As used in this part, unless the context requires otherwise:

“EPA risk assessment guidelines” means guidelines developed by the United States Environmental Protection Agency for the assessment of health risks from environmental pollutants and includes, but is not limited to, Guidelines for Estimating Exposures, Guidelines for Mutagenicity Risk Assessment, Guidelines for the Health Assessment of Suspect Developmental Toxicants, and Guidelines for the Health Risk Assessment of Chemical Mixtures.

“Federal drinking water guidelines” means a proposed maximum contamination level, health advisory, or other guidance developed by the United States Environmental Protection Agency to assist a state agency in responding to a contaminant in drinking water for which no maximum contamination level (MCL) is established.

“Interim action level” means a level established by the director of health for a contaminant in a public drinking water supply for which a maximum contamination level is not established by the EPA.

“Reliable analytical data” means information approved by the director as indicating the presence of a contaminant in a water sample at or above the limit of detection and developed according to generally recognized standards of good field practices and good laboratory practices for sampling and analysis of contaminants in water.