The Voluntary Donation Program is an agreement between Municipal Utility Districts within the Greens Bayou Watershed and the Greens Bayou Coaltion to allow for collection of donations on residents' water bills to support community initiatives.

In 2015 the Texas Legislature passed H.B. 2528 (Texas Water Code Section 49.2291) allowing water districts to enter agreements with non-profits that provide economic development programs. Water districts collect donations on behalf of the non-profit, understanding that these funds will be allocated to projects preserving or increasing property values.