States / Connecticut / Drinking Water
Drinking Water Systems in Connecticut
474 community water systems serving about 2,726,655 people. 208 have a health-based violation on record since 2015, 120 of them unresolved.
SystemHealth-based violations (2015+)
FREEDOM VILLAGE ELDERLY HOUSING · MONTVILLE · 43 served · groundwater9 (7 unresolved)
31 GRIST MILL RD · EAST HADDAM · 30 served · groundwater28 (4 unresolved)
BROOKFIELD HILLS CONDOMINIUM UNIT OWNERS · BROOKFIELD · 144 served · groundwater15 (3 unresolved)
GOODSPEED ACTOR HOUSING - THE VILLAGE · EAST HADDAM · 40 served · groundwater15 (3 unresolved)
NORTHSTONE GARDENS · NORTH STONINGTON · 79 served · groundwater24 (2 unresolved)
BROOKFIELD HOUSING AUTHORITY · BROOKFIELD · 37 served · groundwater6 (2 unresolved)
COUNTRY MANOR · POMFRET · 66 served · groundwater39 (1 unresolved)
FAWN RIDGE ASSOCIATION INC. · WOODSTOCK · 36 served · groundwater36 (1 unresolved)
JUNIPER CLUB INC. · BLOOMFIELD · 104 served · groundwater25 (1 unresolved)
MOUNTVIEW APARTMENTS · MONTVILLE · 105 served · groundwater24 (1 unresolved)
PINECREST CONDOMINIUMS · WOODSTOCK · 110 served · groundwater23 (1 unresolved)
QUINEBAUG MOBILE HOME PARK · THOMPSON · 205 served · groundwater21 (1 unresolved)
SUNNY VALLEY TAX DISTRICT · NEW MILFORD · 500 served · groundwater17 (1 unresolved)
MARIANAPOLIS PREP SCHOOL - ST ALBERTS · THOMPSON · 51 served · groundwater17 (1 unresolved)
BROOKWOOD APARTMENTS · WOODSTOCK · 44 served · groundwater17 (1 unresolved)
RIDGEVIEW HEIGHTS · WILLINGTON · 96 served · groundwater15 (1 unresolved)
ORCHARD ACRES ASSOCIATION · MANSFIELD · 176 served · groundwater14 (1 unresolved)
RENWOOD APARTMENTS · MANSFIELD · 190 served · groundwater13 (1 unresolved)
TWIN HILLS WATER DISTRICT · COVENTRY · 156 served · groundwater13 (1 unresolved)
EAST WINDSOR HOUSING AUTHORITY · EAST WINDSOR · 94 served · groundwater13 (1 unresolved)
LITTLE BROOK RD PROPERTY OWNERS ASSN · NEW HARTFORD · 64 served · groundwater13 (1 unresolved)
LYME ACADEMY APARTMENTS,LLC · OLD LYME · 48 served · groundwater13 (1 unresolved)
JUMBO APARTMENTS · PLAINFIELD · 35 served · groundwater13 (1 unresolved)
MAPLEWOOD-MILLBROOK APARTMENTS · MANSFIELD · 153 served · groundwater10 (1 unresolved)
KNOLLCREST TAX DISTRICT · NEW FAIRFIELD · 356 served · groundwater9 (1 unresolved)
KNOLLWOOD APARTMENTS · MANSFIELD · 312 served · groundwater9 (1 unresolved)
CAMPBELL HEIGHTS APARTMENTS · CANTERBURY · 152 served · groundwater9 (1 unresolved)
CTWC - FOREST HOMES DIVISION · MARLBOROUGH · 100 served · groundwater9 (1 unresolved)
ROSELAND TERRACE ASSOCIATION, INC. · WOODSTOCK · 100 served · groundwater9 (1 unresolved)
CORNWALL WATER COMPANY · CORNWALL · 48 served · groundwater9 (1 unresolved)
SUNSET APARTMENTS LLC · BOLTON · 46 served · groundwater9 (1 unresolved)
FOX LAUREL MOBILE HOME PARK, LLC · MONTVILLE · 40 served · groundwater9 (1 unresolved)
YESHIVA OF WATERBURY-DURHAM CAMPUS · DURHAM · 490 served · groundwater5 (1 unresolved)
BLUE TRAILS WATER ASSOCIATION · DURHAM · 224 served · groundwater5 (1 unresolved)
COLCHESTER COMMONS · COLCHESTER · 224 served · groundwater5 (1 unresolved)
WHITE OAK CONDOMINIUMS · MANSFIELD · 192 served · groundwater5 (1 unresolved)
PERRY HILL ESTATES APARTMENTS INC. · ASHFORD · 144 served · groundwater5 (1 unresolved)
ASHFORD HILLS APARTMENTS · ASHFORD · 136 served · groundwater5 (1 unresolved)
WILLINGTON RIDGE CONDOS - SYSTEM #1 · WILLINGTON · 102 served · groundwater5 (1 unresolved)
ABBY WATER LLC · HEBRON · 100 served · groundwater5 (1 unresolved)
WOODLAWN APARTMENTS · ASHFORD · 96 served · groundwater5 (1 unresolved)
THOMPSON HILL WATER CO - PAULA LANE DIV · THOMPSON · 85 served · groundwater5 (1 unresolved)
EVANGELICAL CHRISTIAN CENTER - MAIN · ASHFORD · 84 served · groundwater5 (1 unresolved)
AARON MANOR NURSING & REHAB CENTER · CHESTER · 81 served · groundwater5 (1 unresolved)
THOMPSON HILL WATER CO - BEECHWOOD ACRES · MONTVILLE · 77 served · groundwater5 (1 unresolved)
LAKESIDE MANOR APARTMENTS · MONTVILLE · 72 served · groundwater5 (1 unresolved)
CHAPLIN WOODS CONDOMINIUMS · CHAPLIN · 69 served · groundwater5 (1 unresolved)
MAR-LEA PARK APARTMENTS · ASHFORD · 50 served · groundwater5 (1 unresolved)
SEELY - BROWN VILLAGE · POMFRET · 48 served · groundwater5 (1 unresolved)
HEBRON ARMS APARTMENTS · HEBRON · 39 served · groundwater5 (1 unresolved)
BROOKLYN MANOR · BROOKLYN · 30 served · groundwater5 (1 unresolved)
BOXWOOD CONDOMINIUM ASSOCIATION · OLD LYME · 28 served · groundwater5 (1 unresolved)
MOOSUP MANOR · PLAINFIELD · 27 served · groundwater5 (1 unresolved)
NORTH WILLINGTON VILLAGE CONDO ASSOC. · WILLINGTON · 66 served · groundwater4 (1 unresolved)
NORTHFORD GLEN CONDOMINIUM ASSOCIATION · NORTH BRANFORD · 84 served · groundwater2 (1 unresolved)
