Connecticut
Hartford County drinking water quality
217 active public water systems serve 835,730 people in Hartford County. 75 are compliant, 142 had at least one EPA violation in the past three years, 4 are designated serious violators, and 34 carry a health flag.
Active systems
217
47 community systems
People served
836K
by public water systems
Systems with violations
142
65% of active systems, past 3 years
Serious violators
4
34 systems carry a health flag
Needs attention
Apple Rehab
CT1190021 · Rocky Hill · Community water system · Serves 238
6 rules violated in the past three years. Unresolved: Lead and Copper Rule and Lead and Copper Rule Revisions.
Juniper Club Inc.
CT0110051 · Bloomfield · Community water system · Serves 104
5 rules violated in the past three years. Unresolved: Revised Total Coliform Rule, Lead and Copper Rule Revisions, and Public Notice Rule and Revised PN Rule.
Donut Twist LLC
CT0798074 · Marlborough · Transient non-community system · Serves 29
2 rules violated in the past three years. Unresolved: Ground Water Rule.
Windsorville Water Association
CT0470031 · East Windsor · Community water system · Serves 29
8 rules violated in the past three years. Unresolved: Lead and Copper Rule.
Berlin Water Control Commission
CT0070021 · Berlin, Middletown, Newington · Community water system · Serves 5,128
5 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions and Public Notice Rule and Revised PN Rule.
Cherry Brook School
CT0230392 · Canton · Non-Transient non-community system · Serves 615
2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions and Public Notice Rule and Revised PN Rule.
Elisabeth M. Bennet Academy
CT0779083 · Manchester · Non-Transient non-community system · Serves 536
2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Gqc Well Commission
CT0400041 · East Granby · Community water system · Serves 360
3 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions and Public Notice Rule and Revised PN Rule.
Turkey Hill of East Granby, LLC
CT0400031 · East Granby · Community water system · Serves 360
4 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Ethel Walker School
CT1280051 · Simsbury · Community water system · Serves 325
3 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
25 more systems with a serious violator or health flag designation are in the lists below.
Community water systems
47 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Metropolitan District Commission Berlin, Bloomfield, Cromwell and 14 more |
390,887 | 1 | 0 | |
|
Ctwc Northern Reg-Western System East Granby, East Windsor, Ellington and 9 more |
101,313 | 1 | 1 | |
|
New Britain Water Department Berlin, Farmington, New Britain and 3 more |
73,534 | 1 | 0 | |
|
Bristol Water Department Bristol, Burlington, Plainville and 2 more |
52,079 | 1 | 0 | |
|
Manchester Water Department Glastonbury, Manchester, South Windsor and 1 more |
51,198 | 2 | 0 | |
|
Southington Water Department Cheshire, Southington, Wolcott |
43,069 | 4 | 0 | |
|
Hazardville Water Company East Windsor, Enfield, Somers |
18,544 | 0 | 0 | |
|
Aquarion-Plainville Regional Bristol, Farmington, Plainville and 1 more |
18,231 | 1 | 0 | |
|
Ctwc Unionville System Avon, Bristol, Farmington and 1 more |
14,693 | 1 | 0 | |
|
Aquarion-Simsbury Regional East Granby, Granby, Simsbury |
14,691 | 0 | 0 | |
|
Avon Water CO Avon, Farmington, Simsbury |
11,590 | 1 | 1 | |
|
Kensington Fire District Berlin, New Britain, Newington |
7,553 | 4 | 0 | |
|
Ctwc Naugatuck Reg-Collinsville Sys Avon, Burlington, Canton and 1 more |
6,324 | 0 | 0 | |
|
Berlin Water Control Commission Berlin, Middletown, Newington |
5,128 | 5 | 2 | |
|
Worthington Fire District Berlin |
2,875 | 3 | 0 | |
|
Connecticut Correctional Institute Enfield, Somers |
2,385 | 1 | 0 | |
|
Salmon Brook District Water Dept Granby |
2,151 | 2 | 0 | |
|
Tariffville Fire District Water Dept Simsbury |
1,477 | 3 | 1 | |
|
Aquarion-Marlborough Marlborough |
1,348 | 0 | 0 | |
|
Aquarion-Suffield Suffield |
595 | 1 | 1 | |
|
Ctwc Redwood Farms Division Manchester |
424 | 0 | 0 | |
|
Gqc Well Commission East Granby |
360 | 3 | 2 | |
|
Turkey Hill of East Granby, LLC East Granby |
360 | 4 | 1 | |
|
Ethel Walker School Simsbury |
325 | 3 | 1 | |
|
Apple Rehab Rocky Hill |
238 | 6 | 2 | |
|
Ctwc Chimney Hill Farmington |
227 | 0 | 0 | |
|
Old Newgate Ridge Water Company INC East Granby |
208 | 3 | 3 | |
|
Shaker Heights Water Company Enfield |
172 | 2 | 1 | |
|
Ctwc Sachem Village Condo Marlborough |
166 | 0 | 0 | |
|
Marlborough Health Care Center, INC Marlborough |
165 | 1 | 1 | |
|
Chelsea Common Condominium Association East Granby |
126 | 2 | 2 | |
|
Ctwc Marlborough Gardens Marlborough |
110 | 0 | 0 | |
|
Juniper Club Inc. Bloomfield |
104 | 5 | 3 | |
|
Ctwc Forest Homes Division Marlborough |
100 | 1 | 1 | |
|
Grant Hill Associates, Inc. Bloomfield |
97 | 3 | 2 | |
|
East Windsor Housing Authority East Windsor |
94 | 2 | 1 | |
|
Laurel Hill Water Association Marlborough |
86 | 2 | 0 | |
|
School Hill Association, Inc. East Windsor |
77 | 5 | 1 | |
|
Apple Valley Village Southington |
70 | 0 | 0 | |
|
Metacomet Homes-Well 1 and Well 2 East Granby |
63 | 0 | 0 | |
|
Woodcrest Association, INC Burlington |
60 | 0 | 0 | |
|
Farmington Line West Condominiums Burlington |
51 | 0 | 0 | |
|
Sharon Heights Water Association Bloomfield |
51 | 3 | 2 | |
|
Ctwc Florence Lord (mash) Marlborough |
30 | 0 | 0 | |
|
Orchard Hill Association Bloomfield |
30 | 4 | 0 | |
|
Windsorville Water Association East Windsor |
29 | 8 | 1 | |
|
298-302 Albany Turnpike Canton |
28 | 4 | 1 |
Non-community systems (170: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (1,144, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Connecticut records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.