[Batch Detention]
Stormwater Treatment That Actually Improves Water Quality, Not Just Delays the Problem
Most detention basins are designed to slow runoff, not clean it.
That’s fine for flood control but it doesn’t solve water quality.
Our batch detention systems do both. They actively remove pollutants before water leaves your site, helping Texas developments meet TCEQ requirements without the cost, footprint, or maintenance burden of traditional filtration systems.
Call us now! (512) 677-7246
What this means for your project:
Proven 91% TSS removal not just flow control
Lower construction and lifecycle costs than sand filters
Solar-powered automation that works even in remote locations
A system designed around your site conditions, not a template
Why Traditional Stormwater Systems Force Bad Tradeoffs
If you’re developing in Texas, stormwater design usually turns into a compromise.
You need to meet regulatory requirements, protect downstream water quality, and stay within budget all while working with real site constraints. Most systems make you choose between performance and practicality. You’re likely running into issues like:
Sand Filters
Sand filters that require deep excavation, precise grading, and ongoing media replacement
Wet Ponds
Wet ponds that demand constant water levels and consume valuable land
HOAs or Property Managers
Maintenance costs that eventually fall on HOAs or property managers
Water Quality Improvement
Detention basins that manage flow but do nothing for water quality
This isn’t a design flaw. It’s a system limitation. You shouldn’t have to overspend, or overcomplicate, just to meet compliance.
A Smarter Way to Treat Stormwater: Batch Detention
Batch detention systems are a modified form of extended detention designed specifically to treat stormwater, not just hold it.
Instead of letting runoff pass through unchecked, the system captures stormwater, holds it long enough for sediment to settle, then releases clarified water on a controlled schedule. The treatment happens before discharge not downstream.
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Site-Responsive Basin Design
Each basin is shaped to your site’s natural topography. That means less excavation, lower construction costs, and better use of available land. -
Automated, Solar-Powered Controls
A solar-powered controller and valve manage detention timing automatically — no utility power, no daily oversight. -
Flexible Integration
Batch detention can stand alone, stack with flood-control detention, or retrofit into an existing basin. One footprint. Multiple functions.
The result is a system that meets regulatory requirements, controls cost, and stays reliable over the long term without tradeoffs.
What Changes Once the System Is in Place
Cleaner Discharge Water
With a 91% TSS removal rate, batch detention consistently outperforms conventional detention basins and meets TCEQ stormwater quality standards for most developments.
Lower Total Project Cost
Smaller footprints, reduced earthwork, no filtration media, and no electrical installation mean lower upfront and long-term costs.
Built for Texas Conditions
Designed around local rainfall patterns and soil behavior, with minimal moving parts and long-term durability in mind.
Less to Maintain
The system runs automatically. No daily checks. No scheduled media replacement. Cellular alerts flag issues before they become problems.
Easier Site Integration
Works on flat sites, accepts flow from any direction, and avoids costly splitter boxes. Existing basins can often be upgraded instead of rebuilt.
A Straightforward Installation Process
Most projects move from assessment to operation in 4–8 weeks, depending on scope.
01
Site Assessment & Custom Design
We evaluate drainage patterns, soils, grades, and regulatory needs — then design a system that works with your site, not against it.
02
Basin Construction & Equipment
Our team handles excavation, grading, and control installation. Existing basins can often be reused.
03
Controller Programming & Testing
The system is configured to your detention requirements, solar power is installed, and performance is fully tested.
04
Handoff & Ongoing Support
We train your maintenance team, set up cellular alerts, and remain available for adjustments or questions.
This System Is a Strong Fit When:
If water quality matters and cost, simplicity, or independence are concerns batch detention is worth evaluating.
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New Developments
Meeting TCEQ requirements without blowing the site budget or sacrificing buildable area. -
Existing Basin Retrofits
Upgrading detention-only ponds into compliant treatment systems — often the most cost-effective option. -
Remote or Constrained Sites
Projects without reliable electrical access or with limited land area (typically under 5 acres for below-grade systems). -
HOA or Regional Facilities
Where low maintenance, predictable costs, and autonomous operation matter long after construction ends.
Time allows pollutants to settle.
Instead of relying on filtration media or continuous flow, the system holds water long enough for sediment to drop out — then drains only the clarified water.
Why Settling + Automation Works
At its core, batch detention uses a simple principle:
How the Cycle Works
- Rain fills the basin
- The outlet valve closes automatically
- Water is held for ~12 hours
- Clean water drains over ~48 hours
- The system resets for the next event
Key Design Advantages
- Any Shape, Any Flow Direction: no rigid geometries
- Stacked Functionality: water quality + flood control
- Minimal Head Requirements: works on flat sites
- No Filtration Media: nothing to replace later
Find Case Studies Matching Your Property
The Brain Behind the Basin
The controller manages detention timing, water levels, and system health automatically.
Why This Matters
The system doesn’t rely on someone remembering to check it. It runs on its own and speaks up only when it needs attention. That’s how you reduce long-term risk.
What It Handles:
- Valve operation based on rainfall and detention timing
- Water-level monitoring during drain cycles
- Cellular alerts for malfunctions or anomalies
- Fully solar-powered operation
WHY CHOOSE RAINWATER SPECIALISTS
Why Clients Trust Us With These Systems
We design for the site, not spreadsheets
Every system is custom-fit to real conditions topography, soils, drainage, and regulations.
One Team, Start to Finish
Assessment, design, construction, programming, and testing handled by one group, without handoff gaps.
Texas Experience in the Details
We design for Texas rainfall, soils, and regulators because this is where we build and where our systems stay in service.
Frequently Asked Questions
How does batch detention compare to sand filtration in cost?
Batch detention typically costs 30-50% less than sand filters for equivalent treatment performance. The savings come from three areas: smaller footprint (less excavation), no filtration media to purchase or replace, and lower maintenance requirements over the system’s lifespan.
Can this system be added to an existing detention basin?
Yes — and this is often the most cost-effective approach. If you have a detention basin that currently only controls peak flows, we can retrofit it with the automated control system to add water quality treatment. This converts a compliance liability into a compliant treatment system without building new infrastructure.
What happens if the controller fails?
The valve defaults to the closed position, so a controller failure means the pond simply holds water longer than normal rather than releasing untreated water. The cellular alert system notifies your maintenance team immediately if the controller detects a problem, giving you time to address issues before they impact performance.
Does this work in areas with limited elevation?
Yes. Unlike some BMPs that require significant head pressure, batch detention systems can function with minimal elevation difference between inlet and outlet. This makes them viable for flat sites where gravity-based systems struggle.
How often does the system need maintenance?
Routine maintenance is minimal — typically annual inspections to check valve operation and basin sediment accumulation. Unlike sand filters (which need media replacement every 3-5 years), batch detention maintenance is limited to occasional sediment removal when the basin reaches capacity. The automated controller handles daily operation without human intervention.
Is this TCEQ-approved?
Yes. Our design components, equipment specifications, and standard detail sheets meet TCEQ requirements for stormwater quality treatment. We provide all submittal documentation needed for regulatory approval.
Get a Custom System Design for Your Site
Every property has different drainage patterns, soil conditions, and regulatory requirements. We’ll assess your site and design a batch detention system that works with your landscape and your budget — not against them.
Call us now! (512) 677-7246