Local stormwater control agencies are ramping up enforcement of EPA mandated MS4 Phase 2 stormwater regulations. If you are developing or have plans for construction these regulations are likely to impact your project. Rainwater capture can be a major component of successful and economically feasible compliance and Rainwater Resources™ can help. There are numerous options for capturing rainwater and storing it for a productive use, or simply returning it as groundwater recharge. Our goal at Rainwater Resources™ is to turn the added burden of more regulation into a positive asset for your project whenever possible. Are you an architect, developer, or builder? Let our professional staff help make your next project easier with consultation, design services, or turnkey installations. (Contact Us)

Summary of Stormwater Phase II (MS4 – Phase II)

According to EPA: (View full overview here)

Why is The Phase II Stormwater Program Necessary?

Since the passage of the clean water act (CWA), the quality of our Nation’s water has improved dramatically. Despite this progress, however, degraded waterbodies still exist. According to the 2000 National Water Quality Inventory (Inventory), a biennial summary of State surveys of water quality, approximately 40 percent of surveyed U.S. waterbodies are still impaired by pollution and do not meet water quality standards.

The Stormwater Phase II Final Rule is the next step in EPA’s effort to preserve, protect, and improve the Nation’s water resources from polluted stormwater runoff. The Phase II program expands the Phase I program by requiring additional operators of MS4s in urbanized areas and operators of small construction sites, through the use of NPDES permits, to implement programs and practices to control polluted stormwater runoff.

Phase II is intended to further reduce adverse impacts to water quality and aquatic habitat by instituting the use of controls on the unregulated sources of stormwater discharges that have the greatest likelihood of causing continued environmental degradation.

The environmental problems associated with discharges from MS4 in urbanized areas and discharges resulting from construction activity are outlined here.

What Does the Phase II Final Rule Require?

Find out the rules that will apply to your situation? Again, link here for the full overview.


Denis Rochat, 03.23.2012