HomeArrange and applyWater taxesWater board tax assessmentWater board tax assessment Types of water taxWe distinguish four types of water taxes. Who gets a tax assessment when?Users receive an assessment at the end of January, owners from the end of April RatesHow much tax you have to pay depends in part on whether you are a tenant or owner. Water tax ordinancesHere are the ordinances we use for water taxes. My Government message boxWould you like to receive the assessment digitally only? Then sign up for the message box. PremisesMailbox BusinessDid you know that the revamped Berichtenbox Zakelijk (formerly Berichtenbox for businesses) will become the communication channel between the Water Board and business owners in the region from 2025? Water tax business premisesYou pay treatment or pollution charges if you discharge wastewater from a business premises. Digital declaration user business premisesCompanies with water consumption of more than 217 m³ can receive a request for declaration. Source extraction, remediation, metering companiesIf you discharge or dispose of wastewater from a property, you will receive a business premises assessment. Or are you looking forIndividual Treatment of Wastewater (IBA).An IBA is a system that treats wastewater and then discharges it to surface water. Paying in installments by direct debitWould you like to pay the assessment in installments? You can do this with a direct debit authorization.