Stormwater Treatment
Water quality requirements are tightening with every permit cycle. Jensen helps you stay ahead with proven stormwater treatment systems backed by verified removal performance, NJDEP certification, and TAPE approval. Our solutions are designed to help projects move through review with confidence, not guesswork. And because Jensen manufactures treatment, detention, and conveyance products, you get a complete stormwater system from one trusted partner.
The Complete Treatment Train
Stormwater treatment is not one-size-fits-all. Sediment, oils, metals, trash, and nutrients behave differently, which means each pollutant requires the right treatment strategy. Jensen engineers complete treatment trains that pair upstream pretreatment with separation, filtration, and biofiltration to deliver the level of performance your permit demands.
From NPDES Phase II and MS4 requirements to state general permits and site-specific SWPPPs, we design each system around your site conditions, pollutant profile, and approval pathway, giving you a coordinated stormwater solution from one trusted partner.
01
Pretreatment
Gross solids removal
02
Separation
Sediment & oils
03
Filtration
TSS, metals, nutrients
04
Biofiltration
Advanced polishing
01
Pretreatment
Gross solids removal
02
Separation
Sediment & oils
03
Filtration
TSS, metals, nutrients
04
Biofiltration
Advanced polishing
Stormwater treatment, detention, and pump station systems need to work together. Because Jensen builds them all, your treatment train and storage system are engineered as a complete, coordinated solution from one partner.
How Stormwater Treatment Works
Stormwater treatment works by capturing and cleaning runoff before it reaches receiving waters. As stormwater flows through a treatment system, sediment settles out, trash and floatables are screened, oils and hydrocarbons are separated, and finer pollutants can be removed through filtration or biofiltration. The right treatment train matches these processes to the site’s pollutant profile, flow rates, and permit requirements.
Pretreatment
Upstream screening devices that capture trash, debris, and gross solids before they reach downstream treatment systems. Jensen pretreatment solutions help protect the full treatment train, improve long-term performance, and simplify maintenance.
Pretreatment
Upstream screening devices that capture trash, debris, and gross solids before they reach downstream treatment systems. Jensen pretreatment solutions help protect the full treatment train, improve long-term performance, and simplify maintenance.
Filtration
Engineered filtration systems use specialized media to capture fine sediment, TSS, metals, and nutrients that pass through upstream treatment. Jensen filtration solutions provide targeted pollutant removal with NJDEP-verified performance, helping projects meet water quality requirements with confidence.
Separation
Hydrodynamic separation systems use controlled vortex flow to settle sediment and separate oils, floatables, and other pollutants from stormwater runoff. Jensen separation solutions deliver effective treatment with low head loss and a compact footprint, making them well suited for space-constrained sites and integrated treatment trains.
Biofiltration
Biofiltration systems use engineered soil media, vegetation, and natural biological processes to provide advanced stormwater treatment. Jensen biofiltration solutions help remove fine sediment, nutrients, metals, and other pollutants while supporting permit-driven water quality compliance.
Products
Jensen Deflective Separator
Certified for Full Trash Capture by the California Water Board, the JDS uses non-clogging screening and separation to remove trash, floatables, sediment, debris, and hydrocarbons with minimal head loss. Compact, efficient, and easy to maintain, the JDS is built for highperformance treatment in space-constrained urban environments.
AtlanFilter
NJDEP Certified media filtration for TSS, metals, and nutrients. AtlanFilter’s modular cartridge design scales to match project flow rates, while active backwash helps maintain treatment performance and simplifies long-term maintenance.
Biofiltration
Engineered bioretention optimized for high flow rates and pollutant removal. Combines natural treatment processes with precast reliability and consistent performance. Meets LID and green infrastructure requirements.
Baffle Box
City of Sacramento-approved, volume-based treatment in a baffled precast vault. The Jensen Baffle Box captures the water quality volume, promotes low-velocity settling, and removes sediment, trash, debris, oils, and floatables while helping attenuate peak flows.
