PFAS contamination data for 7,869 water systems in Maryland, serving 15,104,611 people.
Maryland follows federal EPA MCLs (PFOA/PFOS: 4 ppt).
MD follows federal EPA MCLs. Developing state PFAS action plan. Contamination near military installations.
Maryland follows federal EPA MCLs. Contamination investigation at multiple military sites including Aberdeen Proving Ground and Andrews JB.
Free eligibility check — plus weekly MCL, deadline, and funding alerts for Maryland.
| System | City | Population | PFOA (ppt) | PFOS (ppt) | Status |
|---|---|---|---|---|---|
| WASHINGTON SUBURBAN SANITARY COMMISSION MD0150005 | LAUREL | 1,900,000 | — | — | Compliant |
| BALTIMORE CITY-BUREAU WATER SU MD0002208 | BALTIMORE | 1,755,000 | — | — | Compliant |
| CITY OF BALTIMORE MD0300002 | BALTIMORE | 1,600,000 | — | — | Compliant |
| WASHINGTON SUBURBAN SANITARY C MD0002489 | HYATTSVILLE | 1,300,000 | — | — | Compliant |
| ASHBURTON MD0300001 | BALTIMORE | 500,000 | — | — | Compliant |
| WSSC (INCLUDED IN 0150005) MD0160014 | LAUREL | 482,000 | — | — | Compliant |
| GLEN BURNIE-BROADNECK MD0020017 | MILLERSVILLE | 290,606 | — | — | Compliant |
| HOWARD COUNTY D.P.W. DISTRIBUTION MD0130002 | COLUMBIA | 286,158 | — | — | Compliant |
| OCEAN CITY MD0002623 | OCEAN CITY | 150,000 | — | — | Compliant |
| ARNOLD WTP % ANNAPOLIS DPW MD0002869 | ANNAPOLIS | 150,000 | — | — | Compliant |
| HARFORD COUNTY D.P.W. MD0120016 | ABINGDON | 104,567 | — | — | Compliant |
| CITY OF HAGERSTOWN MD0210010 | HAGERSTOWN | 92,200 | — | — | Compliant |
| WALDORF - CHARLES COUNTY DPW MD0080049 | LA PLATA | 84,296 | — | — | Compliant |
| GLEN BURNIE ANNE ARUNDEL CO MD0002429 | GLEN BURNIE | 78,000 | — | — | Compliant |
| NEW DESIGN - FREDERICK COUNTY MD0100030 | FREDERICK | 74,911 | — | — | Compliant |
| HAGERSTOWN MD0002453 | HAGERSTOWN | 70,000 | — | — | Compliant |
| CROFTON-ODENTON MD0020008 | MILLERSVILLE | 62,986 | — | — | Compliant |
| FORT GEORGE G. MEADE MD0020012 | FORT MEADE | 62,234 | — | — | Compliant |
| ELLIC. CITY-COLUMBIA HWD CO DP MD0002359 | ELLICOTT CITY | 59,500 | — | — | Compliant |
| CITY OF FREDERICK MD0100015 | FREDERICK | 54,000 | — | — | Compliant |
| ELLICOTT CITY MD0130003 | COLUMBIA | 46,000 | — | — | Compliant |
| LEXINGTON PARK MD0180007 | CALIFORNIA | 43,030 | — | — | Compliant |
| ROCKVILLE FILTRATION PLANT MD0002717 | ROCKVILLE | 40,000 | — | — | Compliant |
| CUMBERLAND-EVITTS CREEK WATER MD0002301 | CUMBERLAND | 40,000 | — | — | Compliant |
| ANNAPOLIS MD0002191 | ANNAPOLIS | 40,000 | — | — | Compliant |
| CITY OF WESTMINSTER MD0060015 | WESTMINSTER | 35,256 | 12.4 | 6.9 | Exceeds |
| CITY OF ANNAPOLIS MD0020001 | ANNAPOLIS | 35,000 | — | — | Compliant |
| BELAIR-BOWIE MD0002242 | BOWIE | 32,000 | — | — | Compliant |
| BELAIR-BOWIE WATER TREATMENT MD0000710 | BOWIE | 31,000 | — | — | Compliant |
| CITY OF SALISBURY MD0220004 | SALISBURY | 30,343 | 5.9 | 20 | Exceeds |
| TOWN OF OCEAN CITY MD0230003 | OCEAN CITY | 30,000 | — | — | Compliant |
| FREDERICK MD0002388 | FREDERICK | 28,000 | — | — | Compliant |
| CITY OF CUMBERLAND MD0010008 | CUMBERLAND | 27,039 | — | — | Compliant |
| SEVERNA PARK-ANNE ARUNDEL CO MD0002439 | GLEN BURNIE | 26,228 | — | — | Compliant |
| CITY OF BOWIE MD0160002 | BOWIE | 25,000 | — | — | Compliant |
| FREEDOM DISTRICT MD0060002 | WESTMINSTER | 24,867 | — | — | Compliant |
| BROAD CREEK MD0020004 | MILLERSVILLE | 23,179 | — | — | Compliant |
| PATUXENT NAVAL AIR STATION (NAVFAC-WASH) MD0180022 | PATUXENT RIVER | 22,000 | — | — | Compliant |
| SALISBURY MD0002724 | SALISBURY | 20,000 | — | — | Compliant |
| CAMBRIDGE MD0002253 | CAMBRIDGE | 19,000 | — | — | Compliant |
| CITY OF ABERDEEN MD0120001 | ABERDEEN | 18,006 | 7.6 | 8.6 | Exceeds |
| EASTON UTILITIES MD0200003 | EASTON | 17,357 | — | — | Compliant |
| TOWN OF ELKTON MD0070011 | ELKTON | 15,625 | 23.3 | 7.1 | Exceeds |
| CITY OF CAMBRIDGE WATER MD0090002 | CAMBRIDGE | 15,000 | — | — | Compliant |
| CHAPEL HILL - ABERDEEN PROVING GROUNDS MD0120002 | ABERDEEN | 15,000 | — | — | Compliant |
| CITY OF HAVRE DE GRACE MD0120012 | HAVRE DE GRACE | 14,000 | — | — | Compliant |
| ABERDEEN COMMISSIONERS MD0002179 | ABERDEEN | 12,375 | — | — | Compliant |
| MD CITY MD0020021 | ARNOLD | 12,000 | — | — | Compliant |
| OCEAN PINES MD0230005 | BERLIN | 11,890 | — | — | Compliant |
| TOWN OF LA PLATA MD0080025 | LA PLATA | 11,535 | — | — | Compliant |
| ABERDEEN PROV GRDS % US ARMY MD0002848 | ABERDEEN | 11,000 | — | — | Compliant |
| KINGS HEIGHTS-ANNE ARUNDEL CO MD0002435 | GLEN BURNIE | 10,884 | — | — | Compliant |
| BEL AIR MD0002215 | BEL AIR | 10,200 | — | — | Compliant |
