About Us

Construction Experience. Stormwater Expertise.

HydroCompliance combines decades of hands-on construction experience with specialized stormwater expertise. We understand the realities of active jobsites and deliver practical, effective compliance solutions that work in the field—not just on paper.

Our story

Since 2009

HydroCompliance is a spin-off of a stormwater consulting firm established in January 2009. Today our team brings more than 30 years of combined experience in construction, professional engineering and stormwater to every project.

We specialize in SWPPPs, WPCPs, training, permit compliance, site inspections and stormwater sampling. We have developed more than 1,600 SWPPPs, inspected more than 1,200 California sites and routinely manage more than 100 projects at a time.

Our goal is simple: keep your project compliant, on time and on budget, and represent you professionally when regulators come calling.

What guides us

  • Responsive. Fast answers and quick turnaround when weather or schedules change.
  • Practical. Solutions that balance regulatory requirements and development needs.
  • Thorough. Documentation that stands up to agency review.
  • Accountable. Clear communication from the first plan to final closeout.
Leadership

Meet our founders

Peter Thorne

Peter Thorne

President & Founder

Peter has more than 30 years of combined experience in construction, professional engineering and stormwater. He is known for developing strategic, creative solutions that balance regulatory requirements with development needs.

An expert in stormwater compliance and project quality management, Peter is well known across California and has led projects of every size and complexity.

Professional Engineer (RCE)QSD / QSPCPESCCESSWI
Emily Thorne

Emily Thorne

Vice President & Co-Founder

Emily brings more than 19 years of construction experience to HydroCompliance, including subcontractor management and site supervision. That field background shapes how she approaches compliance: practical, organized and focused on keeping the job moving.

Emily oversees SWPPP development, coordinates and schedules the inspection team, and manages site compliance monitoring, pH and turbidity sampling, SMARTS uploads and permit annual reports. Clients rely on her for clear communication and for resolving issues quickly when they come up on site.

QSD / QSPCPESCCESSWI
Credentials

Qualified and certified

Our team holds the certifications California's Construction General Permit requires, plus national credentials in erosion control and stormwater inspection.

PE / RCE

Licensed Professional Civil Engineer.

QSD

Qualified SWPPP Developer, authorized to prepare and amend SWPPPs.

QSP

Qualified SWPPP Practitioner, authorized to perform inspections, sampling and BMP oversight.

CPESC

Certified Professional in Erosion and Sediment Control.

CESSWI

Certified Erosion, Sediment and Storm Water Inspector.

CISEC

Certified Inspector of Sediment and Erosion Control.

Let's work together

We would love to hear about your next project.

Request a ProposalCall (530) 363-2148