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Using In-Home Air Quality Monitoring to Reduce Cannabis Secondhand Smoke Exposure in Children: Quantitative Pilot

Vincent Berardi1, Bradley N Collins2, Laura M Glynn1

  • 1Department of Psychology, Crean College of Health and Behavioral Science, Chapman University, 1 University Drive, Orange, CA, 92866, United States, 1 (714) 516-5883.

JMIR Formative Research
|June 16, 2026
PubMed
Summary

Indoor air quality monitoring can help parents who smoke cannabis reduce their children's exposure to secondhand cannabis smoke (cSHS). This pilot study showed IAQ monitoring increased awareness and led to reduced indoor smoking around children.

Keywords:
cannabisdigital healthindoor air monitoringsecondhand smokeself-monitoring

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Area of Science:

  • Environmental Health
  • Public Health
  • Pediatrics

Background:

  • Millions of children are exposed to secondhand cannabis smoke (cSHS) due to indoor cannabis use by parents.
  • Indoor air quality (IAQ) monitoring shows potential for reducing exposure to airborne pollutants, similar to its success with tobacco smoke.

Purpose of the Study:

  • To assess the feasibility, acceptability, and effectiveness of using IAQ monitors to reduce children's cSHS exposure.
  • To evaluate the impact of IAQ monitoring on caregivers' awareness and smoking behaviors.
  • To explore participant engagement and household communication regarding indoor cannabis smoking.

Main Methods:

  • A 3-week pilot study involving 14 adults who smoked cannabis indoors with children.
  • Participants used an IAQ monitor measuring PM2.5, VOCs, CO2, temperature, and humidity.
  • Data collected via daily surveys and baseline/end-of-study assessments.

Main Results:

  • High participant engagement with IAQ monitors (85% daily review).
  • Reduced reported instances of children being present during cannabis smoking (from 4.5 to 2.8 days/week).
  • 62% of participants reduced or considered changing smoking habits; 62% reported IAQ monitoring facilitated discussions on indoor smoking rules.

Conclusions:

  • In-home IAQ monitoring is feasible and useful for caregivers smoking cannabis indoors.
  • Real-time IAQ feedback enhances risk awareness and promotes dialogue, leading to reduced indoor smoking around children.
  • IAQ monitoring shows promise as a scalable tool for reducing children's cSHS exposure, warranting further research.