Stormwater Drywell Solutions and ADEQ Compliance Services
ADEQ-Compliant Drywell Installation, Vacuum Maintenance & Permit Services
ADEQ-Compliant Stormwater Drywell Systems
During monsoon season, Phoenix parking lots and commercial properties can see significant water accumulation in a matter of minutes. When municipal storm drains are undersized or unavailable, private commercial properties are required to manage their own surface drainage. Stormwater drywells provide a reliable way to move that runoff underground and into the earth where it can percolate away from the surface.
SewerTime handles the full lifecycle of commercial drywell systems — from initial installation to routine maintenance — keeping your property compliant, draining properly, and protected from standing water damage.
The "36-Hour Environmental Rule"
The Arizona Department of Environmental Quality (ADEQ) strictly mandates that all standing surface water must completely drain within 36 hours to prevent mosquito breeding vector zones and public health hazards. If a drywell fails this percolation standard, property management is immediately subject to regulatory fines.
Silting Chamber Vacuum Maintenance
Over time, a drywell’s silting chamber fills with parking lot debris, motor oil, and sediment — reducing the system’s ability to drain. Routine hydro-vacuum cleaning removes that buildup and restores proper function. For ADEQ-registered systems, maintenance isn’t optional — it’s part of staying compliant.
- Hydrovac Silt Extraction: Total removal of bio-fouling and fine particulates from the primary trap.
- High-Pressure Hydrojetting: Restoring the porous percolation capability of the internal gravel pack.
End-to-End Drywell Services for the Phoenix Metro
With over 50,000 drywells registered in the greater Phoenix area, these underground drainage systems are a standard part of managing monsoon runoff on commercial properties. SewerTime provides end-to-end drywell services, from initial installation and drilling to routine maintenance and ADEQ compliance.
ADEQ-Compliant Installation
A drywell is designed specifically for the onsite subsurface disposal of stormwater, allowing millions of gallons of runoff to safely infiltrate the earth without overwhelming municipal sewers. All SewerTime installations strictly adhere to ADEQ mandates.
- Drywells must be located at least 100 feet from any water supply well
- Systems must be at least 20 feet away from underground storage tanks
- The bottom of the drilled shaft must remain at least 10 feet above the highest known groundwater table
- All surface grates must be permanently marked “Stormwater Only” to prevent hazardous dumping
Maintenance and the 36-Hour Rule
Local ordinances mandate that no stormwater can remain ponded on a property for longer than 36 hours after a rain event. If water fails to drain, the drywell has failed, creating a public health nuisance by breeding mosquitoes.
We offer routine hydro-vacuuming to clean the internal settling chamber, removing the heavy debris, rocks, sediment, and floating hydrocarbons that clog the system.
Hydro-Vacuum Cleaning
Routine vacuuming of the internal settling chamber to remove debris, sediment, rocks, and floating hydrocarbons that restrict water flow and cause system failure.
Aquifer Protection Permits (APP)
Expert consultation for commercial and industrial properties on obtaining and maintaining the required Aquifer Protection Permits from ADEQ.
Best Management Practices Plans
We help you develop legally required Best Management Practices Plans (BMPP) to ensure hazardous substances never reach the aquifer.