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Falmouth outlines offshore outfall plan, EIR schedule and anti‑degradation sampling results
Summary
DPW staff described a proposed tertiary‑treated outfall 2,300 feet offshore, a two‑year anti‑degradation sampling program, and modeling work; staff said the outfall plus expanded sewering is expected to yield a net nitrogen reduction of more than 12,000 kg/year but additional evaluations (DO, pH, disinfection) remain.
Amy Lowell, the water superintendent, presented the town's conceptual outfall plan, anti‑degradation evaluation and permitting timeline.
Lowell said the proposed outfall would discharge tertiary‑treated wastewater with ultraviolet disinfection about 2,300 feet south of Grama Tides in Nantucket Sound, beyond the 20‑foot depth contour and beyond eelgrass habitat. The town completed a two‑year sampling program in 2024–2025 to support an anti‑degradation evaluation and is preparing a draft environmental impact report (EIR) for submission to MEPA this spring.
The presentation showed that relocating the…
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