Iron County approves tier and zoning changes after septic-density study

Jul 28, 2025

The Iron County Commission approved a general-plan tier change and matching zone map revisions around the Summit and Newcastle areas after a multi-year septic-density study showed higher groundwater contamination risk from denser septic development.

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The Iron County Commission on Monday approved a pair of amendments to the county general plan and matching zoning changes that shrink urbanizing “tier 3” areas around Summit and Newcastle and rezones surrounding parcels to reduce future septic density.

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