Clean, tasty and unpolluted water we expected to find when we encounter a well ready to quench a traveler's thirst. Drilled wells and wells are often the main source of water in many households. The water from the well, in order to be used as drinking water, must correspond qualitatively to the legislation in force, respectively to comply with the maximum allowed values provided in the Drinking Water Law.
The quality of water in wells is influenced by soil structure and various sources of pollution. Excessive use of fertilizer for fertilization and rain-washed agricultural soils (especially in winter), or the presence of strong storms, can be an important source of nitrate contamination for surface waters. The natural concentration of nitrates in groundwater is normally less than 10mg / l. The discharge of wastewater on the ground is another common cause of contamination of the groundwater and wells.
Even the natural structure of the soil can determine the inability of water. Sometime, the analyzes showed increases in the concentration of ammonia in the soil above the permissible limit of 0.5 mg / liter, without the presence of a source of organic pollution.
A few rules can ensure healthy water in the household that uses well water as drinking water:
Monitoring the quality of water in family wells is necessary to ensure the health of the inhabitants served. Ioan POP, the manager of the environmental protection division of WESSLING Romania, recommends a set of analyzes after drilling, before the well is put into use for the first time, to confirm the potability of the water. Testing of water from own sources (wells or boreholes), or sources for public use (wells and springs) should be performed at least once a year to verify compliance with physicochemical and microbiological parameters, in an accredited laboratory and in accordance with the law. in force.
We recommend testing by specific laboratory tests with accredited methods and not by certain test kits whose uncertainty is very high. The influence of the geological characteristics of the area is determined in the laboratory and it is ascertained whether it falls within the limits provided by law.
Thus, a financial investment in a package of analyzes to determine the quality of water to be used in the household becomes insignificant compared to the damage to health through its untested use.
1. Physico-chemical parameters 2. Microbiological parameters
• pH • Escherichia coli (E. coli)
• Electrical conductivity • Enterococci
• Turbidity • Number of colonies at 22°C and 37°C
• Total hardness • Coliform bacteria
• Permanganate index (oxidizability)
• Nitrates and Nitrites