BERLIN WATER CONTROL COMMISSION · BERLIN · 5,128 served · purchased surface water1 (1 unresolved)
FAIRFIELD HILLS · NEWTOWN · 2,610 served · groundwater1 (1 unresolved)
SCWA, OAKDALE HEIGHTS DIVISION · MONTVILLE · 876 served · groundwater1 (1 unresolved)
SHARON WATER & SEWER COMMISSION · SHARON · 803 served · surface water1 (1 unresolved)
WOODSTOCK ACADEMY SOUTH CAMPUS · WOODSTOCK · 620 served · groundwater1 (1 unresolved)
STONE BRIDGE CENTER FOR HEALTH & REHAB · NEWTOWN · 504 served · groundwater1 (1 unresolved)
WOODHAVEN APARTMENTS · WILLINGTON · 489 served · groundwater1 (1 unresolved)
POMFRET SCHOOL · POMFRET · 400 served · groundwater1 (1 unresolved)
TURKEY HILL OF EAST GRANBY, LLC · EAST GRANBY · 360 served · groundwater1 (1 unresolved)
ETHEL WALKER SCHOOL · SIMSBURY · 325 served · groundwater1 (1 unresolved)
THE RECTORY SCHOOL · POMFRET · 300 served · groundwater1 (1 unresolved)
CHADWICK HOMEOWNERS ASSN., INC. · OLD LYME · 292 served · groundwater1 (1 unresolved)
WALDEN APARTMENTS · WILLINGTON · 276 served · groundwater1 (1 unresolved)
COLCHESTER ESTATES · COLCHESTER · 276 served · groundwater1 (1 unresolved)
WOODBURY KNOLL, LLC. · WOODBURY · 258 served · groundwater1 (1 unresolved)
MATULAITIS NURSING HOME · PUTNAM · 254 served · groundwater1 (1 unresolved)
JOHNSON MEMORIAL HOSPITAL, INC · STAFFORD · 250 served · groundwater1 (1 unresolved)
APPLE REHAB · ROCKY HILL · 238 served · purchased surface water1 (1 unresolved)
SOUTH KENT SCHOOL · KENT · 228 served · groundwater1 (1 unresolved)
IVY WOODS · TOLLAND · 207 served · groundwater1 (1 unresolved)
WOODSTOCK MEADOWS CONDOMINIUM ASSN. · WOODSTOCK · 180 served · groundwater1 (1 unresolved)
CAREFREE HOMEOWNERS ASSOCIATION · LEBANON · 172 served · groundwater1 (1 unresolved)
MARLBOROUGH HEALTH CARE CENTER, INC · MARLBOROUGH · 165 served · groundwater1 (1 unresolved)
BIRCH HILLS CONDOMINIUMS · ASHFORD · 132 served · groundwater1 (1 unresolved)
MARIANAPOLIS PREP SCHOOL - ST JOHNS · THOMPSON · 128 served · groundwater1 (1 unresolved)
CHELSEA COMMON CONDOMINIUM ASSOCIATION · EAST GRANBY · 126 served · groundwater1 (1 unresolved)
HERITAGE HILL CONDOMINIUM ASSN, INC · WOODBURY · 120 served · groundwater1 (1 unresolved)
HUNTING LODGE APARTMENTS · MANSFIELD · 115 served · groundwater1 (1 unresolved)
CLUB HOUSE APARTMENTS · MANSFIELD · 115 served · groundwater1 (1 unresolved)
CORNELL HILLS ASSOC, INC · DANBURY · 108 served · purchased surface water1 (1 unresolved)
WILLINGTON RIDGE CONDOS - SYSTEM #2 · WILLINGTON · 102 served · groundwater1 (1 unresolved)
FALL BROOK MOBILE HOME PARK · KILLINGLY · 98 served · groundwater1 (1 unresolved)
GRANT HILL ASSOCIATES, INC. · BLOOMFIELD · 97 served · groundwater1 (1 unresolved)
SOLANO INN LLC · PORTLAND · 96 served · groundwater1 (1 unresolved)
WOODS EDGE APARTMENTS · MANSFIELD · 96 served · groundwater1 (1 unresolved)
HILLSIDE CONDOMINIUMS · COLUMBIA · 96 served · groundwater1 (1 unresolved)
DEER RUN SUPPLY · MONTVILLE · 84 served · groundwater1 (1 unresolved)
ARROW POINT WATER CO · WARREN · 84 served · groundwater1 (1 unresolved)
CRESTVIEW CONDOMINIUM ASSOCIATION · CHESHIRE · 84 served · groundwater1 (1 unresolved)
LINCOLN PARK ELDERLY HOUSING · PRESTON · 80 served · groundwater1 (1 unresolved)
SCHOOL HILL ASSOCIATION, INC. · EAST WINDSOR · 77 served · groundwater1 (1 unresolved)
ROUND HILL LLC - WELL# 1&2 · LISBON · 72 served · groundwater1 (1 unresolved)
ESSEX GARDENS · ESSEX · 72 served · groundwater1 (1 unresolved)
LONGVIEW ESTATES, LLC · CANTERBURY · 69 served · groundwater1 (1 unresolved)
MIDDLEFIELD HOUSING AUTHORITY · MIDDLEFIELD · 62 served · groundwater1 (1 unresolved)
MILE CREEK APARTMENTS · OLD LYME · 60 served · groundwater1 (1 unresolved)
NEIGHBORS OF ROGERS, LLC · GROTON · 57 served · groundwater1 (1 unresolved)
INDEPENDENCE VILLAGE ELDERLY HOUSING · MONTVILLE · 55 served · groundwater1 (1 unresolved)
CHATHAM ACRES ELDERLY HOUSING · EAST HAMPTON · 50 served · groundwater1 (1 unresolved)
SOUTHRIDGE PARK APARTMENTS · BOLTON · 50 served · groundwater1 (1 unresolved)
LYMEWOOD ELDERLY HOUSING · OLD LYME · 50 served · groundwater1 (1 unresolved)
DURHAM ELDERLY HOUSING DIVISION · DURHAM · 50 served · groundwater1 (1 unresolved)
COOK DRIVE ASSOCIATION · BOLTON · 49 served · groundwater1 (1 unresolved)
KNOLLBROOK VILLAGE ELDERLY HOUSING · CANTERBURY · 48 served · groundwater1 (1 unresolved)
WHISPERING HILLS, LLC - WELL D SYSTEM · ANDOVER · 48 served · groundwater1 (1 unresolved)
GORMAN ROAD APARTMENTS · BROOKLYN · 48 served · groundwater1 (1 unresolved)
MOOSUP POND TERRACE, LLC · PLAINFIELD · 46 served · groundwater1 (1 unresolved)
LAUREL HEIGHTS ASSOCIATION, INC. · OLD LYME · 45 served · groundwater1 (1 unresolved)
ELDRIDGE ELDERLY HOUSING · MORRIS · 40 served · groundwater1 (1 unresolved)
