It actually 513.08 that says it’s illegal to dump sewage into anything other than an approved sewerage system.
http://www.flsenate.gov/Laws/Statutes/2018/Chapter513/All
513.08?Disposal of sewage.—
(1)?It is unlawful to empty any receptacle or fixture containing human excreta, human urine, or any other liquid waste from a mobile home or recreational vehicle or at a recreational campsite except into a sewerage system approved by the department.
(2)?The operator or permittee of a mobile home park, lodging park, recreational vehicle park, or recreational camp shall provide such means for the emptying of such receptacles and for their cleaning as specified in the rules of the department.
History.—s. 1, ch. 19365, 1939; CGL 1940 Supp. 4150(2); ss. 19, 35, ch. 69-106; s. 3, ch. 76-168; s. 445, ch. 77-147; s. 1, ch. 77-457; ss. 2, 3, ch. 81-318; ss. 8, 14, 15, ch. 83-321; ss. 14, 26, ch. 93-150.
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