 The remainder is effectively subsidized by the municipal and federal governments.In August 2007 a conflict had erupted between Conagua and the Federal District when Conagua increased the tariff for water supplied through the Cutzamala system and the District refused to accept the increase.The human rights commission of the District (CDHDF) warned in summer 2009 that water shortage could cause a "spiral of violence" and that low-income families are paying more for water of lower quality and only receive it at certain hours of the day.