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Istan

2 water networks · Costa del Sol, Málaga

9.6
Overall / 10
🛡️
Safety
10
All bacteria, chemicals, and regulated substances
💎
Hardness
9.1
Mineral content — affects limescale, taste, appliances
👅
Taste & Comfort
9.4
pH, chlorine, clarity, odour, and colour

About the water supply in Istan

Istan's tap water is certified safe to drink, with an overall quality score of 9.6/10. The main concern is low free chlorine levels in one of the two networks, which may affect taste and comfort. Hardness levels are also on the higher side, but this is consistent across both networks. Overall, residents can enjoy safe drinking water, though some may notice differences in taste and appliance performance.

How to read these scores: 10 = perfect, 0 = at or over the legal limit. A score of 0 does not necessarily mean the water is unsafe — it means that specific parameter is at its maximum legal level. The official SINAC certification (APTA / NO APTA) is the authoritative safety indicator. Only readings from the last year are included — older data is excluded to keep scores current.

⚠ Parameters scoring below 8 — explained

👅 Chlorine taste/smell
Category: Taste · Legal limit: 0.2–1.0 mg/L required
2/10 Needs attention
0.9 mg/L. Chlorine is legally required (minimum 0.2 mg/L) to keep water safe as it travels through pipes. High chlorine level — a noticeable taste and smell. Letting water stand in an open glass for a few minutes will reduce it.
Network: RED ISTAN · Value: 0.9 · Date: 09/07/2026 09:40
💎 Water hardness
Category: Hardness · Legal limit: no legal limit
6/10 Fair
215 mg/L CaCO3 — classified as hard. Hard water — expect noticeable limescale on appliances, kettles and taps. Soap may not lather as well. Not a health concern. There is no legal limit for hardness as it poses no health risk.
Affected networks
Network Score Value Date
RED ISTAN 6/10 215 28/04/2026 11:05
RED ISTAN DISEMINADOS-URBANIZACIONES 6/10 224 18/05/2026 10:20

Water networks breakdown

Network Score 🛡️ Safety 💎 Hardness 👅 Taste & Comfort Last tested
RED ISTAN 9.5
–
RED ISTAN DISEMINADOS-URBANIZACIONES 9.6
–

Related articles

Is tap water safe to drink?
Guide for tourists, expats and residents
Hard water guide
Limescale, appliances and solutions
Chlorine in tap water
Why it tastes different and how to fix it