Connecticut Water Quality
710 water systems serving 3,102,576 people. 24,770 total violations on record.
Safety Grade Distribution
A
398
56%
B
55
8%
C
202
28%
D
42
6%
F
13
2%
710
Water Systems
3,102,576
Population Served
24,770
Total Violations
654
Health-Based
Most Contaminated Systems
SOUTHBURY TRAINING SCHOOL
816 served513 violations473 recent
C
STONY HILL VILLAGE CONDOMINIUM ASSN
392 served470 violations457 recent
C
OLD FARMS CONDOMINIUM ASSOCIATION INC
285 served413 violations379 recent
C
BROOKFIELD HOUSING AUTHORITY
37 served552 violations363 recent
D
SALEM MANOR CONDOMINIUMS, SYSTEM #1
32 served317 violations302 recent
C
BERLIN WATER CONTROL COMMISSION
5,128 served376 violations218 recent
C
COLCHESTER ESTATES
276 served235 violations218 recent
C
WALLINGFORD WATER DEPARTMENT
37,267 served241 violations200 recent
C
M&M REALTY HOLDINGS LLC
87 served196 violations196 recent
C
CANDLEWOOD KNOLLS WATER AUTHORITY
524 served297 violations190 recent
C
Cleanest Water Systems
REGIONAL WATER AUTHORITY
418,900 served58 violations
A
TORRINGTON WATER COMPANY
37,915 served5 violations
A
NORWICH PUBLIC UTILITIES
36,163 served29 violations
A
CTWC - SHORELINE REGION-GUILFORD SYSTEM
33,975 served0 violations
A
Pechanga
29,100 served0 violations
A
UNIVERSITY OF CONNECTICUT - MAIN CAMPUS
27,199 served5 violations
A
GRIC DPW Wild Horse Pass
22,795 served0 violations
A
CTWC - NAUGATUCK REGION-CENTRAL SYSTEM
22,735 served1 violations
A
Salt River Public Works
20,951 served0 violations
A
AQUARION-DARIEN
18,737 served2 violations
A
Largest Water Systems in Connecticut
| Water System | Grade | Population | Violations |
|---|---|---|---|
| REGIONAL WATER AUTHORITY | A | 418,900 | 58 |
| METROPOLITAN DISTRICT COMMISSION | B | 390,887 | 4 |
| AQUARION-EASTERN FAIRFIELD COUNTY | C | 351,756 | 298 |
| AQUARION-STAMFORD | B | 119,214 | 44 |
| WATERBURY WATER DEPARTMENT | C | 107,271 | 15 |
| CTWC - NORTHERN REG-WESTERN SYSTEM | B | 101,313 | 108 |
| NEW BRITAIN WATER DEPARTMENT | B | 73,534 | 18 |
| DANBURY WATER DEPARTMENT | D | 62,055 | 19 |
| MERIDEN WATER DIVISION | D | 58,441 | 18 |
| AQUARION-GREENWICH | C | 53,297 | 60 |
| BRISTOL WATER DEPARTMENT | C | 52,079 | 23 |
| MANCHESTER WATER DEPARTMENT | C | 51,198 | 10 |
| SOUTHINGTON WATER DEPARTMENT | C | 43,069 | 356 |
| SOUTH NORWALK ELECTRIC & WATER | C | 42,000 | 12 |
| MIDDLETOWN WATER DEPARTMENT | C | 41,019 | 7 |
| NORWALK FIRST TAXING DISTRICT | C | 40,256 | 4 |
| TORRINGTON WATER COMPANY | A | 37,915 | 5 |
| WALLINGFORD WATER DEPARTMENT | C | 37,267 | 241 |
| NORWICH PUBLIC UTILITIES | A | 36,163 | 29 |
| CTWC - SHORELINE REGION-GUILFORD SYSTEM | A | 33,975 | 0 |
Contaminants in Connecticut
Cities in Connecticut
SHELTON(68)NEW HAVEN(1)HARTFORD(1)CLINTON(63)WATERBURY(2)NEW BRITAIN(1)DANBURY(13)MERIDEN(1)BRISTOL(2)MANCHESTER(2)WATERFORD(2)MIDDLETOWN(3)SOUTHINGTON(1)WILTON(2)NORWALK(2)WALLINGFORD(2)NORWICH(4)Sacaton(5)GROTON(2)Temecula(1)STORRS(5)ENFIELD(7)Wildhorse Pass Casino, St. Johns Komatke(1)Scottsdale(4)Whiteriver(4)MANSFIELD CENTER(1)Salt River Indian Community(1)Banning(1)Parker(5)NIANTIC(3)Sells(27)Pala(3)San Carlos(8)CROMWELL(1)Brooks(1)GALES FERRY(17)El Cajon(1)Maricopa(1)Ak-Chin Village(1)Shingle Springs(1)BETHEL(3)Friant(1)Table Mountain(1)OAKVILLE(2)Alpine(1)Valley Center(6)Needles(5)BERLIN(2)WINSTED(1)PUTNAM(6)KENSINGTON(1)Fountain Hills(1)Pauma Valley(4)WATERTOWN(3)LEDYARD(2)Yuma(1)Sacaton, Sacaton Flats,Upper San Tan, Bl(1)PORTLAND(2)Peach Springs(2)Havasu Lake(2)COLCHESTER(2)Polacca(1)First Mesa Consolidated Villages(1)Sells, Big Fields(1)Big River(1)Colusa(2)Fort Defiance(2)Hoopa(1)Bylas(1)NEWTOWN(2)San Jacinto(1)Camp Verde(3)Hotevilla(2)Thermal(16)Bishop(1)Bishop Paiute-Shoshone Reservation(1)Second Mesa(3)Casa Blanca,Bapchule,Wet Camp,Sacate,Wes(1)Cibecue(1)Porterville(2)Payson(1)Stotonic, Goodyear, Gila Butte, Sweetwat(1)Tule River Reservation(1)WOLCOTT(1)Loleta(3)WETHERSFIELD(1)Tuba City(2)Middle Verde(1)GRANBY(1)TOLLAND(11)Washington(6)DURHAM(6)Peridot(1)Keams Canyon(2)Redding(1)Nixon(3)UNCASVILLE(5)Torreon/Ojo Encino, New Mexico(1)NOANK(1)Shungopavi(1)