A comprehensive study of 372 people living near Quebec farms found that pesticides reach homes through multiple pathways including contaminated water, food, household dust, and yard soil. The EPURA study collected over 2,250 urine samples and 1,049 dust wipes to measure exposure to 51 pesticides, with laboratory analysis expected to identify which exposure sources pose the greatest health risks in agricultural communities.
Researchers in Quebec are studying how pesticides from nearby farms get into people’s homes and bodies. The EPURA study tracked 372 people living within about a mile of vegetable farms over two years, collecting urine samples, dust, soil, and water to measure pesticide exposure. By analyzing 51 different pesticides and their breakdown products, scientists hope to understand which pathways, like contaminated water, dust, or food, pose the biggest health risks. According to Gram Research analysis, this comprehensive approach will help communities near farms reduce pesticide exposure and guide public health decisions.
Key Statistics
The EPURA study, an observational research project published in 2026, collected 2,257 urine samples and 1,049 household dust wipes from 372 participants living within 1,500 meters of vegetable farms in Quebec to measure exposure to 51 different pesticides.
Researchers in the EPURA study analyzed pesticide exposure across 173 households over two years, collecting 170 yard soil samples, 157 water samples, and 170 indoor dust samples to identify how pesticides from nearby farms contaminate residential environments.
A 2026 observational study of agricultural communities in Quebec measured pesticide exposure through biological samples (urine) and environmental samples (dust, soil, water), with laboratory analysis expected to complete in 2027 to identify major exposure pathways.
The Quick Take
- What they studied: How pesticides used on nearby farms end up in the homes and bodies of people living in agricultural communities
- Who participated: 372 people from 173 households living within 1,500 meters (about a mile) of vegetable farms in Quebec, Canada, studied over two years
- Key finding: Researchers collected over 2,250 urine samples, 1,049 household dust wipes, 170 water samples, and 170 yard soil samples to measure exposure to 51 different pesticides
- What it means for you: Understanding pesticide pathways into homes can help families near farms take targeted steps to reduce exposure, such as managing water sources or controlling household dust
The Research Details
The EPURA study is an observational study, meaning researchers watched and measured what naturally happens without changing anyone’s behavior. They recruited 372 participants from agricultural communities in Quebec and followed them for two years. During summer and winter months, participants collected urine samples monthly, wiped floors to collect household dust, and answered detailed questionnaires about their diet, water use, and pesticide exposure. At the end of summer, researchers also collected indoor dust, yard soil, and tap water samples. This multi-layered approach captures pesticide exposure from multiple sources, what people eat, drink, and breathe, plus what’s in their environment.
The study is designed to identify the main pathways pesticides take to reach people’s homes and bodies. Researchers used geographic information systems (basically detailed maps) to track where pesticides were applied on nearby farms. They combined this with food and water consumption data to estimate how much pesticide people ingested. By measuring pesticides in household dust and yard soil, they could assess residential contamination. This comprehensive approach allows scientists to connect the dots between farm applications and actual exposure in homes.
The research team will analyze all samples for 51 different pesticides and their metabolites (breakdown products the body creates). They’ll compare pesticide levels across seasons, age groups, and other population characteristics. Statistical analyses will identify which factors, like proximity to treated fields, water source, or household practices, most strongly predict pesticide exposure.
Previous research has raised concerns about pesticide exposure in agricultural communities, but scientists didn’t have clear data on how much exposure occurs or which pathways matter most. This study fills that gap by measuring actual pesticide levels in people’s bodies and homes, rather than just estimating exposure. Understanding the main sources of contamination allows public health officials to develop targeted interventions, like water treatment recommendations or dust control strategies, that actually address the biggest risks.
This study has several strengths: a large sample size (372 participants), multiple measurement methods (urine, dust, soil, water), measurement of 51 pesticides, and collection across both seasons. The study is still ongoing, laboratory analysis is expected to complete in 2027. As an observational study, it can identify associations between exposure sources and pesticide levels in people’s bodies, but cannot prove that one directly causes the other. The findings will be most applicable to agricultural communities similar to Quebec’s vegetable-growing regions.
What the Results Show
As of June 2026, the study team successfully completed recruitment and data collection from 173 households (372 participants). They collected an impressive amount of biological and environmental samples: 2,257 urine samples, 1,049 household dust wipes, 170 sealed petri dishes of indoor dust, 170 yard soil samples, and 157 water samples. This comprehensive sampling across summer and winter months provides a detailed picture of seasonal variations in pesticide exposure.
The study is currently in the laboratory analysis phase, where scientists will measure pesticide concentrations in all collected samples. Once this analysis is complete in 2027, researchers will examine how pesticide levels vary by season, age group, and other population characteristics. They’ll also analyze which factors, such as proximity to treated fields, water consumption patterns, dietary choices, and household practices, best predict pesticide exposure levels in residents’ bodies.
