Wastewater Plants

I am looking for wastewater treatment plants or related types of wastewater treatment in the Sosua or outlaying areas,, I will be there on august 2nd and will need help locateing these, of you can help direct me also looking to photograph enviromental issues related to health dangers and exposure to such things as fecal coliform, red tide, floculants in standing water and so fourth if you think you can help me please post here or email bentwire@cox.net