Total Coliform in Connecticut Drinking Water
158 public water systems in Connecticut have historical EPA violation records associated with total coliform in the Q2 2026 snapshot.
432
Historical Records in Connecticut
158
Systems With Records
About Total Coliform
- EPA Limit
- N/A
- Category
- Microbiological
- Health Effects
- Indicates possible presence of harmful bacteria
- Common Treatment Approaches
- Disinfection (chlorine, UV)
Connecticut Systems With the Most Total Coliform Records
SCUA Upper Seven Mile
8,478 served18 historical records
F
Duck Valley Owyhee
150 served14 historical records
D
Duck Valley Newtown
450 served10 historical records
C
Hopi High School - BIA
1,005 served9 historical records
F
Las Vegas Paiute Snow Mountain
2,340 served7 historical records
D
SCUA Bylas
3,160 served7 historical records
F
SCUA Lower Peridot
702 served7 historical records
F
Polacca
3,890 served6 historical records
F
Utu Utu Gwaitu Paiute Tribe
222 served6 historical records
F
Wadsworth
950 served6 historical records
D
SCUA Beverly Hills
612 served6 historical records
D
Avi Casino
3,001 served5 historical records
F
Grand Canyon West
3,120 served5 historical records
C
SCUA Skill Center
234 served5 historical records
C
Ft. McDermitt Paiute-Shoshone - Upper
110 served4 historical records
D
Kashia
153 served4 historical records
D
Goshute (Upper)
40 served4 historical records
D
Barajas MHP
25 served3 historical records
C
Yomba Indian Reservation
30 served3 historical records
D
BIA Truxton Agency
16 served3 historical records
C
These counts describe historical compliance records, not present concentrations or household test results. Confirm current conditions with the utility's latest Consumer Confidence Report.