Fig. 3. The social networks among municipalities for water quality management. The size of the red circle in each municipality corresponds the number of municipal links. Unlinked municipalities are shaded grey. a) Direct collaborations among municipalities (one-mode). b) Municipal collaborations with government agencies (two mode). c) Municipal collaborations with NGOs. d) All collaborations (one and two mode). Municipalities oriented toward agricultural production are shaded pink, while tourism oriented municipalities are shaded green.