Environmental Rules in Gilbert, AZ (2026)
2 verified environmental rules for Gilbert, Arizona, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Gilbert enforces stormwater management through Ordinance 1590 and the Arizona Pollutant Discharge Elimination System (AZPDES). Construction sites disturbing one acre or more must obtain coverage under the construction general permit. The Sonoran Desert environment makes stormwater retention critical due to flash flood risks from monsoon storms. Gilbert requires on-site retention for new development to manage runoff.
Gilbert Stormwater Management Rules
Heavy RestrictionsTown of Gilbert Ordinance 1590 (Aug. 3, 2004); Gilbert Municipal Code Chapter 30-54
Municipal Separate Storm Sewer (MS4) Permit. The Clean Water Act (CWA), among other things, regulates stormwater and urban runoff to protect water quality. The Phase II Final Rule requires small municipal separate storm sewer systems (MS4s) such as Gilbert to obtain a National Pollutant Discharge Elimination System (NPDES) permit which specifies the measures that will be taken to prevent pollut...
Erosion Control
The Town of Gilbert lets developers start preliminary on-site grading before their improvement plans are fully approved, but only under an At-Risk Grading Permit issued by the Development Engineering Manager. All early work is done entirely at the applicant's own risk and expense under Land Development Code Chapter 3 § 1.5.
Gilbert At-Risk Grading Permit Rules
Some RestrictionsGilbert Land Development Code, Chapter 3 § 1.5.3
1.5.3 At-Risk Grading Permit; Fees A. Scope. An at-risk grading permit granted under this Section shall only authorize a permittee to begin moving dirt and begin preliminary onsite grading work prior to the actual permits for the improvement plans being issued. B. At Risk. Early work that occurs prior to final approval of the plans is done entirely at the risk and expense of the permittee. If c...
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