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Improve private well testing outreach efficiency by targeting households based on proximity to a high arsenic well.

ABSTRACT: Research into precautionary action suggests outreach with personally-relevant risk information may help overcome optimistic biases, which have been shown to impede voluntary testing for arsenic by at-risk private well households. Since 2002, New Jersey's Private Well Testing Act (PWTA) has required testing for arsenic during real estate transactions. The PWTA database of over 35,000 geocoded well arsenic tests offers a unique opportunity to evaluate the efficacy of targeted outreach to neighbors living in proximity to a known high arsenic well with variable risk messaging to motivate testing. In this study, residents of properties (n = 1743) located within 500 ft and between 500 and 1000 ft of a known high arsenic well (>5 μg/L, New Jersey's drinking water arsenic standard) were mailed a notice of the high arsenic result in their neighborhood and offered a free water test. Overall 274 households (16%) requested a test kit and 230 (13%) ultimately submitted a water sample; with significantly higher participation rates among those told their neighborhood well had an arsenic concentration "over 5 times higher" than the standard, compared to those told the concentration was "above." Overall, 25% of wells tested (n = 230), and 47% (n = 66) of non-treated wells located within 500 ft of a well with >25 μg/L arsenic, exceeded the standard for arsenic. Both the arsenic concentration and distance to the neighboring well were significant predictors of exceedance. Given the high proportion of previously untested wells (70%) and their owners' lack of awareness of arsenic in their area (80%), this targeting approach succeeded not only in identifying a much higher proportion of at risk wells than blanket testing by town or county, but also in motivating testing among households unreached by prior awareness-raising activities. In conclusion, geographically and personally-relevant risk targeted messaging and outreach are both efficient and effective.

SUBMITTER: Flanagan SV

PROVIDER: S-EPMC7429275 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:Exposure to naturally occurring arsenic in groundwater is a public health concern, particularly for households served by unregulated private wells. At present, one of the greatest barriers to exposure reduction is a lack of private well testing due to difficulties in motivating individual private well owners to take protective actions. Policy and regulations requiring testing could make a significant contribution towards universal screening of private well water and arsenic exposure reduction. New Jersey's Private Well Testing Act (PWTA) requires tests for arsenic during real estate transactions; however, the regulations do not require remedial action when maximum contaminant levels (MCLs) are exceeded. A follow-up survey sent to residents of homes where arsenic was measured above the state MCL in PWTA-required tests reveals a range of mitigation behavior among respondents (n = 486), from taking no action to reduce exposure (28%), to reporting both treatment use and appropriate maintenance and monitoring behavior (15%). Although 86% of respondents recall their well was tested during their real estate transaction, only 60% report their test showed an arsenic problem. Treatment systems are used by 63% of households, although half were installed by a previous owner. Among those treating their water (n = 308), 57% report that maintenance is being performed as recommended, although only 31% have tested the treated water within the past year. Perceived susceptibility and perceived barriers are strong predictors of mitigation action. Among those treating for arsenic, perceived severity is associated with recent monitoring, and level of commitment is associated with proper maintenance. Mention of a treatment service agreement is a strong predictor of appropriate monitoring and maintenance behavior, while treatment installed by a previous owner is less likely to be maintained. Though the PWTA requires that wells be tested, this study finds that not all current well owners are aware the test occurred or understood the implications of their arsenic results. Among those that have treatment installed to remove arsenic, poor monitoring and maintenance behaviors threaten to undermine intentions to reduce exposure. Findings suggest that additional effort, resources, and support to ensure home buyers pay attention to, understand, and act on test results at the time they are performed may help improve management of arsenic water problems over the long term and thus the PWTA's public health impact.

Project description:Private well stewardship, including on-going testing and treatment, can ensure private well users are able to maintain source-water quality and prevent exposures to potentially harmful constituents in primary drinking water supplies. Unlike municipal water supplies, private well users are largely responsible for their own testing and treatment and well stewardship is often minimal. The importance of factors influencing regular testing, and treatment behaviors, including knowledge, risk perception, convenience and social norms, can vary by geography and population characteristics. The primary goals of this study were to survey a general statewide population of private well users in Wisconsin in order to quantify testing and treatment patterns and gather data on motivations and barriers to well stewardship. The majority of respondents reported using and drinking well water daily but only about one half of respondents reported testing their wells in the last ten years and of these, only 10% reported testing in the last 12months. Bacteria and nitrates were contaminants most often tested; and, a private laboratory most often conducted testing. The most commonly reported water treatment was a water softener. Living in a particular geographic region and income were the most significant predictors of water testing and treatment. Iron and hardness, which influence water aesthetics but not always safety, were the most commonly reported water quality problems. Health concerns or perceived lack thereof were, respectively, motivators and barriers to testing and treatment. Limited knowledge of testing and treatment options were also identified as barriers. Results confirm previous findings that well stewardship practices are minimal and often context specific. Understanding the target population's perceptions of risk and knowledge are important elements to consider in identifying vulnerable populations and developing education and policy efforts to improve well stewardship.

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Improve private well testing outreach efficiency by targeting households based on proximity to a high arsenic well.

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