Private Well Water Resources for Community Partners

(Updated 2/5/2014)

The resources provided below are for organizations interested in learning more about the drinking water that comes from private wells in Maine. Use these resources to plan and evaluate community prevention activities, apply for funding, and monitor this important environmental health issue in Maine. Work is underway to make additional resources available on this page, so check back often.

Questions about these resources? Contact Karyn Butts at 207-287-6650 or


In early 2014, the Maine Tracking Network data portal will include private well water quality data (for arsenic, fluoride, manganese, nitrate, nitrite, and uranium) for towns, Healthy Maine Partnership service areas, counties, Public Health Districts, and the state. You will also be able to explore Behavioral Risk Factor Surveillance System data about homes with wells and well water testing behavior.

In the meantime, use the maps and tables below to learn about private well water in Maine. Use the USGS report below to find arsenic concentrations by town.

Concentration Data: For each contaminant there are maps showing the percentage of wells that exceed the health standard for that contaminant and the maximum level recorded for each contaminant. In addition, there is a table showing several measures for each contaminant summarized by county. All documents are provided as PDFs.

ppm=parts per million which is the same as milligrams per liter (ug/L); ppb=parts per billion which is the same as micrograms per liter (mg/L)

Note: Maps were created by the Maine Geological Survey. The data source for these maps are well water test results analyzed by the State of Maine Health and Environmental Testing Laboratory from the years 2005-2009, and do not include test results analyzed by any of Maine's private laboratories.Data for these maps were prepared by the U.S. Geological Survey and the Maine CDC. For more about interpreting these maps see the training webinar below.

Survey Data: Use these tables to learn more about the number of homes with wells in Public Health Districts or counties, as well as the number of wells that have been tested for arsenic, according to Behavioral Risk Factor Surveillance System data. All tables are provided as PDFs.


Assessment of Arsenic Concentrations in Domestic Well Water, by Town, in Maine, 2005–09; United States Geological Survey External site disclaimer


The following webinar was presented to community partners in March, 2012, and provides an excellent overview of private well water issues in Maine, health concerns related to commonly found contaminants, information on interpreting maps of contaminants, and available resources. This is a great place to start for those new to the topic.

Well Water Webinar External site disclaimer

Resources to Use in Your Community

Contact Karyn Butts to order bulk quantities of brochures, posters, and tipsheets: or 207-287-6650.

For Community Grantees

Information and documents provided in this section will be updated as contracts are awarded to community partners pending the outcome of a competitive Request for Proposal process that will occur in early 2014.

  • Contract Guidelines and Requirements
  • Quarterly Narrative and Financial Reporting Forms
  • Evaluation Plan (PDF)
  • Webinar Dates
  • Sharing Summit Dates