Quality Mark for Materials in Contact with Drinking Water

Before the adoption of the Ministerial Decree No. 174/2004 in the Italian legislation relating to materials used in contact with drinking water resulted as follows: the LD. 31/2001 Implementation of Directive 98/83 / EC on the quality of water intended for human consumption is in fact flanked by Ministerial Decree of 21 March 1973Discipline hygiene of packaging, containers and utensils intended to come into contact with foodstuffs and subsequent updates , and Circular No. 102 of 02/12/1978 Discipline toilet on plastics, rubbers for pipes and accessories intended to come into contact with treated and untreated drinking water . Neither of the two was actually specific regulations for drinking water.

DM 174/2004 Concerning the materials and objects that can be used in stationary collection, treatment, supply and distribution of water intended for human consumption entered into force in 2007 and has governed the materials in contact with water intended for consumption human.

The highlights of the Ministerial Decree 174/2004 are:

  • Indication of positive lists for the composition of the materials;
  • Indication of the limits of global migration in water to appropriate contact conditions and specific migration limits for several elements and compounds (monomers, additives, fillers, soloranti, processing aids, etc.).
  • Obligation to ensure that no “unfavorable” alteration of the organoleptic characteristics of drinking water as defined by Legislative Decree. N. 31/2001 and the absence of unregulated disposal of toxic substances.


Metals and their alloys (for such materials, the suitability for use is subject to the composition and maximum content of impurities considered toxic as defined by Legislative Decree no. 31/2001):

  • Carbon Steel
  • Cast iron
  • Galvanized carbon steel
  • Stainless steel
  • Copper and copper alloys
  • Aluminum
  • Titanium and its alloys
  • Alloys for brazing

Materials based on hydraulic binders, porcelain enamels, ceramic and glass

  • Fibers (metallic, non-metallic, organic)
  • Additions (mineral, organic)
  • Porcelain enamels
  • Pottery
  • Glass


Rubbers (natural and synthetic)

The complete list of the materials allowed by the DM 174/2004 and its composition limits can be downloaded from the Documents section of the site TIFQ.