Tap water across Costa del Sol is sourced, treated and monitored by local operators against EU Drinking Water Directive limits. Data is drawn directly from SINAC — the Spanish Ministry of Health's official water quality database — and converted into three scores per municipality.
Safety (50%): bacteria, heavy metals and nitrates. Hardness (25%): dissolved minerals that affect appliances and taste. Taste & Comfort (25%): pH, chlorine, odour and clarity. Scores range from 0 to 10 and use only readings from the past 6 months.