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.

Provides air quality data from monitoring stations throughout the state. Data available include ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide, particulate matter, temperature, wind direction, humidity and wind speed.

A listing of weatherization services provided to Delaware residents through the Weatherization Assistance Program.

Data on advisories issued for water quality problems in selected recreational water areas.

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