RIDGEWOOD HILLS ASSOCIATION SYSTEM 1 · DEEP RIVER · 36 served · groundwater1 (1 unresolved)
VILLAGE HILL APARTMENTS · LEBANON · 36 served · groundwater1 (1 unresolved)
BROOKSCROSSING APARTMENTS · POMFRET · 36 served · groundwater1 (1 unresolved)
OLD INDIAN TRAIL · DURHAM · 32 served · groundwater1 (1 unresolved)
BELLWOOD COURT · EAST HAMPTON · 31 served · groundwater1 (1 unresolved)
WOODSTOCK HOUSING AUTHORITY · WOODSTOCK · 26 served · groundwater1 (1 unresolved)
NORWICH PUBLIC UTILITIES · FRANKLIN · 36,163 served · surface water49
39 HOP BROOK RD - APT COMPLEX · BROOKFIELD · 36 served · groundwater34
ARROWHEAD BY THE LAKE ASSOCIATION, INC. · WOLCOTT · 288 served · groundwater29
LAKE LILLINONAH SHORES CONDOS · BROOKFIELD · 130 served · groundwater27
BETHEL WATER DEPT · BETHEL · 9,507 served · surface water25
CONRADS PARK · KILLINGLY · 60 served · groundwater25
HUBBARD HILL APARTMENTS · KILLINGLY · 36 served · groundwater24
CTWC - REDWOOD FARMS DIVISION · MANCHESTER · 424 served · groundwater16
WOODLAND SUMMIT COMMUNITY WATER ASSN · TOLLAND · 216 served · groundwater16
BERNHARDT MEADOW · ROXBURY · 36 served · groundwater16
MONTVILLE WATER SUPPLY · MONTVILLE · 1,300 served · purchased surface water15
ELMWOOD COURT, LLC · BETHEL · 54 served · groundwater15
WOODCREEK VILLAGE CONDOMINIUM ASSN, INC · BROOKFIELD · 72 served · groundwater14
AQUARION-FALLS VILLAGE · CANAAN · 488 served · groundwater13
DEER PARK APARTMENTS · WILLINGTON · 125 served · groundwater13
55 SUGAR STREET · NEWTOWN · 158 served · groundwater12
CEDAR TERRACE PROP OWNERS ASSN · DANBURY · 66 served · groundwater12
SAFE HARBOR, INC. · WESTBROOK · 50 served · groundwater12
VOLUNTOWN HOUSING AUTHORITY · VOLUNTOWN · 42 served · groundwater12
OAKDALE MANOR WATER ASSOCIATION · SOUTHBURY · 40 served · groundwater11
ORCHARD HILL ASSOCIATION · BLOOMFIELD · 30 served · groundwater11
LEDYARD WPCA - LEDYARD CENTER · LEDYARD · 3,294 served · purchased surface water10
STONY HILL VILLAGE CONDOMINIUM ASSN · BROOKFIELD · 392 served · groundwater10
WOODHALL SCHOOL, INC · BETHLEHEM · 68 served · groundwater10
890 BOSTON TURNPIKE · BOLTON · 60 served · groundwater10
TOLLAND WATER DEPT - TORRY ROAD · TOLLAND · 204 served · purchased surface water9
CTWC - LEBANON ELDERLY DIV. · LEBANON · 67 served · groundwater9
298-302 ALBANY TURNPIKE · CANTON · 28 served · groundwater9
VILLAGE MARKET PLACE · GOSHEN · 462 served · groundwater8
CANDLEWOOD TRAILS ASSOCIATION, INC. · NEW MILFORD · 312 served · groundwater8
BIRCH GROVES ASSOCIATION, INC · NEW MILFORD · 300 served · groundwater8
CARRIAGE HOUSE APARTMENTS · MANSFIELD · 196 served · groundwater8
LILLINONAH PARK ESTATES HOMEOWNERS ASSN · BROOKFIELD · 128 served · groundwater8
CRANBERRY BOG APARTMENTS · KILLINGLY · 72 served · groundwater8
MARINA COVE · MONTVILLE · 70 served · groundwater8
NATURAL PARK APARTMENTS · WILLINGTON · 60 served · groundwater8
HOP RIVER HOMES · ANDOVER · 26 served · groundwater7
CTWC - UNIONVILLE SYSTEM · AVON · 14,693 served · purchased surface water5
AQUARION-PEARCE MANOR · DANBURY · 133 served · purchased surface water5
LAKE HILLS VILLAGE CONDOMINIUMS · WOLCOTT · 102 served · groundwater5
WESTON WATER SUPPLY · WESTON · 100 served · groundwater5
OAKRIDGE GARDENS, LLC · MONTVILLE · 70 served · groundwater5
SALEM MANOR CONDOMINIUMS, SYSTEM #1 · SALEM · 32 served · groundwater5
DANBURY WATER DEPARTMENT · BETHEL · 62,055 served · surface water4
JEWETT CITY WATER COMPANY · GRISWOLD · 6,840 served · surface water4
SCWA, TOWER-FERRY VIEW DIVISION · LEDYARD · 2,567 served · groundwater4
CONNECTICUT CORRECTIONAL INSTITUTE · ENFIELD · 2,385 served · groundwater4
SCWA, NORTH STONINGTON DIVISION (NST) · NORTH STONINGTON · 1,860 served · groundwater4
TARIFFVILLE FIRE DISTRICT WATER DEPT · SIMSBURY · 1,477 served · groundwater4
TOLLAND WATER DEPARTMENT · TOLLAND · 1,251 served · groundwater4
CTWC - JENSENS BEECHWOOD SYSTEM · KILLINGWORTH · 750 served · groundwater4
VERNON VILLAGE INC. · SOUTH WINDSOR · 430 served · groundwater4
SCWA, CEDAR RIDGE DIVISION · NORTH STONINGTON · 370 served · groundwater4
EAST HAMPTON WPCA - ROYAL OAKS SYSTEM · EAST HAMPTON · 328 served · groundwater4
CTWC - GENERAL WATER DIVISION · COVENTRY · 306 served · groundwater4
AQUARION-FOREST HILLS · NEW MILFORD · 265 served · groundwater4
CANDLE HILL MOBILE HOME PARK · NEW MILFORD · 233 served · groundwater4
WESTCHESTER HILLS CONDOMINIUM ASSN. · COLCHESTER · 225 served · groundwater4
CTWC - SHORELINE REG-CHESTER VLLG WEST · CHESTER · 216 served · groundwater4
HAWTHORNE TERRACE ASSOC · DANBURY · 156 served · groundwater4
DOUGLAS MANOR · WINDHAM · 135 served · groundwater4
AQUARION-SCODON · RIDGEFIELD · 130 served · groundwater4
CHESTELM HEALTH & REHABILITATION CENTER · EAST HADDAM · 120 served · groundwater4
