Maryland Tap Water Quality: Is It Safe to Drink?

2026 EPA water quality data for 150 community water systems serving 801,385+ people in Maryland. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.

Maryland draws drinking water from the Potomac River, Susquehanna watershed reservoirs, and Coastal Plain aquifers. Lead from older plumbing is a key concern in Baltimore, which has been replacing lead service lines. Agricultural nutrient runoff on the Eastern Shore contributes to nitrate levels in shallow groundwater.

Find Your Water System in Maryland

Enter your ZIP code to see EPA violations, lead test results, PFAS data, and a safety grade for your water.

📊 Data from EPA’s SDWIS · 🔄 Updated quarterly · 🏛️ 150+ water systems in Maryland

GLEN BURNIE-BROADNECK MILLERSVILLE, MD · 290,606 people · Groundwater CROFTON-ODENTON MILLERSVILLE, MD · 62,986 people · Groundwater FORT GEORGE G. MEADE FORT MEADE, MD · 62,234 people · Groundwater CITY OF WESTMINSTER WESTMINSTER, MD · 35,256 people · Surface Water CITY OF ANNAPOLIS ANNAPOLIS, MD · 35,000 people · Groundwater CITY OF CUMBERLAND CUMBERLAND, MD · 27,039 people · Surface Water BROAD CREEK MILLERSVILLE, MD · 26,033 people · Groundwater FREEDOM DISTRICT WESTMINSTER, MD · 24,867 people · Surface Water TOWN OF ELKTON ELKTON, MD · 15,625 people · Surface Water TOWN OF LA PLATA LA PLATA, MD · 11,535 people · Groundwater CITY OF FROSTBURG FROSTBURG, MD · 11,000 people · Surface Water TOWN OF MOUNT AIRY MOUNT AIRY, MD · 9,890 people · Groundwater CHESAPEAKE RANCH ESTATES LUSBY, MD · 9,500 people · Groundwater U.S. NAVAL ACADEMY ANNAPOLIS, MD · 8,700 people · Groundwater TOWN OF NORTH EAST NORTH EAST, MD · 8,600 people · Surface Water CITY OF TANEYTOWN TANEYTOWN, MD · 6,750 people · Groundwater TOWN OF HAMPSTEAD HAMPSTEAD, MD · 6,600 people · Groundwater BRYANS ROAD LA PLATA, MD · 6,260 people · Groundwater EASTERN REGION ALLEGANY DISTRIB. SYSTEM CUMBERLAND, MD · 5,703 people · Surface Water Purchased LAVALE SANITARY COMMISSION LAVALE, MD · 5,500 people · Surface Water Purchased MARYLAND AMERICAN WATER--SEVERN SYSTEM BEL AIR, MD · 5,447 people · Groundwater MIDLAND-LONACONING LONACONING, MD · 5,000 people · Surface Water TOWN OF CHESAPEAKE BEACH CHESAPEAKE BEACH, MD · 5,000 people · Groundwater WESTERN REGION ALLEGANY DISTRIB. SYSTEM CUMBERLAND, MD · 4,955 people · Surface Water Purchased TOWN OF MANCHESTER MANCHESTER, MD · 4,954 people · Groundwater TOWN OF DENTON DENTON, MD · 4,500 people · Groundwater TOWN OF PERRYVILLE PERRYVILLE, MD · 4,413 people · Surface Water PRINCE FREDERICK PRINCE FREDERICK, MD · 4,371 people · Groundwater TOWN OF INDIAN HEAD INDIAN HEAD, MD · 4,100 people · Groundwater THE PROVINCES DUNKIRK, MD · 3,991 people · Groundwater SOLOMONS PRINCE FREDERICK, MD · 3,811 people · Groundwater TOWN OF CHARLESTOWN WILLARDS, MD · 3,791 people · Groundwater ELKTON WEST NEWARK, DE · 3,500 people · Surface Water Purchased TOWN OF NORTH BEACH NORTH BEACH, MD · 3,000 people · Groundwater BEL AIR - PINTO DISTRIBUTION SYSTEM DUNKIRK, MD · 2,614 people · Surface Water Purchased TOWN OF FEDERALSBURG FEDERALSBURG, MD · 2,450 people · Groundwater WAKEFIELD VALLEY WESTMINSTER, MD · 2,436 people · GWUDI LAKE VILLAGE TOWNHOMES SEVERN, MD · 2,400 people · Groundwater HERALD HARBOR MILLERSVILLE, MD · 2,241 people · Groundwater TOWN OF WESTERNPORT WESTERNPORT, MD · 2,200 people · Surface Water TOWN OF RISING SUN ELKTON, MD · 2,200 people · Surface Water Purchased MOUNTAIN HILL WATER COMPANY NEWARK, DE · 2,154 people · Surface Water Purchased BEACHES WATER CO-OPERATIVE ST. LEONARD, MD · 