Arkansas Stormwater-Municipalities regulations & environmental compliance analysis

Arkansas Stormwater-Municipalities: What you need to know

Governing Law and Regulations

Arkansas Water and Air Pollution Control Act (Act), Arkansas Code Annotated (AR Code Ann.) 8-4-101 to 8-4-231

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State administration of the National Pollutant Discharge Elimination System (NPDES) permit program: Arkansas Regulation (AR Reg.) 6.101 to 6.701

Regulatory Agencies

Arkansas Department of Environmental Quality (ADEQ)Water DivisionPermits Branch

U.S. Environmental Protection Agency (EPA)Region 6

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Arkansas is fully authorized by the U.S. Environmental Protection Agency (EPA) to administer and enforce the National Pollutant Discharge Elimination System (NPDES) permit program in Arkansas, including for stormwater discharges associated with municipal separate storm sewer systems (MS4s). Arkansas follows the federal MS4 stormwater permitting requirements, including the stormwater management program requirements. See the national section STORMWATER - MUNICIPALITIES for more information on the MS4 permitting program.

Administration and enforcement. ADEQ's Water Division administers and enforces stormwater discharge permit rules for MS4s in Arkansas.

State Requirements


Operators of large, medium, and regulated small MS4s require authorization to discharge pollutants under a NPDES permit. Regulated small MS4 operators have the option of choosing to be covered by an individual permit, a general permit, or a modification of an existing Phase I MS4's individual permit. Large and medium MS4s must operate under an individual permit.

With the implementation of Phase II of the stormwater regulations, the ...

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