WELLSWOOD ESTATES FOUNDATION, INC. · HEBRON · 112 served · groundwater4
GRISWOLD MHP LLC · GRISWOLD · 99 served · groundwater4
ASHLAND POND MOBILE HOME PARK · GRISWOLD · 74 served · groundwater4
CTWC - WELLSWOOD VILLAGE DIV · HEBRON · 60 served · groundwater4
WESTVIEW TERRACE MOBILE HOME PARK · PLAINFIELD · 60 served · groundwater4
COUNTRY ACRES PARK · KILLINGLY · 48 served · groundwater4
BITTERSWEET RIDGE WATER ASSOCIATION · MIDDLEFIELD · 40 served · groundwater4
MERIDEN WATER DIVISION · BERLIN · 58,441 served · surface water3
SOUTH NORWALK ELECTRIC & WATER · DARIEN · 42,000 served · surface water3
AQUARION-PLAINVILLE REGIONAL · BRISTOL · 18,231 served · groundwater3
COUNTRYSIDE APARTMENTS · WOLCOTT · 218 served · groundwater3
CTWC - CRYSTAL SPRINGS DIV. · MANSFIELD · 169 served · groundwater3
COBALT LODGE HEALTHCARE & REHAB CENTER · EAST HAMPTON · 130 served · groundwater2
BROOKVIEW WATER COMPANY · RIDGEFIELD · 55 served · groundwater2
TORRINGTON WATER COMPANY · HARWINTON · 37,915 served · surface water1
PRESTON PLAINS WATER COMPANY · PRESTON · 550 served · groundwater1
GQC WELL COMMISSION · EAST GRANBY · 360 served · groundwater1
ST. THOMAS MORE SCHOOL-MAIN SYSTEM · MONTVILLE · 270 served · groundwater1
OLD NEWGATE RIDGE WATER COMPANY INC · EAST GRANBY · 208 served · groundwater1
MALLARD COVE CONDOMINIUM ASSN. · EAST HAMPTON · 177 served · groundwater1
AQUARION-LEBANON · LEBANON · 149 served · groundwater1
TWIN MAPLES NURSING HOME · DURHAM · 100 served · groundwater1
MANSFIELD VILLAGE, LLC · MANSFIELD · 40 served · groundwater1
FOXRIDGE APARTMENTS-WELL 2 · BARKHAMSTED · 25 served · groundwater1
SALEM MANOR CONDOMINIUMS, SYSTEM #2 · SALEM · 25 served · groundwater1
REGIONAL WATER AUTHORITY · ANSONIA · 418,900 served · surface waternone on record
METROPOLITAN DISTRICT COMMISSION · SOUTH WINDSOR · 390,887 served · surface waternone on record
AQUARION-EASTERN FAIRFIELD COUNTY · BEACON FALLS · 351,756 served · surface waternone on record
AQUARION-STAMFORD · DARIEN · 119,214 served · surface waternone on record
WATERBURY WATER DEPARTMENT · MIDDLEBURY · 107,271 served · surface waternone on record
CTWC - NORTHERN REG-WESTERN SYSTEM · EAST GRANBY · 101,313 served · surface waternone on record
NEW BRITAIN WATER DEPARTMENT · BERLIN · 73,534 served · surface waternone on record
AQUARION-GREENWICH · GREENWICH · 53,297 served · surface waternone on record
BRISTOL WATER DEPARTMENT · BRISTOL · 52,079 served · surface waternone on record
MANCHESTER WATER DEPARTMENT · GLASTONBURY · 51,198 served · surface waternone on record
SOUTHINGTON WATER DEPARTMENT · CHESHIRE · 43,069 served · surface waternone on record
MIDDLETOWN WATER DEPARTMENT · CROMWELL · 41,019 served · surface waternone on record
NORWALK FIRST TAXING DISTRICT · NEW CANAAN · 40,256 served · surface waternone on record
WALLINGFORD WATER DEPARTMENT · NORTH HAVEN · 37,267 served · surface waternone on record
CTWC - SHORELINE REGION-GUILFORD SYSTEM · CLINTON · 33,975 served · surface waternone on record
GROTON UTILITIES · GROTON · 30,200 served · surface waternone on record
NEW LONDON DEPT. OF PUBLIC UTILITIES · NEW LONDON · 27,620 served · surface waternone on record
UNIVERSITY OF CONNECTICUT - MAIN CAMPUS · MANSFIELD · 27,199 served · purchased surface waternone on record
CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · BEACON FALLS · 22,735 served · surface waternone on record
WINDHAM WATER WORKS · MANSFIELD · 21,214 served · surface waternone on record
AQUARION-DARIEN · DARIEN · 18,737 served · purchased surface waternone on record
HAZARDVILLE WATER COMPANY · EAST WINDSOR · 18,544 served · groundwaternone on record
WATERFORD WPCA · MONTVILLE · 16,578 served · purchased surface waternone on record
EAST LYME WATER & SEWER COMMISSION · EAST LYME · 15,245 served · purchased surface waternone on record
AQUARION-SIMSBURY REGIONAL · EAST GRANBY · 14,691 served · groundwaternone on record
CROMWELL FIRE DISTRICT WATER DEPARTMENT · BERLIN · 14,316 served · groundwaternone on record
AQUARION-NEW MILFORD REGIONAL · BROOKFIELD · 13,331 served · groundwaternone on record
AQUARION-VALLEY · ANSONIA · 13,080 served · purchased surface waternone on record
AVON WATER CO · AVON · 11,590 served · groundwaternone on record
AQUARION-MYSTIC · GROTON · 10,788 served · surface waternone on record
AQUARION-NEW CANAAN · NEW CANAAN · 10,097 served · purchased surface waternone on record
WATERTOWN WATER & SEWER AUTHORITY · MIDDLEBURY · 9,972 served · purchased surface waternone on record
WINSTED WATER WORKS · BARKHAMSTED · 7,784 served · surface waternone on record
KENSINGTON FIRE DISTRICT · BERLIN · 7,553 served · purchased surface waternone on record
AQUARION-RIDGEFIELD · RIDGEFIELD · 7,476 served · purchased surface waternone on record
