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Barnstable County clean-water update: costs rise; Aqua Fund lending and IA systems scale up

Barnstable County Board of Regional Commissioners · April 23, 2026
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Summary

County Clean Water Center staff reported rising construction and sewage-replacement costs, growth in Aqua Fund loans and expanded on-site (IA) system deployment and management tools, and described a county septic-utility program and workforce training to support large-scale nitrogen-reduction efforts.

Brian Baumgartel, director of Barnstable County's Clean Water Center, told commissioners that the Cape's wastewater challenge and inflation have pushed earlier cost estimates higher and that the county is expanding financing and management tools to help towns and homeowners.

Baumgartel said original sewering estimates of $4.2 billion to $6.2 billion become about $6.2 billion to $9.2 billion when adjusted for construction-price inflation; a hybrid approach that mixes sewering and advanced on-site (IA) technologies rises to roughly $2.8 billion to $5.4 billion. He said modern IA systems targeted at nitrogen removal are…

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