A listing of permits for the installation of small (individual structure) and large (multi-structure) septic systems. This dataset includes information such as location (tax parcel), size and capacity, date, and permit number.

Database of Notices of Intent (NOI) to apply for coverage under the National Pollutant Discharge Elimination System (NPDES) general permit for storm water discharges associated with construction activity. A record of planned construction activities that might cause storm water discharges.

A listing of professionals issued licenses for eight classes of professional activity related to wastewater treatment and disposal systems.

Contains information about toxic chemicals in Delaware, based on annual reports from facilities that use or manufacture covered chemicals. These facilities report their data to both the Environmental Protection Agency (EPA) and the State of Delaware. DNREC reviews Toxics Release Inventory (TRI) reports received from Delaware facilities. The EPA publishes national TRI reports annually and provides a searchable database.