Mississippi Administrative Code Title 11 - Mississippi Department of Environmental Quality

Title 11 – Mississippi Department of Environmental Quality (Miss. Admin. Code):

🏛️ Code Structure Overview

Title 11 is divided into nine parts, each covering major regulatory domains under the Mississippi Department of Environmental Quality (MDEQ):

Part 1 – Administrative Regulations

Part 2 – Bureau of Public Water Supply

Part 3 – Hazardous Waste Management Regulations

Part 4 – Nonhazardous Solid Waste Management Regulations

Part 5 – Underground Storage Tank Regulations

Part 6 – Wastewater Pollution Control Regulations

Part 7 – Surface Water & Groundwater Use, Well Contractors & Dam Safety

Part 8 – Geology Regulations

Part 9 – Pollution Emergency Response Regulations mdeq.ms.gov+5regulations.justia.com+5law.cornell.edu+5

🔍 Selected Highlights by Part

Part 1 – Administrative Regulations

Chapter 1: Delegation of Authority
The Mississippi Commission on Environmental Quality (MCEQ) may delegate its powers—such as issuing orders, hiring staff, and managing waste protection—to the Executive Director of MDEQ. These delegations rely on statutory authority under Miss. Code Ann. § 49‑17‑17(o) & (n) 

Part 2 – Bureau of Public Water Supply

Covers standards for potable water provision, licensing of well contractors, dam safety, and groundwater management. Includes Chapter 11, which stipulates reporting requirements for nitrogen oxide and VOC emissions in nonattainment areas—statements due by July 1 annually

Part 3 & 4 – Waste Management

Focus on regulation of hazardous and nonhazardous solid waste, including disposal standards, facility permitting, and enforcement frameworks. (Less detail in initial sources.)

Part 5 – Underground Storage Tanks

Provides technical specifications and spill prevention requirements to protect soil and groundwater.

Part 6 – Wastewater Pollution Control (NPDES and UIC)

Chapter 1: National Pollutant Discharge Elimination System (NPDES), Underground Injection Control (UIC), and state permit issuance.

Chapters 2–3: Water quality criteria for inland/coastal waters and operator certification standards.

Chapters 4–7: Revolving loan fund programs for wastewater infrastructure projects and annual impaired waters listing regulations.justia.com.

Parts 7–9

Part 7: Licensing for well drilling, dam safety oversight, and groundwater allocation.

Part 8: Geological surveys and energy resource regulations.

Part 9: Emergency response procedures for pollution incidents.

📄 Example Provisions from Air Quality Regulation (Part 2, Chapter 1)

Defines “ambient air”, “de minimis NSR modification”, “major/minor stationary source”, etc.

Establishes permitting criteria, public participation, and air pollution emergency episode actions (alert, warning, emergency levels)

✅ Summary Table

PartChapter(s)Focus Area
11Delegation to MDEQ Executive Director
21–11Air emissions, emergency response, public participation in air permitting
3–4Hazardous & solid waste management
5Underground storage tank standards
61–9Wastewater & water quality, NPDES/UIC, funding support
7Well contractors, dam safety, groundwater
8Geology and energy resource regulation

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