ZeroTrash Baffle Box
ZeroTrash uses screening and baffled separation to capture trash, debris, gross solids, sediment, and floatables. Above-water debris storage helps reduce nutrient leaching and simplify maintenance, making it a compact, high-performance solution for pretreatment and full trash capture applications.
Caltrans Capture Housing
A patented Caltrans stormwater trash capture structure designed for roadway and transportation drainage systems. The Caltrans Capture Housing uses non-clogging wedge wire screening to capture trash and debris while maintaining hydraulic performance, supporting full trash capture compliance in compact, retrofit-friendly applications.
Coalescing Separator
Enhanced oil-water separation using oleophilic coalescing media that captures and combines oil droplets for efficient removal. Modular plates also support solids settling, lowmaintenance cleanout, and flexible integration into new or existing separator systems.
Diversion Structure
Precast structures designed to route stormwater to treatment, detention, or bypass systems while controlling flow split and hydraulic loading. Jensen diversion structures help integrate the full stormwater system with durable, project-specific performance.
SurgeFlow
An upflow stormwater filtration system that routes runoff through engineered media for targeted pollutant removal. SurgeFlo combines settling, filtration, and precast reliability in a compact system designed for efficient installation and maintenance.
Catch Basin Filters
A California Water Board Full Trash Capture-approved inlet filter that captures trash, debris, gross solids, and floatables at the catch basin. Full stainless steel construction provides durable, corrosion-resistant performance for municipal, roadway, and urban drainage applications.
Tested. Certified. Approved.
01
NJDEP Certified
Lab verified removal efficiencies under the New Jersey DEP protocol – the national benchmark for treatment device certification.
02
TAPE Approved
Washington State TAPE certification based on field verified treatment performance under real-world conditions.
03
CA Water Board
Certified Full Trash Capture treatment systems designed to capture 100% of trash, debris, and gross solids before discharge. Down to 5 mm.
How to Get Started
You have your workflow.
We fit into it, not the other way around.
01
Request Sizing
Share your hydrology data and storage requirements. Our engineers will size a system and return a preliminary layout.
02
Get Drawings Fast
Tell us your site constraints. We’ll turn around project-specific drawings in days, not weeks.
03
Engineering Review
We’ll review your design, confirm hydraulic calcs, verify agency compliance, and provide stamped submittals.
04
Installation Support
From delivery coordination to on-site technical support, we stay with your project through final inspection.
Complete Your System
Most projects need more than one solution. A detention system works best with pretreatment upstream, filtration downstream, and conveyance tying it all together. Add a pump station for reuse or lift applications.
01
Conveyance In
RCP Box Culvert
02
Pretreatment
JDS Catch Basin
03
Detention
StormVault
04
Treatment
Filter Biofiltration
05
Pump Station
Reuse Lift
06
Discharge
Storm drain Infiltrate
01
Conveyance In
RCP Box Culvert
02
Pretreatment
JDS Catch Basin
03
Detention
StormVault
04
Treatment
Filter Biofiltration
05
Pump Station
Reuse Lift
06
Discharge
Storm drain Infiltrate
Every component above is engineered and manufactured by Jensen.
Detention
Manage Stormwater Storage
Underground vault and chamber systems for detention, retention, and infiltration. Manage peak runoff, meet storage mandates, and maximize buildable land.
Detention
Manage Stormwater Storage
Underground vault and chamber systems for detention, retention, and infiltration. Manage peak runoff, meet storage mandates, and maximize buildable land.
Conveyance
Move Water Efficiently
Reinforced concrete pipe, box culvert, and drainage structures manufactured at Jensen plants across the West for fast, local delivery.
Pump Stations
Optimize Water Flowrate
Precast pump stations for stormwater reuse, lift applications, and sites where gravity discharge isn’t feasible.
Engineering Support
Get specs, drawings, or application support from our engineering team.
Take the next step.
Talk with a Jensen expert to find the right solution for your project, or schedule a Lunch & Learn with our team.
Or call us at 775-352-2700