Chlorine originates from natural springs, mud, industrial effluents and urban waster waters. Its concentrations on higher level, then concentration in near waters indicate on some pollution (usually concentration below 10 mg/l). Higher concentrations occur in surface waters, because of road treatments in the winter.
Origin in water
Chlorine is abroad prevalent in underground waters, especially in deeper water-bearings, where appearance of this ion is connecting with seawater. The main sources in underground water are good soluble chlorine compounds, which are not very present in the Earth. This ion connects for metamorphic and igneous rocks, but also for some sedimentary rocks. Certain quantities of this ion can be volcanic origin, and also originates as decay product of living world.
This ion has an important part in keeping of acid-base balance. With sodium this element assists in control of osmotic pressure. Chlorine is component of liquid of gastrointestinal channel (acid in belly).
Chlorine regulates acid-base balance in blood. With sodium and potassium, chlorine reacts as compound. It helps in cleaning waste materials in organism, because this ion eases the liver function. Daily needs for chlorine in daily nutrition are not specified, but if you use enough quantities of salt, you have enough chlorine in your organism. It also foments digestion and helps you to stay flexible.
High loading chlorines can bring to specific dysfunction in organism.
Maximal allowable concentrations
According to recommendations of EU, chlorine has not direction as parameter for attention (Directive 98/83/EC). According to our rules for drinking water (Sl. list SRJ 42/98) limitary value for chlorine is 200 mg/1. Border of respectable taste in drinking water is 250 mg/l.
In direction of European Economic Community 80/777/EEC is prescription that in case if chlorine concentration in bottled natural mineral waters is bigger then 200 mg/l, that water must declare as chlorines water. These criteria accept in domestic rules (Sl list SCG 53/05). Extra limits for chlorines content in bottled waters do not special signify.