Environmental Rules in Casa Grande, AZ (2026)
4 verified environmental rules for Casa Grande, Arizona, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
In the City of Casa Grande it is unlawful to discharge any pollutant into the municipal storm drain system or watercourses, and illicit connections to the MS4 are prohibited outright. The Public Works Director enforces Chapter 18.08, with criminal penalties for violations.
Casa Grande Stormwater Discharge Prohibitions
Some RestrictionsCasa Grande Municipal Code §§ 18.08.060, 18.08.200
18.08.060 Discharge prohibitions. ... A. Prohibition of Illegal Discharges. No person shall discharge or cause to be discharged into the municipal storm drain system or watercourses any materials, including, but not limited to, pollutants or waters containing any pollutants that cause or contribute to a violation of applicable water quality standards. ... ... C. Prohibition of Illicit Connectio...
Erosion Control
In the City of Casa Grande, any land-disturbing activity uncovering one acre or more, or a smaller parcel that is part of a common plan of development, needs a site development permit and an approved SWPPP with specific erosion and sediment control measures under Chapter 18.12.
Casa Grande Construction Erosion Control Permit
Some RestrictionsCasa Grande Municipal Code §§ 18.12.020, 18.12.050, 18.12.070
18.12.020 Permits. ... A. No person shall be granted a site development permit for land-disturbing activity that would require the uncovering of one or more acres of land, or which will disturb less than one acre that is part of a common plan of development, without the approval of a SWPPP by the city. ... 18.12.050 Design requirements. ... D. Erosion control requirements shall include the foll...
Flood Zones
The City of Casa Grande prohibits any development inside a special flood hazard area (SFHA) unless a SFHA development permit is first obtained from the floodplain administrator under Casa Grande Municipal Code § 15.40.730. The permit must be secured before construction begins, including manufactured home placement, and covers any SFHA established under Section 15.40.580. Violating the permit requirement is a Class 2 misdemeanor.
Casa Grande SFHA Development Permit Requirement
Some RestrictionsCasa Grande Municipal Code § 15.40.730
A. It is unlawful for any person to engage in any development within a SFHA without securing a SFHA development permit. Any violation of this section shall be subject to prosecution as a Class 2 misdemeanor in accordance with subsection 15.40.705.B. B. A SFHA development permit shall be obtained before construction or development begins, including placement of manufactured homes within any ...
Flood Elevation Requirements
Casa Grande Municipal Code § 15.40.460 sets the City's freeboard standard: the 'regulatory flood elevation' is one foot above the FEMA base flood elevation. Section 15.40.750 then requires new or substantially improved residential structures in flood hazard Zones AO, A, and AE to have their lowest floor built to or above that regulatory flood elevation, with alternative methods for AO and undetermined-elevation A Zones.
Casa Grande Base Flood Elevation Freeboard Rule
Some RestrictionsCasa Grande Municipal Code §§ 15.40.460, 15.40.750
“Regulatory flood elevation” means an elevation one foot above the base flood elevation. ... ... A. Residential construction, new or substantial improvement, shall have the lowest floor, including basement: 1. In an AO Zone, elevated to or above the regulatory flood elevation, or elevated at least two feet above the highest adjacent grade if no depth number is specified; 2. In an A Zone where a...
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