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Bill Summary · HB 381

HB 381 — On‑Site Wastewater System Amendments (North Carolina, 2025 session) — Summary

Purpose
- Modernize the statutes governing on‑site subsurface wastewater systems to (1) clarify definitions and inspection roles, (2) allow broader use of advanced pretreatment technologies in engineered designs, and (3) create a clearer, faster approval pathway for certain advanced/innovative treatment systems that have already been certified under nationally recognized protocols.

Key provisions
- Definitions (amends G.S. 130A‑334)
- Adds and clarifies terms including “advanced pretreatment,” “approved special inspector,” “approved agency for special inspection,” “construction observation,” “engineered option permit,” and confirms “advanced pretreatment” may be part of ground absorption systems.
- “Advanced pretreatment” is defined to include biological, chemical, and physical processes (e.g., aeration, clarification, filtration, disinfection).

  • Professional engineer discretion (amends G.S. 130A‑336.1(e)(1))

    • Authorizes the professional engineer who designs a system to employ advanced pretreatment technologies even if those technologies are not yet approved by the State, provided the design uses recognized engineering principles and applicable Commission rules.

  • Classification, permit validity, and conditions (amends G.S. 130A‑335(f))

    • Confirms the Commission/local boards must set construction, operation, monitoring, maintenance, reporting, ownership, and advanced pretreatment requirements.
    • Restates permit validity rules (e.g., improvement permits tied to unaltered site/flow; plat‑based improvement permits may be valid without expiration; site‑plan improvement permits may remain valid for five years).

  • Innovative system approval pathway (amends G.S. 130A‑343(g)(3))

    • If an advanced pretreatment system has been evaluated/approved under a nationally recognized certification body’s protocol for at least two consecutive years and found to perform acceptably, the Department must approve it as an “innovative wastewater system” provided the Department verifies (i) the certification body’s approval and (ii) that the proposed design and installation match the certified system.
    • Multiple committee drafts add explicit language requiring the Department to issue approvals consistent with Commission rules upon that verification.

Who is affected
- Manufacturers of advanced/on‑site wastewater systems (provides an alternative route to state innovative approval when national certification exists).
- Licensed professional engineers (expanded discretion to use advanced pretreatment in designs).
- Local health departments and the NC Department of Health and Human Services (responsible for verification, permits, special inspections, and ongoing oversight).
- Installers, special inspectors, and property owners who rely on on‑site wastewater systems.

Procedural / timeline notes
- Bill amends multiple sections of Article governing on‑site wastewater (G.S. 130A‑334, ‑335, ‑336.1, and ‑343).
- Enactment language in versions indicates the act becomes effective when it becomes law and applies to innovative system applications filed on or after that date. Check the legislature’s bill status for final effective date and current posture.

Potential impacts / considerations
- Expected benefit: a streamlined route for promoting adoption of advanced pretreatment technologies that have demonstrated performance elsewhere, potentially accelerating deployment of higher‑performance systems statewide.
- Administrative impact: the Department and local health departments will assume verification responsibilities; they may need procedures to review and confirm national certification conformance.
- Public health/environmental: broader use of advanced pretreatment could improve effluent quality and groundwater protection but will depend on consistent oversight, approved inspection protocols, and appropriate operation/maintenance requirements.

Compiled from official sources — confirm details with the bill’s official record.

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