| LEXINGTON PK-ST MARYS CNTY MET MD0002533 | LEXINGTON PK | 10,000 | — | — | Compliant |
| ANNE ARUNDEL CO DPW AMBERLY MD0002902 | GLEN BURNIE | 10,000 | — | — | Compliant |
| HAVRE DE GRACE MUN UTIL COMM MD0002471 | HAVRE DE GRACE | 10,000 | — | — | Compliant |
| LAVALE SANITARY COMMISSION MD0002528 | LAVALE | 10,000 | — | — | Compliant |
| TOWN OF MOUNT AIRY MD0060007 | MOUNT AIRY | 9,890 | 12.7 | 6 | Exceeds |
| CHESAPEAKE RANCH ESTATES MD0040004 | LUSBY | 9,500 | — | — | Compliant |
| WALDORF SANITARY DISTRICT MD0002797 | WALDORF | 9,357 | — | — | Compliant |
| WALDORF MD0080050 | WALDORF | 9,357 | — | — | Compliant |
| CROFTON-ANNE ARUNDEL CO MD0002433 | GLEN BURNIE | 9,200 | — | — | Compliant |
| STEVENSVILLE MD0170019 | STEVENSVILLE | 9,155 | — | — | Compliant |
| FROSTBURG MD0002408 | FROSTBURG | 9,000 | — | — | Compliant |
| U.S. NAVAL ACADEMY MD0020042 | ANNAPOLIS | 8,700 | — | — | Compliant |
| TOWN OF NORTH EAST MD0070016 | NORTH EAST | 8,600 | — | — | Compliant |
| CROFTON-ANNE ARUNDEL DPW MD0020007 | CROFTON | 8,600 | — | — | Compliant |
| KING HEIGHTS-ANNE ARUNDEL DPW MD0020018 | ODENTON | 8,600 | — | — | Compliant |
| ELKTON MD0002343 | ELKTON | 8,500 | — | — | Compliant |
| TOWN OF WALKERSVILLE MD0100025 | WALKERSVILLE | 8,440 | — | — | Compliant |
| JOPPATOWNE UTILITIES CORP MD0002505 | JOPPA | 8,061 | — | — | Compliant |
| FORT DETRICK MD0100011 | FREDERICK | 7,900 | — | — | Compliant |
| EASTON UTILITIES COMMISSION MD0002333 | EASTON | 7,800 | — | — | Compliant |
| FREEDOM DIST-CARROLL CO SAN CO MD0002814 | WESTMINSTER | 7,500 | — | — | Compliant |
| WESTMINSTER MD0002821 | WESTMINSTER | 7,500 | — | — | Compliant |
| CITY OF BRUNSWICK MD0100005 | BRUNSWICK | 7,312 | — | — | Compliant |
| ALL PURE SPRING WATER, INC. PA9996259 | OAKLAND | 7,000 | — | — | Compliant |
| CITY OF TANEYTOWN MD0060012 | TANEYTOWN | 6,750 | 4.6 | 10.7 | Exceeds |
| PERRYMAN MD0002220 | BEL AIR | 6,696 | — | — | Compliant |
| TOWN OF HAMPSTEAD MD0060003 | HAMPSTEAD | 6,600 | 9.1 | 5.7 | Exceeds |
| SPRINGFIELD STATE HOSPITAL MD0002772 | SYKESVILLE | 6,500 | — | — | Compliant |
| MARYLAND HOUSE OF CORRECTION MD0020022 | JESSUP | 6,500 | — | — | Compliant |
| MARYLAND HOUSE OF CORRECTION MD0002500 | JESSUP | 6,500 | — | — | Compliant |
| BRYANS ROAD MD0080033 | LA PLATA | 6,260 | — | — | Compliant |
| TOWN OF THURMONT MD0100023 | THURMONT | 6,200 | 15 | 48 | Exceeds |
| TOWN OF POOLESVILLE MD0150002 | POOLESVILLE | 6,005 | 5.4 | 6.5 | Exceeds |
| MYSTIC HARBOUR MD0230011 | BERLIN | 5,945 | — | — | Compliant |
| CITY OF FRUITLAND MD0220008 | FRUITLAND | 5,907 | — | 4.1 | Exceeds |
| EASTERN REGION ALLEGANY DISTRIB. SYSTEM MD0010005 | CUMBERLAND | 5,703 | — | — | Compliant |
| DEEP CREEK LAKE WATER SERVICE AREA MD1111096 | MOUNTAIN LAKE PARK | 5,502 | — | — | Compliant |
| NAVAL TRAINING CENTER MD0002202 | BAINBRIDGE | 5,500 | — | — | Compliant |
| LAVALE SANITARY COMMISSION MD0010016 | LAVALE | 5,500 | — | — | Compliant |
| MARYLAND AMERICAN WATER--SEVERN SYSTEM MD0020027 | BEL AIR | 5,447 | — | — | Compliant |
| TOWN OF CHESTERTOWN MD0140002 | CHESTERTOWN | 5,400 | — | — | Compliant |
| FRANCIS SCOTT KEY MD0100028 | FREDERICK | 5,400 | — | — | Compliant |
| SPARROWS PT METHLEHEM STEEL CO MD0002758 | SPARROWS POINT | 5,000 | — | — | Compliant |
| TOWN OF CHESAPEAKE BEACH MD0040003 | CHESAPEAKE BEACH | 5,000 | — | — | Compliant |
| TOWN OF LEONARDTOWN MD0180006 | LEONARDTOWN | 5,000 | — | — | Compliant |
| MIDLAND-LONACONING MD0010018 | LONACONING | 5,000 | — | — | Compliant |
| SEVERNA PARK-ANNE ARUNDEL CO MD0020033 | SEVERNA PARK | 5,000 | — | — | Compliant |
| AMBERLY MD0020049 | ANNAPOLIS | 5,000 | — | — | Compliant |
| WESTERN REGION ALLEGANY DISTRIB. SYSTEM MD0010009 | CUMBERLAND | 4,955 | — | — | Compliant |
| TOWN OF MANCHESTER MD0060006 | MANCHESTER | 4,954 | 4.7 | — | Exceeds |
| CHESAPEAKE COMPLEX MD1020003 | PASADENA | 4,785 | — | — | Compliant |
| ARNOLD-PINES ON THE SEVERN MD0020026 | GLEN BURNIE | 4,588 | — | — | Compliant |
| ARNOLD-PINES ON THE SEVERN MD0002430 | GLEN BURNIE | 4,588 | — | — | Compliant |
| CRISFIELD MAYOR AND COUNCIL MD0002295 | CRISFIELD | 4,578 | — | — | Compliant |
| THELMA AVE. MD0020053 | ARNOLD | 4,500 | — | — | Compliant |
| TOWN OF DELMAR MD0220001 | DELMAR | 4,500 | — | — | Compliant |
| ELVATON ROAD MD0020055 | ARNOLD | 4,500 | — | — | Compliant |
| QUARTERFIELD MD0020054 | ANNAPOLIS | 4,500 | — | — | Compliant |
| GLENDALE AA CO. D.U. MD0020056 | ARNOLD | 4,500 | — | — | Compliant |
| CRAIN HIGHWAY MD0020052 | ARNOLD | 4,500 | — | — | Compliant |
| TOWN OF BERLIN MD0230001 | BERLIN | 4,500 | — | — | Compliant |
