Environmental Rules in Mission, TX (2026)
4 verified environmental rules for Mission, Texas, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Mission bans polluted discharges into its MS4 storm sewer system and requires construction sites disturbing an acre or more of land to obtain a permit and file a stormwater pollution prevention plan before breaking ground.
Mission, TX Stormwater Pollution Prevention & MS4 Rules
Some RestrictionsSec. 114-351
It is the policy of the city, and the intent of this article, to reduce pollution and contamination entering the city's separate stormwater sewer system (MS4) to the greatest extent practicable. Discharges to the city's MS4 that cause or contribute to a violation of water quality standards or that fail to protect and maintain the aquatic life use of the Arroyo Colorado are hereby prohibited.
Erosion Control
Construction sites in Mission must control erosion and sediment through a stormwater pollution prevention plan, silt fences, sediment basins, and site stabilization within 14 days of work stopping.
Mission Erosion & Sediment Control at Construction Sites
Some RestrictionsSec. 114-353
For construction sites that will disturb less than one acre of land, the following provisions apply: ... Construction site operators are responsible for retaining all soil and sediment on-site and off of adjacent properties and the public right-of-way. This includes dust control and control of vehicle tracking of dirt off-site. ... Soil and sediment that leaves the construction site must be cle...
Flood Zones
Mission and Hidalgo County participate in FEMA's NFIP. Rio Grande basin creates flood risk. Development in FEMA-designated Special Flood Hazard Areas (SFHAs) requires permits and elevation compliance.
Mission Flood Zone Regulations & Building Rules
Light RestrictionsFEMA Flood Map Service Center - About
The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard information produced in support of the National Flood Insurance Program (NFIP). Use the MSC to find your official flood map, access a range of other flood hazard products, and take advantage of tools for better understanding flood risk. FEMA flood maps are continually updated through a variety of processes. E...
Flood Elevation Requirements
In Mission's FEMA-mapped special flood hazard areas, new and substantially improved homes must have their lowest floor, including basement, elevated to or above the base flood elevation. Mission adds no freeboard above BFE, and a registered surveyor, engineer, or architect must certify the elevation.
Mission, Texas Floodplain: Lowest Floor Elevated to Base Flood Elevation
Some RestrictionsMission, TX Code of Ordinances § 38-62(1)
Residential construction. New construction and substantial improvement of any residential structure shall have the lowest floor (including basement) elevated to or above the base flood elevation. A registered professional engineer, architect, or land surveyor shall submit a certification to the floodplain administrator that the standard of this subsection as proposed in subsection 38-43(a)(1) i...
Looking for Hidalgo County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Mission city rules.
Environmental Rules in Hidalgo County →