Stormwater Management

Solutions That Keep Communities Compliant and Waterways Clean

RETTEW has been a trusted partner in stormwater management for more than four decades, helping communities, municipalities, and developers navigate an increasingly complex regulatory and environmental landscape. From rural townships managing agricultural runoff to urban boroughs retrofitting aging infrastructure, the challenges of stormwater are as varied as the communities we serve. No matter where you are in that spectrum, we bring the technical depth and practical experience to meet those challenges head-on, protecting water quality, public health, and your bottom line.

At RETTEW, we take a multidisciplinary approach to stormwater, integrating hydrologic and hydraulic engineering with environmental and geological expertise to develop solutions that work for your site, your budget, and your regulatory obligations. Our team handles the full range of stormwater services, including detention, retention, and infiltration best management practice design, drainage pattern and condition analysis, floodplain analysis and restoration, erosion and sediment control design and permitting, and storm drainage design and engineering. Soils and infiltration testing informs it all, so solutions are grounded in site reality before your design ever begins.

That technical depth carries directly into regulatory compliance. RETTEW has deep expertise in MS4 permit compliance and reporting, National Pollutant Discharge Elimination System permitting, and pollution reduction planning. We have helped dozens of municipalities apply for and secure local, state, and federal grant funding to offset the cost of new infrastructure and regulatory requirements, easing the burden on municipal budgets and ratepayers alike. Building community support is also part of that work. Our team develops education materials and public outreach programs that give residents and decision-makers the context they need to back long-term stormwater investments. When regulations evolve, we help you stay ahead of them, not catch up to them.