What should I do with non-drinking water in Lavizzara?

You should avoid drinking, brushing your teeth or preparing cold foods with tap water in the affected fractions. Use bottled water or, if necessary, boil water for at least 5 minutes before each use. Check for updates on the website of the Municipality of Lavizzara or on its social media channels.

How do I boil tap water to make it safe?

To make tap water safe, fill it in a clean saucepan, bring to a full boil (about 100°C) and keep it boiling for at least 5 minutes with the lid closed. After boiling, let it cool down covered and you can use it for drinking, cooking or oral hygiene.

Which fractions of Lavizzara are affected by the warning of contaminated water?

The hamlets warned are Piano di Peccia, Sant'Antonio, San Carlo, Cortignelli and Veglia, all located in the Lavizzara valley. In these locations, the water of the aqueduct has been declared undrinkable due to the presence of coliforms and E. coli, so it is mandatory to boil it or use bottled water until further notice.

When will the water become drinkable in Lavizzara?

The authorities have indicated that the situation may last a few days, with the next official communication expected within 48 hours. Laboratory tests must confirm the removal of coliforms and E. coli; only then will the water return to the cantonal limits (0 CFU/100 ml) and be drinkable again.

Lavizzara: Non-Potable Water in Certain Areas (cross-border guide)

Di Valerie Linc · Published on 6 April 2026

The Lavizzara Municipality has declared the water from Piano di Peccia non suitable for drinking until further notice, affecting several hamlets in the valley.

Context

TL;DR

Acqua non potabile
Lavizzara colpita
Bollire acqua 5 min

Key facts

Dove: Lavizzara, Piano di Peccia, Sant'Antonio, San Carlo, Cortignelli, Veglia
Quando: 13 ottobre 2023
Cosa: Acqua non potabile a causa di problemi tecnici o ambientali
Soluzione: Bollire acqua per almeno 5 minuti
Autorità: Municipio di Lavizzara e autorità cantonali
Durata: Sarà comunicata entro 48 ore
Raccomandazioni: Usare acqua in bottiglia o bollire acqua del rubinetto

…

Operational details

To better understand the scope of the problem, it's useful to analyze the regulations governing water quality in the Canton of Ticino. According to cantonal law, drinking water must meet certain safety parameters, as established by the Department of Energy, Waste, and Water (DEWA). In the event of contamination or technical issues, authorities must immediately adopt emergency measures, including notification to the population and the adoption of safety measures. The Swiss legislation, also implemented in Ticino, imposes very strict limits on microbiological and chemical parameters for water intended for human consumption. Cantonal and federal law are based on European and international standards, which provide for periodic controls and laboratory analysis. In this case, the analyses conducted by local technicians have highlighted anomalies that render the water non-potable. The following table summarizes the main water quality parameters and maximum permissible limits:

| Parameter | Maximum Limit | Current Result | |--------------|------------------|-----------------| | Total Coliforms | 0 CFU/100 ml | Non-conformant | | E. coli | 0 CFU/100 ml | Non-conformant | | Pesticides | Not detectable | Not detected | | Chlorine | 0.2 mg/l | Conformant | | pH | 6.5 - 9.5 | Conformant |

…

Key points

To effectively tackle this emergency, the population and border workers must follow some practical procedures. First and foremost, it is recommended to use exclusively bottled water or water from safe sources until further notice. If tap water is needed, it is essential to boil it for at least 5 minutes, ensuring it reaches a temperature of around 100°C. This process eliminates any potential microbiological agents and makes the water safe for consumption. For residents and border workers, it is useful to prepare an emergency kit containing mineral water, clean containers, and cooking and hygiene tools. Local and cantonal authorities are setting up water distribution points, accessible to people with reduced mobility as well. It is advisable to regularly check the official website of the Municipality of Lavizzara and social media channels for updates. To facilitate management, it is also possible to download and use the boiling calculator, which allows for easy verification of boiling times and planning of daily activities. It is essential to respect the deadlines provided by the authorities and maintain an informed and collaborative attitude. Prevention of potential health risks also depends on correct water usage and awareness of quality parameters. Let's remember that the emergency may last for several days, during which monitoring will continue to ensure the safety of everyone. In case of doubts or symptoms of illness related to water usage, it is recommended to consult a doctor immediately. For border workers working in Ticino, it is essential to plan in advance the procurement of safe water, especially in the presence of children or elderly people. Collaboration between citizens and authorities is crucial to overcome this critical phase and minimize any discomfort. For further tools and updates, you can visit the water safety section on the cantonal department's website or consult the FAQs for practical clarifications.

Frequently Asked Questions

What should I do with non-drinking water in Lavizzara?: You should avoid drinking, brushing your teeth or preparing cold foods with tap water in the affected fractions. Use bottled water or, if necessary, boil water for at least 5 minutes before each use. Check for updates on the website of the Municipality of Lavizzara or on its social media channels.
How do I boil tap water to make it safe?: To make tap water safe, fill it in a clean saucepan, bring to a full boil (about 100°C) and keep it boiling for at least 5 minutes with the lid closed. After boiling, let it cool down covered and you can use it for drinking, cooking or oral hygiene.
Which fractions of Lavizzara are affected by the warning of contaminated water?: The hamlets warned are Piano di Peccia, Sant'Antonio, San Carlo, Cortignelli and Veglia, all located in the Lavizzara valley. In these locations, the water of the aqueduct has been declared undrinkable due to the presence of coliforms and E. coli, so it is mandatory to boil it or use bottled water until further notice.
When will the water become drinkable in Lavizzara?: The authorities have indicated that the situation may last a few days, with the next official communication expected within 48 hours. Laboratory tests must confirm the removal of coliforms and E. coli; only then will the water return to the cantonal limits (0 CFU/100 ml) and be drinkable again.