| TOWN OF DENTON MD0050001 | DENTON | 4,500 | — | — | Compliant |
| STEVENSON ROAD AA CO. D.U. MD0020051 | ARNOLD | 4,500 | — | — | Compliant |
| TOWNE PLAZA MD0080077 | ST CHARLES | 4,450 | — | — | Compliant |
| WALDORF MD0080070 | BEANTOWN | 4,450 | — | — | Compliant |
| WESTWOOD DR MD0080072 | LAPLATA | 4,450 | — | — | Compliant |
| SMALLWOOD WEST MD0080080 | ST CHARLES | 4,450 | — | — | Compliant |
| WHITE OAK MD0080078 | ST CHARLES | 4,450 | — | — | Compliant |
| ST. PAUL MD0080076 | ST CHARLES | 4,450 | — | — | Compliant |
| BILLINGSLEY ROAD MD0080071 | BILLINGSLEY | 4,450 | — | — | Compliant |
| PINEFIELD MD0080074 | ST CHARLES | 4,450 | — | — | Compliant |
| PINEY CHURCH MD0080079 | ST CHARLES | 4,450 | — | — | Compliant |
| JOHN HANSON MD0080073 | WALDORF | 4,450 | — | — | Compliant |
| ST. CHARLES MD0080075 | LA PLATA | 4,450 | — | — | Compliant |
| TOWN OF PERRYVILLE MD0070018 | PERRYVILLE | 4,413 | — | — | Compliant |
| MARYLAND CITY-ANNE ARUNDEL CO MD0002436 | GLEN BURNIE | 4,404 | — | — | Compliant |
| PRINCE FREDERICK MD0040011 | PRINCE FREDERICK | 4,371 | — | — | Compliant |
| TOWN OF MIDDLETOWN MD0100018 | MIDDLETOWN | 4,288 | 4.8 | 6.1 | Exceeds |
| BOONSBORO - KEEDYSVILLE MD0210002 | BOONSBORO | 4,250 | 6.7 | — | Exceeds |
| BELVEDERE HEIGHTS-A A CO MD0020003 | GLEN BURNIE | 4,120 | — | — | Compliant |
| BELVEDERE HEIGHTS-A A CO MD0002431 | GLEN BURNIE | 4,120 | — | — | Compliant |
| TOWN OF INDIAN HEAD MD0080020 | INDIAN HEAD | 4,100 | — | — | Compliant |
| CITY OF POCOMOKE CITY MD0230006 | POCOMOKE CITY | 4,100 | — | — | Compliant |
| BETHLEHEM STEEL CORP MD0002757 | SPARROWS POINT | 4,000 | — | — | Compliant |
| SUPERINTENDANT OF CORRECTIONS MD0002862 | — | 4,000 | — | — | Compliant |
| CHESTERTOWN MD0002276 | CHESTERTOWN | 4,000 | — | — | Compliant |
| THE PROVINCES MD0020029 | DUNKIRK | 3,991 | — | — | Compliant |
| SOLOMONS MD0040027 | PRINCE FREDERICK | 3,811 | — | — | Compliant |
| POCOMOKE CITY MAYOR AND COUNCI MD0002666 | POCOMOKE CITY | 3,800 | — | — | Compliant |
| TOWN OF CHARLESTOWN MD0070029 | WILLARDS | 3,791 | — | — | Compliant |
| BRUNSWICK MAYOR AND COUNCIL MD0002245 | BRUNSWICK | 3,600 | — | — | Compliant |
| SNOW VALLEY WATER COMPANY PA9996238 | ANNAPOLIS | 3,500 | — | — | Compliant |
| EASTERN CORRECTIONAL INSTITUTE MD0190013 | MILLERSVILLE | 3,500 | — | — | Compliant |
| GREEN SPRING WATER COMPANY PA9996133 | BIG SPRING | 3,500 | — | — | Compliant |
| WESTERNPORT MD0002812 | WESTERNPORT | 3,500 | — | — | Compliant |
| TOWN OF CENTREVILLE MD0170001 | CENTREVILLE | 3,322 | — | — | Compliant |
| NAVAL SUPPORT FACILITY, INDIAN HEAD MD0080058 | INDIAN HEAD | 3,321 | — | — | Compliant |
| TOWN OF PRINCESS ANNE MD0190002 | PRINCESS ANNE | 3,300 | — | — | Compliant |
| MARLBORO MEADOWS (CONNECTED TO WSSC) MD0160006 | SILVER SPRING | 3,173 | — | — | Compliant |
| COUNTRY LAKES MD0180023 | CALIFORNIA | 3,016 | — | — | Compliant |
| TOWN OF MOUNTAIN LAKE PARK MD0110007 | OAKLAND | 3,000 | — | — | Compliant |
| TOWN OF NORTH BEACH MD0040030 | NORTH BEACH | 3,000 | — | — | Compliant |
| DELMAR WATER COMMISSION MD0002315 | DELMAR | 3,000 | — | — | Compliant |
| TOWN OF OAKLAND BROADFORD PLNT MD0110009 | OAKLAND | 3,000 | — | — | Compliant |
| PERRY POINT V A HOSPITAL MD0002652 | PERRY POINT | 3,000 | — | — | Compliant |
| CITY OF CRISFIELD MD0190001 | CHRISFIELD | 2,976 | — | — | Compliant |
| MANOR SHOPPING CENTER MD1030054 | PHOENIX | 2,921 | — | — | Compliant |
| PRINCESS ANNE-SOMERSET CNTY SA MD0002694 | PRINCESS ANNE | 2,900 | — | — | Compliant |
| THURMONT-MECHANICSTOWN WATER C MD0002778 | THURMONT | 2,800 | — | — | Compliant |
| SNOW HILL MD0002752 | SNOW HILL | 2,800 | — | — | Compliant |
| CEDAR COVE MD0180002 | CALIFORNIA | 2,728 | — | — | Compliant |
| TOWN OF ST. MICHAELS MD0200006 | ST MICHAELS | 2,650 | — | — | Compliant |
| BEL AIR - PINTO DISTRIBUTION SYSTEM MD0010003 | DUNKIRK | 2,614 | — | — | Compliant |
| FOUNTAINDALE SOUTH MD0100013 | FREDERICK | 2,610 | — | — | Compliant |
| LAKE VILLAGE TOWNHOUSES MD0002206 | BALTIMORE | 2,560 | — | — | Compliant |
| BEL FOREST MD0002216 | BEL AIR | 2,540 | — | — | Compliant |
| CENTREVILLE TOWN COMMISSIONERS MD0002262 | CENTREVLL | 2,500 | — | — | Compliant |
| FEDERALSBURG MAYOR AND COUNCIL MD0002371 | FEDERALSBURG | 2,500 | — | — | Compliant |
| LONOCONING WATER CO MD0002545 | LONACONING | 2,500 | — | — | Compliant |
| DENTON COMMISSIONERS MD0002321 | DENTON | 2,500 | — | — | Compliant |
| TOWN OF SMITHSBURG DISTRIBUTION SYSTEM MD0210018 | SMITHSBURG | 2,500 | — | — | Compliant |
| CENTERVILLE TWN COMMISSONERS MD0002845 | CENTERVILLE | 2,500 | — | — | Compliant |
