SEPTAGE
The City of West Palm Beach has a receiver (dump station) that accepts septage, wastewater sludge and other non-hazardous liquid wastes. Contact East Central Regional WWTP, 4325 N Haverhill Rd, WPB (off Ernest Dr) for Policy & Procedures and cost. 561.835.7400.
Also check with your local wastewater utility.
Also see Liquid Wastes.