HERITAGE WATER COMPANY · MIDDLEBURY · 7,300 served · purchased surface waternone on record
PUTNAM WATER POLLUTION CONTROL AUTHORITY · PUTNAM · 7,300 served · surface waternone on record
WATERTOWN FIRE DISTRICT · WATERTOWN · 6,718 served · groundwaternone on record
CTWC - CRYSTAL SYSTEM · BROOKLYN · 6,378 served · groundwaternone on record
CTWC - NAUGATUCK REG-COLLINSVILLE SYS · AVON · 6,324 served · surface waternone on record
AQUARION-NEWTOWN REGIONAL · NEWTOWN · 6,054 served · groundwaternone on record
CTWC - NAUGATUCK REG-TERRYVILLE SYSTEM · PLYMOUTH · 5,607 served · groundwaternone on record
CTWC - SHORELINE REGION-CHESTER SYSTEM · CHESTER · 5,030 served · surface waternone on record
PORTLAND WATER DEPARTMENT · MIDDLETOWN · 5,010 served · purchased surface waternone on record
COLCHESTER SEWER & WATER COMMISSION · COLCHESTER · 4,020 served · groundwaternone on record
CTWC - NAUGATUCK REG-THOMASTON SYSTEM · PLYMOUTH · 3,789 served · groundwaternone on record
CTWC - SHORELINE REGION-SOUND VIEW · OLD LYME · 3,397 served · groundwaternone on record
AQUARION-LITCHFIELD REGIONAL · GOSHEN · 3,097 served · purchased surface waternone on record
CONNECTICUT VALLEY HOSPITAL · MIDDLETOWN · 2,928 served · surface waternone on record
WORTHINGTON FIRE DISTRICT · BERLIN · 2,875 served · purchased surface waternone on record
SCWA, MONTVILLE DIVISION (MTV) · MONTVILLE · 2,570 served · groundwaternone on record
WOLCOTT WATER DEPARTMENT · WATERBURY · 2,550 served · purchased surface waternone on record
CTWC - GALLUP SYSTEM · PLAINFIELD · 2,538 served · groundwaternone on record
GROTON LONG POINT ASSOCIATION · GROTON · 2,400 served · purchased surface waternone on record
LEDYARD WPCA, GALES FERRY SYSTEM · GROTON · 2,369 served · purchased surface waternone on record
SALMON BROOK DISTRICT WATER DEPT · GRANBY · 2,151 served · groundwaternone on record
NOANK FIRE DISTRICT · GROTON · 1,947 served · purchased surface waternone on record
AQUARION-SALISBURY · SALISBURY · 1,932 served · surface waternone on record
CTWC - HEBRON CENTER DIVISION · HEBRON · 1,927 served · groundwaternone on record
AQUARION-NEW HARTFORD · NEW HARTFORD · 1,872 served · groundwaternone on record
CTWC - PLAINFIELD SYSTEM · BROOKLYN · 1,713 served · groundwaternone on record
DURHAM CENTER DIVISION · DURHAM · 1,601 served · purchased surface waternone on record
AQUARION-NORTH CANAAN · NORTH CANAAN · 1,481 served · groundwaternone on record
SCWA, MOHEGAN DIVISION · MONTVILLE · 1,428 served · groundwaternone on record
CTWC - LEGEND HILL SYSTEM · MADISON · 1,368 served · groundwaternone on record
AQUARION-MARLBOROUGH · MARLBOROUGH · 1,348 served · groundwaternone on record
CANDLEWOOD SHORES TAX DISTRICT · BROOKFIELD · 1,315 served · groundwaternone on record
AQUARION-WOODBURY · WOODBURY · 1,209 served · groundwaternone on record
AQUARION-EAST DERBY · DERBY · 1,101 served · purchased surface waternone on record
CTWC - THOMPSON SYSTEM · THOMPSON · 1,070 served · groundwaternone on record
CTWC - SHORELINE REGION-POINT O WOODS · OLD LYME · 1,068 served · groundwaternone on record
SPRAGUE WATER & SEWER AUTHORITY · SPRAGUE · 1,058 served · groundwaternone on record
AQUARION-RIDGEFIELD KNOLLS · RIDGEFIELD · 958 served · groundwaternone on record
AQUARION-NORFOLK · NORFOLK · 913 served · surface waternone on record
WOODLAKE TAX DISTRICT · WOODBURY · 912 served · groundwaternone on record
CTWC - AMSTON LAKE DIVISION · COLCHESTER · 910 served · groundwaternone on record
AQUARION-KENT · KENT · 817 served · groundwaternone on record
SOUTHBURY TRAINING SCHOOL · SOUTHBURY · 816 served · groundwaternone on record
CTWC - UCONN SOUTH EAGLEVILLE DIV. · MANSFIELD · 750 served · purchased surface waternone on record
CLC OWNERS CORPORATION · BROOKFIELD · 736 served · groundwaternone on record
KENT SCHOOL CORP (VALLEY CAMPUS) · KENT · 722 served · groundwaternone on record
CTWC - SPICE HILL DIVISION · EAST HAMPTON · 712 served · groundwaternone on record
LAKE WAUBEEKA ASSOCIATION · DANBURY · 712 served · groundwater under surface influencenone on record
CTWC - COVENTRY HILLS DIV · COVENTRY · 700 served · groundwaternone on record
SCWA, LEDYARD CENTER DIVISION · LEDYARD · 652 served · groundwaternone on record
AQUARION-BALL POND · NEW FAIRFIELD · 629 served · groundwaternone on record
WATERTOWN WATER & SEWER - WESTGATE · WATERTOWN · 600 served · purchased groundwaternone on record
AQUARION-SUFFIELD · SUFFIELD · 595 served · groundwaternone on record
BRUNSWICK SCHOOL (LOWER & LOWER MIDDLE) · GREENWICH · 567 served · groundwaternone on record
QUONNIPAUG HILLS - MAIN SYSTEM · GUILFORD · 564 served · groundwaternone on record
EDGEMERE CONDOMINIUM ASSN., INC. · EAST HAMPTON · 540 served · groundwaternone on record
SCWA, CHESTERFIELD DIVISION · MONTVILLE · 524 served · groundwaternone on record