| TOWN OF FEDERALSBURG MD0050002 | FEDERALSBURG | 2,450 | — | — | Compliant |
| WAKEFIELD VALLEY MD0060017 | WESTMINSTER | 2,436 | — | — | Compliant |
| TOWN OF SNOW HILL MD0230007 | SNOW HILL | 2,409 | — | — | Compliant |
| TOWN OF WILLIAMSPORT DISTRIBUTION SYSTEM MD0210021 | WILLIAMSPORT | 2,400 | — | — | Compliant |
| TOWN OF EMMITSBURG MD0100010 | EMMITSBURG | 2,400 | — | — | Compliant |
| LAKE VILLAGE TOWNHOMES MD0020019 | SEVERN | 2,400 | — | — | Compliant |
| PERRYVILLE MAYOR & TOWN COUNCI MD0002653 | PERRYVILLE | 2,400 | — | — | Compliant |
| PIONEER CITY-WARFIELD WATER CO MD0002284 | COCKEYSVILLE | 2,400 | — | — | Compliant |
| GREENRIDGE SUBDIVISION MD0120011 | DUNKIRK | 2,271 | — | — | Compliant |
| HERALD HARBOR MD0020044 | MILLERSVILLE | 2,241 | — | — | Compliant |
| TOWN OF WESTERNPORT MD0010033 | WESTERNPORT | 2,200 | — | — | Compliant |
| MARYLAND CORRECTIONAL INSTITUT MD0002455 | HAGERSTOWN | 2,200 | — | — | Compliant |
| CRESAPTOWN CIVIC IMPROVEMENT A MD0002294 | CRESAPTOWN | 2,200 | — | — | Compliant |
| SAINT MARYS COLLEGE MD0180013 | MILLERSVILLE | 2,200 | — | — | Compliant |
| TOWN OF RISING SUN MD0070021 | ELKTON | 2,200 | — | — | Compliant |
| TOWN OF HURLOCK MD0090005 | HURLOCK | 2,150 | — | — | Compliant |
| WILLIAMSPORT MAYOR AND COUNCIL MD0002832 | WILLIAMSPORT | 2,000 | — | — | Compliant |
| EMMITSBURG-BURGESS&COMMISSIONE MD0002364 | EMMITSBURG | 2,000 | — | — | Compliant |
| BEACHES WATER CO-OPERATIVE MD0040009 | ST. LEONARD | 2,000 | — | — | Compliant |
| NORTH EAST MD0002604 | NORTH EAST | 2,000 | — | — | Compliant |
| TANEYTOWN MAYOR AND COUNCIL MD0002776 | TANEYTOWN | 2,000 | — | — | Compliant |
| FT DIETRICK ARMY BASE MD0002852 | FREDERICK | 2,000 | — | — | Compliant |
| OAKLAND MD0002611 | OAKLAND | 2,000 | — | — | Compliant |
| PERRY POINT V.A. MEDICAL CENTER MD0070017 | PERRY POINT | 2,000 | — | — | Compliant |
| MOUNTAIN LAKE PARK-LOCH LYNN H MD0002612 | OAKLAND | 2,000 | — | — | Compliant |
| POTOMAC HTS MUT HOMEOWNERS ASS MD0002494 | INDIAN HEAD | 2,000 | — | — | Compliant |
| BERLIN MD0002225 | BERLIN | 1,975 | — | — | Compliant |
| TOWN OF HANCOCK MD0210012 | HANCOCK | 1,921 | — | — | Compliant |
| MOUNT SAINT MARYS UNIVERSITY MD0100019 | EMMITSBURG | 1,900 | — | — | Compliant |
| REVEL SQUARE MD0020043 | ANNAPOLIS | 1,900 | — | — | Compliant |
| TOWN OF GREENSBORO MD0050003 | GREENSBORO | 1,878 | — | — | Compliant |
| TOWN OF OAKLAND MD0110008 | OAKLAND | 1,850 | — | — | Compliant |
| BOONSBORO&KEEDYSVILLE MD0002238 | BOONSBORO | 1,835 | — | — | Compliant |
| HANCOCK MAYOR AND COUNCIL MD0002465 | HANCOCK | 1,800 | — | — | Compliant |
| POTOMAC HEIGHTS MD0080038 | INDIAN HEAD | 1,800 | — | — | Compliant |
| SWANN KEYS DE0000465 | SALISBURY | 1,764 | — | — | Compliant |
| CROWNSVILLE STATE HOSPITAL MD0002298 | CROWNSVLL | 1,750 | — | — | Compliant |
| TOWN OF ROCK HALL MD0140006 | ROCK HALL | 1,750 | — | — | Compliant |
| TOWN OF NEW WINDSOR MD0060008 | NEW WINDSOR | 1,732 | — | — | Compliant |
| LA PLATA MD0002513 | LA PLATA | 1,700 | — | — | Compliant |
| LEONARDTOWN MD0002529 | LEONARDTOWN | 1,700 | — | — | Compliant |
| THOMPSON EST HOLLY HALL TER MD0002348 | ELKTON | 1,700 | — | — | Compliant |
| TOWN OF RIDGELY MD0050006 | RIDGELY | 1,600 | — | — | Compliant |
| LAKESIDE VILLAGE MD0210215 | HAGERSTOWN | 1,575 | — | — | Compliant |
| KNOLLS OF WINDSOR MD0100041 | FREDERICK | 1,553 | — | — | Compliant |
| MOUNT AIRY MAYOR & TOWN COUNCI MD0002581 | MT AIRY | 1,550 | — | — | Compliant |
| TOWN OF MYERSVILLE MD0100020 | MYERSVILLE | 1,516 | — | — | Compliant |
| WATERSIDE MD0100029 | FREDERICK | 1,509 | — | — | Compliant |
| SHARPSBURG-WASHINGTON CO SAN C MD0002454 | HAGERSTOWN | 1,500 | — | — | Compliant |
| TOWN OF PITTSVILLE MD0220009 | PITTSVILLE | 1,500 | — | — | Compliant |
| STRAWBERRY HILLS - SEE 0080033 MD0080044 | LA PLATA | 1,500 | — | — | Compliant |
| SPRINGFIELD HOSPITAL DISTRIBUTION MD0060010 | SYKESVILLE | 1,500 | — | — | Compliant |
| ST MICHAELS MD0002723 | ST MICHAELS | 1,500 | — | — | Compliant |
| ST MICHAELS TOWN COMM MD0002836 | ST MICHAELS | 1,500 | — | — | Compliant |
| INDIAN HEAD MD0002491 | INDIAN HEAD | 1,500 | — | — | Compliant |
| MANCHESTER MAYHOR AND COUNCEL MD0002562 | MANCHESTER | 1,451 | — | — | Compliant |
| CHESAPEAKE RANCH WATER CO INC MD0002551 | LUSBY | 1,448 | — | — | Compliant |
| SCIENTISTS CLIFFS MD0040014 | PORT REPUBLIC | 1,425 | — | — | Compliant |
| TOWN CREEK MANOR WATER CO MD0002478 | HOLLYWOOD | 1,400 | — | — | Compliant |
| TOWN CREEK MANOR WATER CO MD0180014 | HOLLYWOOD | 1,400 | — | — | Compliant |
| SHERWOOD FOREST COMPANY MD0002212 | BALTIMORE | 1,400 | — | — | Compliant |
