Contech Filterra® Bioretention
FILTERRA® BIORETENTION
FILTERRA® BIORETENTION
Filterra is similar to bioretention, but has been optimized for high volume/flow treatment and high pollutant removal. Its small footprint allows it to be used on highly developed sites such as landscaped areas, parking lots and streetscapes.
INFORMATION
FEATURES
- High media flow rate (up to 324" per hour)
- Available in multiple configurations and sizes
- No confined space access, and activation is included with the purchase of every system
- Third party field testing confirmed that Filterra meets state regulatory requirements for pollutant removal under TAPE and TARP testing
BRAND
Contech
PRODUCT TYPE
Tree Grills
FILTERRA MEDIA – PROVEN POLLUTANT REMOVAL
At the heart of all Filterra systems is Filterra engineered media; a specified gradation of washed aggregate and organic material homogeneously blended under strict quality controlled conditions. The filter media has been optimized to operate under high flow rates (up to 324 inches/hour) while maintaining pollutant removal performance. Filterra media is tested for hydraulic functionality, fertility, and particle size distribution to ensure uniform performance.
FILTERRA INSTALLATION
We make it easy for you...
- Ongoing maintenance is simple.
- Everything can be accessed from the surface
- Vegetation selection guidance based on your climate zone.
- Activation is included with every system
- No confined space entry required when vegetation specified.
- Clean biofiltration bay with simple landscape tools (rake and shovel).
FILTERRA CONFIGURATIONS
- Filterra Offline
- Filterra Bioscape
- Filterra Peak Diversion
- Filterra Bioscape Valut Basin
- Filterra Bioscape Vault
- Filterra Internal Bypass Curb
- Filterra Sediment Chamber (Maryland only)
BENEFITS
- Value
- Regulatory Compliance
- Simple and easy maintenance
- Adds aesthetic appeal to your site
- Flexibility to meet site-specific needs
- Reduced footprint compared with traditional bioretention
HOW FILTERRA WORKS
Stormwater runoff enters the Filterra system through a curb-inlet opening or pipe and flows through a specially designed filter media mixture contained in a landscaped concrete container. The filter media captures and immobilizes pollutants; those pollutants are then decomposed, volatilized and incorporated into the biomass of the Filterra system’s micro/macro fauna and flora. Stormwater runoff flows through the media and into an underdrain system at the bottom of the container, where the treated water is discharged.
APPEARANCE
Landscaping enhances the appearance of your site making it more attractive while removing pollutants
MAINTENANCE
Filterra offers the most cost effective stormwater treatment system featuring low cost, easy installation and simple maintenance
SELECT FILTERRA APPROVALS
Filterra is approved through numerous local, state and federal verification programs, including:
- Atlanta, GA Regional Commission
- New Jersey Department of Environmental Protection (NJ DEP)
- Texas Commission on Environmental Quality (TCEQ)
- Virginia Department of Environmental Quality (VA DEQ)
- Maine Department of Environmental Protection (ME DEP)
- Los Angeles County, CA - Alternate to Attachment H
- City of Portland, Oregon Bureau of Environmental Services
- North Carolina Department of Environmental Quality (NC DEQ)
- Maryland Department of the Environment - Environmental Site Design (ESD)
- Washington Department of Ecology (GULD) – Basic, Enhanced, Phosphorus, and Oil
DETAIL
Some jurisdictions recognize different removal rates - see your Contech Stormwater Consultant for performance expectations.
- Source : Contech (TAPE) 2024
- Source : Herrera (TAPE) 2009
- 2024 TAPE Results for influent concentrations <100 mg/L
- 2024 TAPE Results for influent concentrations 100-200 mg/L
MEASURED POLLUTANT REMOVAL PERFORMANCE
| POLLUTANT | MEDIAN REMOVAL EFFICIENCY | MEDIAN EFFLUENT CONCENTRATION (MG/L) |
|---|---|---|
| Total Suspended Solids | 87%1 | 8.02 |
| Total Phosphorus (TAPE) | 80% | 0.05 |
| Total Nitrogen | 34% | 0.33 |
| Total Copper | 79% | 0.011 |
| Dissolved Copper | 56% | 0.007 |
| Total Zinc | 70% | 0.04 |
| Dissolved Zinc | 66% | 0.02 |
| Hydrocarbons3 | 87% | 0.71 |
CONFIGURATIONS
FILTERRA OFFLINE
The Filterra Offline configuration is the most economical and simplest Filterra configuration. It utilizes a downstream catch basin or curb inlet for bypass flows allowing for the shallowest profile and most flexible design of any of the Filterra configurations. It is ideal for both new and retrofit projects.
FILTERRA OFFLINE MANHOLE
The Filterra Offline Manhole utilizes a simple pipe connection and can be buried deep, making it ideal for urban or tight areas with limited horizontal space.
FILTERRA PEAK DIVERSION
The Filterra Peak Diversion provides treatment and high-flow bypass in one structure, eliminating the need for an external bypass structure. This configuration also allows for multiple inlet options, including curb inlets, pipe inlets, and grate inlets.
FILTERRA PEAK DIVERSION MANHOLE
The Filterra Peak Diversion Manhole provides treatment and high-flow bypass in one structure, eliminating the need for an external bypass structure. This configuration also allows for pipe inlets and grate inlets.
FILTERRA INTERNAL BYPASS CURB
The Filterra Internal Bypass Curb incorporates a curb inlet treatment chamber and internal high flow bypass in a single structure. This eliminates the need for a separate bypass structure and enables placement in a “sag” or “sump” condition.
FILTERRA SEDIMENT CHAMBER (MARYLAND ONLY)
The Filterra Sediment Chamber includes a pretreatment sediment chamber that provides a settling area for large debris and sediment prior to water entering the media bay.
FILTERRA BIOSCAPE VAULT
The Filterra Bioscape Vault utilizes an open top configuration and downstream catch basin or curb inlet for bypass flows allowing for a shallow profile. Internal Bypass configurations are also available in some locations.
FILTERRA BIOSCAPE
The Filterra Bioscape utilizes all of the Filterra components, but without the concrete structure, allowing for multiple inlets and installation directly into a basin. Bypass is achieved via an upstream structure.
FILTERRA BIOSCAPE VAULT BASIN
The Filterra Bioscape Vault Basin allows for a vault based system to be fully integrated into the landscape. Multiple inlet options are available via the side slopes, including sheet flow. Bypass is typically achieved via an upstream structure.
ADVANTAGES
SOLUTION DEVELOPMENT
Our engineers can review your requirements, weigh all options, and recommend the optimal solution to integrate with your site designs.
ON-SITE ASSISTANCE
Contractors know time is money, so we provide preconstruction meetings, delivery coordination, and on-site installation support to ensure a timely, smooth installation.
TECHNICAL EXPERTISE
Our engineers can assist by providing product specific engineering calculations such as hydraulics, buoyancy, foundation reactions, and unit sizing.
AGENCY/REGULATORY GUIDANCE
Our team is ready to provide you with expert advice and assistance on local regulatory requirements, resulting in faster approvals.
COST ESTIMATES
We can quickly provide engineer’s cost estimates to assist with your solution selection process.
SITE SPECIFIC DRAWINGS
Our engineers can provide site-specific drawings for proposals, project meetings, and submittals, helping you be more efficient with your time.
