In blender, combine fresh mango with one cup of water and agave. Blend until smooth. If desired, strain.

In large, half-gallon pitcher or jar, add mango mixture, remaining water, lime juice, zest and chili powder. Stir together to evenly combine. Taste and adjust measurements if necessary.

In small, shallow plate or bowl, combine chili powder, lime zest and sea salt. Use a fresh lime wedge to wet the rims of serving cups. Dip rims into chili powder mixture to coat.

Add ice to prepared glasses and fill with limeade. Garnish with fresh cilantro and lime wedge.