| WALKERSVILLE BURGESS & COMM MD0002810 | WALKERSVILLE | 1,400 | — | — | Compliant |
| ALLVIEW ESTATES-WITTCO WATER C MD0002356 | ELLICOTT CITY | 1,400 | — | — | Compliant |
| BRADDOCK WATER CO MD0002390 | FREDERICK | 1,400 | — | — | Compliant |
| ALLVIEW ESTATES-WITTCO WATER C MD0130001 | ELLICOTT CITY | 1,400 | — | — | Compliant |
| DEPT OF PUBLIC WORKS MD0002851 | FREDRICK | 1,400 | — | — | Compliant |
| TOWN OF SHARPSBURG MD0210017 | WILLIAMSPORT | 1,360 | — | — | Compliant |
| CROWNSVILLE HOSPITAL CENTER MD0020009 | MILLERSVILLE | 1,348 | — | — | Compliant |
| COLONY SQUARE MD0180026 | LEXINGTON PARK | 1,325 | — | — | Compliant |
| PEGGS ROAD MD0180028 | LEXINGTON PARK | 1,325 | — | — | Compliant |
| WILLOW RUN MD0180025 | LEXINGTON PARK | 1,325 | — | — | Compliant |
| BANK SQUARE MD0180027 | LEXINGTON PARK | 1,325 | — | — | Compliant |
| LAUREL BRANCH MD0080060 | LA PLATA | 1,305 | — | — | Compliant |
| TOWN OF FUNKSTOWN DISTRIBUTION SYSTEM MD0210008 | FUNKSTOWN | 1,300 | — | — | Compliant |
| WICOMICO SHORES MD0180018 | CALIFORNIA | 1,262 | — | — | Compliant |
| MIDDLETOWN MD0002571 | MIDDLETOWN | 1,250 | — | — | Compliant |
| FAIRLAND CROSSING APARTMENTS MD0150102 | SILVER SPRING | 1,248 | — | — | Compliant |
| LONG BEACH WATER CO MD0002720 | ST LEONARD | 1,244 | — | — | Compliant |
| DAVID TAYLOR RESEA DEV CTR MD0002871 | ANNAPOLIS | 1,200 | — | — | Compliant |
| BLUE RIDGE SUMMIT HIGHFIELD W MD0002237 | BLUE RIDGE SUMMIT | 1,200 | — | — | Compliant |
| GREENRIDGE UTILITIES INC MD0002217 | BEL AIR | 1,200 | — | — | Compliant |
| MEADOWVIEW UTILITIES CO PRELL MD0002350 | ELKTON | 1,200 | — | — | Compliant |
| ROCK HALL COMMISSIONERS MD0002716 | ROCK HALL | 1,200 | — | — | Compliant |
| GREENSBORO MD0002451 | GREENSBORO | 1,200 | — | — | Compliant |
| SHERWOOD FOREST WATER COMPANY MD0020035 | SHERWOOD FOREST | 1,200 | — | — | Compliant |
| FUNKSTOWN MAYOR & COUNCIL MD0002423 | FUNKSTOWN | 1,200 | — | — | Compliant |
| SYKESVILLE MD0002820 | WESTMINSTER | 1,200 | — | — | Compliant |
| PASADENA WATER COMPANY MD0020025 | PASADENA | 1,196 | — | — | Compliant |
| PASADENA WATER COMPANY MD0002648 | PASADENA | 1,196 | — | — | Compliant |
| CHESAPEAKE HEIGHTS (BAYSIDE FOREST) MD0040018 | PRINCE FREDERICK | 1,190 | — | — | Compliant |
| GREENBRIER MD0180045 | CALIFORNIA | 1,161 | — | — | Compliant |
| HURLOCK MD0002484 | HURLOCK | 1,150 | — | — | Compliant |
| HIGHFIELD MD0210001 | SMITHSBURG | 1,141 | — | — | Compliant |
| CHARLES UTILITIES INC MD0002249 | BRYANS ROAD | 1,140 | — | — | Compliant |
| LONG BAR HARBOR MD0002218 | BEL AIR | 1,116 | — | — | Compliant |
| SUMMIT/HIGHLANDS MD0040026 | PRINCE FREDERICK | 1,108 | — | — | Compliant |
| BARTON DISTRIBUTION SYSTEM MD0010002 | LONACONING | 1,100 | — | — | Compliant |
| POINT OF ROCKS MD0100022 | FREDERICK | 1,058 | — | — | Compliant |
| SAM HILL ESTATES MD0100040 | FREDERICK | 1,036 | — | — | Compliant |
| BAYSIDE-QUEENSLANDING MD0170007 | STEVENSVILLE | 1,030 | — | — | Compliant |
| TOWN OF HEBRON MD0220002 | HEBRON | 1,022 | — | — | Compliant |
| BRETON BAY MD0180001 | CALIFORNIA | 1,012 | — | — | Compliant |
| GREENVIEW KNOLLS MD0180004 | HOLLYWOOD | 1,009 | — | — | Compliant |
| SMITHSBURG MAYOR AND COUNCIL MD0002750 | SMITHSBURG | 1,000 | — | — | Compliant |
| BETTERTON MD0002233 | BETTERTON | 1,000 | — | — | Compliant |
| ST MARYS COLLEGE MD0002722 | ST MARYS CITY | 1,000 | — | — | Compliant |
| ALLEGANY SAN COMM MD0010044 | CUMBERLAND | 1,000 | — | — | Compliant |
| UNION BRIDGE MD0002784 | UNION BRIDGE | 1,000 | — | — | Compliant |
| LUKE-WESTVACO MD0002550 | LUKE | 1,000 | — | — | Compliant |
| TOWN OF UNION BRIDGE MD0060013 | UNION BRIDGE | 997 | — | — | Compliant |
| HAMPSTEAD MD0002463 | HAMPSTEAD | 961 | — | — | Compliant |
| RISING SUN MD0002711 | RISING SUN | 956 | — | — | Compliant |
| WORTON MD0140007 | CHESTERTOWN | 955 | — | — | Compliant |
| CAMBRIDGE FARMS MD0100033 | FREDERICK | 953 | — | — | Compliant |
| TOWN & COUNTRY MOBILE HOME PARK MD0070235 | NORTH EAST | 950 | — | — | Compliant |
| GLENELG COUNTRY SCHOOL MD1130003 | ELLICOTT CITY | 950 | 10 | — | Exceeds |
| SWAN POINT MD0080046 | LA PLATA | 945 | — | — | Compliant |
| MCDONOUGH SCHOOL MD0030006 | MCDONOUGH | 913 | — | — | Compliant |
| MCDONOUGH SCHOOL MD0002553 | MCDONOUGH | 913 | — | — | Compliant |
| PROSPECT BAY MD0170009 | STEVENSVILLE | 913 | — | — | Compliant |
| RIDGELY COMMISSIONERS MD0002709 | RIDGELY | 900 | — | — | Compliant |
| HOLIDAY MOBILE ESTATES, INC. MD0020211 | JESSUP | 900 | — | — | Compliant |
| SHARPTOWN MAYOR AND TOWN COUNC MD0002744 | SHARPTOWN | 900 | — | — | Compliant |
