From www.wsscwater.com:
WSSC operates and maintains 2 water filtration plants -- the Patuxent (max 56 mgd) and the Potomac (max 285 mgd) plants produce an average of 167 million gallons per day (MGD) of safe drinking water.
Washington Suburban Sanitary Commission's Potomac Water Filtration Plant
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By AlbinoFlea @ 2005-12-05 00:31:24