Water for Human Consumption Directive - Quality Criteria

EU. Quality Criteria for Water for Human Consumption, Directive 98/83/EC, as amended by Directive 2015/1787/EU, 27 October 2015

This list contains the Annex I parameters from the Drinking Water Directive 98/83/EC, which concerns the quality of water intended for human consumption. Its objective is to protect human health from adverse effects of any contamination of water intended for human consumption by ensuring that it is wholesome and clean.

Total trihalomethanes (THM)

EC / List no: - CAS no: -
Application Name
Drinking water
Maximum Threshold
100 µg/l
B Part B - Chemical parameters
Sum of concentrations of chloroform, bromoform, dibromochloromethane, bromodichloromethane; The parametric value for total THMs from five years after the entry into force of this Directive until 10 years after its entry into force is 150 μg/l
Where possible, without compromising disinfection, Member States should strive for a lower value; For the water referred to in Article 6(1)(a), (b) and (d), the value must be met, at the latest, 10 calendar years after the entry into force of this Directive; Member States must ensure that all appropriate measures are taken to reduce the concentration of THMs in water intended for human consumption as much as possible during the period needed to achieve compliance with the parametric value; When implementing the measures to achieve this value, Member States must progressively give priority to those areas where THM concentrations in water intended for human consumption are highest