| PORT DEPOSIT MAYOR AND COUNCIL MD0002670 | PORT DEPOSIT | 900 | — | — | Compliant |
| LORD CALVERT TRAILER PARK MD0180213 | LEXINGTON PARK | 892 | — | — | Compliant |
| CLOVERHILL 3 - CONSECUTIVE TO MD0100015 MD0100031 | FREDERICK | 888 | — | — | Compliant |
| TOWN OF GRANTSVILLE MD0110005 | GRANTSVILLE | 885 | — | — | Compliant |
| STELLA MARIS MD0030212 | TIMONIUM | 873 | — | — | Compliant |
| SOUTHERN REGION ALLEGANY DISTRIB. SYSTEM MD0010045 | CUMBERLAND | 865 | — | — | Compliant |
| ILUR LIBERTY COMMONS MHP LLC IL0195400 | CROFTON | 865 | — | — | Compliant |
| TOWN OF WOODSBORO MD0100027 | WOODSBORO | 846 | — | — | Compliant |
| WOODSPRING - SEE 010-0017 MD0100034 | FREDERICK | 840 | — | — | Compliant |
| MARYLAND MANOR MOBILE HOME PARK MD0020214 | LOTHIAN | 810 | — | — | Compliant |
| BARTON WATER COMPANY MD0002214 | BARTON | 800 | — | — | Compliant |
| CEDARVILLE MOBILE HOME PARK MD0002243 | BRANDYWINE | 789 | — | — | Compliant |
| MARYLAND MANOR HOMES MD0002470 | HARWOOD | 780 | — | — | Compliant |
| CEDARVILLE MOBILE HOME PARK MD0160207 | BRANDYWINE | 780 | — | — | Compliant |
| HOLIDAY MOBILE ESTATES INC MD0002501 | JESSUP | 774 | — | — | Compliant |
| EUTAW FOREST MD0080059 | LA PLATA | 760 | — | — | Compliant |
| HEBRON COMMISSIONERS MD0002474 | HEBRON | 755 | — | — | Compliant |
| NEW WINDSOR MD0002601 | NEW WINDSOR | 750 | — | — | Compliant |
| TOWN OF PRESTON MD0050005 | PRESTON | 750 | — | — | Compliant |
| FAIRMOUNT MD0190012 | PRINCESS ANNE | 750 | — | — | Compliant |
| LYONS CREEK MOBILE HOME ESTATE MD0002549 | LOTHIAN | 750 | — | — | Compliant |
| LYONS CREEK ESTATES MD0020213 | LOTHIAN | 750 | — | — | Compliant |
| CLIFFTON ON THE POTOMAC MD0080009 | LA PLATA | 744 | — | — | Compliant |
| MEADE VILLAGE MD0020023 | MILLERSVILLE | 740 | — | — | Compliant |
| GIBSON ISLAND-ANNE ARUNDEL CO MD0002434 | GLEN BURNIE | 732 | — | — | Compliant |
| TOWN OF OXFORD MD0200005 | OXFORD | 726 | — | — | Compliant |
| FAIRLEE MD0140003 | CHESTERTOWN | 725 | — | — | Compliant |
| HUNTING QUARTERS MD0180038 | CALIFORNIA | 715 | — | — | Compliant |
| TOWN OF QUEENSTOWN MD0170003 | QUEENSTOWN | 705 | — | — | Compliant |
| SYLVAN SHORES SERVICES CO. MD0020037 | RIVA | 700 | — | — | Compliant |
| CONOWINGO-SUSQUEHANNA POWER CO MD0002288 | CONOWINGO | 700 | — | — | Compliant |
| ROLLING ACRES MD0180017 | CALIFORNIA | 699 | — | — | Compliant |
| MOUNT AETNA MD0210015 | HAGERSTOWN | 688 | — | — | Compliant |
| MARTINGHAM UTILITIES COOPERATIVE MD0200004 | ST. MICHAELS | 675 | — | — | Compliant |
| TOWN OF CHESAPEAKE CITY [FORMERLY SOUTH] MD0070006 | CHESAPEAKE CITY | 673 | — | — | Compliant |
| PINEY POINT MD0180034 | CALIFORNIA | 672 | — | — | Compliant |
| SCIENTISTS CLIFFS SERVICE CO I MD0002677 | PORT REPUBLIC | 651 | — | — | Compliant |
| FRIENDSVILLE CITY WATER CO MD0002405 | FRIENDSVILLE | 650 | — | — | Compliant |
| BOONES MOBILE ESTATES MD0020231 | LOTHIAN | 650 | — | — | Compliant |
| DARES BEACH WATER COMPANY MD0002687 | PRNC FREDRICK | 644 | — | — | Compliant |
| CHESAPEAKE BEACH MD0002270 | CHESAPEAKE BCH | 640 | — | — | Compliant |
| TRAPPE TOWN COUNCIL MD0002781 | TRAPPE | 626 | — | — | Compliant |
| TOWN OF MILLINGTON MD0140010 | MILLINGTON | 625 | — | — | Compliant |
| TOWN OF SHARPTOWN MD0220005 | SHARPTOWN | 625 | — | — | Compliant |
| TOWN OF FRIENDSVILLE MD0110004 | OAKLAND | 622 | — | — | Compliant |
| ST. CLEMENTS SHORES MD0180012 | CALIFORNIA | 620 | — | — | Compliant |
| ST CLEMENTS SHORES WATER CO IN MD0002531 | LEONARDTOWN | 616 | — | — | Compliant |
| CHARLOTTE HALL MD1180005 | CALIFORNIA | 615 | — | — | Compliant |
| HUNTERS BROOKE/FALCON RIDGE SUBD MD0080083 | LA PLATA | 614 | — | — | Compliant |
| CARLOS WATER CO & BORDEN SHAFT MD0002412 | FROSTBURG | 600 | — | — | Compliant |
| OYSTER COVE MD0170011 | STEVENSVILLE | 600 | — | — | Compliant |
| EPPING FOREST INC MD0002193 | ANNAPOLIS | 600 | — | — | Compliant |
| GRASONVILLE MD0170020 | STEVENSVILLE | 600 | — | — | Compliant |
| BRIDGE POINTE-KENT ISLAND VILLAGE MD0170017 | STEVENSVILLE | 600 | — | — | Compliant |
| SALISBURY MOBILE HOME PARK MD0002733 | SALISBURY | 588 | — | — | Compliant |
| CECILTON MD0002261 | CECILTON | 586 | — | — | Compliant |
| FORREST FARM SUBDIVISION MD0180054 | CALIFORNIA | 577 | — | — | Compliant |
| KESWICK MULTI-CARE CENTER MD0300005 | BALTIMORE | 575 | — | — | Compliant |
| TOWN OF GALENA MD0140004 | CHESTERTOWN | 560 | — | — | Compliant |
| BLOOMINGTON WATER CO MD0002235 | BLOOMINGTON | 560 | — | — | Compliant |
| LAUREL RIDGE MD0180037 | CALIFORNIA | 560 | — | — | Compliant |
| CHARLES COUNTY GARDENS WATER MD0080008 | WALDORF | 551 | — | — | Compliant |
