March 4, 2026

«First_Name» «Last_Name» «First_Name_2» «Last_Name_2»

«Mailing_Address_»

«Owner_City»

Re: Results from the Recent Testing of Your Water Supply at «Property_Address».

Dear Homeowner,

This letter provides you with the results of the drinking water test conducted on the sample collected from your property on «Date_Sampled». The sample was analyzed by Pace and A&L Analytical Laboratories and tested for the presence of per- and polyfluoroalkyl substances (PFAS) and general potability parameters.

In 2021, Maine established an Interim Drinking Water Standard of 20 nanograms per liter (ng/L) for the sum of six PFAS compounds: PFOA, PFOS, PFNA, PFHpA, PFHxS and PFDA to apply to certain regulated public water systems. This is the standard that Maine DEP is applying to private water supplies. Please see the table below to compare your drinking water results to this standard.

Your Results Compared to the Maine Standard for PFAS

SAMPLE	PFOA	PFOS	PFNA	PFHxS	PFHpA	PFDA	YOUR TOTAL	ME STANDARD	RESULT
Your Results	20	DOES NOT EXCEED STANDARD

All units in nanograms per liter (ng/L), which is also the same as parts per trillion (ppt)

ND = compound not detected

The results for the sample collected from your private well are below 20 ng/L for the six PFAS compounds; therefore, the Department does not recommend treatment at this time. The laboratory report, which includes the analysis results for your well water, is attached.

We appreciate your cooperation with this investigation. The Department may contact you to request permission for a follow-up sample from your well to help us better understand PFAS impacts in Maine.

If you are interested in additional information about these chemical compounds or the investigation, please feel free to visit our webpage located at: http://www.maine.gov/dep/spills/topics/pfas/index.html. If you have questions, please feel free to contact me at [TELEPHONE] or [EMAIL].

Sincerely,

[NAME]

Project Lead

Maine Department of Environmental Protection

[TELEPHONE], [EMAIL]

Attachments:

Additional Resources

Analytical Results

PFAS Testing in Private Wells: Understanding Your Results

How to Read and Interpret my PFAS Laboratory Data Report

additional resources For additional comparison, the federal Environmental Protection Agency has established criteria, called Maximum Contaminant Levels (MCLs), for six PFAS (announced April 2024). However, these levels only apply to regulated public water supplies, not to private water supplies. They are for reference only and are not applicable to this private well water investigation near sludge and septage land application sites. At this time, the Department does not have funding available to provide treatment systems at private water supplies that do not exceed the State of Maine Interim Drinking Water Standard.

Your Results Compared to the Federal Maximum Contaminant Levels

SAMPLE	PFOA	PFOS	PFHxS	PFNA	HFPO-DA (GenX)	Mixture of two of more: PFNA, PFHxS, HFPO-DA, and PFBS
Maximum Contaminant Level	4.0	4.0	10	10	10	Hazard Index of 1 (unitless)
Your Results
“X” Indicates Exceedance	X

For more information related to water filtration systems, well water, and PFAS in Maine, please visit:

Maine DEP Website: General Information about PFAS Investigation in Maine https://www.maine.gov/dep/spills/topics/pfas/index.html

Maine DHHS CDC: Private Well Owner Resources
https://www.maine.gov/dhhs/mecdc/healthy-living/health-and-safety/drinking-water-safety/private-well-water

Maine Department of Agriculture, Conservation & Forestry: PFAS in Agriculture https://www.maine.gov/dacf/ag/pfas/index.shtml

University of Maine Cooperative Extension: Agriculture Guidance
https://extension.umaine.edu/pfas/

Federal Environmental Protection Agency: Home Water Filter Fact Sheet and MCL Information

https://www.epa.gov/system/files/documents/2024-04/water-filter-fact-sheet.pdf

https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas

The Maine CDC Drinking Water Program has incorporated by rule the April 2024 federal Environmental Protection Agency PFAS standards. The federal Maximum Contaminant Levels (MCL) include five individual PFAS and a mixture of four PFAS to account for the combined and co-occurring levels of PFAS in drinking water. Community public water systems, non-transient non-community public water systems, and bottled water suppliers will be required to test for PFAS and report their results to Maine CDC. The rule adopted the federal implementation timeline for public water supplies, which is three years to complete initial monitoring (by 2027), and five years to implement solutions to reduce PFAS if PFAS are reported above certain levels (by 2029). During the implementation timeframe (i.e., 2027 through 2029), and if funding becomes available, the Maine DEP will evaluate the applicability of the MCL to private water supplies that are part of the sludge and septage investigation covered under Public Law 2021, Chapter 478.

For information on the statewide PFAS investigation and funding, please see the January 13, 2023 Status of Maine’s PFAS Soil and Groundwater Investigation at Sludge and Septage Land Application Sites: https://www.maine.gov/tools/whatsnew/attach.php?id=10097293&an=1

For more information on how to calculate the Hazard Index, please see: https://www.epa.gov/system/files/documents/2024-04/pfas-npdwr_fact-sheet_hazard-index_4.8.24.pdf