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Iron County approves tier and zoning changes after septic-density study
Summary
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.
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.
The move implements recommendations from a 2023 septic-density study and later reviews by county staff and the planning commission; commissioners voted to approve both the tier changes and corresponding zone-map revisions after a public hearing and planning commission recommendation.
County staff said the changes respond to groundwater nitrate sampling and a mass-balance analysis that identified the number of septic systems an area can sustain before modeled nitrate concentrations rise…
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