Water-quality guidelines for protection of aquatic life. Commonly refers to criteria established by the U.S. Environmental Protection Agency. See also Water-quality guidelines, Water-quality criteria, and Freshwater chronic criteria.
Pipe, conduit or channel designed to transport water from a remote source.
An underground geological formation containing water that supplies water for wells and springs such as water-bearing permeable rock, rock fractures, or unconsolidated materials.
The Arizona APP program was the first comprehensive groundwater protection program in the nation when it was adopted in 1987.Under the program, all groundwater is protected for drinking water use and discharges cannot cause an exceedance of a drinking water standard in groundwater.
A heterogeneous body of introduced permeable and less permeable material that acts as a water-yielding hydraulic unit of regional extent.
State of Arizona maximum levels for contaminants which apply to groundwater in aquifers designated for drinking water use. For example, the AWQS for tetrachloroethene (PCE) is 5 micrograms per liter (g/L).
A geologic formation (usually a layer of material such as clay) that creates an underground barrier to the flow of groundwater.
Under the Climate Action Reserve’s offset protocols, projects convert quantities of non-CO2 greenhouse gases (GHGs) into a quantity of CO2-equivalent (CO2e) using the 100-year global warming potential (GWP) values from the Intergovernmental Panel on Climate Change (IPCC). Reserve protocols currently reference the Fourth Assessment Report (AR4) of the IPCC, released in 2007.
Capable of being cultivated and suitable for crop production.
Air Resources Board
