Degradation of Mattawoman to continue if Comprehensive Plan is not improved!

Experts say this comp plan is the “last opportunity” to assure Mattawoman’s health, but the present plan “will not” do it.

 Details here.

Mallows Bay-Potomac River nomination to become a National Marine Sanctuary.

Comments due January 15, 2016.

Please consider asking for a larger sanctuary.
Details here.


Click each title for more information

  • MWS winning photo MWS won a photo contest taken during a trash clean-up on the shores of the Mattawoman Creek tidal estuary. The effort was part of the April 11, 2015 Potomac ...
    Posted Sep 27, 2015, 2:16 PM by
  • Globally Rare Bog Threatened The large Guilford subdivision proposed for Bryans Road may spell the beginning of the end for Charles County's last unspoiled Magnolia Bog. This plant community merits  the rarest designation ...
    Posted Jun 25, 2015, 4:38 AM by
  • MWS assists Anacostia Watershed Society MWS hosted members of the Anacostia Watershed Society, who were collecting submerged plants to transplant to the Anacostia River. In a regional irony, Mattawoman is slated to have the same ...
    Posted Jun 24, 2015, 6:54 PM by
  • MWS awarded water quality meter Out of 350 applicants, the Mattawoman Watershed Society has been awarded a meter that measures the amount of oxygen dissolved in water. The instrument, which uses a state-of-the ...
    Posted May 30, 2015, 10:02 AM by
  • MWS cleans up fishing hole MWS participated in the Potomac River Watershed Cleanup on April 11th. A morning's camaraderie overlooking the estuary left a popular fishing spot spotless.
    Posted Apr 25, 2015, 12:06 PM by
  • MWS in Stream Waders Video MWS volunteers are featured in a video highlighting Maryland's Stream Waders program. The monthly video newsletter is produced by the Maryland Department of Natural Resources. The video explains the ...
    Posted Apr 3, 2015, 6:31 PM by
  • MWS in the news A feature article on the front page of the March 11th Maryland Independent discusses rare and endangered plants and animals in southern Maryland, and efforts by a number of groups ...
    Posted Mar 14, 2015, 1:58 PM by
  • MWS president wins prestigous award Mattawoman Watershed Society president Dr. Jim Long received the prestigious Carl S. Weber award at the 20th annual conference of the Maryland Water Monitoring Council. The award honors an individual ...
    Posted Dec 14, 2014, 6:35 PM by
  • Chesapeake Bay Agreement signed In a historic first, land use and climate change were recognized as threats to the Chesapeake Bay when the governors of six states and the mayor of the District of ...
    Posted Jun 28, 2014, 11:22 AM by
  • MWS wins Most Beautiful Tent award at ArtsFest 2014 Volunteers for the Mattawoman Watershed Society were surprised when a committee with the Charles County Arts Alliance arrived at their tent on June 7 to deliver the 1st Place award ...
    Posted Jun 8, 2014, 2:44 PM by
Showing posts 1 - 10 of 32. View more »



Mallows Bay-Potomac River
National Marine Sanctuary

NOAA invites public comments

Please consider expanded boundaries

Deadline January 15
, 2016

The process for designating a Mallows Bay-Potomac River National Marine Sanctuary has reached the scoping stage. The public is encouraged to provide input on what they'd like the sanctuary to  be.

Note: the nomination for this sanctuary encourages fishing.

MWS advocates for expanded boundaries to better meet the goals for education, research, and boosted tourism. As currently proposed, the boundaries encompass historic Mallows Bay and a small section of the surrounding Potomac (to the opposite shore). This makes it one of the smallest sanctuaries, and misses a prime opportunity to leverage the extensive ecological range of a larger sanctuary. 

Click the "Comment Now!" button.