Here is a press release from the Natural Resources Defense Council.   New Data Show About 100 Major U.S. Water Supplies Vulnerable To Milwaukee-Type Disease Outbreak  To: National Desk, Environment Writer  Contact: Erik Olson or Sarah Silver, 202-783-7800, both           of the Natural Resources Defense Council     WASHINGTON, April 14  -- Internal EPA data released today by the Natural Resources Defense Council reveals that about 100 large water systems -- serving cities from Boston to San Francisco -- do not filter to remove disease-carrying organisms leaving those communities potentially vulnerable to a disease outbreak similar to the one affecting Milwaukee.    The EPA list is attached.    "These internal EPA documents reveal that the safety of water supplies in many American cities is threatened by inadequate pollution controls or filtration," said Erik Olson, a senior attorney with NRDC.  "Water contamination isn't just a problem in Bangladesh, it's also a problem in Bozeman and Boston."    "As of June 29, 1993, about 100 large surface water systems on EPA's list probably will be breaking the law.  The 1986 Safe Drinking Water Act requires all surface water systems to either filter their water or fully protect the rivers or lakes they use from pollution," Olson continued.  Some systems are moving towards eventually implementing filtration systems but are expected to miss the law's deadline.    Olson pointed out that the threat of contamination is already a reality in other cities.  A 1991 survey of 66 U.S. surface water systems by water utility scientists found that 87 percent of raw water samples contained the Milwaukee organism cryptosporidium, and 81 percent contained a similar parasite called giardia.    Adding to the level of concern, a General Accounting Office study released today by House Health and Environment Subcommittee Chairman Henry Waxman indicates serious deficiencies in the nation's system for conducting and following through on sanitary surveys of water systems.    "This new information raises a huge warning sign that millions of Americans can no longer simply turn on their taps and be assured that their water is safe to drink.  We must immediately put into place programs to protect water sources from contamination and where this is not assured, filtration equipment must be installed to protect the public," Olson noted.  "The time has come for many of the nation's water utilities to stop dragging their feet and to aggressively protect their water from contamination; consumers are prepared to pay the modest costs needed to assure their water is safe to drink."    NRDC is a national non-profit environmental advocacy organization.     Systems EPA Indicates Require Filtration and Do Not Adequately Protect Watersheds   CONNECTICUT   Bridgeport            Bridgeport Hydraulic Co.   MASSACHUSETTS  Boston                H2O Resource Author (MWRA)  Medford               MWRA-Medford Water Dept  Melrose               MWRA-Melrose Water Dept  Hilton                MWRA-Hilton Water Dept  Needham               MWRA-Needham Water Division  Newtoncenter          MWRA-Newton Water Dept.  Marblehead            MWRA-Marblehead Water Dept  Quincy                MWRA-Quincy Water Dept  Norwood               MWRA-Norwood Water Dept  Framingham            MWRA-Framingham Water Div  Cambridge             MWRA-Cambridge Water Dept  Canton                MWRA-Canton Water Div-DPW  Chelsea               MWRA-Chelsea Water Dept  Everett               MWRA-Everett Water Dept  Lexington             MWRA-201 Bedford (PUO WRKS)  Lynn                  MWRA-Lynn Water & Sewer Co  Malden                MWRA-Malden Water Division  Revere                MWRA-Revere Water Dept  Woburn                MWRA-Woburn Water Dept  Swampscott            MWRA-Swampscott Water Dept  Saugus                MWRA-Saugus Water Dept  Somerville            MWRA-Somerville Water Dept  Stoneman              MWRA-Stoneman Water Dept  Brookline             MWRA-Brookline Water Dept  Wakefield             MWRA-Same as Above  Waltham               MWRA-Waltham Water Division  Watertown             MWRA-Watertown Water Division  Weston                MWRA-Weston Water Dept  Dedham                MWRA-Dedham-Westwood District  Winchester            MWRA-Winchester Water & Sewer  Winthrop              MWRA-Winthrop Water Dept  Boston                MWRA-Boston Water & Sewer Co  S. Hadley             MWRA-South Hadley Fire Dist  Arlington             MWRA-Arlington Water Dept  Belmont               MWRA-Belmont Water Dept  Clinton               MWRA-Clinton Water Dept  Attleboro             Attleboro Water Dept  Fitchburg             Fitchburg Water Dept  Northampton           Northampton Water Dept  North Adams           North Adams Water Dept  Amherst               Amherst Water Division DPW  Gardner               Gardner Water Dept  Worcester             Worcester DPW, Water Oper  Westboro              Westboro Water Dept  Southbridge           Southbridge Water Supply Co  Newburyport           Newburyport Water Dept  Hingham               Hingham Water Co  Brockton              Brockton Water Dept   MAINE  Rockland              Camden & Rockland Water Co  Bath                  Bath Water District   NEW HAMPSHIRE  Keene                 City of Keene  Salem                 Salem Water Dept   VERMONT  Barre City            Barre City Water System  Rutland City          Rutland City Water Dept   NEW YORK  Glens Falls           Glens Falls City  Yorktown Hts          Yorktown Water Storage & Dist  Rochester             Rochester City  Henrietta             Henrietta WD  Rochester             MCWA Upland System  Rochester             Greece Consolidated  New York              NYC-Aquaduct Sys (Croton)  Chappaqua             New Castle/Stanwood WD  Beacon                Beacon City  Mamaronek             Westchester Joint Water Works   PENNSYLVANIA  Bethlehem             Bethlehem Public Water Sys  Johnstown             Greater Johnstown Water Auth  Lock Haven            City of Lock Haven-Water Dept  Shamokin              Roaring Creek Water Comp  Harrisburg            Harrisburg City  Hazleton              Hazleton City Water Dept  Wind Gap              Blue Mt Consolidated  Apollo                Westmoreland Auth  Fayettville           Guilford Water Auth  Humlock Creek         PG&W-Ceasetown Reservoir  Springbrook           PG&W-Waters Reservoir  Wilkes Barre          PG&W-Gardners Creek  Wilkes Barre          PG&W-Hill Creek  Wilkes Barre          PG&W-Plymouth Relief  Altoona               Altoona City Auth  Tamaqua               Tamaqua Municipal water  Waynesboro            Waynesboro Borough Auth  Pottsville            Schuykill Co Mun Auth   VIRGINIA  Covington             City of Covington  Fishersville          South River Sa Dist-ACSA   SOUTH CAROLINA  Greenville            Greenville Water Sys   MICHIGAN  Sault Ste Marie       Sault Ste Marie  Marquette             Marquette   MONTANA  Butte                 Butte Water Co  Bozeman               Bozeman City   CALIFORNIA  San Francisco         City & County of San Fran   NEVADA  Reno                  Westpac   IDAHO  Twin Falls            Twin Falls City   WASHINGTON  Aberdeen              Aberdeen Water Dept  Centralia             Centralia Water Dept   -30-