2,000 people · Groundwater PERRY POINT V.A. MEDICAL CENTER PERRY POINT, MD · 2,000 people · Surface Water TOWN OF GREENSBORO GREENSBORO, MD · 1,878 people · Groundwater POTOMAC HEIGHTS INDIAN HEAD, MD · 1,800 people · Groundwater TOWN OF NEW WINDSOR NEW WINDSOR, MD · 1,732 people · Groundwater TOWN OF RIDGELY RIDGELY, MD · 1,600 people · Groundwater SPRINGFIELD HOSPITAL DISTRIBUTION SYKESVILLE, MD · 1,500 people · Surface Water Purchased SCIENTISTS CLIFFS PORT REPUBLIC, MD · 1,425 people · Groundwater CROWNSVILLE HOSPITAL CENTER MILLERSVILLE, MD · 1,348 people · Groundwater BOONES MOBILE ESTATES LOTHIAN, MD · 1,315 people · Groundwater SHERWOOD FOREST WATER COMPANY SHERWOOD FOREST, MD · 1,200 people · Groundwater CHESAPEAKE HEIGHTS (BAYSIDE FOREST) PRINCE FREDERICK, MD · 1,190 people · Groundwater SUMMIT/HIGHLANDS PRINCE FREDERICK, MD · 1,108 people · Groundwater TOWN OF UNION BRIDGE UNION BRIDGE, MD · 997 people · GWUDI PINE HILLS NEWARK, DE · 953 people · Groundwater TOWN & COUNTRY MOBILE HOME PARK NORTH EAST, MD · 950 people · Groundwater SWAN POINT LA PLATA, MD · 945 people · Groundwater HOLIDAY MOBILE ESTATES, INC. JESSUP, MD · 900 people · Groundwater STELLA MARIS TIMONIUM, MD · 873 people · Surface Water Purchased SOUTHERN REGION ALLEGANY DISTRIB. SYSTEM CUMBERLAND, MD · 865 people · Surface Water Purchased MARYLAND MANOR MOBILE HOME PARK LOTHIAN, MD · 810 people · Groundwater LYONS CREEK ESTATES LOTHIAN, MD · 750 people · Groundwater TOWN OF PRESTON PRESTON, MD · 750 people · Groundwater CLIFFTON ON THE POTOMAC LA PLATA, MD · 744 people · Groundwater PORT DEPOSIT NEWARK, DE · 725 people · Surface Water TOWN OF CHESAPEAKE CITY [FORMERLY SOUTH] CHESAPEAKE CITY, MD · 673 people · Groundwater Purchased CHARLES COUNTY GARDENS WATER WALDORF, MD · 551 people · Groundwater WAYSONS MOBILE COURT FARMINGTON HILLS, MI · 540 people · Groundwater EPPING FOREST MD · 500 people · Groundwater CRYSTAL BEACH MANOR/T&C UTILITY TIMONIUM, MD · 500 people · Groundwater TOWN OF CECILTON CECILTON, MD · 477 people · Groundwater GLEN MEADOWS RETIREMENT COMMUNITY GLEN ARM, MD · 468 people · GWUDI MISTY MEADOWS 1 / HIGHLAND HILLS M.H.P. STREET, MD · 460 people · Groundwater PATUXENT MOBILE ESTATES LOTHIAN, MD · 450 people · Groundwater GAITHER MANOR APARTMENTS SYKESVILLE, MD · 450 people · Groundwater HARBOR VIEW NEWARK, DE · 437 people · Groundwater CROSS POINT SUBDIVISION PRINCE FREDERICK, MD · 434 people · Groundwater SUNNYBROOK BALTIMORE, MD · 416 people · Groundwater ELKRIDGE ESTATES OF ROLAND PARK TYSONS, VA · 414 people · Surface Water Purchased CARPENTERS POINT WATER CO. NEWARK, DE · 400 people · Groundwater BENJAMINS VILLAGE/HOMESTEAD M.H.P. PORT DEPOSIT, MD · 400 people · Groundwater STONEY CHASE/ ROCK CREEK M.H.P.S ELKTON, MD · 396 people · Groundwater CAROLINE ACRES MOBILE HOME PARK MD · 395 people · Groundwater CAVALIER COUNTRY PRINCE FREDERICK, MD · 381 people · Groundwater KINGS MANOR - WHITE PLAINS WATER CO, INC WALDORF, MD · 372 people · Groundwater SHORES OF CALVERT PRINCE FREDERICK, MD · 361 people · Groundwater SUMMERHILL MOBILE HOME PARK GLEN ARM, MD · 350 people · Groundwater ST. LEONARD PRINCE FREDERICK, MD · 350 people · Groundwater CALVERT BEACH - DECATUR STREET WALDORF, MD · 350 people · Groundwater KENWOOD BEACH PRINCE FREDERICK, MD · 338 people · Groundwater WHISPERING PINES MOBILE HOME PARK NEW CASTLE, DE · 325 people · Groundwater CECIL WOODS M.H.P. DISTRIBUTION SYSTEM SPRINGFIELD, PA · 320 people · Groundwater Purchased BEL ALTON LA PLATA, MD · 311 people · Groundwater MIDLOTHIAN WATER COMPANY MIDLOTHIAN, MD · 300 people · Groundwater BENEDICTINE SCHOOL RIDGELY, MD · 300 people · Groundwater CEDAR MOBILE HOME PARK COLUMBIA, MD · 300 people · Groundwater PHEASANT RIDGE ESTATES MOUNT AIRY, MD · 300 people · Groundwater SHERWOOD FOREST/FOREST VIEW VILLAGE MHP ELKTON, MD · 293 people · Groundwater MARLEY RUN PRINCE FREDERICK, MD · 290 people · Groundwater AUTUMN LAKE HEALTHCARE RISING SUN, MD · 290 people · Groundwater CECIL WOODS MOBILE HOME PARK WTP NEWARK, DE · 285 people · Groundwater BAY COUNTRY ESTATES MOBILE HOME PARK RISING SUN, MD · 276 people · Groundwater GIBSON ISLAND MILLERSVILLE, MD · 275 people · Groundwater PARIS OAKS / DAYS END PRINCE FREDERICK, MD · 251 people · Groundwater WEST NOTTINGHAM ACADEMY COLORA, MD · 250 people · Groundwater CONOWINGO MOBILE HOME PARK LANCASTER, PA · 250 people · Groundwater ROSE HAVEN MILLERSVILLE, MD · 235 people · Groundwater REGENCY MANOR MOBILE HOME PARK LOTHIAN, MD · 224 people · Groundwater HILLANDALE MOBILE HOME PARK BELLE MEAD, NJ · 220 people · Groundwater FOREST GREEN COURT MOBILE HOME PARK PORT DEPOSIT, MD · 212 people · Groundwater LAKEWOOD PRINCE FREDERICK, MD · 203 people · Groundwater WESTERN SHORES WALDORF, MD · 200 people · Groundwater RED HILL WATER COMPANY, INC. WALDORF, MD · 200 people · Groundwater MARIELLEN PARK LA PLATA, MD · 184 people · Groundwater TODD VILLAGE MOBILE HOME PARK FINKSBURG, MD · 180 people · Groundwater MAPLE HILL MOBILE ESTATES PORT DEPOSIT, MD · 180 people · Groundwater OAK HILL WATER COMPANY, LLC WALDORF, MD · 180 people · Groundwater MOUNT CARMEL WOODS LA PLATA, MD · 175 people · Groundwater NEWTOWN VILLAGE LA PLATA, MD · 170 people · Groundwater BARK HILL WESTMINSTER, MD · 163 people · Groundwater CHESAPEAKE ESTATES MOBILE HOME PARK BERWYN, PA · 159 people · Groundwater WALNUT CREEK PRINCE FREDERICK, MD · 158 people · Groundwater TOWN OF HENDERSON PORT DEPOSIT, MD · 156 people · Groundwater RIO VISTA PLAZA MOBILE HOME PARK BALTIMORE, MD · 150 people · Groundwater JONESTOWN WATER SYSTEM DENTON, MD · 150 people · Groundwater WOODBINE VILLAGE MOBILE HOME PARK POTOMAC, MD · 150 people · Groundwater ROCKBROOK VILLAGE MOBILE HOME PARK ELLICOTT CITY, MD · 150 people · Groundwater DU MAR ESTATES WATER COMPANY MARBURY, MD · 150 people · Groundwater POMFRET ESTATES - UTILCO, INC. WALDORF, MD · 150 people · Groundwater GOLDEN KAY APARTMENTS ELKTON, MD · 148 people · Groundwater PINE HILL WATER COMPANY WALDORF, MD · 140 people · Groundwater PLEASANT VALLEY WESTMINSTER, MD · 139 people · Groundwater TRIMAC WATER COMPANY - FOREST PARK WALDORF, MD · 139 people · Groundwater WOODLAWN MOBILE HOME PARK - NEW PORT DEPOSIT, MD · 134 people · Groundwater BARRELVILLE MT. SAVAGE, MD · 130 people · Groundwater BEANTOWN PARK- WOODLEY ROAD LA PLATA, MD · 127 people · Groundwater CHAPEL HILL NURSING CENTER RANDALSTOWN, MD · 125 people · Groundwater POMONKEY WATER COMPANY - FORD HEIGHTS WALDORF, MD · 125 people · Groundwater HUNTING HILLS PRINCE FREDERICK, MD · 124 people · Groundwater NEWTOWN ESTATES - TIP HILL WATER CO. WALDORF, MD · 110 people · Groundwater HIGHLAND ESTATES DISTRIBUTION SYSTEM DUNKIRK, MD · 105 people · Surface Water Purchased PLEASANT VIEW NURSING HOME MOUNT AIRY, MD · 104 people · Groundwater GREEN RIDGE BOYS CAMP CASCADE, MD · 100 people · Groundwater CALVERT BEACH / FOREST TRAIL WALDORF, MD · 100 people · Groundwater DOVER BRIDGE PARK DURHAM, NC · 100 people · Groundwater ROUTE 7 DISTRIBUTION SYSTEM NEWARK, DE · 100 people · Surface Water Purchased GRANITE MOBILE HOME PARK BETHESDA, MD · 96 people · Groundwater SPRING VALLEY LA PLATA, MD · 91 people · Groundwater