Water Quality Avoidance Behavior: Bridging the Gap between Perception and Reality

Water quality remains a significant issue and a source of serious health concern in the developing world. This paper investigates the water averting behavior at the household level by using a primary survey data from Siddharthangar, Nepal. While past studies have generally attributed averting behaviors to risk perception, we place a particular emphasis on the divergence between the household’s perception of their drinking water quality and the actual water quality level in driving the averting behavior. The findings indicate that the perception of the water quality affects a household’s decision to employ water treatment measures. Households that considered their water to be safe were less likely to treat their water. Furthermore, in addition to perception, the result also suggests the deviation between actual and perceived water quality level could also be a crucial element in the decision to employ water treatment measures. Households with divergence between risk perception and the objective water quality levels were less likely to treat their water and this result held across different specifications. In contrast, households with minimal deviation were more likely to employ treatment measures. Findings also suggest the source of drinking water, education level, income and the taste of the drinking water also drives the averting behavior.

Detecting community response to water quality violations using bottled water sales

Drinking-water contaminants pose a risk to public health. When confronted with elevated levels of contaminants, individuals can take actions to reduce exposure. Yet, few studies address averting behavior due to impaired water, particularly in high-income countries. This is a problem of national interest, given that 9 million to 45 million people have been affected by water quality violations in each of the past 34 years. No national analysis has focused on the extent to which communities reduce exposure to contaminated drinking water. Here, we present an assessment that sheds light on how communities across the United States respond to violations of the Safe Drinking Water Act, using consumer purchases of bottled water. This study provides insight into how averting behavior differs across violation types and community demographics. We estimate the change in sales due to water quality violations, using a panel dataset of weekly sales and violation records in 2,151 counties from 2006 to 2015. Critical findings show that violations which pose an immediate health risk are associated with a 14% increase in bottled water sales. Generally, greater averting action is taken against contaminants that might pose a greater perceived health risk and that require more immediate public notification. Rural, low-income communities do not take significant averting action for elevated levels of nitrate, yet experience a higher prevalence of nitrate violations. Findings can inform improvements in public notification and targeting of technical assistance from state regulators and public health agencies in order to reduce community exposure to contaminants.