CANDLEWOOD KNOLLS WATER AUTHORITY · NEW FAIRFIELD · 524 served · groundwaternone on record
SALISBURY SCHOOL · SALISBURY · 520 served · groundwaternone on record
CTWC - SOUTH COVENTRY SYSTEM · COVENTRY · 501 served · groundwaternone on record
KITEMAUG ORCHARD ASSOCIATION, INC. · MONTVILLE · 490 served · groundwaternone on record
CTWC - NORTHERN REGION-LAKEVIEW TERRACE · COVENTRY · 472 served · groundwaternone on record
HARMONY ACRES MOBILE HOME PARK · PROSPECT · 465 served · groundwaternone on record
AQUARION-LAKESIDE · SOUTHBURY · 455 served · groundwaternone on record
SCWA, HILLCREST DIVISION (HLC) · MONTVILLE · 450 served · purchased surface waternone on record
AQUARION-OXFORD TOWNE CENTER · OXFORD · 449 served · purchased groundwaternone on record
CTWC - SHORELINE REGION-MASONS ISLAND · STONINGTON · 445 served · purchased surface waternone on record
CTWC - BAY MOUNTAIN · GRISWOLD · 440 served · groundwaternone on record
STAFFORD HOLLOW WATER ASSOCIATION · STAFFORD · 429 served · groundwaternone on record
AQUARION-NEW FAIRFIELD · NEW FAIRFIELD · 406 served · groundwaternone on record
RUMSEY HALL SCHOOL · WASHINGTON · 398 served · groundwaternone on record
AQUARION-MEADOWBROOK · BRIDGEWATER · 396 served · groundwaternone on record
AQUARION-ARLINGTON ACRES · STONINGTON · 392 served · groundwaternone on record
AQUA VISTA ASSOC, INC · DANBURY · 388 served · groundwaternone on record
SCWA, ROBIN HILL DIVISION (RBN) · MONTVILLE · 388 served · groundwaternone on record
EAST HAMPTON WPCA - VILLAGE CENTER · EAST HAMPTON · 366 served · groundwaternone on record
HAZARDVILLE - RYE HILL SYSTEM · SOMERS · 352 served · purchased surface waternone on record
CTWC - ASHFORD PARK DIVISION · ASHFORD · 334 served · groundwaternone on record
AQUARION-PLEASURE VALLEY · NORWICH · 328 served · groundwaternone on record
WILLINGTON SENIOR CENTER & HOUSING · WILLINGTON · 327 served · groundwaternone on record
AQUARION-CARMEN HILL · NEW MILFORD · 322 served · groundwaternone on record
JEWETT CITY WATER CO., S & W SYSTEM · GRISWOLD · 320 served · groundwaternone on record
WYNDHAM PARK APARTMENTS · WINDHAM · 312 served · groundwaternone on record
AQUARION-TIMBER TRAILS · NEW FAIRFIELD · 310 served · groundwaternone on record
STERLING WATER SYSTEM · STERLING · 308 served · groundwaternone on record
AQUARION-POSSUM RIDGE · NEW FAIRFIELD · 307 served · groundwaternone on record
SUNNY WATERS MOBILE HOME PARK · NORWICH · 303 served · groundwaternone on record
MEADOWS APARTMENTS · MONTVILLE · 301 served · groundwaternone on record
THE FREDERICK GUNN SCHOOL, INC. · WASHINGTON · 300 served · groundwaternone on record
SCWA, BARRETT DIVISION (BAR) · LEDYARD · 300 served · groundwaternone on record
ARROWHEAD POINT HOMEOWNERS ASSN INC. · BROOKFIELD · 296 served · groundwaternone on record
AQUARION-OAKWOOD ACRES · NEW FAIRFIELD · 286 served · groundwaternone on record
OLD FARMS CONDOMINIUM ASSOCIATION INC · NEW MILFORD · 285 served · groundwaternone on record
CTWC - NORTHERN REGION-LAKEWOOD · COVENTRY · 276 served · groundwaternone on record
MOOSUP GARDEN APARTMENTS · PLAINFIELD · 270 served · groundwaternone on record
CTWC - BANNER VILLAGE · EAST HADDAM · 265 served · groundwaternone on record
CTWC - WESTCHESTER VILLAGE · COLCHESTER · 252 served · groundwaternone on record
AQUARION-INDIAN SPRING · DANBURY · 242 served · groundwaternone on record
CTWC - UCONN HUNTING LODGE DIV. · MANSFIELD · 234 served · purchased surface waternone on record
CTWC - PILGRIM HILLS DIVISION · COVENTRY · 229 served · groundwaternone on record
CTWC - CHIMNEY HILL · FARMINGTON · 227 served · purchased surface waternone on record
CTWC - LONDON PARK DIVISION · HEBRON · 221 served · groundwaternone on record
THE MARVELWOOD SCHOOL · KENT · 220 served · groundwaternone on record
AQUARION-JUDEA MAIN · WASHINGTON · 219 served · groundwaternone on record
CTWC - SDC WATER · VOLUNTOWN · 216 served · groundwaternone on record
AQUARION-CLEARVIEW HILLS · WOLCOTT · 215 served · purchased groundwaternone on record
HERITAGE COVE CONDOMINIUMS · ESSEX · 208 served · groundwaternone on record
CTWC - BAKER HILL DIVISION · EAST HAMPTON · 203 served · groundwaternone on record
AQUARION-HOLLANDALE ESTATES · DANBURY · 200 served · purchased surface waternone on record
CTWC - NORTHERN REG-LLYNWOOD SYSTEM · BOLTON · 192 served · groundwaternone on record
AQUARION-EAST HAMPTON · EAST HAMPTON · 189 served · groundwaternone on record
CTWC - COUNTRY MOBILE DIV. · GRISWOLD · 186 served · groundwaternone on record
CRYSTAL LAKE CONDOMINIUMS · SALEM · 184 served · groundwaternone on record
WATERFORD COUNTRY SCHOOL, INC. · WATERFORD · 180 served · groundwaternone on record
CTWC - RIVERSEDGE DIVISION · WILLINGTON · 179 served · purchased groundwaternone on record
