Biofiltration & Bioretention Systems

Modern stormwater management requires more than just containment. It requires natural filtration, infiltration, and pollutant removal that protects downstream ecosystems while meeting regulatory standards.

Whether incorporated into new developments, retrofitted into existing infrastructure, or integrated with other Best Management Practices (BMPs), our systems help clients achieve both regulatory compliance and environmental sustainability.

What Are Biofiltration and Bioretention Systems?

Biofiltration and bioretention systems are advanced stormwater controls that use soil, vegetation, and filtration media to treat runoff before it enters storm drains or natural waterways. As stormwater flows through the system, pollutants like sediment, nutrients, hydrocarbons, and heavy metals are captured or broken down through biological and physical processes.

These systems are often referred to as rain gardens, biocells, or vegetated basins, and they’re recognized by the EPA as approved Post-Construction Best Management Practices (BMPs) under the NPDES framework.

In addition to providing regulatory compliance, biofiltration and bioretention systems:

• Reduce runoff volume and peak discharge rates.
• Improve water quality through filtration and plant uptake.
• Recharge groundwater through infiltration.
• Enhance aesthetics and support green infrastructure goals.

Our Biofiltration & Bioretention Services

Red River Storm Water provides a comprehensive suite of services for biofiltration and bioretention systems covering design, installation, inspection, and maintenance. Every project is tailored to the site’s hydrology, soil characteristics, and performance goals.

System Design & Engineering

Our stormwater specialists develop site-specific designs that balance hydraulic function, infiltration rate, and pollutant removal efficiency. We model anticipated runoff volumes and flow rates to ensure each system performs effectively during major rain events.

Design services include:

• Site analysis and infiltration testing.
• Hydrologic and hydraulic modeling for peak flow management.
• Media composition design (sand, compost, biochar, or proprietary blends).
• Underdrain and overflow configuration for optimal flow-through performance.
• Vegetation selection suited to climate and soil type.

Each design aligns with federal EPA guidelines as well as local post-construction stormwater management standards.

Installation & Construction Oversight

Our certified field teams oversee every phase of system construction to guarantee adherence to design specifications.

• Excavation and grading to achieve designed flow paths.
• Installation of engineered filter media and underdrain systems.
• Placement of geotextiles, erosion control mats, and inlet/outlet structures.
• Planting of native vegetation to stabilize soils and promote nutrient uptake.
• Initial performance inspection and photo documentation for permit verification.

Red River Storm Water ensures your bioretention system not only functions properly but also meets NPDES and local regulatory inspection criteria upon completion.

Maintenance & Performance Monitoring

Like any BMP, biofiltration systems require periodic maintenance to sustain their effectiveness. Sediment accumulation, clogging, and vegetation loss can reduce treatment performance if not addressed. Our maintenance services include:

• Sediment removal and media rehabilitation.
• Replanting and vegetative management to preserve filtration capacity.
• Inspection and cleaning of underdrain structures and overflow weirs.
• Infiltration testing and hydraulic conductivity verification.
• Annual compliance reporting with maintenance logs and photographic records.

These maintenance programs extend the life of your system, reduce liability, and ensure continued compliance with local post-construction permit requirements.

Environmental & Regulatory Benefits

A properly designed biofiltration or bioretention system can dramatically improve site sustainability while fulfilling multiple regulatory obligations simultaneously.

Regulatory Compliance:

• Recognized as approved structural BMPs by the EPA under the NPDES MS4 (Municipal Separate Storm Sewer System) program.
• Satisfies post-construction stormwater treatment mandates in Texas.
• Reduces pollutant loadings to meet Total Maximum Daily Load (TMDL) requirements.

Environmental Advantages:

• Removes up to 90% of total suspended solids (TSS).
• Reduces nitrogen, phosphorus, and heavy metal concentrations.
• Promotes infiltration and groundwater recharge.
• Supports native biodiversity and habitat restoration.
• Provides visually appealing, low-maintenance landscaping features.

By integrating natural and engineered components, biofiltration systems represent the intersection of compliance and conservation – a hallmark of Red River Storm Water’s approach.

Why Red River Storm Water

Red River Storm Water brings two decades of experience designing and implementing green infrastructure solutions that perform under real-world conditions. Our CPESC- and CESSWI-certified professionals understand the technical, environmental, and regulatory dimensions of stormwater control and ensure every installation meets measurable performance targets.

Our clients choose us because we:

• Provide turnkey design, permitting, and construction oversight.
• Tailor system components to each site’s hydrology and soil profile.
• Coordinate directly with engineers, contractors, and regulatory agencies.
• Offer long-term maintenance and inspection programs to protect system integrity.
• Deliver detailed documentation to support post-construction compliance audits.

From planning through operation, we function as a single-source partner for sustainable, compliant stormwater management.

Integration With Broader Stormwater Strategies

Biofiltration and bioretention systems are most effective when integrated into a complete stormwater management framework. Red River Storm Water works with developers, engineers, and municipalities to incorporate these systems alongside complementary BMPs such as:

• Permeable Pavement Systems – for infiltration and load-bearing surfaces.
• Underground Detention Systems – for peak flow control and storage.
• Soil Stabilization and Temporary BMPs – for pre-construction erosion control.
• SWPPP Development and Inspections – for comprehensive site compliance.

This systems-based approach ensures your stormwater infrastructure operates holistically, optimizing both compliance and environmental performance.

Comprehensive Expertise. Local Adaptation.

Every climate and soil type presents unique stormwater challenges. Red River Storm Water designs biofiltration systems that are responsive to local rainfall patterns, infiltration rates, and vegetation zones from arid southwestern conditions to humid southeastern environments.

We stay current with state-specific design manuals and local municipal standards to ensure every installation meets applicable design, inspection, and reporting protocols. Our team delivers consistent, regulation-ready results on every project we approach.

Build Green. Build Compliant.

Biofiltration and bioretention systems represent the future of stormwater management where sustainability meets compliance. Red River Storm Water helps clients adopt these proven, eco-friendly systems to protect water quality, meet permit obligations, and enhance the communities they build in.

If you’re planning a new development or upgrading existing infrastructure, our experts can design and implement a customized filtration system that meets your goals and satisfies every regulatory requirement.

Contact Red River Storm Water today to schedule a consultation or request a proposal for biofiltration and bioretention system design and installation. Together, we’ll help you build clean, compliant, and sustainable stormwater solutions.