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Lawmakers hear science and concern as S.218 aims to curb salt pollution in Vermont streams
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Summary
Supporters and DEC staff told the Senate committee that S.218 would establish voluntary certification, reporting and incentives to reduce chloride use from private applicators, addressing stream impairments and TMDL development in small, highly impervious watersheds.
Supporters of S.218 and staff from the Department of Environmental Conservation told the Senate Natural Resources & Energy committee that chloride (road salt) is contributing to stream and aquatic biota impairments in many small, developed watersheds and that S.218 would create voluntary best management practices, certification and incentives to reduce private applicator use.
Jared Carpenter, representing proponents of the bill, described S.218 as the successor to prior proposals (H.319) with similar structure: establishing best management practices, creating commercial and municipal applicator certification, and including liability protections shifted to an affirmative defense. “The bill is a great step forward in addressing this problem,” Carpenter said.
Bethany Sargent, manager of DEC’s Monitoring and Assessment Program, presented statewide monitoring data showing elevated chloride concentrations most often in small watersheds with high impervious cover. She noted Vermont is entering a 2026 listing cycle and expects to add additional chloride‑impaired waters such as Stevens Brook and St. Albans. DEC has completed a chloride TMDL for Sunnyside Brook (approved in 2024) and is developing additional TMDLs; these TMDLs provide loading targets but do not by themselves allocate chloride amounts to private applicators.
Sargent said the regulatory gap S.218 addresses is private, non‑municipal application (parking lots, private contractors) where there is currently limited ability for the state to require optimization or to track quantities applied. DEC supports the proposed voluntary program as a first step that can incentivize optimization and reporting, and she described permit‑based requirements (MS4 and MS4‑related municipal permits) that already compel reduction plans for municipal and transportation agency applications in impaired waters.
Committee members asked about measurement, enforcement and timelines for additional TMDLs. DEC explained that continuous conductivity monitoring and flow records are used to estimate loads and that TMDLs proceed from monitoring to load targets, public notice and EPA submission. DEC emphasized that optimization and education can reduce chloride use even before allocation‑level requirements are in place.
Next steps: the committee indicated it plans limited additional testimony and expects to schedule a vote on S.218 in the coming days.
