Chemical Elements: Periodic Table for Water | Watermart
Interactive reference
Explore all 118 elements
Choose an element for facts, its chemical forms in water, process implications and trusted sources.
Scroll sideways to explore the table on smaller screens.
Water Is More Than H₂O
Chemical elements in water normally occur as ions, dissolved compounds, gases, or particles—not as free atoms. Chemical form, concentration, pH, and oxidation conditions determine their effects on colour, taste, scale, corrosion, health, and the treatment processes that should be evaluated.
The periodic table contains elements, while water is a compound of hydrogen and oxygen. Sodium can occur as Na⁺, chlorine mainly as chloride or disinfectant species, and carbon as carbon dioxide, bicarbonate, or organic matter. That form—not merely the element’s name—controls solubility, risk, analytical method, and treatment choice.
Updated 30 July 2026: the links between chemical elements, water-test parameters, and process selection were clarified.
Use this library to follow the questions that make water chemistry come alive:
- Why can well water turn orange? Start with iron and manganese.
- Why does white scale appear on heaters or membranes? Follow calcium, magnesium and silicon.
- How do chlorine, chloride and disinfection by-products differ? Compare chlorine, bromine and iodine.
- Which elements connect fertiliser, algae and biological treatment? Explore nitrogen and phosphorus.
- Why do radioactive elements require a different approach? Read uranium, radium and radon.
- What connects batteries with industrial wastewater? Start with lithium, cobalt, nickel and the lanthanides.
Each page supports two reading modes: a quick answer for someone solving a water problem and a deeper layer for anyone curious about the element’s properties, story and context. Source links are included so important data can be checked.
From Chemical Elements to Water-Treatment Choices
Start with the symptom and test result, then establish the chemical form that needs confirmation. An element name alone does not prove the source of a problem or select one piece of equipment; concentration, pH, alkalinity, competing ions, flow, treated-water target, and representative testing define the process.
| Buyer question | Elements and evidence to check | Product path that may be evaluated |
|---|---|---|
| Well water is orange, stains surfaces, or leaves deposits | Dissolved/total iron and manganese, pH, oxidation, turbidity, and peak flow | Iron and manganese filter media after oxidation and backwash requirements are calculated |
| White scale forms on pipes, heaters, or membranes | Calcium, magnesium, alkalinity, pH, silica, and temperature | Pentair HydraSmart softening when test results and hardness load support ion exchange |
| TDS, salinity, or dissolved ions must be reduced | Full ion analysis, TDS/conductivity, temperature, permeate target, and recovery | FilmTec brackish-water RO membranes as one option after a design projection |
| A specific ion needs separation or polishing | Ionic species, concentration, competing ions, capacity, and quality target | DIONIX ion exchange resin when selectivity and regeneration duty fit |
| Disinfectant or pH-adjustment chemical needs injection | Chemical, active dose, solution strength, flow, pressure, and wetted materials | Water-treatment dosing pumps after the chemical programme and pump duty are established |
Start with Elements Most Relevant to Water
- Iron and manganese: colour, staining, deposits and filtration after oxidation.
- Calcium and magnesium: hardness and scale risk.
- Silicon and boron: major boiler and reverse-osmosis challenges.
- Arsenic, chromium, lead and mercury: speciation, risk and process selection must be based on laboratory analysis.
- Chlorine, bromine and iodine: disinfection, halide ions and disinfection by-products.
An element name alone is not enough to select equipment. Chemical form, concentration, pH, alkalinity, competing ions and the product-water target must be evaluated together. Contact Watermart with the water-analysis results to discuss additional testing and process options.
Questions about Chemical Elements in Water
Does detecting an element mean the water is hazardous?
No. The meaning depends on the element, chemical form, concentration, intended use, sampling method, and applicable limit. Interpret the laboratory result in the context of the water source rather than inferring risk from the element name alone.
Can the periodic table tell me which filter to buy?
No. It helps explain relationships among elements, but filter selection needs water-test results, speciation where relevant, flow, operating conditions, the quality target, backwash or regeneration requirements, and commissioning evidence.
What information should I send for a treatment review?
Provide results from a representative sample, source type and location, water use, normal and peak flow, treated-water target, observed symptoms, and existing-system data. Drinking-water applications still require sanitation, consumables records, sampling, and laboratory verification against applicable Indonesian requirements.
Primary References
This material is educational. Water-quality assessment and process selection must follow laboratory results, intended water use and applicable requirements.