Stormwater Drywell Maintenance and Vacuum Cleaning
Routine & Emergency Drywell Cleaning to Maintain ADEQ Compliance
Why Routine Drywell Maintenance Is Not Optional in Arizona
Stormwater drywells throughout the Phoenix metro accumulate sediment, parking lot debris, motor oil, and organic matter with every monsoon season. Over time, a neglected silting chamber loses its ability to drain properly — leading to standing water violations and ADEQ enforcement. SewerTime provides scheduled and emergency drywell cleaning across Maricopa County to keep your system draining and your property compliant.
Silting Chamber Cleaning: The Frontline Against System Failure
ADEQ requires all stormwater to drain from a property surface within 36 hours of a rain event. If your drywell can't meet that standard, the property is out of compliance and subject to fines and remediation orders. In Phoenix, where monsoon storms can drop several inches of rain in a matter of hours, a full silting chamber means standing water on your parking lot well past that deadline.
Our hydro-vacuum process begins with high-pressure water jetting to break apart compacted silt, grease, and debris within the primary settling chamber. The loosened material is then extracted via industrial vacuum into our sealed containment trucks. Once the chamber is cleared, we hydrojet the percolation zone to restore infiltration capacity to the surrounding gravel pack and native soil interface.
For commercial properties with multiple drywells—shopping centers, warehouse complexes, HOA common areas—we provide scheduled maintenance contracts that keep every unit operational year-round, with priority emergency response during monsoon season.
Hydro-Vacuum Silt Extraction
Industrial vacuum trucks remove accumulated sediment, rocks, trash, and organic debris from the silting chamber. Total extraction down to the chamber floor ensures maximum storage capacity is restored.
High-Pressure Hydrojetting
3,000+ PSI water jetting breaks apart compacted silt and grease deposits, then flushes the percolation zone to restore infiltration rates through the gravel pack and native soil.
Emergency Monsoon Response
When a sudden monsoon event overwhelms your system, our crews deploy within hours—not days. We clear flooded drywells and restore drainage before the 36-hour compliance window closes.
Maintenance Frequency & Commercial Property Partnerships
The required frequency of drywell maintenance depends directly on the volume and type of surface runoff entering the system. High-traffic commercial parking lots with heavy vehicle oil deposition require cleaning every 6 to 12 months. Residential and low-traffic drywells can typically sustain 12 to 24-month intervals between service.
SewerTime partners directly with commercial property managers, HOA boards, and facility maintenance directors across Phoenix, Scottsdale, Tempe, Chandler, and the East Valley to establish recurring service contracts. We handle scheduling, compliance documentation, and post-service reporting so your properties stay ADEQ-compliant without adding workload to your management team.
- 6–12 Month Intervals — Recommended for high-traffic commercial lots, gas stations, and industrial sites with heavy sediment and hydrocarbon loading
- 12–24 Month Intervals — Adequate for residential drywells, low-traffic commercial properties, and systems with pre-treatment filtration
- Post-Monsoon Emergency Service — Rapid-deployment cleaning after major storm events to prevent 36-hour standing water violations
- Compliance Documentation — Full service reports with before/after condition notes for your ADEQ compliance records and property management files
- Multi-Property Contracts — Discounted recurring service for property managers overseeing multiple commercial sites across the Valley