How do I know if my site discharges to a priority watershed?
Priority construction sites include any site that discharges to:
- A waterbody which is listed on the most recently EPA-approved 303(d) list of impaired waters for turbidity, siltation, or sedimentation,
- Any waterbody for which a TMDL has been finalized or approved by EPA for turbidity, siltation, or sedimentation,
- Any waterbody assigned the Outstanding Alabama Water use classification in accordance with ADEM Admin. Code r. 335-6-10-.09, and
- Any waterbody assigned a special designation in accordance with ADEM Admin. Code r. 335-6-10-.10, the CBMPP must be submitted to ADEM for review along with the NOI.
To determine if your site is discharging into a priority area, there are CSW GIS files available for download below as well as a list of TMDL and 303(d) waters.
- Please Note: The impaired water Three Mile Branch in Montgomery County is a 303(d) impairment, not a TMDL. This issue will be resolved in 2026.