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Barnstable County launches ARPA‑funded pilot to test private wells for PFAS; 270 free analyses available
Summary
An ARPA‑funded pilot will provide up to 270 free private‑well analyses across Barnstable County to collect baseline data on PFAS and other drinking‑water parameters; the program is voluntary, will pre‑screen applicants, and sets reporting thresholds and DEP notification procedures for high results.
Barnstable County detailed an ARPA‑funded private‑well testing pilot on May 28 designed to collect baseline water‑quality data across the Cape and to provide free testing to a limited number of volunteer households.
Katie O’Neil, shared‑services program manager, and Bill Phelps of Tetra Tech described the program mechanics, goals and data‑handling procedures. O’Neil said the project evolved into a broader baseline study that now tests about 11 parameters and is intended to inform outreach, remediation planning and potential follow‑up investigations. "This project is funded through ARPA... it's a volunteer program and would save residents about $450 on the test," she told commissioners.
Program scope and process
- Sample availability and target population: The pilot initially allotted 300 sample slots but held back 10% (about 30) for QA/QC resampling, leaving 270 analysis slots available for distribution to towns. The county noted an estimated 14,000 private wells across Cape Cod; participation is voluntary and based on town allocations and a sign‑up process.
- Logistics and laboratory: County staff worked with Tetra Tech on outreach materials, phone support and a web sign‑up. Tetra Tech will coordinate sampling logistics, couriers and town‑level pickup days to avoid overloading laboratory capacity. The county lab will receive and analyze the samples; staff stressed chain‑of‑custody and sample holding‑time procedures.
- Data handling and privacy: The county and Tetra Tech said identifying addresses would not be posted publicly; results will be shared with homeowners and town health agents. Presenters noted that test results could still fall under public records law and that the program will anonymize published maps (owner data replaced with coded identifiers) unless otherwise required by statute or DEP action.
PFAS thresholds and DEP involvement
- PFAS reporting thresholds: Presenters said a PFOS/PFAS reportable level of 20 parts per trillion (ppt) would prompt follow‑up and that an "imminent hazard" threshold (discussed as 90 ppt in the presentation) would trigger DEP involvement. In imminent‑hazard cases, DEP may install point‑of‑entry treatment at a home and may provide operation and maintenance for a limited period.
- Follow‑up: The county will coordinate with municipal health agents and DEP in cases that require regulatory notification or further investigation; Tetra Tech and county staff intend to use aggregated results to identify potential plumes or neighborhood patterns.
Enrollment, communication and schedule
- Enrollment: Residents will sign up through a web portal (a QR code on recruitment flyers) or by phone; towns receive allocated slots and the county may adjust allocations based on response.
- Outreach: Materials include a recruitment flyer, web sign‑up, translated support materials and a dedicated phone line and email for questions.
Ending
County leaders said the pilot is intended to produce a baseline dataset to guide targeted outreach and future work; commissioners asked for mid‑point and final briefings so the board and towns can evaluate whether to expand or sustain testing.
