ARState-AdministeredSWPPP Requirements in Arkansas
Arkansas administers its construction stormwater program through the Arkansas Division of Environmental Quality (ADEE, formerly ADEQ) under the ARR150000 general permit. The program is operator-friendly—$0 fees, online NOI submission, and a permit structure that closely tracks the federal CGP without significant additional requirements. Arkansas's relatively flat Delta region and the rolling Ozark and Ouachita highlands create two distinct construction environments with different erosion challenges. The Arkansas River and its tributaries drain a large portion of the state into the Mississippi River system, creating downstream water quality obligations that ADEE monitors carefully. The state's Extraordinary Resource Waters and Natural and Scenic Rivers designations add buffer and discharge restrictions for projects in those watersheds. Contractors in the Fayetteville/Northwest Arkansas metro area—one of the fastest-growing regions in the South—should confirm local municipal stormwater requirements, which often exceed the state ARR150000 baseline.
Arkansas SWPPP Key Facts
- ✓ARR150000 permit administered online through ADEE's permitting portal—$0 fee
- ✓Agency recently reorganized from ADEQ to ADEE; permit references may show either abbreviation
- ✓Extraordinary Resource Waters (ERW) and Natural and Scenic Rivers designations impose additional discharge restrictions
- ✓Ecologically Sensitive Waterbodies (ESW) classification adds buffer and BMP requirements beyond the standard permit template
- ✓Northwest Arkansas metro (Fayetteville/Bentonville) has significant construction activity with local MS4 requirements on top of state permit
- ✓Arkansas River and Mississippi tributaries receive heightened ADEE compliance attention due to downstream water quality obligations
- ✓Rain event inspection threshold is 0.5 inches in 24 hours — consistent with many southeastern states
- ✓Arkansas's red clay soils (particularly in the Ozark foothills) mobilize quickly and are highly visible in receiving waters
Administering Agency
- Agency
- Arkansas Division of Environmental Quality (ADEQ / ADEE)
- Phone
- 501-682-0744
- adeq@adeq.state.ar.us
Permit Details
- Permit Name
- NPDES General Permit for Stormwater Discharges from Construction Activities
- Permit Number
- ARR150000
- Effective Date
- 2018-07-01
SWPPP Thresholds & Triggers
- Acreage Threshold
- 1 acre of land disturbance, or less than 1 acre if part of a larger common plan of development
Projects within the Extraordinary Resource Waters (ERW) or Ecologically Sensitive Waterbodies (ESW) categories face stricter discharge limitations. The Arkansas Natural and Scenic Rivers system includes additional buffer protections.
Inspection Requirements
- Inspection Frequency
- At least once every 7 calendar days and within 24 hours of a qualifying storm event of 0.5 inch or more
- Rain Event Threshold
- 0.5 inch in a 24-hour period
- Certified Inspector
- Not required by state
Arkansas uses an online permitting system for NOI and NOT submissions. ADEQ was reorganized into the Arkansas Division of Environmental Quality (ADEE) in recent years—permit forms and portal URLs may still reference both names during the transition period.
Penalties & Enforcement
- Max Civil Penalty (Per Day)
- $10,000 per day per violation (state); federal enforcement up to $25,000/day
- Criminal Penalties
- Criminal penalties under Arkansas Water and Air Pollution Control Act for knowing violations
ADEQ/ADEE conducts routine inspections and responds to complaints. The Arkansas River and Mississippi River tributaries receive heightened attention due to downstream water quality obligations.
Permit Fees
- NOI Filing Fee
- $0
- NOT Filing Fee
- $0
How Arkansas Differs from Federal Requirements
- ⚠Arkansas's ARR150000 permit closely mirrors the federal CGP with no significant additional technical requirements beyond the federal baseline.
- ⚠State maximum civil penalty ($10,000/day) is lower than the federal CWA maximum ($25,000+/day)—federal EPA can escalate enforcement independently.
- ⚠$0 NOI fee in Arkansas vs. potential processing fees under the direct federal CGP in non-authorized states.
- ⚠Extraordinary Resource Waters and Ecologically Sensitive Waterbodies classifications impose Arkansas-specific antidegradation protections not present in the federal CGP.
- ⚠Arkansas Natural and Scenic Rivers Act buffer requirements are state-specific protections that exceed federal CGP guidance for stream-adjacent construction.
SWPPP Tips for Arkansas
- ➤Check whether your project falls within an Extraordinary Resource Waters watershed before submitting your NOI—additional BMPs may be required that are not in the standard ARR150000 template.
- ➤Northwest Arkansas contractors must check local MS4 permits for Fayetteville, Bentonville, Springdale, and Rogers—these cities have requirements that exceed the state general permit.
- ➤Keep SWPPP amendment records current; ADEE inspectors frequently cite outdated SWPPPs as the primary deficiency on construction sites.
- ➤The agency's transition from ADEQ to ADEE branding means older permit documents and some forms may still reference ADEQ—both are valid during the transition period.
- ➤For projects in the Ozark Highlands, design BMPs for steep karst terrain — sinkholes and losing streams can carry sediment directly to underground aquifers without surface filtration.
- ➤Arkansas's spring tornado and severe storm season (March–May) can damage BMPs overnight. Include a severe weather response protocol in your SWPPP.
Arkansas SWPPP FAQs
Is ADEQ now called ADEE in Arkansas?+
Yes. The Arkansas Department of Energy and Environment (ADEE) absorbed the former Arkansas Department of Environmental Quality (ADEQ). The Division of Environmental Quality within ADEE continues to administer water quality permits including the ARR150000 construction stormwater general permit.
Does Arkansas have additional requirements for sites near rivers?+
Yes. Projects near Arkansas Extraordinary Resource Waters (ERW), Ecologically Sensitive Waterbodies (ESW), or Natural and Scenic Rivers face stricter discharge limitations under the ARR150000 permit. Identify receiving water classification before preparing your SWPPP.
Are there local stormwater permits in addition to the state general permit?+
Yes in many cases. Cities with MS4 permits—including Fayetteville, Little Rock, Fort Smith, and others—may have local grading or stormwater management ordinances that are more stringent than ARR150000. Always check with the local municipality before breaking ground.
How do I submit an NOI for a construction project in Arkansas?+
Submit your NOI electronically through ADEE's online permitting portal. There is no filing fee. Allow several business days for processing and confirmation. You must have permit authorization before any land disturbance begins.
What is the difference between ERW and ESW water body classifications in Arkansas?+
Extraordinary Resource Waters (ERW) are Arkansas's highest-quality water bodies with enhanced antidegradation protections — they cannot accept new or increased pollutant loading. Ecologically Sensitive Waterbodies (ESW) support unique aquatic communities that could be harmed by water quality degradation. Both classifications impose stricter SWPPP requirements beyond the standard ARR150000 template.
Does Arkansas have karst geology concerns similar to Missouri?+
Yes. The Ozark Plateau extends into northwestern Arkansas with extensive cave and spring systems, sinkholes, and losing streams. Sediment entering a sinkhole can travel directly to a spring miles away without surface filtration. SWPPPs for Ozark Arkansas sites should identify all karst features within and adjacent to the project area and install protective BMPs at sinkhole margins.
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