Understanding your Water Report
It is important to note that the results from your water analysis are from a singular point in time and can fluctuate over time. For this reason when sizing a water treatment system it should not be operated at its absolute limits. We will also advise you on some best practices to ensure the longevity of both your equipment and resin (if applicable).
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The European Union (Drinking Water) Regulations 2014 (S.I. 122 of 2014) have been replaced by the European Union (Drinking Water) Regulations 2023 (SI99 of 2023), this has been converted into an Irish Statute that governs minimum water quality parameters for consumption.
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If any of your water parameters exceed what is listed then treatment should be carried out to ensure the water is of a suitable standard for consumption.
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Note for conversions:
1000μg/l = 1mg/l = 1ppm
1μg/l = 1ppb
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*Turbidity does not have a particular limit for private supplies but generally if the value is above 4.0 it should be treated, the norm is to treat to a maximum of 1.0.
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From January 2026 there will be a new requirement to test for Bisphenol A, Chlorate, Chlorite, Haloacetic Acids, Microcystin-LR, PFAS Total, Sum of PFAS and Uranium.
Parameter | EU Limits | Units |
|---|---|---|
pH | 6.5 - 9.5 | - |
Colour | Acceptable to Consumers | - |
Turbidity | 10 | NTU |
Conductivity | 2500 | uS/cm |
Hardness | - | - |
Alkalinity | - | - |
Total Iron | 0.2 | mg/l |
Manganese | 0.05 | mg/l |
Nitrates | 50 | mg/l |
Nitrite | 0.5 | mg/l |
Total Dissolved Solids | - | mg/l |
Copper | 2 | mg/l |
Ammonium | 0.3 | mg/l |
Aluminium | 200 | ug/l |
Chloride | 250 | mg/l |
Sodium | 200 | mg/l |
Langelier Index | -0.5 - 0.5 | LSI |
Arsenic | 10 | ug/l |
Sulphate | 0.5 | mg/l |
TDS Measurement
Total dissolved solids (TDS) is the total amount of solids dissolved in the water. The most common and quick way to obtain a reading of this parameter is via a measurement of conductivity which is then correlated to TDS via a constant. TDS / Conductivity itself is not a key indicator of water quality but it is an excellent parameter to understand a filter systems performance.
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TDS / Conductivity is an indicator of the total amount of dissolved salts / minerals in a water sample, for example rainwater has low conductivity, high mineral content spring water will have high relative conductivity.
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TDS Uses:
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For reverse osmosis units we know post RO membrane/element the value should be around 50 ppm or 25 μS/cm.
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After remineralisation (if applicable to the particular system) we know the value will increase significantly, you can take a baseline of a new mineralisation cartridge value and see its depletion as the ppm reading gets lower over time.
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For very pure water applications i.e. autoclaves, window washing etc. a very low TDS / Conductivity value is required, typically a deionising section is added to bring TDS / Conductivity to almost 0 ppm or less than 1 μS/cm. Deionising media is then typically changed once it becomes depleted and the TDS value begins to rise.
Existing and new Installations
For replacements cartridges and parts for existing installations just contact us and we will quickly let you know everything required.
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For new installations we can talk you through a complete installation. The best place to start is to have a water test done to see what type of water treatment you need. Contact us and we can put you in touch with our testing partner. Please note we do not offer an installation service.