Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 302 - WATER QUALITY STANDARDS
Subpart F - PROCEDURES FOR DETERMINING WATER QUALITY CRITERIA
Section 302.642 - The Human Threshold Criterion
Universal Citation: 35 IL Admin Code ยง 302.642
Current through Register Vol. 48, No. 38, September 20, 2024
The Human Threshold Criterion (HTC) of a substance is that concentration or level of a substance at which humans are protected from adverse effects resulting from incidental exposure to, or ingestion of, surface waters of the State and from ingestion of aquatic organisms taken from surface waters of the State. HTCs are derived for those toxic substances for which there exists a threshold dosage or concentration below which no adverse effect or response is likely to occur.
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