Rocks & Soils
This rock type forms from cooled molten material and is usually impermeable.
What is igneous rock?
This soil type has very small particles and very low permeability.
What is clay?
This system treats wastewater onsite using a tank and drain field.
What is a septic system?
This federal law regulates pollution discharged into rivers and lakes.
What is the Clean Water Act (CWA)?
This rock type often has high porosity and permeability and forms from sediments.
What is sedimentary rock?
This soil type allows water to move quickly and is good for drainage.
What is sand or gravel?
This system collects wastewater through sewers and treats it at one facility.
What is a centralized wastewater treatment plant?
This federal law protects public drinking water quality.
What is the Safe Drinking Water Act (SDWA)?
This property describes how much empty space exists in soil or rock.
What is porosity?
This chart uses sand, silt, and clay percentages to classify soil type.
What is the triangular soil classification chart?
This wastewater problem occurs when stormwater overwhelms old sewer systems.
What is a combined sewer overflow (CSO)?
This concept focuses on protecting the environment while conserving resources.
What is green engineering?
This property describes how easily water flows through connected pore spaces.
What is permeability?
This organization provides soil survey maps used for septic and land planning.
What is the NRCS (Natural Resources Conservation Service)?
This factor is critical when deciding if septic systems will work safely.
What is soil permeability or groundwater depth?
These systems use plants and natural processes to treat wastewater.
What are constructed wetlands?