Social audit of water and sanitation projects

hello, we are planning to fund some water and sanitation project in rural area as a part of our social responsible agenda. As I can see many govt and funding agencies are pouring money in these type of projects to provide safe and clean water to poor communities. Is there any tool to measure the changes happening at the grass root level? Is their any social audit system developed for such projects? I would like to get inputs from community work experts. Thanks