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Water: Water Quality Standards Academy

Basic Course: Supplemental Topics (Human Health Criteria) Brief Quiz

Human Health Ambient Water Quality Criteria

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To complete your review of the topic in this module, please take the self-assesement quiz by reviewing each question and considering the possible responses.

A note about the quiz:

At the bottom of this page are the answers for this section.

Answer each of the questions below

1. Which of the following is not a typical element of an assessment for deriving Section 304(a) criteria?"
  1. Exposure.
  2. Treatment technologies.
  3. Bioaccumulation.
  4. Toxicity.
  5. Criterion formulation
2. Statement: Section 304(a)(1) criteria are regulatory limits that states/tribes are required to adopt.
  1. True.
  2. False.
3. Statement: Health assessments may include data and information on cancer effects, noncancer effects, and organoleptic effects.
  1. True
  2. False.
4. Statement. The RfD is a threshold value below which noncarcinogenic toxic effects are unlikely to occur.
  1. True.
  2. False.
5. Which of the following represents the Carcinogenic Potency Slope factor?
  1. RL
  2. RfD
  3. CSF (Q1*)
  4. BAF

Answers

  1. Which of the following is not a typical element of an assessment for deriving Section 304(a) criteria?

    Answer: Treatment technologies. The other four elements are usually part of an assessment for developing or revising Section 304(a) criteria. Consideration of treatment technologies is not part of the criteria derivation process. Section 304(a) criteria are based solely on human health and do not reflect consideration of economic or social impacts or technological feasibility.

  2. True or False Statement: Section 304(a)(1) criteria are regulatory limits that states/tribes are required to adopt.

    Answer: False. These criteria are not Federal regulations; however, they are sometimes used by the states/tribes to establish standards. They present scientific data and guidance on the environmental effect of pollutants, which can be useful to derive regulatory requirements.

  3. True or False Statement: Health assessments may include data and information on cancer effects, noncancer effects, and organoleptic effects.

    Answer: True. The review of health effects data and relevant information may address carcinogenic endpoints, noncancer endpoints, and/or undesirable taste and odor (organoleptic) effects imparted by a chemical to ambient water.

  4. True or False Statement. The RfD is a threshold value below which noncarcinogenic toxic effects are unlikely to occur.

    Answer: True. RfD is the Reference Dose or the daily estimated exposure to a human population that is not likely to cause deleterious effects over a lifetime. The RfD is expressed as milligrams of toxicant per kilogram of human body weight per day (mg/kg/day).

  5. Which of the following represents the Carcinogenic Potency Slope factor?

    Answer: CSF (Q1*). This is a number that provides an indication of the potential that a chemical has to cause cancer in humans. The number is derived by animal studies or epidemiological data on human exposure and use of a linear model. The CSF (Q1*) is expressed as mg/kg/day.


Disclaimer:
For informational purposes only–Not official statements of EPA policy.

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