,0 | mg/l | MH | |
| 22 | Manganese | Mn | 0,05 | mg/l | MH | The excess of the limit value is onlu acceptable only in the case of manganese from the geological structure and if there is no interference with the sensory properties of the water. |
| 23 | pH | pH | 6,5 - 9,5 | MH | Water must not be reactive. In the case of packaged drinking water that is naturally rich in carbon dioxide, the minimum value may be lower. | |
| 24 | Taste | Acceptable for the consumer | MH | Determination of the threshold odor number (TON) and threshold flavor number (TFN) according to Slovak technical standard STN EN 1622. | ||
| 25 | Temperature | t | 8 - 12 | °C | OH | |
| B. Physical and Chemical Indicators d) Indicators that may adversely affect the sensory quality of drinking water |
||||||
|---|---|---|---|---|---|---|
| No | Indicator | Symbol | Limit | Unit | Limit Type | Notes |
| 26 | Turbidity | T | 5 | FNU | MH | Limit value of 1.0 FNU at the outlet of the water treatment plant. |
| 27 | Odour | Odourless | Determination of the threshold odor number (TON) and threshold flavor number (TFN) according to Slovak technical standard STN EN 1622. | |||
| 28 | Iron | Fe | 0,2 | mg/l | MH | Exceeding the limit value and 0.50 mg / l is only acceptable if the iron is from the geological subsoil and there is no interference on the sensory properties of the water. |
| 29 | Conductivity | kappa | 125,0 | mS/m at 20°C | IH | |
In Annex. 1 Government Regulation no. 354/2006, the limit values are distinguished:
Coliforms / E. coli / Enterococci (fecal bacteria)
Coliform bacteria, E. coli and enterococci are bacteria parameters. Coliforms are a group of bacteria with E. coli being a member of that group. The presence of E. coli or enterococci in drinking water indicates that the water was contaminated with human feces or a disinfection system is not working properly.
All the above listed microbiological parameters should not be present in drinking water. Their occurrence in drinking water may cause digestive problems. Water containing fecal bacteria should be boiled before use and well disinfected, including water pipes.
pH
Acidity / alkalinity of the water with a scale of 0-14, where 7 is neutral water. Lower pH (<6.5) can result in corrosion of pipes and a green/blue coating on tiles.
Total Hardness
Hardness generally means the sum of calcium and magnesium in water. Hard water is generally not harmful to human health. The recommended value for drinking water - calcium and magnesium is 1.1 to 5 mmol l. Problems occur when the hardness exceeds 5.35 mmol/L as limescale forms.
Nitrate / Nitrite / Ammonium
Nitrate / Nitrite / Ammonium ions in the environment can be from a number of sources, mainly from fertilizers and sewage. The limit for nitrate in drinking water is 50 mg/L. For small children the recommended maximum value is 10 mg/l. In the human body, nitrates are converted into nitrites, which are very dangerous for young children.
Iron
Iron is a metal that occurs in soils. Water with increased content of iron may look clean, but the water will be orange/red after exposure to sunlight. The increased iron content in water is an insignificant health indicator, but it adversely affects the sensory properties of water, causes a rusty colour and bitter taste. Even small concentrations in water can cause the development of iron bacteria that clog pipes and cause odour.
The limit for iron content in drinking water is 0.2 mg / l. Exceeding the limit value 0.5 mg/l is only acceptable if iron is from the geological subsoil.
Manganese
Manganese is a metal that is commonly found in soil and rocks. If the amount exceeds 50 g/l, the water has an undesirable taste and can discolour laundry. Manganese is essentially non-toxic and mostly causes problems due to the undesirable taste.
Exceeding the limit value of 0.20 mg/l is only acceptable if manganese is from the geological structure and if there is no interference of the sensory properties of water.
Conductivity
Conductivity is influenced by dissolved inorganic substances - anions and cations. Anions are mainly chlorides, nitrates and sulfates. Cations are mainly magnesium, calcium, iron and aluminum.
Pay the Fee for your test. All major credit and debit cards accepted. We will despatch the sample bottles the same day.
Bottles can be dropped off at any of our sites or you can return by post. To view a list of drop off points, please click here.
Certificate of Analysis will be issued to you within 10 working days of receipt of your water bottles by the laboratory.
