How do chemical impurities enter the water supply?

Through rock layers rich in minerals, leaching from old pipes, farm runoff carrying fertilizers and pesticides, and industrial discharge.

What are the differences between physical, chemical, and biological impurities in water?

Physical particles are visible like sand and rust. Chemicals are dissolved substances such as salts, fluoride, heavy metals and nitrates. Biological are living contaminants including bacteria, viruses and parasites.

Can hard water be considered an impurity?

Yes. Hardness from calcium and magnesium is not harmful but causes scaling, stains, and affects soap performance. Many households reduce hardness for better appliance life and taste.

How do heavy metals like lead and arsenic contaminate water?

They dissolve from natural mineral deposits or corroded plumbing. Old lead pipes or solder can leach lead, especially if water is acidic or sits stagnant for long periods.

Common Impurities Found in Water

faq1

faqsQuestions: Is drinking RO purified water without minerals safe for health?
faqsAnswer: For most people with a balanced diet, yes. Food supplies the bulk of essential minerals. Very low TDS water may taste flat. If you prefer a fuller taste, pick a model with a mineraliser or blending control. The priority remains safety and consistent quality.

faq2

faqsQuestions: How can you retain minerals in RO-purified water?
faqsAnswer: Choose a purifier that has a mineraliser cartridge or a TDS controller. These features add back minerals like calcium or blend a little raw water to raise TDS. Keep filters serviced so taste stays consistent and settings do not drift.

faq3

faqsQuestions: What is TDS, and how does it relate to minerals in water?
faqsAnswer: TDS stands for total dissolved solids. It measures the amount of dissolved ions in water, which includes salts and minerals. A moderate TDS often tastes better than either extreme. RO reduces TDS to a controlled level, and a mineraliser can raise it slightly.

faq4

faqsQuestions: Do all RO purifiers remove minerals, or are there exceptions?
faqsAnswer: The membrane will always lower dissolved ions. That is how RO works. The exception is not the membrane but the design around it. Units with TDS control or a mineraliser reintroduce minerals to the final water, thereby improving both taste and mineral balance.

faq5

faqsQuestions: Can an RO purifier with a mineraliser or TDS controller keep essential minerals?
faqsAnswer: Yes. The mineraliser adds a measured dose of calcium magnesium and potassium after filtration. A TDS controller blends a small amount of raw water with the RO stream. Both routes keep flavour nicely while the membrane still blocks harmful contaminants.

faq6

faqsQuestions: Why do RO purifiers remove both harmful contaminants and good minerals?
faqsAnswer: The pores do not recognise good or bad. They separate by size and charge. That means heavy metals, salts and minerals pass into the reject stream together. Designers solve this by adding post treatment to restore a pleasant mineral profile.

faq7

faqsQuestions: How does mineral removal affect the taste of RO purified water?
faqsAnswer: Lower TDS often tastes softer and cleaner, but some people find it flat. Adding a mineraliser or raising TDS slightly usually fixes that. Fresh filters and carbon polishing also help because they reduce chlorine and musty odours that mask flavour.

faq8

faqsQuestions: Which type of water purifier is best if you want to keep natural minerals in your water?
faqsAnswer: If your source water has low to moderate TDS and is already treated, a UF or UV unit retains the native minerals while removing microbes and particles. If you need RO for safety, pick a model with a mineraliser or TDS control to keep the balance and taste.