BAXTER FARMS COMMUNITY WATER ASSOC · TOLLAND · 175 served · groundwaternone on record
SHAKER HEIGHTS WATER COMPANY · ENFIELD · 172 served · groundwaternone on record
CTWC - SACHEM VILLAGE CONDO · MARLBOROUGH · 166 served · groundwaternone on record
SCWA, CHRISWOOD DIVISION (CWD) · LEDYARD · 164 served · groundwaternone on record
AQUARION-DEAN HEIGHTS · NEW MILFORD · 162 served · groundwaternone on record
CTWC - NORTHERN REG-NATHAN HALE SYSTEM · COVENTRY · 160 served · groundwaternone on record
LISBON MOBILE HOMES · LISBON · 155 served · groundwaternone on record
CTWC - WESTCHESTER EAST · EAST HAMPTON · 153 served · groundwaternone on record
CTWC - UCONN DEPOT DIV. · MANSFIELD · 153 served · purchased groundwaternone on record
AQUARION-KEN OAKS · DANBURY · 152 served · purchased surface waternone on record
AQUARION-TWIN OAKS · NEW MILFORD · 152 served · groundwaternone on record
CANDLEWOOD SPRINGS PROPERTY OWNERS ASSN · NEW MILFORD · 148 served · groundwaternone on record
AQUARION-INDIAN FIELDS · BROOKFIELD · 147 served · groundwaternone on record
JEWETT CITY WATER CO-HILL-N-DALE · LISBON · 146 served · groundwaternone on record
CANDLEWOOD ORCHARDS PROPERTY OWNERS CORP · BROOKFIELD · 144 served · groundwaternone on record
SNUG HARBOR DEVELOPMENT CORP · DANBURY · 144 served · groundwaternone on record
AQUARION-TYLER LAKE · GOSHEN · 142 served · groundwaternone on record
NEW PRESTON WATER CO · WASHINGTON · 139 served · groundwaternone on record
BETHANY MOBILE HOME PARK · BETHANY · 138 served · groundwaternone on record
IDLEVIEW MOBILE HOME PARK · NAUGATUCK · 138 served · groundwaternone on record
CTWC - UCONN WILLOWBROOK DIV. · MANSFIELD · 134 served · purchased surface waternone on record
AQUARION-HICKORY HILLS · BROOKFIELD · 132 served · groundwaternone on record
AQUARION-VALLEY VIEW · MANSFIELD · 131 served · groundwaternone on record
AQUARION-BUTTERNUT · BROOKFIELD · 124 served · groundwaternone on record
TOWN IN COUNTRY CONDOMINIUMS - LOWER SYS · WOODBURY · 120 served · groundwaternone on record
BROOKWOODS II · KENT · 120 served · groundwaternone on record
TOWN IN COUNTRY CONDOMINIUMS - UPPER SYS · WOODBURY · 120 served · groundwaternone on record
AQUARION-BARNUM · RIDGEFIELD · 120 served · purchased surface waternone on record
BEE BROOK CROSSING CONDOMINIUMS · WASHINGTON · 120 served · groundwaternone on record
AQUARION-HAWKSTONE · OXFORD · 120 served · purchased surface waternone on record
SHADY ACRES MOBILE HOME PARK · DANBURY · 117 served · groundwaternone on record
DANBURY WATER DEPT-RIDGEVIEW GARDENS · DANBURY · 116 served · groundwaternone on record
AQUARION-ROLLING RIDGE · DANBURY · 115 served · purchased surface waternone on record
EVERGREEN SPRINGS - SYSTEM #4 · CLINTON · 110 served · groundwaternone on record
CTWC - MARLBOROUGH GARDENS · MARLBOROUGH · 110 served · groundwaternone on record
SCWA, BIRCHWOOD DIVISION (BWD) · MONTVILLE · 108 served · groundwaternone on record
ASH WATER COMPANY, LLC · LEDYARD · 108 served · groundwaternone on record
QUASSUK HEIGHTS CONDOMINIUM ASSN · WOODBURY · 108 served · groundwaternone on record
FERNWOOD REST HOME · LITCHFIELD · 107 served · groundwaternone on record
CTWC - GREEN SPRINGS SYSTEM · MADISON · 104 served · groundwaternone on record
AQUARION-WEST SHORE · MIDDLEBURY · 100 served · groundwaternone on record
BREEZY KNOLL ASSOCIATION · LITCHFIELD · 100 served · groundwaternone on record
AQUARION-CORNWALL · CORNWALL · 98 served · groundwaternone on record
BANTAM VILLAGE · LITCHFIELD · 96 served · groundwaternone on record
GREEN VILLAGE II · SALEM · 96 served · groundwaternone on record
CTWC - RIVERCREST DIVISION · PORTLAND · 88 served · groundwaternone on record
M&M REALTY HOLDINGS LLC · KILLINGWORTH · 87 served · groundwaternone on record
LAUREL HILL WATER ASSOCIATION · MARLBOROUGH · 86 served · groundwaternone on record
LAKEVIEW ESTATES - MIDDLEFIELD · MIDDLEFIELD · 85 served · groundwaternone on record
AQUARION-FIELDSTONE RIDGE · DANBURY · 84 served · groundwaternone on record
SYLVAN RIDGE CONDOMINIUMS · MIDDLEFIELD · 84 served · groundwaternone on record
AQUARION-QUARRY RIDGE · WASHINGTON · 84 served · groundwaternone on record
KNOB HILL CONDOMINIUMS · COLCHESTER · 84 served · groundwaternone on record
FRANKLIN ACADEMY · EAST HADDAM · 81 served · groundwaternone on record
AQUARION-LAUREL RIDGE · NEW MILFORD · 80 served · groundwaternone on record
COVENTRY HOUSING AUTHORITY-LOWER SYSTEM · COVENTRY · 80 served · groundwaternone on record
COVENTRY HOUSING AUTHORITY-UPPER SYSTEM · COVENTRY · 80 served · groundwaternone on record
RYE FIELD MANOR ELDERLY HOUSING · OLD LYME · 78 served · groundwaternone on record
CTWC - BIRCHWOOD HEIGHTS · MANSFIELD · 76 served · groundwaternone on record
MIDDLEBURY COMMONS · MIDDLEBURY · 76 served · groundwaternone on record
