Terraphase assists industries, public and private utilities, school districts, and government agencies with stormwater compliance. We provide nationwide support for a wide range of National Pollution Discharge Elimination System (NPDES) permit programs, including industrial, construction, Municipal Separate Storm Sewer System (MS4) Phase I and II, and special use general permits. Our team of stormwater experts offer an array of services, including:

• Permit preparation and compliance strategy

• Stormwater sampling, reporting, and pollutant source control

• Regulatory negotiations and expert legal support

• Corrective action planning and implementation

• Design of permanent erosion control systems, Low Impact Development (LID), and Green Infrastructure (GI) solutions

We help clients achieve permit benchmarks, provide technical solutions to complex stormwater challenges, support response to third-party litigation efforts, and offer engineering expertise tailored to each project. Our team excels at building and managing stormwater programs that align with regulatory requirements and organizational goals.

Our experts participate in various statewide committees that focus on stormwater management, permits, and policy-making.