Water quality standards
Drinking water standards by jurisdiction, with legal status always stated.
The international reference framework from which most national drinking water standards derive. It sets health-based guideline values and, more importantly, establishes the water safety pl…
The recast directive that governs drinking water quality across the EU. It introduced a risk-based approach across the supply chain, tightened the lead limit, and added parametric values f…
Federally enforceable US drinking water standards, expressed as maximum contaminant levels or as treatment technique requirements where measurement is impractical.
The statutory drinking water quality standards for the UK, enforced by the DWI in England and Wales and the DWQR in Scotland. Compliance is assessed per water supply zone.
Federal guidance setting maximum acceptable concentrations, which provinces and territories then adopt into enforceable regulation. Enforceability is therefore provincial, not federal.
National guidance applied through state and territory regulation, structured around a preventive risk management framework rather than end-point compliance alone.