AQUARION-BERKSHIRE · BETHEL · 75 served · purchased surface waternone on record
NORTH PURCHASE ELDERLY HOUSING · BETHLEHEM · 72 served · groundwaternone on record
WOODBURY PLACE CONDOMINIUM ASSN · WOODBURY · 72 served · groundwaternone on record
OAK GROVE SENIOR HOUSING CORP · EAST HADDAM · 72 served · groundwaternone on record
AQUARION-WOODRICH VILLAGE · WOLCOTT · 72 served · groundwaternone on record
APPLE VALLEY VILLAGE · SOUTHINGTON · 70 served · groundwaternone on record
CHATFIELD HILL ASSN., INC. · SALISBURY · 68 served · groundwaternone on record
EVERGREEN SPRINGS - SYSTEM #3 · CLINTON · 68 served · groundwaternone on record
CTWC - PINEWOODS LANE DIV · MANSFIELD · 68 served · groundwaternone on record
AQUARION-JUDEA DEPOT · WASHINGTON · 68 served · groundwaternone on record
AQUARION-MCKEON · RIDGEFIELD · 67 served · purchased surface waternone on record
AQUARION-BIRCHES · NEW FAIRFIELD · 66 served · groundwaternone on record
MYSTIC VILLAGE APARTMENTS · GROTON · 66 served · groundwaternone on record
GREEN VILLAGE · EAST HADDAM · 65 served · groundwaternone on record
AQUARION-INTERLAKEN · NEW FAIRFIELD · 64 served · groundwaternone on record
METACOMET HOMES-WELL 1 AND WELL 2 · EAST GRANBY · 63 served · groundwaternone on record
CTWC - NORTHERN REG-RESERVOIR HEIGHTS · VERNON · 62 served · purchased surface waternone on record
SHARON RIDGE APARTMENTS · SHARON · 62 served · groundwaternone on record
CTWC - PONEMAH VILLAGE · COLCHESTER · 60 served · groundwaternone on record
ROCKTREE APARTMENTS · BARKHAMSTED · 60 served · groundwaternone on record
WOODCREST ASSOCIATION, INC · BURLINGTON · 60 served · groundwaternone on record
EASTVIEW KOZLEY WATER ASSOCIATION · TOLLAND · 60 served · groundwaternone on record
CTWC - CORNFIELD POINT DIV. · WOODSTOCK · 57 served · groundwaternone on record
JUSTICE RESOURCE INSTITUTE, INC. · THOMPSON · 56 served · groundwaternone on record
KUGEMAN VILLAGE · CORNWALL · 54 served · groundwaternone on record
FARMINGTON LINE WEST CONDOMINIUMS · BURLINGTON · 51 served · groundwaternone on record
BRIDGEWATER COMMONS CONDOMINIUMS · BRIDGEWATER · 51 served · groundwaternone on record
SHARON HEIGHTS WATER ASSOCIATION · BLOOMFIELD · 51 served · groundwaternone on record
BARKHAMSTED HILLS LLC · BARKHAMSTED · 50 served · groundwaternone on record
EVERGREEN SPRINGS - SYSTEM #1 · CLINTON · 45 served · groundwaternone on record
DURHAM LEXINGTON PLACE DIVISION · DURHAM · 45 served · groundwaternone on record
TOUCHSTONE N.A.F.I. · LITCHFIELD · 43 served · groundwaternone on record
DODGE FARM · WASHINGTON · 42 served · groundwaternone on record
CHATHAM APARTMENTS · EAST HAMPTON · 40 served · groundwaternone on record
GARDEN LANE APARTMENTS · HARWINTON · 40 served · groundwaternone on record
TUNNEL HILL MOBILE HOME PARK · LISBON · 40 served · groundwaternone on record
27 MAPLE DRIVE · MONROE · 38 served · groundwaternone on record
HIGH MEADOW · HADDAM · 38 served · groundwaternone on record
AQUARION-PARK GLEN · NEW MILFORD · 37 served · groundwaternone on record
TASHUA VILLAGE ASSOCIATION, INC. · TRUMBULL · 35 served · groundwaternone on record
EVERGREEN SPRINGS - SYSTEM #2 · CLINTON · 35 served · groundwaternone on record
OAKRIDGE VILLAGE · MONTVILLE · 33 served · groundwaternone on record
ARNIO DRIVE LLC · PLAINFIELD · 33 served · groundwaternone on record
CTWC - COLUMBIA HEIGHTS DIV. · COLUMBIA · 32 served · groundwaternone on record
LYME REGIS, INC. · OLD LYME · 32 served · groundwaternone on record
CTWC - POMPEY HOLLOW DIVISION · ASHFORD · 32 served · groundwaternone on record
CTWC - FLORENCE LORD (MASH) · MARLBOROUGH · 30 served · groundwaternone on record
WESTSIDE MANOR · EAST HAMPTON · 30 served · groundwaternone on record
WINDSORVILLE WATER ASSOCIATION · EAST WINDSOR · 29 served · groundwaternone on record
WOODLAND TERRACE · COLUMBIA · 27 served · groundwaternone on record
QUONNIPAUG HILLS - SECTION I · GUILFORD · 27 served · groundwaternone on record
SCWA, SEVEN OAKS (OAK) · MONTVILLE · 26 served · groundwaternone on record
ST. THOMAS MORE SCHOOL-THE COVE · MONTVILLE · 25 served · groundwaternone on record
DARTMOUTH VILLAGE ELDERLY HOUSING · COLUMBIA · 25 served · groundwaternone on record
FOXRIDGE APARTMENTS-WELL 1 · BARKHAMSTED · 25 served · groundwaternone on record
VILLAGE AT CRYSTAL SPRINGS · TOLLAND · 25 served · groundwaternone on record
Source: U.S. EPA Safe Drinking Water Information System (SDWIS). "Health-based" counts maximum-contaminant-level, treatment-technique and maximum-residual-disinfectant-level violations recorded since 2015. A violation on record — especially a resolved one — is not a statement about water quality today; contact the water system or your state drinking-water program for current information.