(a) Except as specifically provided herein, this chapter is not intended to apply to small-flow cluster systems as defined in Section 22-25B-1 and is supplemental to all other laws and administrative rules and is not intended to repeal or replace any existing statute except to the extent that there is a direct conflict. In such case, this chapter shall control. Any individual, company, or other entity installing, maintaining, repairing, servicing, or manufacturing wastewater systems including single family and small-flow cluster systems, cluster wastewater systems, and community wastewater systems must obtain an appropriate license from the Alabama Onsite Wastewater Board pursuant to Chapter 21A, of Title 34, or from the ADEM.

(b) Notwithstanding any other law, all subsurface distribution wastewater systems serving establishments, a single development, or contiguous developments which collectively have a design flow of 15,000 GPD or less shall be permitted and regulated by the ADPH pursuant to rules promulgated by the State Board of Health, and all subsurface distribution wastewater systems serving establishments, a single development, or contiguous developments which collectively have a design flow of more than 15,000 GPD shall be permitted and regulated by the ADEM pursuant to rules promulgated by the ADEM.

(c) This chapter shall not apply in any county which has a local constitutional amendment authorizing the regulation of wastewater utilities, unless provided for by local act or the Legislature by local law applicable to the county provides for alternative regulation and rate control to apply in the county.

(d) This chapter shall in no way infringe upon or replace the authority granted to the Jefferson County Board of Health pursuant to Act No. 659 (1978).