Environmental Rules in Kauai County, HI (2026)
4 rules for unincorporated Kauai County, Hawaii.
Verified from official government sources
Stormwater Management
Kaua'i County regulates stormwater and drainage through its Drainage Ordinance, Kaua'i County Code Article 16 of Chapter 22, which adopts the County's Stormwater Runoff System Manual by reference. The Department of Public Works' County Engineer reviews drainage plans, and discharging pollutants or effluent into a drainage facility without approval is a violation with fines up to $25,000.
Kaua'i County Drainage Ordinance Rules
Some RestrictionsKaua'i County Code §§ 22-16.1, 22-16.9(a)
The purpose of this Article is to provide drainage principles and policies as set forth in the Stormwater Runoff System Manual dated July 2001, and to safeguard the public health and safety, and to protect property in the County of Kaua'i. ... (a) No person shall discharge any effluent other than stormwater runoff onto any public right-of-way and/or into a drainage facility without the approval...
Erosion Control
On Kaua'i (Kaua'i County), the Sediment and Erosion Control Ordinance (County Code Article 7) requires anyone grading, grubbing or stockpiling material to use best management practices such as drainage controls, dust suppression and stabilized ground cover. Disturbed sites idle for 21 days or more must be grassed or graveled within 14 days of the last disturbance, regardless of permit status.
Erosion and Sediment Control on Kaua'i
Some RestrictionsKaua'i County Code § 22-7.5
Regardless of whether a permit is required pursuant to this Article, or an exemption from Sec. 22-7.6 is applicable, all grading, grubbing and stockpiling activities shall incorporate BMPs to the maximum extent practicable to prevent damage by sedimentation to streams, watercourses, natural areas and the property of others. It shall be the permittee's and the property owner's responsibility to ...
Flood Zones
Kaua'i County Code Article 1 of Chapter 15 bars any construction or land alteration in flood-prone areas without full compliance with the county's Floodplain Management Ordinance. The County Engineer must approve building, grading, and subdivision permits in special flood hazard areas before they issue, and violators face misdemeanor fines and forced abatement.
Floodplain Development Rules on Kaua'i
Some RestrictionsKaua'i County Code §§ 15-1.2(c), 15-1.4(a), 15-1.9(a)
Compliance. ... No structure or land shall hereafter be constructed, located, extended, converted, or altered without full compliance with the terms of this Article and other applicable regulations. ... No building permit, certificate of occupancy, or grading permit shall be issued or subdivision shall be approved without the approval of the County Engineer or his/her authorized representative,...
Flood Elevation Requirements
On Kaua'i (Kaua'i County), Chapter 15, Article 1, Floodplain Management, Section 15-1.5 requires new construction and substantial improvements of residential structures in AE, AO, AH and A1-30 flood zones to have the lowest floor, including any basement, elevated to or above the base flood level; manufactured homes must clear that elevation by an extra foot.
Kaua'i Flood Elevation Rule for New Construction
Some RestrictionsKaua'i County Code § 15-1.5(a)(3)(A), (C)
§ 15-1.5. Construction and Development Standards. ... (a) Flood Fringe. ... The flood fringe areas are identified on the FIRMs as AE, AO, and AH zones. ... (3) Elevation and Floodproofing. (A) Residential Structures. All new construction, repetitive loss structures, and substantial improvements of residential structures within Al-30, AE, AO, and AH zones on the community's FIRM shall have the l...
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