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Nitrogen subcommittee seeks monitoring data to establish baseline loads

Sewage Disposal Working Group · October 30, 2025
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Summary

The nitrogen and environment subcommittee reported it met Oct. 16 and recommended gathering DMR and other monitoring data (subsurface AT, municipal, stormwater) to establish baseline nitrogen loads in the environment; it plans a multi-hour meeting in early November and expects to hear from a Massachusetts expert.

The Sewage Disposal Working Group’s nitrogen and environment subcommittee reported initial work to identify data needed to characterize nitrogen loads from on-site sewage and other sources.

Jim Paris, one of the working-group co-chairs, said the subcommittee met Oct. 16 and that members "generally agreed" DMR data and monitoring for subsurface AT, municipal systems, and stormwater would be valuable to establish a baseline understanding of nitrogen in the environment. Paris said the subcommittee will explore how to obtain that data from D E E P and other sources and will continue fact-finding before outlining recommendations.

Paris said the subcommittee plans a longer meeting in early November to discuss draft regulations and related comments and that it is arranging an expert witness: the former director of a Massachusetts test center who was involved in developing that state’s mass nitrogen program. The transcript records inconsistent start-time reporting for that meeting (the speaker said both "8 p.m." and "8 a.m."); the transcript does not unambiguously record the intended start time, so the exact hour is not specified in this summary.

No formal votes or policy decisions were taken at the meeting; the subcommittee is in a fact-finding stage and will forward findings to the full working group for consideration.