It's best to avoid drinking tap water unless you treat it first with water purifying pills. Bottled water is widely available.
According to the CDC tap water is generally not safe for consumption.
According to the Numbeo water drinkability and accessibility index, tap water has a score of 55.7 / 100 (100 being best).
Numbeo considers this score to be "Moderate"
1 adult could save about 183$ per year in Algeria by drinking tap water instead of buying bottled water.
๐ณ Drinking tap water would also help with reducing your plastic footprint and improve environmental pollution.