| PRESTON TOWN COMMISSIONERS MD0002680 | PRESTON | 550 | — | — | Compliant |
| SOMERSET TRUCK GROWERS COOP MD0002815 | WESTOVER | 542 | — | — | Compliant |
| CHESAPEAKE MOBILE HOME COURT MD0002444 | GLENIBURNIE | 540 | — | — | Compliant |
| CHESAPEAKE MOBILE COURT MD0020207 | HANOVER | 540 | — | — | Compliant |
| TOWN OF SECRETARY MD0090007 | SECRETARY | 535 | — | — | Compliant |
| CHESAPEAKE CITY SOUTH MD0002274 | CHESAPEAKE CITY | 531 | — | — | Compliant |
| HILLS TRAILER PARK MD0002539 | LEXINGTON PARK | 528 | — | — | Compliant |
| GRANTSVILLE MAYOR AND COUNCIL MD0002445 | GRANTSVILLE | 517 | — | — | Compliant |
| NEW MARKET WEST MD0100039 | FREDERICK | 516 | — | — | Compliant |
| PERSIMMON HILLS MD0180046 | CALIFORNIA | 514 | — | — | Compliant |
| WILDERNESS RUN MD0180036 | CALIFORNIA | 511 | — | — | Compliant |
| SUNNY CREEK MHC TX2460144 | CROFTON | 510 | — | — | Compliant |
| SOUTHDOWN SHORES CORPORATION MD0002340 | EDGEWATER | 504 | — | — | Compliant |
| SYLVAN SHORES SERVICES CO INC MD0002715 | RIVA | 504 | — | — | Compliant |
| SOUTHDOWN SHORES CORPORATION MD0020036 | EDGEWATER | 504 | — | — | Compliant |
| FT DETRICK SITE R PA7010049 | FORT RITCHIE | 501 | — | — | Compliant |
| WHITE CRYSTAL BEACH MD0002328 | EARLESVILLE | 500 | — | — | Compliant |
| SECRETARY MD0002736 | SECRETARY | 500 | — | — | Compliant |
| CLEAR SPRING MAYOR & TOWN CNCL MD0002283 | CLEAR SPRG | 500 | — | — | Compliant |
| CHESAPEAKE CITY NORTH MD0002273 | CHESAPEAKE CITY | 500 | — | — | Compliant |
| MT AETNA-HIGHLAND VIEW ACADEMY MD0002287 | COLUMBIA | 500 | — | — | Compliant |
| BOYS VILLAGE CHELTENHAM MD0002268 | CHELTENHM | 500 | — | — | Compliant |
| KLONDIKE WATER CO MD0002417 | FROSTBURG | 500 | — | — | Compliant |
| EASTERN SHORE STATE HOSPITAL MD0002255 | CAMBRIDGE | 500 | — | — | Compliant |
| OCEANPINES MD MARINE UTILITIES MD0002624 | OCEAN CITY | 500 | — | — | Compliant |
| NANTUCKET POINT(DISTRIBUTION-DELAWARE) MD0230020 | BERLIN | 500 | — | — | Compliant |
| RIDDLE FARM MD0230019 | BERLIN | 500 | — | — | Compliant |
| PRNC FRED-CALV CO SAN DIST INC MD0002685 | PRNC FREDERICK | 500 | — | — | Compliant |
| SWAN HARBOUR DELL MOBILE HOME PARK MD0120215 | HAVRE DE GRACE | 500 | — | — | Compliant |
| POOLESVILLE-COMMISSIONERS MD0002669 | POOLESVILLE | 500 | — | — | Compliant |
| HERITAGE OF RANTOUL IL0190080 | CROFTON | 500 | — | — | Compliant |
| TOWN OF SUDLERSVILLE MD0170024 | SUDLERSVILLE | 497 | — | — | Compliant |
| LORD CALVERT TRAILER PARK MD0002535 | LEXINGTON PARK | 495 | — | — | Compliant |
| TOWN & COUNTRY MOBILE HOME PAR MD0002610 | NORTH EAST | 492 | — | — | Compliant |
| BEACH HARBOR MD1170001 | GRASONVILLE | 481 | — | — | Compliant |
| TOWN OF BETTERTON MD0140001 | BETTERTON | 481 | — | — | Compliant |
| THE WILLOUGHBY WATER WORKS COM MD0120018 | TOWSON | 480 | — | — | Compliant |
| THE WILLOUGHBY WATER WORKS COM MD0002780 | TOWSON | 480 | — | — | Compliant |
| TOWN OF CECILTON MD0070004 | CECILTON | 477 | — | — | Compliant |
| OAKVILLE ELEMENTARY SCHOOL MD1180037 | LOVEVILLE | 475 | — | — | Compliant |
| GREENVIEW KNOLLS WATER CO INC MD0002448 | GREAT MILLS | 470 | — | — | Compliant |
| BRODSKYS MODERN TRAILER PARK MD0002737 | SEVEN | 468 | — | — | Compliant |
| SEVERN MOBILE HOME PARK MD0020206 | SEVERN | 468 | — | — | Compliant |
| GLEN MEADOWS RETIREMENT COMMUNITY MD0030208 | GLEN ARM | 468 | — | — | Compliant |
| THE CALVERTON SCHOOL MD1040022 | HUNTINGTOWN | 461 | — | — | Compliant |
| MISTY MEADOWS 1 / HIGHLAND HILLS M.H.P. MD0070247 | STREET | 460 | — | — | Compliant |
| TOWN OF VIENNA MD0090008 | VIENNA | 460 | — | — | Compliant |
| TOWN OF CLEAR SPRING MD0210005 | WILLIAMSPORT | 455 | — | — | Compliant |
| PATUXENT MOBILE ESTATES MD0002443 | GLEN BURNIE | 450 | — | — | Compliant |
| PATUXENT MOBILE ESTATES MD0020217 | LOTHIAN | 450 | — | — | Compliant |
| GAITHER MANOR APARTMENTS MD0060202 | SYKESVILLE | 450 | — | — | Compliant |
| TRAILER RANCHO MD0002182 | ABERDEEN | 450 | — | — | Compliant |
| TRAILER RANCHO MD0120216 | ABERDEEN | 450 | — | — | Compliant |
| VIENNA MAYOR AND COMMISSIONERS MD0002796 | VIENNA | 450 | — | — | Compliant |
| SIMPSONVILLE-W R GRACE AND CO MD0002282 | CLARKSVILLE | 449 | — | — | Compliant |
| MARYLAND MANOR MD0002251 | CALIFORNIA | 438 | — | — | Compliant |
| CAVALIER COUNTRY WATER ASSOC I MD0002686 | PRNC FREDRICK | 436 | — | — | Compliant |
| CROSS POINT SUBDIVISION MD0040052 | PRINCE FREDERICK | 434 | — | — | Compliant |
| HIGHLANDS DISTRIBUTION MD0070024 | ELKTON | 434 | — | — | Compliant |
| VALLEY ROAD DIST SYSTEM MD0010035 | CUMBERLAND | 420 | — | — | Compliant |
| SUNNYBROOK MD0030011 | BALTIMORE | 416 | — | — | Compliant |
