Short answer. Argentina has no public national list of boil-water or do-not-drink notices. In Buenos Aires and the 26 surrounding districts served by AySA, the regulator ERAS checks 39 water quality parameters, with values similar to WHO recommendations 1. SINAGIR asks households to keep bottled water for one day in their emergency backpack 2. Water stress is low, but drought risk in cities is medium to high 3.
How do I know if my tap water is unsafe?
There is no national page of boil-water notices to check. In the area served by AySA (the City of Buenos Aires and 26 districts), the operator must control 39 physical, chemical and bacteriological parameters, sampling at around 750 points of the network each year 1. ERAS says the limit values are similar to those recommended by the World Health Organization 1. AySA must report confirmed bacteriological anomalies to ERAS within 24 hours, and ERAS follows them until they are resolved 1. Users can also report anomalies 1.
These reports go to the regulator, no public list of them was found, and the ERAS page covers only AySA's area 1. Outside it, ask your local water provider. If you are told to boil or not to drink the water, follow the local instruction; see What to do during a boil-water notice and Do-not-drink notices. For how official warnings reach you, see our Argentina alerts page.
How much water should I store?
SINAGIR's emergency backpack should hold bottled water for one day 2. It gives no litres per person and no longer home reserve. Details are on our Argentina emergency supplies page. For longer outages, see How much water to store per person per day? and Water storage containers; these are general benchmarks, not Argentine recommendations.
Is Argentina short of water?
Not overall, but droughts are a real risk. In WRI's Aqueduct 4.0 model, the population-weighted median of Argentine cities falls in the "low" category for current water stress and stays "low" in the 2050 business-as-usual projection, but is "medium to high" for drought risk 3. These are city medians: a given town or basin can sit higher or lower.
To follow current conditions, SISSA, the drought information system for southern South America, publishes the current drought status, drought indices and a 15-day drought forecast 4. SISSA is regional and covers more than Argentina 4. For household steps, see Drought preparedness.
What if I have a private well?
No national official guidance for private wells was found. See Private well emergencies for when a well may be contaminated, and How to purify water.
What should I do after a flood?
Follow official instructions on tap water, and see Water safety after a flood. A household plan can keep your water stock and local contacts in one place.
Frequently asked questions
Who controls tap water quality in Buenos Aires?
AySA runs the controls and ERAS, the regulator, verifies them with its own sampling and analysis 1.
How many days of water does Argentina recommend?
SINAGIR asks for bottled water for one day in the emergency backpack, with no litre figure 2.
Where can I check drought conditions?
On SISSA, which shows the current drought status and a 15-day drought forecast for southern South America 4.
Is tap water in Argentina safe to drink?
In AySA's area, the limits are similar to WHO recommendations and are checked by ERAS 1. No national results page was found for other provinces.
Sources
- Ente Regulador de Agua y Saneamiento (ERAS) — Normas de calidad ERAS — https://www.argentina.gob.ar/eras/institucional/informacion-tecnica/normas-de-calidad (accessed 2026-10-27)
- SINAGIR - Agencia Federal de Emergencias, Ministerio de Seguridad Nacional — Kit de Emergencias — https://www.argentina.gob.ar/sinagir/kit-de-emergencias (accessed 2026-10-27)
- World Resources Institute (WRI) — Aqueduct 4.0 (water stress, 2050 projection and drought risk) — https://www.wri.org/aqueduct (accessed 2026-10-27)
- Centro Regional del Clima para el Sur de América del Sur (CRC-SAS) — SISSA – Sistema de Información sobre Sequías para el sur de Sudamérica — https://sissa.crc-sas.org/ (accessed 2026-10-27)
Turn this into action
Your plan for Argentina, worked out for your household.
- Water, food and equipment counted for each person and pet
- The nuclear plants and zones around your home
- Phaenyx Safe: one tap to tell your people you are safe
Sources
- Ente Regulador de Agua y Saneamiento (ERAS) · Normas de calidad ERAS checked 2026-10-27
- SINAGIR - Agencia Federal de Emergencias, Ministerio de Seguridad Nacional · Kit de Emergencias checked 2026-10-27
- World Resources Institute (WRI) · Aqueduct 4.0 (water stress, 2050 projection and drought risk) checked 2026-10-27
- Centro Regional del Clima para el Sur de América del Sur (CRC-SAS) · SISSA – Sistema de Información sobre Sequías para el sur de Sudamérica checked 2026-10-27