National Pollution Discharge Elimination System II

The Environmental Protection Agency (EPA) finalized regulations for storm water management in smaller communities - known as the NPDES Phase II Rule in 2000. This proposed rule is designed to comply with the requirements of the Clean Water Act and to further protect our nation’s streams, rivers and beaches from polluted storm water runoff.
Proposed Phase II
Proposed Phase II regulations follow the 1990 NPDES Phase I Rule, which addressed priority sources of pollutant runoff, including storm water pollution from medium and large municipal storm sewer systems, industrial sources, and construction sites disturbing at least five acres. Proposed Phase II requirements grew out of a long-standing concern on the part of federal legislators for protecting surface water in smaller jurisdictions.

EPA designated the Washington State Department of Ecology to implement the rule for Washington State. The permit through Ecology took effect in January 2007 and includes 80 cities and five counties in Western Washington. The term of the permit runs through January 2012 with phased implementation of permit requirements over the next 4 years.
No Dumping sign on storm water runoff grate.
Storm Water Management Program Modifications
Mountlake Terrace has modified the existing Storm Water Management Program to deal with additional required measures that include:
  • Reducing the discharge of pollutants to the “maximum extent practicable”
  • Protecting water quality
  • Satisfying all appropriate requirements of the Clean Water Act
These measures have been included in a new Storm Water Management Plan for the City related specifically to water quality issues.