Table-Top Water Pitcher to Reduce Arsenic Exposure Among Well Users in New Hampshire

NCT ID: NCT07103356

Last Updated: 2026-01-22

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 50 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2026-02-02
• Study Completion Date: 2027-08-31

Brief Summary

The goals of this clinical trial are to:

1. gather preliminary data on the effectiveness of a table-top water pitcher filtration system in reducing arsenic exposure among individuals using private wells with elevated (>5 μg/L) arsenic concentrations, and

2. identify the factors influencing implementation of the filter intervention (uptake and sustainability) and barriers and facilitators to its use.

The main questions it aims to answer are:

Do water and urinary arsenic concentrations change from baseline to Week 4 of the water pitcher intervention?

Are changes in arsenic concentrations maintained during the eight-week sustainability period?

• Which factors facilitate or impede uptake, use, and sustainability of the intervention?
• Are household income and/or home ownership associated with sustained filter use?

Participants will:

• Receive a free 12-cup water filter pitcher and cartridge replacements
• Use the pitcher filtration system, including replacement of filter cartridges, per manufacturer recommendations
• Collect and mail water and urine samples at baseline, 4 weeks, and 12 weeks
• Complete online questionnaires at baseline, 4 weeks, and 12 weeks

Conditions

Arsenic Poisoning; Environmental Exposure; Water-Related Diseases

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Water Pitcher Filtration System

Arm 1: No reminders to change water pitcher filter cartridges Arm 2: Weekly reminders to change water pitcher filter cartridges

Group Type: EXPERIMENTAL

Water Pitcher Filtration System

Intervention Type: BEHAVIORAL

Table-top water pitcher filtration system

Interventions

Water Pitcher Filtration System

Table-top water pitcher filtration system

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• Age 18 years or older
• NH resident
• Receiving primary care at Dartmouth Hitchcock Clinics - Concord
• Use a private water system as primary drinking water source
• Do majority (>50%) of food preparation in home
• Interested in receiving a free water arsenic test kit
• Water arsenic >5 micrograms/L upon testing

Exclusion Criteria

• Use or plan to use a mitigation strategy to reduce exposure to arsenic-contaminated drinking water

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Trustees of Dartmouth College

OTHER

Sponsor Role: lead

Responsible Party

Caitlin G. Howe

Assistant Professor of Epidemiology

Responsibility Role: PRINCIPAL_INVESTIGATOR

Central Contacts

Caitlin Howe, PhD

Role: CONTACT

caitlin.g.howe@dartmouth.edu

603-646-5419

Other Identifiers

STUDY00033185

Identifier Type: -

Identifier Source: org_study_id