Total Coliform in Colorado Drinking Water
120 public water systems in Colorado have historical EPA violation records associated with total coliform in the Q2 2026 snapshot.
270
Historical Records in Colorado
120
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)
Colorado Systems With the Most Total Coliform Records
PRYOR WATER SYSTEM
406 served2 historical records
C
ARAPAHOE COMM WATER SYSTEM
4,100 served2 historical records
B
BELCOURT-TURTLE MTN RURAL WATER SYSTEM
13,500 served1 historical record
D
ASHLAND COMMUNITY WATER SYSTEM
210 served1 historical record
B
LOWER BRULE RURAL WATER SUPPLY SYSTEM
1,637 served1 historical record
C
BLACKFOOT WATER SYSTEM
56 served1 historical record
C
HOULE VILLA WATER SYSTEM
50 served1 historical record
B
MNIHNAPA WATER SYSTEM
220 served1 historical record
A
HEART BUTTE SCHOOL
250 served1 historical record
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.