NORTH BEACH, MD - AUGUST 03: A Blue Heron walks along the rocks as the early morning sun is reflected over the Chesapeake Bay August 3, 2006 in North Beach, Maryland. Temperatures in the Washington, DC area are expected to reach the upper ninties. (Photo by Mark Wilson/Getty Images)
The 234-page plan was submitted Friday, four days after a federal deadline.
The plans lists measures state officials vow to take over the next seven years for 70 percent of pollution reductions needed.
Proposals include requiring retrofits of storm drains and other projects in cities and suburbs to reduce polluted rainwater washing off and requiring about 28,000 households near the bay and its river tributaries to upgrade their septic systems.
The Chesapeake Bay Foundation said in a statement that the plan postpones difficult decisions.