ICR – Information Collection Rule
IESWTR – Interim Enhanced Surface Water Treatment Rule
Imminent Threat Violation
A condition at a PWS that may adversely affect the quality of drinking water and presents an immediate threat to public health.
A condition in which environmental conditions are not optimal to provide for the conversion of nitrate to nitrogen gas (some of the nitrate remains as nitrate and some undergoes partial conversion yielding concentrations of nitrite). Typically, incomplete denitrification results in high levels of nitrate in the wastewater effluent.
A condition in which not all ammonia is converted to nitrate (some of the ammonia remains as ammonia and some of the ammonia undergoes partial conversion yielding concentrations of nitrite). Typically, incomplete nitrification results in high levels of ammonia in the wastewater effluent.
Mixing of materials found on or spread upon the soil surface into the soil volume via the mechanical manipulation of the soil.
Wastewater or other liquid - raw (untreated) or partially treated - flowing INTO a reservoir, basin, treatment process, or treatment plant
Information Collection Rule
Information Collection Rule (ICR)
Describes material that is of mineral origin. Specifically, describes chemical compounds that do not contain carbon and hydrogen.
Material such as sand, salt, iron, calcium and other mineral materials that are only slightly affected by the action of organisms in wastewater treatment. Inorganic matter is comprised of chemical substances of mineral origin; whereas organic matter is comprised of chemical substances that are usually of animal or plant origin.