How much water does EMPAGUA supply versus the city's demand, where does it come from, and can bulk water be bought?

EMPAGUA manages some 4.0 m³/s against metropolitan demand of about 6 m³/s, a deficit of about 1.8 m³/s (an EMPAGUA figure for 2020). The mix is about 58% groundwater and 42% surface water according to EMPAGUA's 2017 balance, against a historical split of roughly 50/50; the Xayá-Pixcayá transfer, with a design flow of 3.0 m³/s, brings water from Chimaltenango to the Lo de Coy plant. The municipalities of the Mancomunidad Gran Ciudad del Sur depend on 6 springs and 163 municipal wells (about 1.86 m³/s); the MGCS total runs around 7.55-7.94 m³/s, including some 1.55 m³/s from private wells. Bulk water (Pentagua, Magdalena del Mar and others) is sold wholesale to EMPAGUA and municipalities, and the model is available to large users as well, with no public prices.