| SUNNYBROOK BALTO CO DEPT OF PU MD0002777 | TEXAS | 416 | — | — | Compliant |
| HIGHLAND HILLS M.H.P/ SEE 007-0247 MD0070220 | KINGSVILLE | 415 | — | — | Compliant |
| CARPENTERS POINT WATER COMPANY MD0002654 | PERRYVILLE | 400 | — | — | Compliant |
| TOWN OF EAST NEW MARKET MD0090004 | EAST NEW MARKET | 400 | — | — | Compliant |
| QUEENSTOWN COMMISSIONERS MD0002696 | QUEENSTOWN | 400 | — | — | Compliant |
| EAST NEW MARKET BRD OF TWN COM MD0002330 | EAST NEW MARKET | 400 | — | — | Compliant |
| BEACHES WATER CO MD0040029 | ST LEONARDS | 400 | — | — | Compliant |
| NAVAL SURFACE WARFARE CENTER MD0020048 | ANNAPOLIS | 400 | — | — | Compliant |
| BAY MANOR NURSING HOME MD0020202 | ANNAPOLIS | 400 | — | — | Compliant |
| GALENA COMMISSIONERS MD0002424 | GALENA | 400 | — | — | Compliant |
| BENJAMINS VILLAGE/HOMESTEAD M.H.P. MD0070209 | PORT DEPOSIT | 400 | — | — | Compliant |
| CHERRY HILL WATER SYSTEM MD0070014 | ELKTON | 400 | — | — | Compliant |
| STRAWBERRY HLS-POTOMAC UTIL CO MD0002748 | SILVER SPRG | 396 | — | — | Compliant |
| STONEY CHASE/ ROCK CREEK M.H.P.S MD0070233 | ELKTON | 396 | — | — | Compliant |
| STEEPLECHASE WATERWORKS MD0220010 | SALISBURY | 395 | — | — | Compliant |
| SWAN HARBOR DELL MD0002473 | HAVRE DE GRACE | 390 | — | — | Compliant |
| BONNIE BROOK MD0090001 | CAMBRIDGE | 390 | — | — | Compliant |
| LAKE HAVEN TRAILER PARK MD0002228 | BERLIN | 384 | — | — | Compliant |
| CAVALIER COUNTRY MD0040002 | PRINCE FREDERICK | 381 | — | — | Compliant |
| SANITARY ASSOCIATES WV3301967 | BALTIMORE | 380 | — | — | Compliant |
| BENEDICT MD0080062 | LA PLATA | 376 | — | — | Compliant |
| ILUR WOODS EDGE MHP LLC IL0195360 | CROFTON | 373 | — | — | Compliant |
| KINGS MANOR - WHITE PLAINS WATER CO, INC MD0080024 | WALDORF | 372 | — | — | Compliant |
| KINGS MAN S-WHITE PLNS WTR CO MD0002826 | WHITE PLAINS | 372 | — | — | Compliant |
| CEDARHURST WATER CO INC MD0002544 | LINTHICUM HGHTS | 372 | — | — | Compliant |
| TOWN OF KITZMILLER MD0110013 | MOUNTAIN LAKE PARK | 370 | — | — | Compliant |
| MONTROSE SCHOOL FOR GIRLS MD0002702 | REISTERSTOWN | 370 | — | — | Compliant |
| SHORES OF CALVERT MD0040015 | PRINCE FREDERICK | 361 | — | — | Compliant |
| CRYSTAL BEACH MANOR INC MD0002329 | EARLEVILLE | 360 | — | — | Compliant |
| PINE CREST ESTATES MOBILE HOME PA4560039 | FROSTBURG | 354 | — | — | Compliant |
| BAY COUNTRY ESTATES INC MD0002346 | ELKTON | 351 | — | — | Compliant |
| SUMMERHILL MOBILE HOME PARK MD0020221 | GLEN ARM | 350 | — | — | Compliant |
| CENTENNIAL HILL WATER ASSOC MD0002413 | FROSTBURG | 350 | — | — | Compliant |
| BLOOMINGTON MD0110002 | OAKLAND | 350 | — | — | Compliant |
| CALVEAT MANOR CORPORATION MD0002188 | ACCOKEEK | 350 | — | — | Compliant |
| MYERSVILLE BURGESS AND COUNCIL MD0002590 | MYERSVILLE | 350 | — | — | Compliant |
| POTOMAC UTIL POTO VISTA MD0002903 | SILVER SPRING | 350 | — | — | Compliant |
| CALVERT MANOR CORPORATION MD0000719 | ACCOKEEK | 350 | — | — | Compliant |
| ST. LEONARD MD0040013 | PRINCE FREDERICK | 350 | — | — | Compliant |
| CENTENNIAL HILL WATER ASSOC MD0010039 | FROSTBURG | 350 | — | — | Compliant |
| CALVERT BEACH - DECATUR STREET MD0040024 | WALDORF | 350 | — | — | Compliant |
| ST JAMES SCHOOL MD0002457 | HAGERSTOWN | 350 | — | — | Compliant |
| POMUNK WATER COMPANY DISTRIBUTION SYSTEM MD0080084 | WALDORF | 340 | — | — | Compliant |
| COPPERFIELD MD0100037 | FREDERICK | 338 | — | — | Compliant |
| KENWOOD BEACH MD0040007 | PRINCE FREDERICK | 338 | — | — | Compliant |
| CHELTENHAM BOYS VILLAGE MD0160003 | MILLERSVILLE | 330 | — | — | Compliant |
| ESPERANZA MD0180033 | LEXINGTON PARK | 325 | — | — | Compliant |
| EAST SUNRISE DRIVE MD0180032 | LEXINGTON PARK | 325 | — | — | Compliant |
| ROLLING ROAD MD0180031 | LEXINGTON PARK | 325 | — | — | Compliant |
| MERFIELD LANE MD0180029 | LEXINGTON PARK | 325 | — | — | Compliant |
| MOUNT SAVAGE WATER COMPANY - SEE 0010009 MD0010024 | MT. SAVAGE | 325 | — | — | Compliant |
| ST MARY'S METRO COMMISSION MD0180030 | LEXINGTON PARK | 325 | — | — | Compliant |
| NEWARK MD0230002 | BERLIN | 325 | — | — | Compliant |
| WOODLAND VLG-VA DEVELOPMENT CO MD0002521 | LA PLATA | 320 | — | — | Compliant |
| IDLEWOOD PARK MD0080205 | CROFTON | 320 | — | — | Compliant |
| KENWOOD BEACH WATER SYSTEM MD0002719 | ST LEONARD | 320 | — | — | Compliant |
| JOHN WALSTON MOBILE HOME PARK MD0002727 | SALISBURY | 315 | — | — | Compliant |
| LUTHERAN VILLAGE AT MILLER'S GRANT MD0130007 | ELLICOTT CITY | 315 | — | — | Compliant |
| BROAD CREEK-ANNE ARUNDEL CO MD0002432 | GLEN BURNIE | 312 | — | — | Compliant |
| BEL ALTON MD0080005 | LA PLATA | 311 | — | — | Compliant |