The research team will use advanced statistical methods to identify the most important exposure pathways. Rather than assuming all pesticide sources are equally important, they’ll determine which routes, contaminated water, food residues, household dust, or yard soil, contribute most to overall exposure. This targeted analysis will reveal where public health interventions could have the greatest impact.
The study will also examine how pesticide exposure differs between population subgroups, for example, comparing children to adults, or households with different water sources. Seasonal comparisons will show whether exposure is higher during active farming seasons (summer) or persists year-round. The research will assess whether households closer to treated fields have higher pesticide levels than those farther away, and whether specific household practices, like cleaning frequency or gardening habits, influence contamination levels.
Previous studies have raised concerns about pesticide exposure in agricultural communities, but most relied on estimated exposure rather than actual measurements in people’s bodies. The EPURA study advances this field by combining biological measurements (pesticides in urine) with environmental measurements (pesticides in dust, soil, and water) and exposure estimates (based on farm applications and food consumption). This integrated approach is more comprehensive than previous research and will provide clearer evidence about which exposure pathways matter most.
The study focuses on agricultural communities in Quebec, so findings may not apply to other regions with different farming practices, pesticides, or climates. As an observational study, it can show associations between exposure sources and pesticide levels but cannot prove causation. The study measures pesticide exposure at one point in time (summer and winter), so it may not capture exposure patterns during spring or fall. Finally, the study relies on self-reported information about diet and water consumption, which may not be perfectly accurate.
The Bottom Line
People living near agricultural areas should be aware that pesticide exposure can occur through multiple pathways, food, water, household dust, and yard soil. While results are pending, current evidence suggests reducing exposure by: using water filters if tap water is contaminated, washing produce thoroughly, minimizing tracked-in soil and dust, and staying informed about pesticide applications near homes. Confidence in these recommendations will increase once laboratory results are available in 2027.
Families living within 1-2 kilometers (0.6-1.2 miles) of vegetable farms or other agricultural areas should pay attention to this research. Parents of young children, pregnant women, and people with chemical sensitivities may want to take extra precautions. Agricultural workers and their families face even higher exposure risks. Public health officials and policymakers should use these findings to develop community-level strategies for reducing pesticide exposure.
Laboratory analysis is expected to complete in 2027, with statistical analysis and publication of findings following shortly after. Practical recommendations based on this research will likely emerge in 2027-2028. Changes in household practices or public health policies based on these findings may take 1-2 years to implement and show measurable effects on exposure levels.
Frequently Asked Questions
How do pesticides from farms get into people’s homes?
Pesticides reach homes through multiple pathways: contaminated drinking water, residues on food, dust particles carried indoors on clothing and shoes, and soil tracked into yards and homes. The EPURA study measured all these sources to determine which pathways contribute most to overall exposure in agricultural communities.
What pesticides are most common in agricultural communities?
The EPURA study measured 51 different pesticides and their breakdown products in urine, dust, soil, and water samples from Quebec agricultural communities. Specific findings about which pesticides are most prevalent will be available when laboratory analysis completes in 2027.
How far from farms does pesticide contamination extend?
The EPURA study recruited participants living within 1,500 meters (about a mile) of vegetable farms, suggesting pesticide exposure occurs at this distance. The research will determine whether contamination decreases with distance and identify safe distances from treated fields.
Can I reduce pesticide exposure if I live near farms?
Potential strategies include using water filters, washing produce thoroughly, minimizing tracked-in soil and dust, and staying informed about pesticide applications. The EPURA study will provide evidence-based recommendations once results are available in 2027.
Does pesticide exposure differ between seasons?
The EPURA study collected samples during both summer and winter months to compare seasonal exposure patterns. Results will show whether exposure is higher during active farming seasons or persists year-round in agricultural communities.
Want to Apply This Research?
- Track weekly water consumption from different sources (tap, bottled, filtered) and correlate with seasonal pesticide application periods in your area. Users can log gallons consumed and note any changes in water taste or appearance.
- Set reminders to clean household surfaces weekly during high-pesticide-application seasons (typically summer). Log cleaning activities and track dust accumulation patterns to identify high-contamination areas in your home.
- Create a seasonal exposure dashboard tracking: water source usage, produce consumption, household cleaning frequency, and proximity to known pesticide applications. Compare exposure patterns across seasons to identify peak-risk periods and adjust household practices accordingly.
This article summarizes research in progress; laboratory analysis is expected to complete in 2027. The findings will apply primarily to agricultural communities similar to Quebec’s vegetable-growing regions. This information is educational and should not replace professional medical advice. People concerned about pesticide exposure should consult with healthcare providers or local public health officials. The EPURA study is observational and identifies associations, not definitive cause-and-effect relationships. Individual pesticide exposure varies based on location, water source, diet, and household practices.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.
