Is Tap Water Safe to Drink in Senegal?

Dakar draws water primarily from Lac de Guiers via a 250-km pipeline, supplemented by boreholes tapping the Thiès and Palezzo aquifers, all managed by SONES and operated by Sen'Eau (formerly SDE). Secondary cities like Saint-Louis and Ziguinchor rely more heavily on the Senegal River and local groundwater from the Continental Terminal and Maastrichtian aquifers.

Saltwater intrusion into coastal boreholes has raised salinity and fluoride levels in some Dakar suburbs, while aging distribution pipes allow bacterial recontamination, particularly during the rainy season when flooding overwhelms informal settlements. Groundwater in parts of the Senegal River delta shows elevated fluoride and arsenic in isolated locations.

Dakar and Thiès benefit from the most consistent treatment and supply, while rural Casamance and the Senegal River valley experience more frequent contamination and supply gaps, often requiring residents to rely on wells and standpipes of variable quality.

Water hardness varies significantly by source: Lac de Guiers-fed Dakar supply is moderately hard at roughly 150–250 mg/L, while some deep aquifer boreholes in the Thiès region can exceed 300 mg/L..

Urban residents commonly buy sachet water or bottled brands like Kirene, while boiling remains common in lower-income households and rural areas.

• •Drink bottled water such as Kirene or Diamniadio in restaurants and hotels
• •Avoid tap water in rural Casamance and river delta towns
• •Use filtered water for mixing infant formula
• •Check for elevated fluoride advisories if staying long-term near the Senegal River delta

• •Verify sachet water is from a reputable, sealed producer
• •Avoid tap water for drinking in Casamance and delta regions without boiling first